chore(meta): release v0.1.9

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/create-skill/SKILL.md

@@ -178,7 +178,11 @@ For design patterns, consult:
 **Writing guidelines:** Always use imperative/infinitive form.
 
 **Frontmatter:**
-- `name`: The skill name
+- `name`: The skill name — use **domain-action** naming: `{domain}-{action}`.
+  The domain is the system/area the skill operates on, the action is what it does.
+  Examples: `pr-review`, `sprint-plan`, `docs-search`, `git-commit`, `debt-scan`.
+  Multi-action wrappers (like `ticket`) can use the domain name alone.
+  The directory name must match the `name` field.
 - `description`: Primary triggering mechanism. Include what the skill does AND
   specific triggers/contexts. All "when to use" info goes here (not in body).
 

.claude/skills/push-pr/SKILL.md

@@ -103,6 +103,25 @@ tea pr create \
 
 Report PR URL when done.
 
+### 7. Update ticket status to review
+
+Scan all commit messages in the PR for ticket references (`#NNN`):
+
+```bash
+git log --oneline main..<branch>
+```
+
+Extract ticket IDs from `#NNN` patterns. For each ticket that is
+currently `in_progress`, update it to `review`:
+
+```bash
+db/connectors/ticket status <id> review
+```
+
+Report which tickets were moved to review. Skip tickets that are
+already `done`, `review`, `cancelled`, or `backlog` (only transition
+`in_progress` → `review`).
+
 ## Arguments
 
 If the user passes arguments (e.g., `/push-pr "my title"`), use them as the

.claude/skills/review-pr/SKILL.md

@@ -140,6 +140,10 @@ Respond with:
    - File path and approximate location
    - Severity: critical / warning / suggestion
    - Description of the issue
+
+Verdict rules:
+- Any **critical** or **warning** issue → REQUEST_CHANGES
+- Only **suggestion**-level issues (or none) → APPROVE
 If no issues found, say APPROVE with a brief positive summary.
 ```
 

.claude/skills/start-sprint/SKILL.md

@@ -1,10 +1,12 @@
 ---
 name: start-sprint
 description: >
-  Start sprint work on a team branch. Use when the user says "start sprint",
-  "start working on the server/client/copy", "begin sprint", or invokes
-  /start-sprint. Merges main into the team branch, finds the active sprint,
-  reads the sprint briefing, and presents the work plan with ticket details.
+  Start sprint work on a team branch, or close a sprint from main. Use when
+  the user says "start sprint", "start working on the server/client/copy",
+  "begin sprint", or invokes /start-sprint. On a team branch: merges main,
+  finds the active sprint, reads the briefing, presents the work plan. On
+  main: closes the active sprint, bumps the version (v0.1.N), updates the
+  changelog, tags, and pushes.
 user-invocable: true
 allowed-tools: Bash, Read, Grep, Glob, TeamCreate, Task, TaskCreate, TaskUpdate, TaskList, SendMessage, AskUserQuestion
 ---
@@ -24,7 +26,68 @@ git branch --show-current
 ```
 
 Valid team branches: `server`, `client`, `copy`, `audio`, `visual`, `ci`.
-If on `main`, ask the user which team branch to check out first.
+
+If on `main`, follow the **Main branch workflow** below instead of
+the team branch workflow (steps 2–8).
+
+---
+
+## Main branch workflow (sprint close + version bump)
+
+When `/start-sprint` is run on `main`, it means the user wants to close
+the current sprint, cut a version, and prepare for the next one.
+
+### M1. Close the active sprint
+
+```bash
+db/connectors/sprint stop
+```
+
+This marks the active sprint as completed and lists carry-over candidates.
+Note the sprint number (N) from the output.
+
+### M2. Bump the version
+
+The project version scheme is `v0.1.{sprint_number}`. After closing
+sprint N, the version is `v0.1.N`.
+
+Update `CHANGELOG.md`:
+- Move all entries under `## [Unreleased]` into a new section
+  `## [v0.1.N] — YYYY-MM-DD` (using today's date).
+- Leave `## [Unreleased]` as an empty section above the new version.
+- Keep the existing sub-headings (Added, Fixed, Changed, Removed) —
+  only move entries that have content.
+
+### M3. Commit the release
+
+Stage and commit `CHANGELOG.md`:
+```
+chore(meta): release v0.1.N
+```
+
+### M4. Tag the release
+
+```bash
+git tag v0.1.N
+```
+
+### M5. Push
+
+```bash
+git push && git push --tags
+```
+
+### M6. Report
+
+Output a summary:
+- Sprint closed (name, done/total tickets, carry-over count)
+- Version tagged (`v0.1.N`)
+- Carry-over candidates (if any)
+- Suggest running `/plan-sprint` next to prepare the next sprint
+
+---
+
+## Team branch workflow
 
 ### 2. Sync with main
 
@@ -68,18 +131,23 @@ db/connectors/ticket show <id>
 Read the decision files referenced in the sprint briefing so the agent has
 full architectural context before starting work.
 
-### 7. Present the work plan
+### 7. Mark tickets in progress and present the work plan
 
-Output a summary:
+Mark all actionable (unblocked, non-done) tickets in the sprint as
+`in_progress`:
+
+```bash
+db/connectors/ticket status <id> in_progress
+```
+
+Then output a summary:
 - Sprint name and goal
 - Branch status (clean merge or conflicts)
-- Actionable tickets (unblocked, ready to start)
+- Tickets marked in_progress (list with IDs)
 - Blocked tickets (and what blocks them)
 - Key decisions loaded
 - Suggested first task (lowest ID unblocked ticket)
 
-Do NOT mark any ticket as `in_progress` yet.
-
 ### 8. Confirm and spawn the team
 
 Before spawning agents, use `AskUserQuestion` to confirm the work plan and

CHANGELOG.md

@@ -6,7 +6,46 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+## [v0.1.9] — 2026-02-18
+
+### Fixed
+- `make game` now builds client before launching — was missing `build-client` dependency, causing class_name registration failures after `make clean`
+- `build-client` uses `--import --quit` instead of just `--quit` — ensures `.godot/` cache and `global_script_class_cache.cfg` are created from scratch
+- `make clean` preserves `client/.godot/` directory (clears contents only) to avoid Godot startup issues
+
 ### Added
+- `--description TEXT` flag for `ticket create` CLI — previously required raw SQL workaround to set ticket descriptions
+
+### Changed
+- UI audio assets revised — monologue chimes re-generated (0.8s, insert-tech aesthetic), fog_recognition re-generated (was silent), all 8 assets normalized to 44.1kHz stereo LUFS -16 (#453)
+- review-pr skill: explicit verdict rules — critical/warning → REQUEST_CHANGES, suggestion-only → APPROVE
+
+### Added
+- `make golden-diff` + `make golden-update` targets (#486) — developer workflow for golden file comparison and regeneration; safe restore on cargo failure
+- Gauntlet checklist YAML schema (#497) — 7 condition types evaluable from ObserverSnapshot, per-room checklists for 3 rooms, `make checklist-validate` and `make checklist-generate` targets, wired into `pre-pr-content` gate
+- Gauntlet room timer + personal bests (#496) — GauntletHUD shows TIMER: MM:SS (PB: MM:SS), starts on room entry, resets on room change, persists stats to user://dev/gauntlet-stats.json, session summary on disconnect, hidden in non-gauntlet mode
+- WRONG button F12 MVP (#495) — bug report capture: pause sim, show modal prompt, save snapshot.json + render.txt + description.txt to user://bug-reports/, Esc to cancel
+- GameState.room_id and gauntlet_mode fields — parsed from ObserverSnapshot, enabling gauntlet UI
+- BUG_REPORT action in InputMapper (F12 binding) with SimBridge wire guard (client-only)
+- 24 new anti-tedium tests — GauntletHUD lifecycle (16: timer, PB, visibility, room change, session tracking) + BugReportDialog (8: pause/unpause, wire guard, text render, edge cases)
+- whatsinagame starter kit — reusable multi-agent team bootstrap for any project (3-tier profiles, 18 skills, 16 agent archetypes, stakeholder personas, ticketing DB, decision tracking)
+- Domain-action naming convention for skills documented in create-skill guide
+- `gauntlet` feature flag (default-on) — allows stripping Gauntlet test world from release builds with `--no-default-features`
+- `EXPECTED_ENTITY_COUNT` and `RESET_PLATE_STABLE_IDS` constants — entity counts derived from StableId ranges instead of hardcoded values
+- Debounce exact-boundary test for room reset (tick 9 rejected, tick 10 accepted)
+- Reset plate StableId verification in `stable_id_ranges_match_spec`
+- Runtime content test (`content_runtime.rs`) separated from structural loading tests
+- Client P2 tests (#492) — 16 gdUnit4 tests for camera (smoothing, zoom, viewport, follow, no-pan), entity alpha/color (peripheral, forward, NPC color, player constant), UI (monologue, interaction, inventory, dialogue, pause, fog blob, fog z_index)
+- Client P3 tests (#493) — 12 gdUnit4 tests for z-layer ordering (floor/ysort/fog/UI), entity lerp (snap, converge, LERP_SPEED=12.0), Tyre additions (recognition, facing, delta scaling, blob removal)
+- Anti-tedium regression tests (#494) — 5 tests: F12 no-crash guard, no queued input, gauntlet UI hidden in default/normal snapshot/multi-tick modes
+
+### Changed
+- Room reset API consolidated to `plan_reset` only — `execute_reset` removed (was a maintenance trap; production uses Commands via `plan_reset`)
+- `room_at()` documented with z-range and corridor overlap assumptions
+- TCP runtime test now has 10s read timeout and registers player in EntityRegistry
+
+### Removed
+- Dead `RoomMember` component from reset.rs (defined but never used)
 - Protocol v8: dialogue_response field decoding (DialogueResponseEvent with line_id, text, speaker_entity_id) from server #305/D-028
 - Test client binary scaffolding (#480) — standalone crate at `tooling/test-client/` with CLI (--connect, --replay, --text, --json, --quiet, --golden, --ticks), exit codes (0/1/2), golden file JSON diff, JSONL replay loader
 - Snapshot text renderer (#481) — `format_snapshot_text(&ObserverSnapshot)` pub-exported from server crate, entity labels as kind:entity_id sorted by distance, room name stub, 10 unit tests
@@ -15,6 +54,11 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Stance change audio (`sfx_stance_change.ogg`) — subtle mechanical click for stance toggle feedback (#440)
 
 ### Fixed
+- MessagePack int_64 encoder dead code branch (#516) — `-(1 << 63)` overflowed making int_64 branch unreachable; negative values beyond int_32 now correctly encode as 0xd3 instead of 0xcf
+- Cross-encoder fixture pipeline hardened — encode failures now exit non-zero instead of writing empty .msgpack files (#475 review)
+- GDScript fixture test no longer silently skips on missing/empty fixture dir — asserts instead (#475 review)
+- GDScript fixture generator covers all PlayerAction variants (added MoveSouth, MoveEast, MoveWest, Unpause, ToggleStanceDown, WalkAway)
+- `make pre-pr` now checks GDScript fixture staleness alongside Rust fixtures
 - Protocol version bumped from 7 to 8 to match server — fixes 5 test failures from version mismatch
 - Interact action encoding changed from unit variant to struct variant to match server's PlayerAction::Interact { target_entity_id, verb }
 - Monologue duplication test (test_monologue_not_duplicated_after_consumption) fixed — was using poll_snapshot() which doesn't consume _last_snapshot in test mode

Makefile

@@ -4,7 +4,9 @@ GODOT := $(shell command -v godot4 2>/dev/null || command -v godot 2>/dev/null)
        decisions-sync decisions-coverage decisions-active decisions-orphan \
        db-backup db-install validate-content content-ron check-fact-ids setup-hooks \
        pre-pr pre-pr-lint pre-pr-build pre-pr-test pre-pr-validate pre-pr-fixtures \
-       pre-pr-server pre-pr-client pre-pr-content
+       pre-pr-server pre-pr-client pre-pr-content \
+       fixtures-client golden-diff golden-update \
+       checklist-validate checklist-generate
 
 # --- Configuration ---
 
@@ -37,6 +39,11 @@ help:
 	@echo "  make validate-content   Validate content YAML against schemas"
 	@echo "  make check-fact-ids    Check fact_id references against knowledge catalogs"
 	@echo "  make content-ron       Convert content YAML to RON (build-time)"
+	@echo "  make fixtures-client    Generate GDScript->Rust cross-encoder fixtures (#475)"
+	@echo "  make golden-diff        Show diff if golden file output has changed"
+	@echo "  make golden-update      Regenerate golden file and stage for commit"
+	@echo "  make checklist-validate Validate checklist YAML against schema"
+	@echo "  make checklist-generate Validate checklists + print condition summary"
 	@echo ""
 	@echo "  make pre-pr             Run all pre-PR checks (lint, build, test, validate, fixtures)"
 	@echo "  make pre-pr-server      Server-scoped pre-PR (lint, build, test, fixtures)"
@@ -63,6 +70,8 @@ setup-tooling:
 	@command -v python3 >/dev/null 2>&1 || { echo "Install Python 3"; exit 1; }
 	@command -v curl >/dev/null 2>&1 || { echo "Install curl (required for Godot download)"; exit 1; }
 	@command -v unzip >/dev/null 2>&1 || { echo "Install unzip (required for Godot download)"; exit 1; }
+	@python3 -c "import yaml" 2>/dev/null || { echo "Install PyYAML: pip install pyyaml"; exit 1; }
+	@python3 -c "import jsonschema" 2>/dev/null || { echo "Install jsonschema: pip install jsonschema"; exit 1; }
 
 setup-hooks:
 	@git config core.hooksPath .config/hooks
@@ -77,7 +86,7 @@ build-server:
 
 build-client:
 	@test -n "$(GODOT)" || { echo "Godot not found. Run 'make setup' first."; exit 1; }
-	$(GODOT) --headless --path client --quit
+	$(GODOT) --headless --path client --import --quit
 
 # --- Run ---
 
@@ -88,7 +97,7 @@ client:
 	@test -n "$(GODOT)" || { echo "Godot not found. Run 'make setup' first."; exit 1; }
 	$(GODOT) --path client
 
-game: stop build-server
+game: stop build
 	@test -n "$(GODOT)" || { echo "Godot not found. Run 'make setup' first."; exit 1; }
 	@echo "Starting server..."
 	@cd server && cargo run &
@@ -111,6 +120,41 @@ test-server:
 fixtures:
 	cd server && cargo test --test gen_fixtures -- --ignored
 
+fixtures-client:
+	@test -n "$(GODOT)" || { echo "Godot not found. Run 'make setup' first."; exit 1; }
+	@echo "Generating GDScript fixtures for Rust decoder..."
+	$(GODOT) --headless --path client -s res://tests/gen_client_fixtures.gd
+	@echo "Verifying Rust can decode GDScript fixtures..."
+	cd server && cargo test --test serialization gdscript_generated_fixtures
+	@echo "--- Fixtures-client: PASS ---"
+
+golden-diff:
+	@echo "Regenerating golden output for comparison..."
+	@mkdir -p .cache/golden
+	@cp server/tests/golden/proof_room_tick_10.json .cache/golden/before.json
+	@cd server && UPDATE_GOLDEN=1 cargo test --test golden_suite -- proof_room_tick_10_matches_golden; \
+		rc=$$?; \
+		cp ../server/tests/golden/proof_room_tick_10.json ../.cache/golden/after.json 2>/dev/null; \
+		cp ../.cache/golden/before.json ../server/tests/golden/proof_room_tick_10.json; \
+		if [ $$rc -ne 0 ]; then echo "Cargo test failed (golden file restored)."; exit $$rc; fi
+	@if diff -q .cache/golden/before.json .cache/golden/after.json >/dev/null 2>&1; then \
+		echo "--- Golden file: UP TO DATE ---"; \
+	else \
+		echo "--- Golden file has CHANGED ---"; \
+		echo ""; \
+		diff --color -u .cache/golden/before.json .cache/golden/after.json || true; \
+		echo ""; \
+		echo "Run 'make golden-update' to accept changes."; \
+		exit 1; \
+	fi
+
+golden-update:
+	@echo "Regenerating golden file..."
+	@cd server && UPDATE_GOLDEN=1 cargo test --test golden_suite -- proof_room_tick_10_matches_golden
+	@git add server/tests/golden/
+	@echo "--- Golden file updated and staged ---"
+	@echo "Review with: git diff --cached -- server/tests/golden/"
+
 test-client:
 	@test -n "$(GODOT)" || { echo "Godot not found. Run 'make setup' first."; exit 1; }
 	$(GODOT) --headless --path client -s res://addons/gdUnit4/bin/GdUnitCmdTool.gd --ignoreHeadlessMode -a res://tests/
@@ -148,13 +192,13 @@ pre-pr-validate: validate-content check-fact-ids
 	@echo "--- Content validation: PASS ---"
 
 pre-pr-fixtures:
-	@echo "Checking fixture staleness..."
+	@echo "Checking Rust->GDScript fixture staleness..."
 	@cd server && cargo test --test gen_fixtures -- --ignored
 	@if git diff --quiet client/tests/fixtures/; then \
-		echo "--- Fixtures: UP TO DATE ---"; \
+		echo "--- Rust fixtures: UP TO DATE ---"; \
 	else \
 		echo ""; \
-		echo "--- FIXTURES STALE ---"; \
+		echo "--- RUST FIXTURES STALE ---"; \
 		echo "  Protocol changed but fixtures not regenerated."; \
 		echo "  Stale fixtures make all client tests FALSE POSITIVES."; \
 		echo ""; \
@@ -164,6 +208,22 @@ pre-pr-fixtures:
 		echo "  Fix: commit the updated fixtures with your protocol change."; \
 		exit 1; \
 	fi
+	@echo "Checking GDScript->Rust fixture staleness..."
+	@$(MAKE) fixtures-client
+	@if git diff --quiet server/tests/fixtures/gdscript/; then \
+		echo "--- GDScript fixtures: UP TO DATE ---"; \
+	else \
+		echo ""; \
+		echo "--- GDSCRIPT FIXTURES STALE ---"; \
+		echo "  Protocol changed but GDScript fixtures not regenerated."; \
+		echo "  Stale fixtures make cross-encoder tests FALSE POSITIVES."; \
+		echo ""; \
+		echo "  Changed files:"; \
+		git diff --stat server/tests/fixtures/gdscript/; \
+		echo ""; \
+		echo "  Fix: commit the updated fixtures with your protocol change."; \
+		exit 1; \
+	fi
 
 # Branch-specific variants (faster, scope-appropriate)
 
@@ -173,7 +233,7 @@ pre-pr-server: lint-server build-server test-server pre-pr-fixtures
 pre-pr-client: lint-client build-client test-client
 	@echo "=== Client pre-PR: PASSED ==="
 
-pre-pr-content: validate-content check-fact-ids
+pre-pr-content: validate-content check-fact-ids checklist-validate
 	@echo "=== Content pre-PR: PASSED ==="
 
 # --- CI (run locally) ---
@@ -214,6 +274,12 @@ validate-content:
 check-fact-ids:
 	@tooling/check-fact-ids
 
+checklist-validate:
+	@tooling/validate-checklist --check
+
+checklist-generate:
+	@tooling/validate-checklist
+
 content-ron:
 	cd tooling/content-converter && cargo build --release
 	tooling/content-converter/target/release/content-converter --input content --output content-ron --verbose
@@ -223,5 +289,5 @@ content-ron:
 clean:
 	cd server && cargo clean || true
 	rm -rf .cache/*
-	rm -rf client/.godot client/reports
+	rm -rf client/.godot/* client/reports
 	@echo "Clean complete."

client/addons/messagepack/messagepack.gd

@@ -87,7 +87,8 @@ static func _encode_message(buffer: StreamPeerBuffer, value):
 			elif 0 <= value and value <= (1 << 32) - 1:
 				buffer.put_u8(types["uint_32"])
 				buffer.put_u32(value)
-			elif - (1 << 63) <= value and value < (1 << 63):
+			elif value < 0:
+				# Negative beyond int_32 range — encode as int_64 (0xd3)
 				buffer.put_u8(types["int_64"])
 				buffer.put_64(value)
 			else:
@@ -133,7 +134,9 @@ static func _encode_message(buffer: StreamPeerBuffer, value):
 				return ERR_INVALID_DATA
 			
 			for obj in value:
-				_encode_message(buffer, obj)
+				var inner_err = _encode_message(buffer, obj)
+				if inner_err:
+					return inner_err
 
 		TYPE_DICTIONARY:
 			var size = value.size()
@@ -150,8 +153,12 @@ static func _encode_message(buffer: StreamPeerBuffer, value):
 				return ERR_INVALID_DATA
 			
 			for key in value:
-				_encode_message(buffer, key)
-				_encode_message(buffer, value[key])
+				var key_err = _encode_message(buffer, key)
+				if key_err:
+					return key_err
+				var val_err = _encode_message(buffer, value[key])
+				if val_err:
+					return val_err
 		
 		TYPE_PACKED_BYTE_ARRAY:
 			var size = value.size()

client/assets/audio/cursor_hover.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://uflbvtm1aquk"
+path="res://.godot/imported/cursor_hover.ogg-f20fa5adecb73cc9163569968f5867a3.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/cursor_hover.ogg"
+dest_files=["res://.godot/imported/cursor_hover.ogg-f20fa5adecb73cc9163569968f5867a3.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/fog_recognition.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://bw0mfil2343po"
+path="res://.godot/imported/fog_recognition.ogg-fd0dc7f57c3509774a533bc71a7687e7.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/fog_recognition.ogg"
+dest_files=["res://.godot/imported/fog_recognition.ogg-fd0dc7f57c3509774a533bc71a7687e7.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/implant_open.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://dei8ikwaqyn67"
+path="res://.godot/imported/implant_open.ogg-46eadc4ed252693e3a936e75ddfdf4bc.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/implant_open.ogg"
+dest_files=["res://.godot/imported/implant_open.ogg-46eadc4ed252693e3a936e75ddfdf4bc.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/sfx_monologue_chime.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://b7iopmg6ftp4k"
+path="res://.godot/imported/sfx_monologue_chime.ogg-5981f28716fbe14273c052560195d890.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/sfx_monologue_chime.ogg"
+dest_files=["res://.godot/imported/sfx_monologue_chime.ogg-5981f28716fbe14273c052560195d890.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/sfx_monologue_chime_urgent.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://4m87qby6qdhc"
+path="res://.godot/imported/sfx_monologue_chime_urgent.ogg-696a4dbc297417724610e01fa44fa575.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/sfx_monologue_chime_urgent.ogg"
+dest_files=["res://.godot/imported/sfx_monologue_chime_urgent.ogg-696a4dbc297417724610e01fa44fa575.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/sfx_stance_change.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://dbu2lr4scswyn"
+path="res://.godot/imported/sfx_stance_change.ogg-042fce976b2bd1b0806c72aa5dd64755.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/sfx_stance_change.ogg"
+dest_files=["res://.godot/imported/sfx_stance_change.ogg-042fce976b2bd1b0806c72aa5dd64755.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/sfx_weapon_aim_lock.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://c5lduxqgx0vme"
+path="res://.godot/imported/sfx_weapon_aim_lock.ogg-649a54b41e9bf6dd8ab414c03bb48cfa.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/sfx_weapon_aim_lock.ogg"
+dest_files=["res://.godot/imported/sfx_weapon_aim_lock.ogg-649a54b41e9bf6dd8ab414c03bb48cfa.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/assets/audio/weapon_aim.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://c2bqso5hkljq1"
+path="res://.godot/imported/weapon_aim.ogg-0bff40b0820b0f9db4c2b0ae2542bfa0.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/weapon_aim.ogg"
+dest_files=["res://.godot/imported/weapon_aim.ogg-0bff40b0820b0f9db4c2b0ae2542bfa0.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4

client/project.godot

@@ -106,6 +106,11 @@ stance_down={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":88,"key_label":0,"unicode":120,"location":0,"echo":false,"script":null)
 ]
 }
+bug_report={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194343,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
 
 [rendering]
 

client/scenes/main.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=17 format=3 uid="uid://bswrmh7w8dbgm"]
+[gd_scene load_steps=19 format=3 uid="uid://bswrmh7w8dbgm"]
 
 [ext_resource type="Script" path="res://scripts/main.gd" id="1_main"]
 [ext_resource type="Script" path="res://scripts/rendering/world_renderer.gd" id="2_world"]
@@ -16,6 +16,8 @@
 [ext_resource type="PackedScene" path="res://ui/world_radial.tscn" id="14_radial"]
 [ext_resource type="PackedScene" path="res://ui/dialogue_box.tscn" id="15_dialogue"]
 [ext_resource type="Script" path="res://scripts/rendering/fog_entities.gd" id="16_fogent"]
+[ext_resource type="PackedScene" path="res://ui/gauntlet_hud.tscn" id="17_gauntlet"]
+[ext_resource type="PackedScene" path="res://ui/bug_report_dialog.tscn" id="18_bugreport"]
 
 [node name="Game" type="Node2D"]
 script = ExtResource("1_main")
@@ -131,6 +133,9 @@ layer = 20
 ; D-053: Stance indicator — top-right, color-coded
 [node name="StanceIndicator" parent="UILayer" instance=ExtResource("13_stance")]
 
+; #496: Gauntlet HUD — room timer + personal bests, hidden in non-gauntlet mode
+[node name="GauntletHUD" parent="UILayer" instance=ExtResource("17_gauntlet")]
+
 ; D-065: Inventory grid — 3x3, bottom-right, 40x40px, 1-9 hotkeys
 [node name="InventoryGrid" parent="UILayer" instance=ExtResource("12_inv")]
 
@@ -140,6 +145,8 @@ script = ExtResource("10_cursor")
 
 ; --- Modal layer (CanvasLayer 30) ---
 ; Full-screen overlays: pause menu, inventory modal, death screen.
-; Empty for Sprint 6 — exists so the layer is reserved in the tree.
 [node name="ModalLayer" type="CanvasLayer" parent="."]
 layer = 30
+
+; #495: WRONG button (F12) — bug report capture dialog
+[node name="BugReportDialog" parent="ModalLayer" instance=ExtResource("18_bugreport")]

client/scripts/autoloads/audio_manager.gd.uid

@@ -0,0 +1 @@
+uid://cdkut8u7sxwmb

client/scripts/autoloads/fog_state.gd.uid

@@ -0,0 +1 @@
+uid://de816lfn5xeqs

client/scripts/autoloads/game_state.gd

@@ -36,6 +36,10 @@ var current_dialogue: Variant = null  # {npc_name, npc_entity_id, speech, option
 # InputMapper suppresses movement when this is true.
 var dialogue_active: bool = false
 
+# v8 fields (#496): Gauntlet mode — room timer + personal bests
+var room_id: Variant = null  # String room_id from snapshot, null in non-gauntlet mode
+var gauntlet_mode: bool = false  # true when snapshot includes gauntlet_mode flag
+
 # v7 fields (#431, D-059/D-060)
 var pending_recognitions: Array = []  # [{entity_id, x, y, z, remaining_ticks, total_delay_ticks}]
 
@@ -118,6 +122,16 @@ func apply_snapshot(snapshot: Dictionary) -> void:
 	else:
 		pending_recognitions = []
 
+	# v8: gauntlet mode (#496) — room_id and gauntlet_mode
+	if snapshot.has("gauntlet_mode") and snapshot.gauntlet_mode == true:
+		gauntlet_mode = true
+	else:
+		gauntlet_mode = false
+	if snapshot.has("room_id") and snapshot.room_id is String:
+		room_id = snapshot.room_id
+	else:
+		room_id = null
+
 	# v2: visible_tiles with visibility sectors
 	# Derives visible_positions when not explicitly provided (real server mode)
 	if snapshot.has("visible_tiles") and snapshot.visible_tiles is Array and snapshot.visible_tiles.size() > 0:

client/scripts/autoloads/input_mapper.gd

@@ -14,6 +14,7 @@ enum Action {
 	MOVE_SOUTH, MOVE_SOUTHWEST, MOVE_WEST, MOVE_NORTHWEST,
 	INTERACT, USE_PERCEPTION_MODE, OPEN_MENU, PAUSE, UNPAUSE,
 	TOGGLE_STANCE_UP, TOGGLE_STANCE_DOWN,
+	BUG_REPORT,  # #495: F12 WRONG button — client-only, not sent to server
 }
 
 var input_queue: Array[Dictionary] = []
@@ -74,6 +75,8 @@ func _unhandled_input(event: InputEvent) -> void:
 		action = Action.TOGGLE_STANCE_UP
 	elif event.is_action_pressed("stance_down"):
 		action = Action.TOGGLE_STANCE_DOWN
+	elif event.is_action_pressed("bug_report"):
+		action = Action.BUG_REPORT
 
 	if action != -1:
 		input_queue.append({

client/scripts/autoloads/sim_bridge.gd

@@ -255,9 +255,9 @@ static func _action_enum_to_wire(action: int) -> String:
 		InputMapper.Action.TOGGLE_STANCE_UP: return "ToggleStanceUp"
 		InputMapper.Action.TOGGLE_STANCE_DOWN: return "ToggleStanceDown"
 		InputMapper.Action.OPEN_MENU:
-			# Client-only action, not part of wire protocol
-			push_warning("SimBridge: OPEN_MENU is client-only, not sent to server")
-			return ""
+			return ""  # Client-only action, not part of wire protocol
+		InputMapper.Action.BUG_REPORT:
+			return ""  # Client-only action (#495), not part of wire protocol
 		_:
 			push_warning("SimBridge: unknown action enum %s" % action)
 			return ""

client/scripts/main.gd

@@ -12,6 +12,8 @@ extends Node2D
 @onready var inventory_grid = $UILayer/InventoryGrid  # D-065: z-layer 7
 @onready var stance_indicator = $UILayer/StanceIndicator  # D-053: z-layer 7
 @onready var cursor_renderer = $UILayer/CursorRenderer  # D-056: z-layer 7
+@onready var gauntlet_hud = $UILayer/GauntletHUD  # #496: room timer + personal bests
+@onready var bug_report_dialog = $ModalLayer/BugReportDialog  # #495: F12 WRONG button
 
 var _last_dialogue_npc_id: int = -1  # D-064: NPC entity_id for WalkAway input
 var _camera_anchored: bool = false
@@ -49,6 +51,10 @@ func _ready() -> void:
 		dialogue_box.dialogue_dismissed.connect(_on_dialogue_dismissed)
 		dialogue_box.confrontation_monologue.connect(_on_confrontation_monologue)
 
+	# #496: Print gauntlet session summary on disconnect
+	if gauntlet_hud:
+		SimBridge.connection_state_changed.connect(_on_connection_state_changed)
+
 
 func _process(_delta: float) -> void:
 	# Main game loop: poll snapshot, apply state, flush input
@@ -88,6 +94,10 @@ func _process(_delta: float) -> void:
 		if fog_entities and fog_entities.has_method("update_from_state"):
 			fog_entities.update_from_state()
 
+		# #496: Update gauntlet HUD (room timer + personal bests)
+		if gauntlet_hud and gauntlet_hud.has_method("update_from_state"):
+			gauntlet_hud.update_from_state()
+
 		# Show monologue if server sent one this tick (#414)
 		_consume_monologue()
 
@@ -109,6 +119,11 @@ func _process(_delta: float) -> void:
 	# Send queued input to simulation
 	var inputs = InputMapper.flush_queue()
 	for input in inputs:
+		# #495: F12 WRONG button — client-only, trigger bug report capture
+		if input.action == InputMapper.Action.BUG_REPORT:
+			if bug_report_dialog and not bug_report_dialog.is_active():
+				bug_report_dialog.start_capture()
+			continue
 		if input.action == InputMapper.Action.INTERACT:
 			# D-057: prefer interaction list (multi-verb), fall back to prompt (v0.1)
 			var target_id: int = -1
@@ -197,3 +212,9 @@ func _on_dialogue_dismissed() -> void:
 			"verb": "WalkAway",
 		},
 	})
+
+
+# #496: Finalize gauntlet stats on disconnect
+func _on_connection_state_changed(old_state: SimBridge.ConnectionState, new_state: SimBridge.ConnectionState) -> void:
+	if new_state == SimBridge.ConnectionState.DISCONNECTED and gauntlet_hud:
+		gauntlet_hud.finalize()

client/scripts/rendering/cursor_renderer.gd.uid

@@ -0,0 +1 @@
+uid://bkbfcalfo1kk8

client/scripts/rendering/fog_entities.gd.uid

@@ -0,0 +1 @@
+uid://cw154tgjdyhe1

client/scripts/rendering/fog_shader.gd.uid

@@ -0,0 +1 @@
+uid://dje4vilxh5xxu

client/shaders/fog.gdshader.uid

@@ -0,0 +1 @@
+uid://bcc1wwpk3moh1

client/tests/gen_client_fixtures.gd

@@ -0,0 +1,173 @@
+## Generate MessagePack fixtures from GDScript encoder for Rust decoder testing.
+## Run with: make fixtures-client
+## (or: godot --headless --path client -s res://tests/gen_client_fixtures.gd)
+##
+## Reverse direction of server/tests/gen_fixtures.rs: GDScript encodes -> Rust decodes.
+## Together with the Rust-generated fixtures, this closes the cross-encoder
+## compatibility loop (D-030 Layer 1, #475).
+##
+## Loads Messagepack encoder directly (not via class_name) because -s scripts
+## run before the project's class_name registry is fully populated.
+extends SceneTree
+
+var _Msgpack: GDScript
+var _count := 0
+var _errors := 0
+var _output_dir: String
+
+
+func _init():
+	_run.call_deferred()
+
+
+func _run():
+	_Msgpack = load("res://addons/messagepack/messagepack.gd")
+
+	# Resolve repo root from Godot project root (client/).
+	# Assumes client/ is one level below repo root — validated below.
+	var project_root := ProjectSettings.globalize_path("res://")
+	var repo_root := project_root.rstrip("/").get_base_dir()
+	_output_dir = repo_root.path_join("server/tests/fixtures/gdscript")
+
+	if not DirAccess.dir_exists_absolute(repo_root.path_join("server")):
+		push_error("Repo root detection failed: %s/server/ does not exist" % repo_root)
+		quit(1)
+		return
+
+	DirAccess.make_dir_recursive_absolute(_output_dir)
+
+	_generate_inputs()
+	_generate_boundary_inputs()
+	_generate_batch()
+
+	if _errors > 0:
+		push_error("FAILED: %d encode errors encountered" % _errors)
+		quit(1)
+		return
+	if _count == 0:
+		push_error("FAILED: no fixtures generated")
+		quit(1)
+		return
+	print("Generated %d GDScript fixtures at %s" % [_count, _output_dir])
+	quit()
+
+
+func _write_fixture(name: String, bytes: PackedByteArray) -> void:
+	if bytes.is_empty():
+		push_error("Encode produced empty bytes for fixture: %s" % name)
+		_errors += 1
+		return
+	var path := _output_dir.path_join(name + ".msgpack")
+	var file := FileAccess.open(path, FileAccess.WRITE)
+	if file == null:
+		push_error("Failed to write fixture: %s (error: %d)" % [path, FileAccess.get_open_error()])
+		_errors += 1
+		return
+	file.store_buffer(bytes)
+	file.flush()
+	file.close()
+	print("  Wrote %s (%d bytes)" % [name, bytes.size()])
+	_count += 1
+
+
+## Encode a single PlayerInput to MessagePack bytes.
+## Mirrors Protocol.encode_player_input() from protocol.gd.
+func _encode_input(tick: int, action_name: String, action_data: Variant = null) -> PackedByteArray:
+	var action: Variant
+	if action_data != null:
+		action = {action_name: action_data}
+	elif action_name == "Interact":
+		action = {"Interact": {"target_entity_id": null, "verb": null}}
+	else:
+		action = action_name
+
+	var result = _Msgpack.encode({"tick": tick, "action": action})
+	if result.status != null:
+		push_error("Encode failed: %s" % result.status)
+		return PackedByteArray()
+	return result.value
+
+
+## Encode an array of PlayerInputs to MessagePack bytes.
+## Mirrors Protocol.encode_player_inputs() from protocol.gd.
+func _encode_inputs(inputs: Array) -> PackedByteArray:
+	var wire_inputs: Array = []
+	for input in inputs:
+		var action_name: String = input["action_name"]
+		var action_data: Variant = input.get("action_data")
+		var action: Variant
+		if action_data != null:
+			action = {action_name: action_data}
+		elif action_name == "Interact":
+			action = {"Interact": {"target_entity_id": null, "verb": null}}
+		else:
+			action = action_name
+		wire_inputs.append({"tick": input["tick"], "action": action})
+
+	var result = _Msgpack.encode(wire_inputs)
+	if result.status != null:
+		push_error("Batch encode failed: %s" % result.status)
+		return PackedByteArray()
+	return result.value
+
+
+func _generate_inputs() -> void:
+	# Unit variants: all 8 movement directions (tick=100)
+	for dir_name in [
+		"MoveNorth", "MoveSouth", "MoveEast", "MoveWest",
+		"MoveNortheast", "MoveSoutheast", "MoveSouthwest", "MoveNorthwest",
+	]:
+		_write_fixture("input_%s" % dir_name.to_snake_case(),
+			_encode_input(100, dir_name))
+
+	# Data variant: UsePerceptionMode (tick=200)
+	_write_fixture("input_perception_mode",
+		_encode_input(200, "UsePerceptionMode", "thermal"))
+
+	# Struct variant: Interact with null fields (tick=100)
+	_write_fixture("input_interact",
+		_encode_input(100, "Interact"))
+
+	# Other unit variants
+	_write_fixture("input_pause",
+		_encode_input(100, "Pause"))
+	_write_fixture("input_unpause",
+		_encode_input(100, "Unpause"))
+	_write_fixture("input_toggle_stance_up",
+		_encode_input(100, "ToggleStanceUp"))
+	_write_fixture("input_toggle_stance_down",
+		_encode_input(100, "ToggleStanceDown"))
+	_write_fixture("input_walk_away",
+		_encode_input(100, "WalkAway"))
+
+
+func _generate_boundary_inputs() -> void:
+	# Tick values at MessagePack encoding format boundaries.
+	# GDScript encodes 256-32767 as int_16 (0xd1); Rust encodes as uint_16 (0xcd).
+	# GDScript encodes 65536-2147483647 as int_32 (0xd2); Rust as uint_32 (0xce).
+	# Both are valid MessagePack. Rust's rmp_serde must accept both.
+	var boundary_ticks: Array = [
+		[0, "boundary_tick_0"],
+		[127, "boundary_tick_127"],
+		[128, "boundary_tick_128"],
+		[255, "boundary_tick_255"],
+		[256, "boundary_tick_256"],                    # int_16 asymmetry start
+		[32767, "boundary_tick_32767"],                # int_16 asymmetry end
+		[32768, "boundary_tick_32768"],
+		[65535, "boundary_tick_65535"],
+		[65536, "boundary_tick_65536"],                # int_32 asymmetry start
+		[2147483647, "boundary_tick_2147483647"],      # int_32 asymmetry end
+	]
+
+	for pair in boundary_ticks:
+		_write_fixture(pair[1],
+			_encode_input(pair[0], "Pause"))
+
+
+func _generate_batch() -> void:
+	# Vec<PlayerInput> with two actions (mirrors Rust input_batch_two fixture)
+	_write_fixture("input_batch_two",
+		_encode_inputs([
+			{"tick": 0, "action_name": "MoveNorth"},
+			{"tick": 0, "action_name": "Interact"},
+		]))

client/tests/gen_client_fixtures.gd.uid

@@ -0,0 +1 @@
+uid://njychcgqlvtv

client/tests/test_anti_tedium.gd

@@ -0,0 +1,612 @@
+## Anti-tedium regression tests (#494):
+## Guard against UI clutter that makes testing tedious.
+##
+## Test 1: F12 bug report capture — pressing F12 must not crash; when #495 lands,
+##         the handler should pause, show capture dialog, save 3 files, unpause.
+## Test 2: Gauntlet progress UI hidden — in non-Gauntlet mode (no room_id or
+##         gauntlet_mode flag in snapshot), timer and personal-bests must not appear.
+##
+## #495 blocked by #481/#490 (server). #496 blocked by #487 (server).
+## Tests stub blocked features and verify anti-tedium guards.
+## Spec ref: Sprint 9 briefing (client.md), #495, #496.
+class_name TestAntiTedium
+extends GdUnitTestSuite
+
+
+var _instance: Node = null
+var GauntletHUDScript = load("res://ui/gauntlet_hud.gd")
+var BugReportDialogScript = load("res://ui/bug_report_dialog.gd")
+
+
+func before_test() -> void:
+	SimBridge.reset_test_state()
+	SimBridge._last_snapshot = null
+	GameState.current_tick = 0
+	GameState.player_position = Vector2.ZERO
+	GameState.visible_entities = []
+	GameState.visible_tiles = []
+	GameState.visible_positions = {}
+	GameState.current_monologue = null
+	GameState.current_dialogue = null
+	GameState.game_time = {}
+	GameState.pending_recognitions = []
+	GameState.room_id = null
+	GameState.gauntlet_mode = false
+
+
+func after_test() -> void:
+	if _instance and is_instance_valid(_instance):
+		_instance.queue_free()
+		_instance = null
+
+
+# -- Helpers -------------------------------------------------------------------
+
+## Encode a minimal valid snapshot as MessagePack bytes (same helper as P0 tests).
+func _make_snapshot_bytes(overrides: Dictionary = {}) -> PackedByteArray:
+	var snapshot := {
+		"tick": overrides.get("tick", 1),
+		"version": Protocol.PROTOCOL_VERSION,
+		"entities": overrides.get("entities", [{
+			"entity_id": 1,
+			"x": 10.0,
+			"y": 10.0,
+			"z": 0,
+			"kind": "Player",
+			"visibility": "Forward",
+		}]),
+		"game_time": {
+			"day": 0,
+			"time_of_day": 0,
+			"day_phase": "Morning",
+			"tick_rate": overrides.get("tick_rate", "Full"),
+		},
+		"player_facing": "North",
+		"player_stance": "Walk",
+		"player_inventory": [],
+		"visible_tiles": [],
+		"nearby_interactions": [],
+		"pending_recognitions": [],
+	}
+	if overrides.has("current_monologue"):
+		snapshot["current_monologue"] = overrides["current_monologue"]
+	if overrides.has("current_dialogue"):
+		snapshot["current_dialogue"] = overrides["current_dialogue"]
+	# Gauntlet fields: only include if explicitly provided (absence = non-gauntlet)
+	if overrides.has("room_id"):
+		snapshot["room_id"] = overrides["room_id"]
+	if overrides.has("gauntlet_mode"):
+		snapshot["gauntlet_mode"] = overrides["gauntlet_mode"]
+	var result = Messagepack.encode(snapshot)
+	return result.value
+
+
+func _make_gauntlet_hud() -> Control:
+	var hud = Control.new()
+	hud.set_script(GauntletHUDScript)
+	auto_free(hud)
+	add_child(hud)
+	hud._personal_bests = {}  # Clear any stats loaded from disk
+	return hud
+
+
+func _make_bug_report_dialog() -> Control:
+	var dialog = Control.new()
+	dialog.set_script(BugReportDialogScript)
+	auto_free(dialog)
+	add_child(dialog)
+	return dialog
+
+
+# -- Test 1: F12 Bug Report Capture -------------------------------------------
+# #495: BUG_REPORT action triggers the WRONG button capture flow.
+# Verifies: dialog exists, activates on action, no state corruption.
+# Note: Input.parse_input_event + _unhandled_input is unreliable in headless
+# test mode. Tests drive the input queue directly for deterministic coverage.
+
+func test_bug_report_dialog_exists_in_scene() -> void:
+	# Verify the BugReportDialog node is present and hidden by default.
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+	_instance._process(0.016)
+
+	var dialog: Node = _find_node_recursive(_instance, "BugReportDialog")
+	assert_that(dialog).override_failure_message(
+		"BugReportDialog node should exist in scene tree"
+	).is_not_null()
+	if dialog is CanvasItem:
+		assert_that((dialog as CanvasItem).visible).override_failure_message(
+			"BugReportDialog should be hidden by default"
+		).is_false()
+
+
+func test_bug_report_activates_on_action() -> void:
+	# Inject BUG_REPORT action directly into the queue and verify main.gd
+	# triggers the dialog. This tests the full main._process() handling path.
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+	_instance._process(0.016)
+
+	# Record baseline state
+	var mono_before: Variant = GameState.current_monologue
+	var dialogue_before: Variant = GameState.current_dialogue
+
+	# Inject BUG_REPORT action into InputMapper queue
+	InputMapper.input_queue.append({
+		"action": InputMapper.Action.BUG_REPORT,
+		"timestamp_msec": Time.get_ticks_msec(),
+	})
+
+	# Process a frame — main.gd flushes the queue and triggers dialog
+	_instance._process(0.016)
+
+	# Assert: dialog should be active
+	var dialog: Node = _find_node_recursive(_instance, "BugReportDialog")
+	assert_that(dialog).is_not_null()
+	if dialog and dialog.has_method("is_active"):
+		assert_that(dialog.is_active()).override_failure_message(
+			"BugReportDialog should be active after BUG_REPORT action"
+		).is_true()
+
+	# Assert: no unintended state corruption
+	assert_that(GameState.current_monologue).override_failure_message(
+		"BUG_REPORT should not spawn a monologue"
+	).is_equal(mono_before)
+	assert_that(GameState.current_dialogue).override_failure_message(
+		"BUG_REPORT should not spawn a dialogue"
+	).is_equal(dialogue_before)
+
+
+# -- Test 2: Gauntlet Progress UI Hidden in Non-Gauntlet Mode -----------------
+# When #496 lands, it adds a room timer and personal-bests overlay.
+# Anti-tedium guard: these must NOT be visible in normal (non-Gauntlet) play.
+#
+# Current state: no gauntlet UI exists in the scene tree.
+# This test guards against #496 accidentally showing gauntlet UI in all modes.
+
+func test_no_gauntlet_ui_visible_in_default_mode() -> void:
+	# Load main scene — represents non-Gauntlet (default) play mode
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+
+	# Process one frame to initialize all children
+	_instance._process(0.016)
+
+	# Check that no gauntlet-specific UI nodes are visible in the scene tree.
+	# When #496 adds GauntletHUD/RoomTimer/PersonalBests, they must be hidden
+	# by default (only shown when gauntlet_mode is true in the snapshot).
+	var gauntlet_node_names := [
+		"GauntletHUD", "RoomTimer", "PersonalBests", "GauntletOverlay",
+		"GauntletTimer", "GauntletProgress",
+	]
+	for node_name in gauntlet_node_names:
+		var node: Node = _find_node_recursive(_instance, node_name)
+		if node != null and node is CanvasItem:
+			assert_that((node as CanvasItem).visible).override_failure_message(
+				"Gauntlet UI node '%s' must not be visible in non-Gauntlet mode" % node_name
+			).is_false()
+
+
+func test_snapshot_without_room_id_shows_no_gauntlet_ui() -> void:
+	# A snapshot that lacks room_id and gauntlet_mode fields represents
+	# normal play. Apply it and verify no gauntlet state leaks into GameState.
+	var bytes := _make_snapshot_bytes({"tick": 1})
+	SimBridge.receive_bytes(bytes)
+
+	var snapshot: Variant = SimBridge._last_snapshot
+	assert_that(snapshot).is_not_null()
+
+	# Snapshot should NOT contain gauntlet fields
+	assert_that(snapshot.has("room_id")).override_failure_message(
+		"Non-gauntlet snapshot must not contain room_id"
+	).is_false()
+	assert_that(snapshot.has("gauntlet_mode")).override_failure_message(
+		"Non-gauntlet snapshot must not contain gauntlet_mode"
+	).is_false()
+
+	# Apply to GameState — gauntlet-related state should not exist
+	GameState.apply_snapshot(snapshot)
+	# #496: GameState now has room_id (Variant, null) and gauntlet_mode (bool, false).
+	# A non-gauntlet snapshot must leave these at their defaults.
+	assert_that(GameState.room_id).override_failure_message(
+		"GameState.room_id should be null in non-gauntlet mode"
+	).is_null()
+	assert_that(GameState.gauntlet_mode).override_failure_message(
+		"GameState.gauntlet_mode should be false in non-gauntlet mode"
+	).is_false()
+
+
+func test_gauntlet_ui_stays_hidden_after_multiple_snapshots() -> void:
+	# Simulate several ticks of normal play — gauntlet UI must never appear.
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+
+	# Process 5 frames with normal (non-gauntlet) snapshots
+	for tick in range(1, 6):
+		var bytes := _make_snapshot_bytes({"tick": tick})
+		SimBridge.receive_bytes(bytes)
+		_instance._process(0.016)
+
+	# After 5 frames, no gauntlet nodes should have appeared
+	var gauntlet_node_names := [
+		"GauntletHUD", "RoomTimer", "PersonalBests", "GauntletOverlay",
+		"GauntletTimer", "GauntletProgress",
+	]
+	for node_name in gauntlet_node_names:
+		var node: Node = _find_node_recursive(_instance, node_name)
+		if node != null and node is CanvasItem:
+			assert_that((node as CanvasItem).visible).override_failure_message(
+				"Gauntlet UI '%s' must stay hidden after %d non-gauntlet ticks" % [node_name, 5]
+			).is_false()
+
+
+# -- GauntletHUD Feature Tests (#496) ----------------------------------------
+# Timer lifecycle, personal bests, room change, visibility.
+# Spec: sprint-9/client.md #496. Ticket: db/connectors/ticket show 496.
+
+func test_format_time_zero() -> void:
+	# Static utility: 0 seconds → "00:00"
+	var hud := _make_gauntlet_hud()
+	assert_that(hud._format_time(0.0)).is_equal("00:00")
+
+
+func test_format_time_sub_minute() -> void:
+	# 47.9 seconds (truncates, no rounding) → "00:47"
+	var hud := _make_gauntlet_hud()
+	assert_that(hud._format_time(47.9)).is_equal("00:47")
+
+
+func test_format_time_over_minute() -> void:
+	# 98.3 seconds → 1 min 38 sec → "01:38"
+	var hud := _make_gauntlet_hud()
+	assert_that(hud._format_time(98.3)).is_equal("01:38")
+
+
+func test_gauntlet_hud_shows_when_gauntlet_mode_active() -> void:
+	# HUD must become visible when gauntlet_mode is true in the snapshot.
+	var hud := _make_gauntlet_hud()
+	assert_that(hud.visible).is_false()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	assert_that(hud.visible).override_failure_message(
+		"GauntletHUD must be visible when gauntlet_mode is true"
+	).is_true()
+
+
+func test_gauntlet_hud_hides_when_gauntlet_mode_deactivates() -> void:
+	# HUD must hide when gauntlet_mode transitions from true to false.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	assert_that(hud.visible).is_true()
+	# Switch to non-gauntlet
+	GameState.gauntlet_mode = false
+	GameState.room_id = null
+	hud.update_from_state()
+	assert_that(hud.visible).override_failure_message(
+		"GauntletHUD must hide when gauntlet_mode becomes false"
+	).is_false()
+
+
+func test_gauntlet_hud_timer_starts_on_room_entry() -> void:
+	# Timer starts running and tracks room_id after room entry.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	assert_that(hud.is_timer_running()).override_failure_message(
+		"Timer should be running after room entry"
+	).is_true()
+	assert_that(hud.get_current_room_id()).is_equal("room_1")
+
+
+func test_gauntlet_hud_timer_increments_with_delta() -> void:
+	# Timer accumulates real time via _process(delta).
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(0.5)
+	assert_that(hud.get_timer_seconds()).override_failure_message(
+		"Timer should increment by delta (0.5s)"
+	).is_equal_approx(0.5, 0.01)
+	hud._process(1.0)
+	assert_that(hud.get_timer_seconds()).override_failure_message(
+		"Timer should accumulate (0.5 + 1.0 = 1.5s)"
+	).is_equal_approx(1.5, 0.01)
+
+
+func test_gauntlet_hud_timer_resets_on_room_change() -> void:
+	# Changing room_id resets the timer to 0 and starts counting for the new room.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(5.0)
+	assert_that(hud.get_timer_seconds() > 4.0).is_true()
+	# Change room
+	GameState.room_id = "room_2"
+	hud.update_from_state()
+	assert_that(hud.get_timer_seconds()).override_failure_message(
+		"Timer should reset to 0 on room change"
+	).is_equal_approx(0.0, 0.01)
+	assert_that(hud.get_current_room_id()).is_equal("room_2")
+	assert_that(hud.is_timer_running()).is_true()
+
+
+func test_gauntlet_hud_records_personal_best() -> void:
+	# Completing a room (by entering a new room) records a personal best.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(10.0)
+	# Entering room_2 triggers _record_room_completion for room_1
+	GameState.room_id = "room_2"
+	hud.update_from_state()
+	assert_that(hud.get_personal_best("room_1")).override_failure_message(
+		"PB for room_1 should be ~10.0s after first completion"
+	).is_equal_approx(10.0, 0.1)
+
+
+func test_gauntlet_hud_non_pb_does_not_overwrite() -> void:
+	# A worse time must not overwrite an existing personal best.
+	var hud := _make_gauntlet_hud()
+	hud._personal_bests["room_1"] = 5.0  # Existing PB of 5 seconds
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(10.0)  # Worse time than existing PB
+	GameState.room_id = "room_2"
+	hud.update_from_state()
+	assert_that(hud.get_personal_best("room_1")).override_failure_message(
+		"PB should remain 5.0 when new time (10.0) is worse"
+	).is_equal_approx(5.0, 0.01)
+
+
+func test_gauntlet_hud_pb_overwrites_when_faster() -> void:
+	# A faster time must overwrite an existing personal best.
+	var hud := _make_gauntlet_hud()
+	hud._personal_bests["room_1"] = 15.0  # Existing PB of 15 seconds
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(8.0)  # Better time
+	GameState.room_id = "room_2"
+	hud.update_from_state()
+	assert_that(hud.get_personal_best("room_1")).override_failure_message(
+		"PB should update to 8.0 when new time beats old PB (15.0)"
+	).is_equal_approx(8.0, 0.1)
+
+
+func test_gauntlet_hud_null_room_in_gauntlet_mode() -> void:
+	# Gauntlet mode active but no room_id yet — HUD visible, timer stopped.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = null
+	hud.update_from_state()
+	assert_that(hud.visible).override_failure_message(
+		"HUD should be visible in gauntlet mode even without room_id"
+	).is_true()
+	assert_that(hud.is_timer_running()).override_failure_message(
+		"Timer should NOT run when room_id is null"
+	).is_false()
+
+
+func test_gauntlet_hud_timer_paused_when_not_visible() -> void:
+	# Timer should not accumulate when HUD is not visible (non-gauntlet mode).
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(2.0)
+	assert_that(hud.get_timer_seconds()).is_equal_approx(2.0, 0.01)
+	# Switch to non-gauntlet (hides HUD)
+	GameState.gauntlet_mode = false
+	hud.update_from_state()
+	hud._process(5.0)  # Should NOT accumulate
+	assert_that(hud.get_timer_seconds()).override_failure_message(
+		"Timer must not accumulate when HUD is hidden"
+	).is_equal_approx(2.0, 0.01)
+
+
+func test_gauntlet_hud_finalize_records_current_room() -> void:
+	# finalize() records the current room's time and stops the timer.
+	# Called on disconnect via _on_connection_state_changed.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(7.5)
+	hud.finalize()
+	assert_that(hud.is_timer_running()).override_failure_message(
+		"Timer should stop after finalize"
+	).is_false()
+	assert_that(hud.get_personal_best("room_1")).override_failure_message(
+		"Finalize should record current room's time as PB"
+	).is_equal_approx(7.5, 0.1)
+
+
+func test_gauntlet_hud_session_tracks_attempts() -> void:
+	# Each room entry increments the attempt counter in _session_rooms.
+	var hud := _make_gauntlet_hud()
+	GameState.gauntlet_mode = true
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	hud._process(3.0)
+	# Re-enter same room (via room change and back)
+	GameState.room_id = "room_2"
+	hud.update_from_state()
+	GameState.room_id = "room_1"
+	hud.update_from_state()
+	assert_that(hud._session_rooms.has("room_1")).is_true()
+	assert_that(hud._session_rooms["room_1"]["attempts"]).override_failure_message(
+		"Room should show 2 attempts after two entries"
+	).is_equal(2)
+
+
+func test_gauntlet_snapshot_roundtrip_via_apply() -> void:
+	# Snapshot with gauntlet fields applied to GameState, consumed by HUD.
+	# End-to-end: bytes → decode → apply → update_from_state.
+	var bytes := _make_snapshot_bytes({
+		"tick": 10,
+		"gauntlet_mode": true,
+		"room_id": "warehouse_01",
+	})
+	SimBridge.receive_bytes(bytes)
+	GameState.apply_snapshot(SimBridge._last_snapshot)
+	assert_that(GameState.gauntlet_mode).is_true()
+	assert_that(GameState.room_id).is_equal("warehouse_01")
+	var hud := _make_gauntlet_hud()
+	hud.update_from_state()
+	assert_that(hud.visible).is_true()
+	assert_that(hud.get_current_room_id()).is_equal("warehouse_01")
+	assert_that(hud.is_timer_running()).is_true()
+
+
+# -- BugReportDialog Feature Tests (#495) ------------------------------------
+# Pause/unpause lifecycle, wire guard, text render, state machine.
+# Spec: sprint-9/client.md #495. Ticket: db/connectors/ticket show 495.
+
+func test_bug_report_sends_pause_on_open() -> void:
+	# start_capture() must send Pause to the server.
+	SimBridge.connect_to_sim()
+	SimBridge._test_input_queue.clear()
+	var dialog := _make_bug_report_dialog()
+	dialog.start_capture()
+	assert_that(dialog.is_active()).is_true()
+	assert_that(SimBridge._test_input_queue.has("Pause")).override_failure_message(
+		"Opening bug report should send Pause to server"
+	).is_true()
+
+
+func test_bug_report_sends_unpause_on_close() -> void:
+	# _close() must send Unpause to the server.
+	SimBridge.connect_to_sim()
+	var dialog := _make_bug_report_dialog()
+	dialog.start_capture()
+	SimBridge._test_input_queue.clear()
+	dialog._close()
+	assert_that(dialog.is_active()).is_false()
+	assert_that(SimBridge._test_input_queue.has("Unpause")).override_failure_message(
+		"Closing bug report should send Unpause to server"
+	).is_true()
+
+
+func test_bug_report_not_double_activatable() -> void:
+	# Calling start_capture() twice must not double-activate or send duplicate Pause.
+	SimBridge.connect_to_sim()
+	var dialog := _make_bug_report_dialog()
+	dialog.start_capture()
+	assert_that(dialog.is_active()).is_true()
+	SimBridge._test_input_queue.clear()
+	dialog.start_capture()  # Second call — should be blocked
+	assert_that(SimBridge._test_input_queue.size()).override_failure_message(
+		"Double-activation should be blocked (no second Pause sent)"
+	).is_equal(0)
+
+
+func test_bug_report_action_not_on_wire() -> void:
+	# BUG_REPORT is client-only — must not produce a wire-format action name.
+	var wire_name := SimBridge._action_enum_to_wire(InputMapper.Action.BUG_REPORT)
+	assert_that(wire_name).override_failure_message(
+		"BUG_REPORT must not produce a wire action name (client-only)"
+	).is_equal("")
+
+
+func test_bug_report_render_text_contains_tick_and_entities() -> void:
+	# _render_snapshot_text() must include tick number and entity data from GameState.
+	GameState.current_tick = 42
+	GameState.player_position = Vector2(5.0, 7.0)
+	GameState.player_facing = "South"
+	GameState.player_stance = "Crouch"
+	GameState.visible_entities = [{
+		"entity_id": 1, "x": 5.0, "y": 7.0, "z": 0,
+		"kind": {"variant": "Player", "data": null}, "visibility": "Forward",
+	}]
+	GameState.visible_tiles = []
+	GameState.game_time = {"day": 1, "day_phase": "Evening", "tick_rate": "Full"}
+	GameState.current_monologue = null
+	GameState.current_dialogue = null
+	var dialog := _make_bug_report_dialog()
+	var text: String = dialog._render_snapshot_text()
+	assert_that(text.contains("t42")).override_failure_message(
+		"Render text should contain tick number"
+	).is_true()
+	assert_that(text.contains("Entities (1)")).override_failure_message(
+		"Render text should show entity count"
+	).is_true()
+	assert_that(text.contains("Player")).override_failure_message(
+		"Render text should contain entity kind"
+	).is_true()
+	assert_that(text.contains("South")).override_failure_message(
+		"Render text should contain player facing"
+	).is_true()
+
+
+func test_bug_report_render_text_with_monologue_and_dialogue() -> void:
+	# _render_snapshot_text() should include active monologue and dialogue.
+	GameState.current_tick = 10
+	GameState.player_position = Vector2(3.0, 3.0)
+	GameState.player_facing = "North"
+	GameState.player_stance = "Walk"
+	GameState.visible_entities = []
+	GameState.visible_tiles = []
+	GameState.game_time = {"day": 0, "day_phase": "Morning", "tick_rate": "Full"}
+	GameState.current_monologue = {"text": "Something is wrong here."}
+	GameState.current_dialogue = {"npc_name": "Kael", "speech": "Who are you?"}
+	var dialog := _make_bug_report_dialog()
+	var text: String = dialog._render_snapshot_text()
+	assert_that(text.contains("Something is wrong here.")).override_failure_message(
+		"Render text should include monologue text"
+	).is_true()
+	assert_that(text.contains("Kael")).override_failure_message(
+		"Render text should include dialogue NPC name"
+	).is_true()
+	assert_that(text.contains("Who are you?")).override_failure_message(
+		"Render text should include dialogue speech"
+	).is_true()
+
+
+func test_bug_report_render_text_empty_snapshot() -> void:
+	# Edge case: F12 pressed before any snapshot data arrives.
+	GameState.current_tick = 0
+	GameState.player_position = Vector2.ZERO
+	GameState.player_facing = "North"
+	GameState.player_stance = "Walk"
+	GameState.visible_entities = []
+	GameState.visible_tiles = []
+	GameState.game_time = {}
+	GameState.current_monologue = null
+	GameState.current_dialogue = null
+	var dialog := _make_bug_report_dialog()
+	var text: String = dialog._render_snapshot_text()
+	# Should not crash, should produce some output
+	assert_that(text.length() > 0).override_failure_message(
+		"Render text should not be empty even with no snapshot data"
+	).is_true()
+	assert_that(text.contains("Entities (0)")).override_failure_message(
+		"Empty snapshot should show 0 entities"
+	).is_true()
+
+
+# -- Helper: recursive node search --------------------------------------------
+
+func _find_node_recursive(root: Node, target_name: String) -> Node:
+	if root.name == target_name:
+		return root
+	for child in root.get_children():
+		var found := _find_node_recursive(child, target_name)
+		if found != null:
+			return found
+	return null

client/tests/test_anti_tedium.gd.uid

@@ -0,0 +1 @@
+uid://d3fj584itowcl

client/tests/test_camera_anchor.gd.uid

@@ -0,0 +1 @@
+uid://vw0iqhai1kum

client/tests/test_client_p1.gd.uid

@@ -0,0 +1 @@
+uid://cw0yyp8mrchi7

client/tests/test_client_p2.gd

@@ -0,0 +1,320 @@
+## P2 client tests: camera (5), entity alpha/color (4), UI (7).
+## Validates camera tracking, entity visual state, and UI component lifecycle.
+## Spec ref: sprint-9/client.md #492.
+class_name TestClientP2
+extends GdUnitTestSuite
+
+var EntityRendererScript = load("res://scripts/rendering/entity_renderer.gd")
+var FogEntitiesScript = load("res://scripts/rendering/fog_entities.gd")
+
+var _instance: Node = null
+
+
+func before_test() -> void:
+	SimBridge.reset_test_state()
+	SimBridge._last_snapshot = null
+	GameState.current_tick = 0
+	GameState.player_position = Vector2.ZERO
+	GameState.visible_entities = []
+	GameState.visible_tiles = []
+	GameState.visible_positions = {}
+	GameState.current_monologue = null
+	GameState.current_dialogue = null
+	GameState.game_time = {}
+	GameState.pending_recognitions = []
+	GameState.nearby_interactions = []
+	GameState.player_inventory = []
+	GameState.player_stance = "Walk"
+	GameState.dialogue_active = false
+
+
+func after_test() -> void:
+	if _instance and is_instance_valid(_instance):
+		_instance.queue_free()
+		_instance = null
+
+
+# -- Helpers -------------------------------------------------------------------
+
+func _make_scene() -> Node:
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+	return _instance
+
+
+func _make_entity_renderer() -> Node2D:
+	var renderer = Node2D.new()
+	renderer.set_script(EntityRendererScript)
+	add_child(renderer)
+	return renderer
+
+
+func _make_fog_entities() -> Node2D:
+	var node = Node2D.new()
+	node.set_script(FogEntitiesScript)
+	add_child(node)
+	return node
+
+
+# -- Camera (5) ----------------------------------------------------------------
+
+func test_camera_zoom_default_2x() -> void:
+	# P2-C01: Camera zoom should be 2x as set in main.tscn.
+	var inst := _make_scene()
+	var camera: Camera2D = inst.get_node("Camera2D")
+	assert_that(camera.zoom).is_equal(Vector2(2, 2))
+
+
+func test_camera_smoothing_convergence() -> void:
+	# P2-C02: After first _process, smoothing re-enables for gameplay feel.
+	# After several frames, camera position should still match player position
+	# (smoothing converges because target == position when stationary).
+	var inst := _make_scene()
+	var camera: Camera2D = inst.get_node("Camera2D")
+	# First frame re-enables smoothing
+	inst._process(0.016)
+	assert_that(camera.position_smoothing_enabled).is_true()
+	# Several more frames — stationary player, camera converges
+	for i in 5:
+		inst._process(0.016)
+	var expected := GameState.player_position * Constants.TILE_SIZE
+	var dist := camera.global_position.distance_to(expected)
+	assert_that(dist < 0.1).override_failure_message(
+		"Camera should converge to player position (dist: %.4f)" % dist
+	).is_true()
+
+
+func test_camera_viewport_tracks_player_position() -> void:
+	# P2-C03: Camera position always equals player_position * TILE_SIZE.
+	# No offset, no viewport clamping beyond player tracking.
+	var inst := _make_scene()
+	var camera: Camera2D = inst.get_node("Camera2D")
+	var expected := GameState.player_position * Constants.TILE_SIZE
+	assert_that(camera.global_position).override_failure_message(
+		"Camera must track player position exactly"
+	).is_equal(expected)
+
+
+func test_camera_follows_player_after_movement() -> void:
+	# P2-C04: After player moves, camera position updates to new player position.
+	var inst := _make_scene()
+	var camera: Camera2D = inst.get_node("Camera2D")
+	var initial_pos := camera.global_position
+	# Move player south via SimBridge test mode
+	SimBridge._test_input_queue.append("MoveSouth")
+	inst._process(0.016)
+	# Camera should have moved with player
+	assert_that(camera.global_position.y > initial_pos.y).override_failure_message(
+		"Camera Y should increase after moving south"
+	).is_true()
+	assert_that(camera.global_position).is_equal(
+		GameState.player_position * Constants.TILE_SIZE)
+
+
+func test_camera_no_panning_locked_to_player() -> void:
+	# P2-C05 (D-014): Camera is locked to player — no panning.
+	# Camera position equals player_position * TILE_SIZE every frame.
+	var inst := _make_scene()
+	var camera: Camera2D = inst.get_node("Camera2D")
+	# Process multiple frames
+	for i in 10:
+		inst._process(0.016)
+		var expected := GameState.player_position * Constants.TILE_SIZE
+		assert_that(camera.global_position).override_failure_message(
+			"Frame %d: camera must be locked to player" % i
+		).is_equal(expected)
+
+
+# -- Entity alpha/color (4) ---------------------------------------------------
+
+func test_entity_null_visibility_defaults_full_alpha() -> void:
+	# P2-E01: Entity with no visibility field (v1 backward compat) → alpha 1.0.
+	var renderer := _make_entity_renderer()
+	var entity := [{"entity_id": 50, "x": 3.0, "y": 3.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity)
+	var node = renderer.entity_nodes[50]
+	assert_that(node.modulate.a).override_failure_message(
+		"Null visibility should default to full alpha"
+	).is_equal_approx(1.0, 0.01)
+	renderer.queue_free()
+
+
+func test_entity_peripheral_to_forward_alpha_transition() -> void:
+	# P2-E02: Updating entity from Peripheral to Forward changes alpha.
+	var renderer := _make_entity_renderer()
+	# First: Peripheral
+	var entity_p := [{"entity_id": 60, "x": 4.0, "y": 4.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}, "visibility": "Peripheral"}]
+	renderer.update_entities(entity_p)
+	var node = renderer.entity_nodes[60]
+	assert_that(node.modulate.a).is_equal_approx(Constants.PERIPHERAL_ALPHA, 0.01)
+	# Update to Forward
+	var entity_f := [{"entity_id": 60, "x": 4.0, "y": 4.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}, "visibility": "Forward"}]
+	renderer.update_entities(entity_f)
+	assert_that(node.modulate.a).override_failure_message(
+		"Forward visibility should set alpha to 1.0"
+	).is_equal_approx(1.0, 0.01)
+	renderer.queue_free()
+
+
+func test_entity_terrain_uses_object_color() -> void:
+	# P2-E03: Terrain entity kind maps to ENTITY_COLOR_OBJECT.
+	var renderer := _make_entity_renderer()
+	var entity := [{"entity_id": 70, "x": 2.0, "y": 2.0, "z": 0,
+		"kind": {"variant": "Terrain", "data": null}, "visibility": "Forward"}]
+	renderer.update_entities(entity)
+	var node = renderer.entity_nodes[70] as ColorRect
+	assert_that(node.color).override_failure_message(
+		"Terrain kind should use ENTITY_COLOR_OBJECT"
+	).is_equal(Constants.ENTITY_COLOR_OBJECT)
+	renderer.queue_free()
+
+
+func test_entity_player_color_regardless_of_sector() -> void:
+	# P2-E04: Player uses ENTITY_COLOR_PLAYER even in Peripheral sector.
+	GameState.player_entity_id = 80
+	var renderer := _make_entity_renderer()
+	var entity := [{"entity_id": 80, "x": 5.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Player", "data": null}, "visibility": "Peripheral"}]
+	renderer.update_entities(entity)
+	var node = renderer.entity_nodes[80] as ColorRect
+	assert_that(node.color).override_failure_message(
+		"Player color must be constant regardless of visibility sector"
+	).is_equal(Constants.ENTITY_COLOR_PLAYER)
+	# Alpha should still be dimmed for Peripheral
+	assert_that(node.modulate.a).is_equal_approx(Constants.PERIPHERAL_ALPHA, 0.01)
+	renderer.queue_free()
+
+
+# -- UI (7) --------------------------------------------------------------------
+
+func test_monologue_display_visible_hidden() -> void:
+	# P2-U01: MonologueDisplay starts hidden, becomes visible after show_monologue.
+	# Note: mono.is_visible is a custom bool property on MonologueDisplay
+	# (monologue_display.gd:11), not the built-in CanvasItem.is_visible() method.
+	# The monologue uses tween alpha for visual hide/show, so the built-in
+	# .visible stays true — we test the script's own state tracking.
+	var inst := _make_scene()
+	var mono = inst.get_node("UILayer/MonologueDisplay")
+	assert_that(mono.is_visible).override_failure_message(
+		"Monologue should start hidden"
+	).is_false()
+	mono.show_monologue("Test thought.", 3.0)
+	assert_that(mono.is_visible).override_failure_message(
+		"Monologue should be visible after show_monologue"
+	).is_true()
+	assert_that(mono.text_label.text).is_equal("Test thought.")
+
+
+func test_interaction_list_shows_nearest_verb() -> void:
+	# P2-U02: When nearby_interactions are present, interaction list shows verbs.
+	var inst := _make_scene()
+	var ilist = inst.get_node("InsertOverlay/InteractionList")
+	GameState.nearby_interactions = [{
+		"entity_id": 2,
+		"entity_type": "Npc",
+		"distance": 1,
+		"verbs": [
+			{"kind": "Talk", "label": "Talk", "priority": 1, "available": true},
+			{"kind": "Observe", "label": "Observe", "priority": 2, "available": true},
+		],
+	}]
+	ilist.update_from_state()
+	assert_that(ilist.get_visible_verb_count()).override_failure_message(
+		"Interaction list should show 2 verbs"
+	).is_equal(2)
+	assert_that(ilist.is_showing()).is_true()
+	# Cleanup
+	GameState.nearby_interactions = []
+
+
+func test_inventory_grid_shows_carried_items() -> void:
+	# P2-U03: Inventory grid becomes visible when player has items.
+	var inst := _make_scene()
+	var inv = inst.get_node("UILayer/InventoryGrid")
+	# Initially empty — hidden
+	GameState.player_inventory = []
+	inv.update_from_state()
+	assert_that(inv.visible).override_failure_message(
+		"Inventory should be hidden when empty"
+	).is_false()
+	# Add items
+	GameState.player_inventory = [
+		{"item_id": 1, "name": "Keycard", "slot": 0},
+		{"item_id": 2, "name": "Datapad", "slot": 1},
+	]
+	inv.update_from_state()
+	assert_that(inv.visible).override_failure_message(
+		"Inventory should be visible with items"
+	).is_true()
+	assert_that(inv.get_slot_count()).is_equal(2)
+	# Cleanup
+	GameState.player_inventory = []
+
+
+func test_dialogue_overlay_active_on_show() -> void:
+	# P2-U04: Dialogue box reports active after show_dialogue.
+	var inst := _make_scene()
+	var dlg = inst.get_node("InsertOverlay/DialogueBox")
+	assert_that(dlg.is_dialogue_active()).override_failure_message(
+		"Dialogue should start inactive"
+	).is_false()
+	dlg.show_dialogue("Kael", "How's it going?", [
+		{"text": "Fine.", "response_id": "r1", "priority": 1, "confrontation": false},
+	])
+	assert_that(dlg.is_dialogue_active()).override_failure_message(
+		"Dialogue should be active after show_dialogue"
+	).is_true()
+
+
+func test_game_state_tick_rate_paused() -> void:
+	# P2-U05: TickRate::Paused is stored in game_time and queryable.
+	GameState.apply_snapshot({
+		"tick": 1,
+		"game_time": {
+			"day": 0,
+			"time_of_day": 100,
+			"day_phase": "Morning",
+			"tick_rate": "Paused",
+		},
+	})
+	assert_that(GameState.game_time.tick_rate).override_failure_message(
+		"Paused tick rate must be stored in game_time"
+	).is_equal("Paused")
+
+
+func test_fog_entities_blob_count_matches_recognitions() -> void:
+	# P2-U06: FogEntities tracks one blob per pending recognition.
+	var fog_entities := _make_fog_entities()
+	var saved := GameState.pending_recognitions
+	GameState.pending_recognitions = [
+		{"entity_id": 101, "x": 5.0, "y": 5.0, "z": 0, "remaining_ticks": 3, "total_delay_ticks": 6},
+		{"entity_id": 102, "x": 8.0, "y": 8.0, "z": 0, "remaining_ticks": 1, "total_delay_ticks": 6},
+	]
+	fog_entities.update_from_state()
+	assert_that(fog_entities._entities.size()).override_failure_message(
+		"FogEntities should track 2 blob entities"
+	).is_equal(2)
+	assert_that(fog_entities._entities.has(101)).is_true()
+	assert_that(fog_entities._entities.has(102)).is_true()
+	GameState.pending_recognitions = saved
+	fog_entities.queue_free()
+
+
+func test_fog_overlay_z_index_covers_world() -> void:
+	# P2-U07: FogOverlay renders above world content (z:900), ensuring
+	# occluded tiles are visually covered.
+	var inst := _make_scene()
+	var fog_overlay = inst.get_node("World/FogOverlay")
+	assert_that(fog_overlay.z_index).override_failure_message(
+		"FogOverlay z_index must be %d (Z_FOG)" % Constants.Z_FOG
+	).is_equal(Constants.Z_FOG)
+	# FogEntities at z:950 — above fog, below insert overlay
+	var fog_entities = inst.get_node("World/FogEntities")
+	assert_that(fog_entities.z_index).override_failure_message(
+		"FogEntities z_index must be %d (Z_FOG_ENTITIES)" % Constants.Z_FOG_ENTITIES
+	).is_equal(Constants.Z_FOG_ENTITIES)

client/tests/test_client_p2.gd.uid

@@ -0,0 +1 @@
+uid://ci76ggq7n33w7

client/tests/test_client_p3.gd

@@ -0,0 +1,339 @@
+## P3 client tests: z-layer ordering (4), entity lerp (3), Tyre additions (5).
+## Validates scene tree draw order, framerate-independent entity interpolation,
+## and recognition transition timing.
+## Spec ref: sprint-9/client.md #493.
+class_name TestClientP3
+extends GdUnitTestSuite
+
+var EntityRendererScript = load("res://scripts/rendering/entity_renderer.gd")
+var FogEntitiesScript = load("res://scripts/rendering/fog_entities.gd")
+
+var _instance: Node = null
+
+
+func before_test() -> void:
+	SimBridge.reset_test_state()
+	SimBridge._last_snapshot = null
+	GameState.current_tick = 0
+	GameState.player_position = Vector2.ZERO
+	GameState.visible_entities = []
+	GameState.visible_tiles = []
+	GameState.visible_positions = {}
+	GameState.current_monologue = null
+	GameState.current_dialogue = null
+	GameState.game_time = {}
+	GameState.pending_recognitions = []
+	GameState.nearby_interactions = []
+	GameState.player_inventory = []
+	GameState.player_stance = "Walk"
+	GameState.player_facing = "North"
+	GameState.dialogue_active = false
+
+
+func after_test() -> void:
+	if _instance and is_instance_valid(_instance):
+		_instance.queue_free()
+		_instance = null
+
+
+# -- Helpers -------------------------------------------------------------------
+
+func _make_scene() -> Node:
+	var scene := load("res://scenes/main.tscn")
+	_instance = scene.instantiate()
+	auto_free(_instance)
+	add_child(_instance)
+	return _instance
+
+
+func _make_entity_renderer() -> Node2D:
+	var renderer = Node2D.new()
+	renderer.set_script(EntityRendererScript)
+	add_child(renderer)
+	return renderer
+
+
+func _make_fog_entities() -> Node2D:
+	var node = Node2D.new()
+	node.set_script(FogEntitiesScript)
+	add_child(node)
+	return node
+
+
+# -- Z-layer ordering (4) -----------------------------------------------------
+
+func test_z_floor_below_ysort() -> void:
+	# P3-Z01: FloorTiles (z:0) renders below YSortGroup (z:100).
+	var inst := _make_scene()
+	var floor_tiles = inst.get_node("World/FogGroup/FloorTiles")
+	var ysort = inst.get_node("World/FogGroup/YSortGroup")
+	assert_that(floor_tiles.z_index).override_failure_message(
+		"FloorTiles z_index must be Z_FLOOR (%d)" % Constants.Z_FLOOR
+	).is_equal(Constants.Z_FLOOR)
+	assert_that(ysort.z_index).override_failure_message(
+		"YSortGroup z_index must be Z_YSORT (%d)" % Constants.Z_YSORT
+	).is_equal(Constants.Z_YSORT)
+	assert_that(floor_tiles.z_index < ysort.z_index).is_true()
+
+
+func test_z_entities_inside_ysort_at_zero() -> void:
+	# P3-Z02: Entities node lives inside YSortGroup with z_index = 0.
+	# Y-sort contract: children of YSortGroup must use z_index = 0.
+	var inst := _make_scene()
+	var entities = inst.get_node("World/FogGroup/YSortGroup/Entities")
+	assert_that(entities.z_index).override_failure_message(
+		"Entities z_index must be 0 inside YSortGroup (y-sort contract)"
+	).is_equal(0)
+	assert_that(entities.get_parent().y_sort_enabled).override_failure_message(
+		"Entities parent must have y_sort_enabled"
+	).is_true()
+
+
+func test_z_fog_above_world_content() -> void:
+	# P3-Z03: FogOverlay (z:900) renders above all world content including
+	# YSortGroup (z:100) and Overhead (z:300).
+	# Spec #34: FogOverlay z_index == Z_FOG (900).
+	# Spec #35: FogEntities z_index == Z_FOG_ENTITIES (950).
+	var inst := _make_scene()
+	var fog = inst.get_node("World/FogOverlay")
+	var fog_entities = inst.get_node("World/FogEntities")
+	var fog_group = inst.get_node("World/FogGroup")
+	var overhead = inst.get_node("World/FogGroup/Overhead")
+	# FogOverlay must be a sibling of FogGroup (both children of World),
+	# not a child of FogGroup — fog renders OVER the composited group.
+	assert_that(fog.get_parent()).override_failure_message(
+		"FogOverlay must be sibling of FogGroup (both under World)"
+	).is_equal(fog_group.get_parent())
+	assert_that(fog.z_index).override_failure_message(
+		"FogOverlay z_index must be Z_FOG (%d) per D-049" % Constants.Z_FOG
+	).is_equal(Constants.Z_FOG)
+	assert_that(fog_entities.z_index).override_failure_message(
+		"FogEntities z_index must be Z_FOG_ENTITIES (%d) per D-049/D-059" % Constants.Z_FOG_ENTITIES
+	).is_equal(Constants.Z_FOG_ENTITIES)
+	assert_that(fog.z_index > overhead.z_index).override_failure_message(
+		"FogOverlay (z:%d) must render above Overhead (z:%d)" % [fog.z_index, overhead.z_index]
+	).is_true()
+	assert_that(fog_entities.z_index > fog.z_index).override_failure_message(
+		"FogEntities (z:%d) must render above FogOverlay (z:%d)" % [fog_entities.z_index, fog.z_index]
+	).is_true()
+
+
+func test_z_ui_layer_above_world() -> void:
+	# P3-Z04: UILayer (CanvasLayer 20) renders above InsertOverlay (CanvasLayer 10)
+	# and both render above world content.
+	var inst := _make_scene()
+	var ui_layer = inst.get_node("UILayer") as CanvasLayer
+	var insert_layer = inst.get_node("InsertOverlay") as CanvasLayer
+	var modal_layer = inst.get_node("ModalLayer") as CanvasLayer
+	assert_that(insert_layer.layer).override_failure_message(
+		"InsertOverlay must be CanvasLayer %d" % Constants.CANVAS_INSERT
+	).is_equal(Constants.CANVAS_INSERT)
+	assert_that(ui_layer.layer).override_failure_message(
+		"UILayer must be CanvasLayer %d" % Constants.CANVAS_UI
+	).is_equal(Constants.CANVAS_UI)
+	assert_that(modal_layer.layer).override_failure_message(
+		"ModalLayer must be CanvasLayer %d" % Constants.CANVAS_MODAL
+	).is_equal(Constants.CANVAS_MODAL)
+	assert_that(ui_layer.layer > insert_layer.layer).override_failure_message(
+		"UILayer must render above InsertOverlay"
+	).is_true()
+	assert_that(modal_layer.layer > ui_layer.layer).override_failure_message(
+		"ModalLayer must render above UILayer"
+	).is_true()
+
+
+# -- Entity lerp (3) ----------------------------------------------------------
+
+func test_entity_snap_on_first_appear() -> void:
+	# P3-L01: Entity spawns at its position immediately — no lerp on first appear.
+	var renderer := _make_entity_renderer()
+	var entity := [{"entity_id": 10, "x": 8.0, "y": 6.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity)
+	var node = renderer.entity_nodes[10]
+	var expected := Vector2(
+		floorf(8.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET,
+		floorf(6.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET
+	)
+	assert_that(node.position).override_failure_message(
+		"Entity should snap to position on first appear (no lerp)"
+	).is_equal(expected)
+	renderer.queue_free()
+
+
+func test_entity_lerp_moves_toward_target() -> void:
+	# P3-L02: After updating target position, entity moves toward it over time.
+	var renderer := _make_entity_renderer()
+	# Spawn at (5, 5)
+	var entity := [{"entity_id": 11, "x": 5.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity)
+	var node: ColorRect = renderer.entity_nodes[11]
+	var start_pos: Vector2 = node.position
+	# Move target to (6, 5)
+	var entity_moved := [{"entity_id": 11, "x": 6.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity_moved)
+	# Process several frames — entity should move toward target
+	renderer._process(0.016)
+	renderer._process(0.016)
+	var after_pos: Vector2 = node.position
+	var target := Vector2(
+		floorf(6.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET,
+		floorf(5.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET
+	)
+	# Position should have moved toward target (x increased)
+	assert_that(after_pos.x > start_pos.x).override_failure_message(
+		"Entity x should move toward target after _process"
+	).is_true()
+	# But should not have snapped — still in transit
+	assert_that(after_pos.x < target.x).override_failure_message(
+		"Entity should still be in transit after 2 frames"
+	).is_true()
+	renderer.queue_free()
+
+
+func test_entity_lerp_converges_within_300ms() -> void:
+	# P3-L03: At LERP_SPEED=12.0, entity converges within ~0.3s.
+	# At 12.0: weight = 1.0 - exp(-12.0 * 0.3) ≈ 0.973 — 97% there.
+	var renderer := _make_entity_renderer()
+	# Spawn at (5, 5)
+	var entity := [{"entity_id": 12, "x": 5.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity)
+	# Move target to (7, 5) — 2 tiles
+	var entity_moved := [{"entity_id": 12, "x": 7.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity_moved)
+	var target := Vector2(
+		floorf(7.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET,
+		floorf(5.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET
+	)
+	# Simulate 0.3s at 60fps (18 frames × 0.016s ≈ 0.288s)
+	for i in 20:
+		renderer._process(0.016)
+	var final_node: ColorRect = renderer.entity_nodes[12]
+	var final_pos: Vector2 = final_node.position
+	# Should be within 5% of target (97% convergence at 0.3s)
+	var dist: float = final_pos.distance_to(target)
+	var total_dist: float = 2.0 * Constants.TILE_SIZE
+	assert_that(dist / total_dist < 0.05).override_failure_message(
+		"Entity should be within 5%% of target after 0.3s (dist: %.1f / %.1f)" % [dist, total_dist]
+	).is_true()
+	renderer.queue_free()
+
+
+# -- Tyre additions (5) -------------------------------------------------------
+
+func test_recognition_transition_progress() -> void:
+	# P3-T01: Recognition progress calculated correctly from remaining/total ticks.
+	# Grey blob → colored entity over total_delay_ticks.
+	var fog_entities := _make_fog_entities()
+	var saved := GameState.pending_recognitions
+	# 3 remaining out of 10 total → progress 0.7
+	GameState.pending_recognitions = [{
+		"entity_id": 200, "x": 5.0, "y": 5.0, "z": 0,
+		"remaining_ticks": 3, "total_delay_ticks": 10,
+	}]
+	fog_entities.update_from_state()
+	var blob: Dictionary = fog_entities._entities[200]
+	assert_that(blob.progress).override_failure_message(
+		"Progress should be 0.7 (1.0 - 3/10)"
+	).is_equal_approx(0.7, 0.01)
+	# 0 remaining → fully recognized (progress 1.0)
+	GameState.pending_recognitions = [{
+		"entity_id": 200, "x": 5.0, "y": 5.0, "z": 0,
+		"remaining_ticks": 0, "total_delay_ticks": 10,
+	}]
+	fog_entities.update_from_state()
+	assert_that(fog_entities._entities[200].progress).override_failure_message(
+		"Zero remaining should be progress 1.0"
+	).is_equal_approx(1.0, 0.01)
+	GameState.pending_recognitions = saved
+	fog_entities.queue_free()
+
+
+func test_facing_indicator_rotation_matches_player_facing() -> void:
+	# P3-T02: Facing indicator rotation matches player_facing from snapshot.
+	GameState.player_entity_id = 1
+	var renderer := _make_entity_renderer()
+	var entity := [{"entity_id": 1, "x": 5.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Player", "data": null}, "visibility": "Forward"}]
+	renderer.update_entities(entity)
+	var indicator = renderer.entity_nodes[1].get_node("FacingIndicator")
+	# Test each cardinal + diagonal direction
+	var expected := {
+		"North": 0.0,
+		"East": PI / 2.0,
+		"South": PI,
+		"West": 3.0 * PI / 2.0,
+	}
+	for dir in expected:
+		GameState.player_facing = dir
+		renderer.update_entities(entity)
+		assert_that(indicator.rotation).override_failure_message(
+			"%s: expected rotation %.3f, got %.3f" % [dir, expected[dir], indicator.rotation]
+		).is_equal_approx(expected[dir], 0.001)
+	renderer.queue_free()
+
+
+func test_lerp_weight_increases_with_delta() -> void:
+	# P3-T03: Sprint snappiness — larger delta → larger lerp weight → faster arrival.
+	# Exponential smoothing: weight = 1.0 - exp(-LERP_SPEED * delta).
+	# Higher delta (or higher lerp multiplier) means more progress per frame.
+	var renderer := _make_entity_renderer()
+	# Spawn entity, then move target
+	var entity := [{"entity_id": 20, "x": 5.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity)
+	var entity_moved := [{"entity_id": 20, "x": 8.0, "y": 5.0, "z": 0,
+		"kind": {"variant": "Npc", "data": null}}]
+	renderer.update_entities(entity_moved)
+	# Small delta step
+	var small_node: ColorRect = renderer.entity_nodes[20]
+	var small_start: float = small_node.position.x
+	renderer._process(0.008)
+	var small_progress: float = small_node.position.x - small_start
+	# Reset position for large delta test
+	small_node.position = Vector2(
+		floorf(5.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET,
+		floorf(5.0) * Constants.TILE_SIZE + EntityRenderer.ENTITY_OFFSET
+	)
+	# Large delta step
+	var large_start: float = small_node.position.x
+	renderer._process(0.032)
+	var large_progress: float = small_node.position.x - large_start
+	assert_that(large_progress > small_progress).override_failure_message(
+		"Larger delta should produce more lerp progress (%.2f vs %.2f)" % [large_progress, small_progress]
+	).is_true()
+	renderer.queue_free()
+
+
+func test_recognition_blob_removed_when_absent() -> void:
+	# P3-T04: When a pending recognition disappears from state, FogEntities
+	# removes the blob.
+	var fog_entities := _make_fog_entities()
+	var saved := GameState.pending_recognitions
+	# Add entity
+	GameState.pending_recognitions = [{
+		"entity_id": 300, "x": 10.0, "y": 10.0, "z": 0,
+		"remaining_ticks": 5, "total_delay_ticks": 10,
+	}]
+	fog_entities.update_from_state()
+	assert_that(fog_entities._entities.size()).is_equal(1)
+	# Remove from state
+	GameState.pending_recognitions = []
+	fog_entities.update_from_state()
+	assert_that(fog_entities._entities.size()).override_failure_message(
+		"Blob should be removed when absent from pending_recognitions"
+	).is_equal(0)
+	GameState.pending_recognitions = saved
+	fog_entities.queue_free()
+
+
+func test_entity_renderer_lerp_speed_constant() -> void:
+	# P3-T05: LERP_SPEED is tuned at 12.0 — exponential smoothing constant
+	# for entity visual interpolation. Pin value to prevent accidental changes.
+	assert_that(EntityRenderer.LERP_SPEED).override_failure_message(
+		"LERP_SPEED must be 12.0 (entity movement feel constant)"
+	).is_equal(12.0)

client/tests/test_client_p3.gd.uid

@@ -0,0 +1 @@
+uid://bas5l8rnvsjly

client/tests/test_cursor_states.gd.uid

@@ -0,0 +1 @@
+uid://mg1wnv1ydc6m

client/tests/test_fog_shader.gd.uid

@@ -0,0 +1 @@
+uid://foiy3bk1jko7

client/tests/test_interaction_list.gd.uid

@@ -0,0 +1 @@
+uid://w7k3k1584ir7

client/tests/test_msgpack_boundaries.gd

@@ -85,13 +85,8 @@ func test_encode_uint32() -> void:
 
 
 func test_encode_int64_positive() -> void:
-	# BV-P24 to BV-P25: int 64 range (2^32 to 2^63-1)
-	# KNOWN-DEFECT: The encoder's int_64 branch condition `-(1 << 63) <= v < (1 << 63)`
-	# evaluates to `MIN_INT64 <= v < MIN_INT64` due to overflow, making it dead code.
-	# Values that should be int_64 (0xd3) are instead encoded as uint_64 (0xcf).
-	# Roundtrip still works because put_u64/get_u64 preserve the bit pattern.
-	# This test documents ACTUAL behavior. Fix tracked in backlog.
-	# See: messagepack.gd int_64 branch — use explicit constant instead of `1 << 63`.
+	# BV-P24 to BV-P25: positive values > uint_32 max → uint_64 (0xcf)
+	# Positive values correctly use uint_64 encoding for Rust interop.
 	_assert_encodes_to(4294967296, PackedByteArray([
 		0xcf, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00
 	]), "BV-P24")
@@ -138,16 +133,15 @@ func test_encode_int32_negative() -> void:
 
 func test_encode_int64_negative() -> void:
 	# BV-N15 to BV-N16: int 64 range (< -2147483648)
-	# KNOWN-DEFECT: Same int_64 branch issue as positive int_64 — encoded as uint_64 (0xcf).
-	# Bit pattern is preserved: put_u64(negative) writes two's complement,
-	# get_u64() reads it back and Variant stores as int64 with same bit pattern.
+	# Negative values beyond int_32 now correctly encode as int_64 (0xd3).
+	# Fixed: encoder's int_64 branch used `-(1 << 63)` which overflowed to dead code.
 	_assert_encodes_to(-2147483649, PackedByteArray([
-		0xcf, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff
+		0xd3, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0xff, 0xff
 	]), "BV-N15")
 	# MIN_INT64: -9223372036854775808
 	var min_int64: int = -9223372036854775807 - 1
 	_assert_encodes_to(min_int64, PackedByteArray([
-		0xcf, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+		0xd3, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 	]), "BV-N16")
 
 

client/tests/test_msgpack_boundaries.gd.uid

@@ -0,0 +1 @@
+uid://bka1i18dfqay1

client/tests/test_p0_regressions.gd.uid

@@ -0,0 +1 @@
+uid://br7kv0dyk3w2k

client/tests/test_protocol_bridge.gd.uid

@@ -0,0 +1 @@
+uid://cefjgd1iqi7qn

client/tests/test_protocol_v7.gd.uid

@@ -0,0 +1 @@
+uid://bjd6g15syl2qy

client/ui/bug_report_dialog.gd

@@ -0,0 +1,206 @@
+extends Control
+
+## #495: WRONG button (F12) MVP — bug report capture dialog.
+## On F12: pause sim, show one-line prompt, save snapshot + render + description, unpause.
+## Output: user://bug-reports/gauntlet-t{tick}-{timestamp}/
+
+signal capture_completed
+signal capture_cancelled
+
+const BG_COLOR := Color(0.05, 0.05, 0.08, 0.85)
+const BORDER_COLOR := Color("#4a9ebb")
+const TEXT_COLOR := Color("#c8d0e0")
+const FONT_SIZE := 14
+const LABEL_FONT_SIZE := 13
+const BOX_WIDTH := 500
+const BOX_HEIGHT := 120
+const PADDING := 16
+
+var _line_edit: LineEdit = null
+var _active: bool = false
+
+
+func _ready() -> void:
+	visible = false
+	mouse_filter = Control.MOUSE_FILTER_STOP
+
+
+func start_capture() -> void:
+	if _active:
+		return
+	_active = true
+	visible = true
+
+	# Pause the simulation
+	SimBridge.send_input({
+		"action": InputMapper.Action.PAUSE,
+		"timestamp_msec": Time.get_ticks_msec(),
+	})
+
+	# Create the LineEdit dynamically
+	_line_edit = LineEdit.new()
+	_line_edit.placeholder_text = "Describe the issue..."
+	_line_edit.size = Vector2(BOX_WIDTH - PADDING * 2, 30)
+	_line_edit.position = Vector2(
+		(get_viewport_rect().size.x - BOX_WIDTH) / 2.0 + PADDING,
+		(get_viewport_rect().size.y - BOX_HEIGHT) / 2.0 + 50
+	)
+	_line_edit.add_theme_font_size_override("font_size", FONT_SIZE)
+	_line_edit.text_submitted.connect(_on_text_submitted)
+	add_child(_line_edit)
+	_line_edit.grab_focus()
+
+
+func _on_text_submitted(text: String) -> void:
+	_save_report(text)
+	_close()
+	capture_completed.emit()
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if not _active:
+		return
+	if event is InputEventKey and event.pressed and event.keycode == KEY_ESCAPE:
+		_close()
+		capture_cancelled.emit()
+		get_viewport().set_input_as_handled()
+
+
+func _close() -> void:
+	_active = false
+	visible = false
+	if _line_edit:
+		_line_edit.queue_free()
+		_line_edit = null
+
+	# Unpause the simulation
+	SimBridge.send_input({
+		"action": InputMapper.Action.UNPAUSE,
+		"timestamp_msec": Time.get_ticks_msec(),
+	})
+
+
+func _save_report(description: String) -> void:
+	var tick := GameState.current_tick
+	var timestamp := Time.get_datetime_string_from_system().replace(":", "-").replace("T", "_")
+	var dir_name := "gauntlet-t%d-%s" % [tick, timestamp]
+	var base_path := "user://bug-reports/" + dir_name
+
+	# Ensure directory exists
+	var dir_err := DirAccess.make_dir_recursive_absolute(base_path)
+	if dir_err != OK:
+		push_error("BugReport: failed to create directory %s (error %d)" % [base_path, dir_err])
+		return
+
+	var files_saved := 0
+
+	# 1. snapshot.json — full current snapshot as JSON
+	var snapshot_path := base_path + "/snapshot.json"
+	var snapshot_file := FileAccess.open(snapshot_path, FileAccess.WRITE)
+	if snapshot_file:
+		snapshot_file.store_string(JSON.stringify(GameState.current_snapshot, "\t"))
+		snapshot_file.close()
+		files_saved += 1
+	else:
+		push_error("BugReport: failed to write %s" % snapshot_path)
+
+	# 2. render.txt — simplified client-side text render of snapshot
+	var render_path := base_path + "/render.txt"
+	var render_file := FileAccess.open(render_path, FileAccess.WRITE)
+	if render_file:
+		render_file.store_string(_render_snapshot_text())
+		render_file.close()
+		files_saved += 1
+	else:
+		push_error("BugReport: failed to write %s" % render_path)
+
+	# 3. description.txt — tester description + metadata
+	var desc_path := base_path + "/description.txt"
+	var desc_file := FileAccess.open(desc_path, FileAccess.WRITE)
+	if desc_file:
+		desc_file.store_string("Description: %s\n" % description)
+		desc_file.store_string("Tick: %d\n" % tick)
+		desc_file.store_string("Room: %s\n" % str(GameState.room_id if GameState.room_id else "none"))
+		desc_file.store_string("Stance: %s\n" % GameState.player_stance)
+		desc_file.store_string("Facing: %s\n" % GameState.player_facing)
+		desc_file.store_string("Position: %s\n" % str(GameState.player_position))
+		desc_file.store_string("Timestamp: %s\n" % Time.get_datetime_string_from_system())
+		desc_file.close()
+		files_saved += 1
+	else:
+		push_error("BugReport: failed to write %s" % desc_path)
+
+	push_warning("BugReport: saved %d/3 files to %s" % [files_saved, base_path])
+
+
+## Simplified client-side text render of the current snapshot.
+## MVP version — full fidelity via server's format_snapshot_text() is a stretch goal.
+func _render_snapshot_text() -> String:
+	var lines: PackedStringArray = []
+	lines.append("=== Snapshot t%d ===" % GameState.current_tick)
+	lines.append("Player: %s facing %s (%s)" % [
+		str(GameState.player_position), GameState.player_facing, GameState.player_stance])
+
+	if GameState.game_time.size() > 0:
+		lines.append("Time: day %s, %s, %s" % [
+			str(GameState.game_time.get("day", "?")),
+			str(GameState.game_time.get("day_phase", "?")),
+			str(GameState.game_time.get("tick_rate", "?"))])
+
+	lines.append("")
+	lines.append("Entities (%d):" % GameState.visible_entities.size())
+	for entity in GameState.visible_entities:
+		var kind_str: String = ""
+		if entity.has("kind") and entity.kind is Dictionary:
+			kind_str = entity.kind.get("variant", "?")
+		elif entity.has("kind") and entity.kind is String:
+			kind_str = entity.kind
+		var vis: String = entity.get("visibility", "?")
+		lines.append("  #%s %s at (%s, %s) [%s]" % [
+			str(entity.get("entity_id", "?")),
+			kind_str,
+			str(entity.get("x", "?")),
+			str(entity.get("y", "?")),
+			vis])
+
+	lines.append("")
+	lines.append("Visible tiles: %d" % GameState.visible_tiles.size())
+
+	if GameState.current_monologue != null:
+		lines.append("Monologue: %s" % str(GameState.current_monologue.get("text", "")))
+	if GameState.current_dialogue != null:
+		lines.append("Dialogue: %s says '%s'" % [
+			str(GameState.current_dialogue.get("npc_name", "?")),
+			str(GameState.current_dialogue.get("speech", ""))])
+
+	return "\n".join(lines)
+
+
+func _draw() -> void:
+	if not _active:
+		return
+	var viewport_size := get_viewport_rect().size
+	# Full-screen dim
+	draw_rect(Rect2(Vector2.ZERO, viewport_size), BG_COLOR)
+
+	# Center box
+	var box_pos := Vector2(
+		(viewport_size.x - BOX_WIDTH) / 2.0,
+		(viewport_size.y - BOX_HEIGHT) / 2.0
+	)
+	var box_rect := Rect2(box_pos, Vector2(BOX_WIDTH, BOX_HEIGHT))
+	draw_rect(box_rect, Color(0.08, 0.08, 0.12, 0.95))
+	draw_rect(box_rect, BORDER_COLOR, false, 1.0)
+
+	# Title
+	var font := ThemeDB.fallback_font
+	draw_string(font,
+		box_pos + Vector2(PADDING, 24),
+		"WRONG — Describe the issue (Enter to save, Esc to cancel):",
+		HORIZONTAL_ALIGNMENT_LEFT, -1, LABEL_FONT_SIZE, TEXT_COLOR)
+
+
+# -- Public API ---------------------------------------------------------------
+
+func is_active() -> bool:
+	return _active

client/ui/bug_report_dialog.gd.uid

@@ -0,0 +1 @@
+uid://dwdssbevd8gqq

client/ui/bug_report_dialog.tscn

@@ -0,0 +1,14 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://ui/bug_report_dialog.gd" id="1_bugreport"]
+
+; #495: WRONG button (F12) — bug report capture dialog, ModalLayer
+[node name="BugReportDialog" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+script = ExtResource("1_bugreport")

client/ui/dialogue_box.gd.uid

@@ -0,0 +1 @@
+uid://btwe5f7tmm3o4

client/ui/gauntlet_hud.gd

@@ -0,0 +1,182 @@
+extends Control
+
+## #496: Gauntlet HUD — room timer + personal bests.
+## Shows TIMER: MM:SS (PB: MM:SS) in top-right, below StanceIndicator.
+## Hidden in non-gauntlet mode. Stats persisted to user://dev/gauntlet-stats.json.
+
+const BG_COLOR := Color(0.05, 0.05, 0.08, 0.5)
+const TIMER_COLOR := Color("#c8d0e0")       # Default insert text
+const PB_COLOR := Color("#6bc9a6")          # Friendly green — personal best
+const NEW_PB_COLOR := Color("#e8c547")      # Amber flash on new PB
+const FONT_SIZE := 13
+const PADDING := Vector2(10, 6)
+const STATS_PATH := "user://dev/gauntlet-stats.json"
+
+var _timer_seconds: float = 0.0
+var _timer_running: bool = false
+var _current_room_id: Variant = null
+var _personal_bests: Dictionary = {}  # room_id -> float (seconds)
+var _session_rooms: Dictionary = {}  # room_id -> {attempts: int, best: float}
+var _new_pb_flash: float = 0.0  # Countdown for PB flash effect
+
+
+func _ready() -> void:
+	mouse_filter = Control.MOUSE_FILTER_IGNORE
+	visible = false
+	_load_stats()
+
+
+func _process(delta: float) -> void:
+	if not visible:
+		return
+	if _timer_running:
+		_timer_seconds += delta
+		queue_redraw()
+	if _new_pb_flash > 0.0:
+		_new_pb_flash -= delta
+		queue_redraw()
+
+
+func update_from_state() -> void:
+	if not GameState.gauntlet_mode:
+		if visible:
+			visible = false
+		return
+
+	if not visible:
+		visible = true
+		queue_redraw()
+
+	var new_room_id: Variant = GameState.room_id
+	if new_room_id == null:
+		# Gauntlet mode but no room yet — stop timer, clear tracked room
+		# so re-entry to the same room after null triggers a restart.
+		_timer_running = false
+		_current_room_id = null
+		return
+
+	if new_room_id != _current_room_id:
+		_on_room_change(str(new_room_id))
+
+
+func _on_room_change(new_room_id: String) -> void:
+	# Record completion of previous room
+	if _current_room_id != null and _timer_running:
+		_record_room_completion(_current_room_id, _timer_seconds)
+
+	# Start timer for new room
+	_current_room_id = new_room_id
+	_timer_seconds = 0.0
+	_timer_running = true
+
+	# Track session stats
+	if not _session_rooms.has(new_room_id):
+		_session_rooms[new_room_id] = {"attempts": 0, "best": INF}
+	_session_rooms[new_room_id]["attempts"] += 1
+
+	queue_redraw()
+
+
+func _record_room_completion(completed_room_id: String, seconds: float) -> void:
+	var old_pb: float = _personal_bests.get(completed_room_id, INF)
+	if seconds < old_pb:
+		_personal_bests[completed_room_id] = seconds
+		_new_pb_flash = 2.0  # Flash for 2 seconds
+		_save_stats()
+
+	# Update session tracking
+	if _session_rooms.has(completed_room_id):
+		var entry: Dictionary = _session_rooms[completed_room_id]
+		if seconds < entry["best"]:
+			entry["best"] = seconds
+
+
+func _draw() -> void:
+	var font := ThemeDB.fallback_font
+
+	var timer_text := "TIMER: " + _format_time(_timer_seconds)
+	var pb_text := ""
+	if _current_room_id != null and _personal_bests.has(_current_room_id):
+		pb_text = " (PB: " + _format_time(_personal_bests[_current_room_id]) + ")"
+
+	var full_text := timer_text + pb_text
+	var text_size := font.get_string_size(full_text, HORIZONTAL_ALIGNMENT_LEFT, -1, FONT_SIZE)
+	var box_size := text_size + PADDING * 2
+
+	# Background
+	draw_rect(Rect2(Vector2.ZERO, box_size), BG_COLOR)
+
+	# Timer text
+	var y_offset := PADDING.y + text_size.y
+	var timer_size := font.get_string_size(timer_text, HORIZONTAL_ALIGNMENT_LEFT, -1, FONT_SIZE)
+	draw_string(font, Vector2(PADDING.x, y_offset), timer_text, HORIZONTAL_ALIGNMENT_LEFT, -1, FONT_SIZE, TIMER_COLOR)
+
+	# PB text (different color)
+	if not pb_text.is_empty():
+		var pb_color: Color = NEW_PB_COLOR if _new_pb_flash > 0.0 else PB_COLOR
+		draw_string(font, Vector2(PADDING.x + timer_size.x, y_offset), pb_text, HORIZONTAL_ALIGNMENT_LEFT, -1, FONT_SIZE, pb_color)
+
+
+static func _format_time(seconds: float) -> String:
+	var total_secs := int(seconds)
+	var mins := total_secs / 60
+	var secs := total_secs % 60
+	return "%02d:%02d" % [mins, secs]
+
+
+func _load_stats() -> void:
+	if not FileAccess.file_exists(STATS_PATH):
+		return
+	var file := FileAccess.open(STATS_PATH, FileAccess.READ)
+	if file == null:
+		return
+	var json := JSON.new()
+	var err := json.parse(file.get_as_text())
+	file.close()
+	if err == OK and json.data is Dictionary:
+		_personal_bests = json.data
+
+
+func _save_stats() -> void:
+	var file := FileAccess.open(STATS_PATH, FileAccess.WRITE)
+	if file == null:
+		push_warning("GauntletHUD: cannot write stats to %s" % STATS_PATH)
+		return
+	file.store_string(JSON.stringify(_personal_bests, "\t"))
+	file.close()
+
+
+func print_session_summary() -> void:
+	if _session_rooms.is_empty():
+		return
+	print("=== Gauntlet Session Summary ===")
+	for room_id in _session_rooms:
+		var entry: Dictionary = _session_rooms[room_id]
+		var best_str := _format_time(entry["best"]) if entry["best"] != INF else "--:--"
+		var pb_str := _format_time(_personal_bests[room_id]) if _personal_bests.has(room_id) else "--:--"
+		print("  Room %s: %d attempts, session best %s, all-time PB %s" % [
+			room_id, entry["attempts"], best_str, pb_str])
+	print("================================")
+
+
+# Record current room if timer is running (called on disconnect)
+func finalize() -> void:
+	if _current_room_id != null and _timer_running:
+		_record_room_completion(_current_room_id, _timer_seconds)
+		_timer_running = false
+	print_session_summary()
+
+
+# -- Public API ---------------------------------------------------------------
+
+func get_timer_seconds() -> float:
+	return _timer_seconds
+
+func is_timer_running() -> bool:
+	return _timer_running
+
+func get_current_room_id() -> Variant:
+	return _current_room_id
+
+func get_personal_best(for_room_id: String) -> float:
+	return _personal_bests.get(for_room_id, INF)

client/ui/gauntlet_hud.gd.uid

@@ -0,0 +1 @@
+uid://2dtu0xe0odtf

client/ui/gauntlet_hud.tscn

@@ -0,0 +1,17 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://ui/gauntlet_hud.gd" id="1_gauntlet"]
+
+; #496: Gauntlet HUD — room timer + personal bests, top-right below StanceIndicator
+[node name="GauntletHUD" type="Control"]
+layout_mode = 3
+anchors_preset = 1
+anchor_left = 1.0
+anchor_right = 1.0
+offset_left = -160.0
+offset_top = 48.0
+offset_right = -16.0
+offset_bottom = 74.0
+grow_horizontal = 0
+mouse_filter = 2
+script = ExtResource("1_gauntlet")

client/ui/interaction_list.gd.uid

@@ -0,0 +1 @@
+uid://wkkt2nhmygtm

client/ui/inventory_grid.gd.uid

@@ -0,0 +1 @@
+uid://dhdp146dcog3x

client/ui/stance_indicator.gd.uid

@@ -0,0 +1 @@
+uid://7y327ugttryy

client/ui/world_radial.gd.uid

@@ -0,0 +1 @@
+uid://ct55qobqip5nn

content/_schema/checklist.schema.json

@@ -0,0 +1,135 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "checklist.schema.json",
+  "title": "Gauntlet QA Checklist",
+  "description": "Per-room QA checklist with conditions evaluable from ObserverSnapshot (D-030). Feeds into #503 auto-checklist progress tracking.",
+  "type": "object",
+  "required": ["conditions"],
+  "additionalProperties": false,
+  "properties": {
+    "room_id": {
+      "type": "string",
+      "pattern": "^[a-z][a-z0-9_]*$",
+      "description": "Room identifier matching constants.rs room name"
+    },
+    "room_name": {
+      "type": "string",
+      "minLength": 1,
+      "description": "Human-readable room name"
+    },
+    "scope": {
+      "type": "string",
+      "enum": ["per_room", "cross_room"],
+      "description": "Checklist scope: per_room (default) or cross_room"
+    },
+    "description": {
+      "type": "string"
+    },
+    "conditions": {
+      "type": "array",
+      "items": {
+        "oneOf": [
+          { "$ref": "#/$defs/player_near" },
+          { "$ref": "#/$defs/player_facing" },
+          { "$ref": "#/$defs/entity_present" },
+          { "$ref": "#/$defs/entity_absent" },
+          { "$ref": "#/$defs/expected_monologue" },
+          { "$ref": "#/$defs/expected_dialogue" },
+          { "$ref": "#/$defs/expected_interaction_verb" }
+        ]
+      },
+      "minItems": 1
+    }
+  },
+  "$defs": {
+    "condition_id": {
+      "type": "string",
+      "pattern": "^[a-z][a-z0-9_-]*$",
+      "description": "Globally unique condition identifier across all checklists. Use room_id prefix (e.g., inv-item-present, occ-wall-visible)."
+    },
+    "player_near": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "x", "y", "radius"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "player_near" },
+        "x": { "type": "integer", "description": "Target X coordinate (absolute sim tiles)" },
+        "y": { "type": "integer", "description": "Target Y coordinate (absolute sim tiles)" },
+        "radius": { "type": "number", "minimum": 0, "description": "Proximity radius in tiles" }
+      }
+    },
+    "player_facing": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "direction"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "player_facing" },
+        "direction": {
+          "type": "string",
+          "enum": ["North", "South", "East", "West"],
+          "description": "Expected player facing direction"
+        }
+      }
+    },
+    "entity_present": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "entity_id"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "entity_present" },
+        "entity_id": { "type": "integer", "minimum": 0, "description": "StableId of expected entity" }
+      }
+    },
+    "entity_absent": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "entity_id"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "entity_absent" },
+        "entity_id": { "type": "integer", "minimum": 0, "description": "StableId of entity that should NOT be visible" }
+      }
+    },
+    "expected_monologue": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "contains"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "expected_monologue" },
+        "contains": { "type": "string", "minLength": 1, "description": "Substring expected in current_monologue text" }
+      }
+    },
+    "expected_dialogue": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "contains"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "expected_dialogue" },
+        "contains": { "type": "string", "minLength": 1, "description": "Substring expected in dialogue_response text" }
+      }
+    },
+    "expected_interaction_verb": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["id", "description", "condition_type", "entity_id", "verb"],
+      "properties": {
+        "id": { "$ref": "#/$defs/condition_id" },
+        "description": { "type": "string" },
+        "condition_type": { "const": "expected_interaction_verb" },
+        "entity_id": { "type": "integer", "minimum": 0, "description": "StableId of target entity" },
+        "verb": { "type": "string", "minLength": 1, "description": "Expected interaction verb (e.g., Talk, Pickup, Examine)" }
+      }
+    }
+  }
+}

content/gauntlet/cross_room_checks.yaml

@@ -0,0 +1,7 @@
+scope: cross_room
+description: "Cross-room checks applied to every Gauntlet room visit."
+conditions:
+  - id: cross-player-entity-present
+    description: "Player entity (StableId 0) always present in snapshot"
+    condition_type: entity_present
+    entity_id: 0

content/gauntlet/rooms/inventory_warehouse/checklist.yaml

@@ -0,0 +1,42 @@
+room_id: inventory_warehouse
+room_name: Inventory Warehouse
+description: "Tests D-065 (9-slot inventory), pickup/drop verbs, CarriedBy component. 10 crates (StableId 13-22) + 1 NPC (StableId 23)."
+conditions:
+  - id: inv-player-spawn
+    description: "Player starts near warehouse spawn position"
+    condition_type: player_near
+    x: 17
+    y: 54
+    radius: 2.0
+
+  - id: inv-player-facing-east
+    description: "Player faces east at spawn"
+    condition_type: player_facing
+    direction: East
+
+  - id: inv-crate-01-visible
+    description: "First crate (Keycard) is visible from spawn"
+    condition_type: entity_present
+    entity_id: 13
+
+  - id: inv-crate-10-visible
+    description: "Last crate (Chip) is visible"
+    condition_type: entity_present
+    entity_id: 22
+
+  - id: inv-npc-warehouse-visible
+    description: "Warehouse supervisor NPC is present"
+    condition_type: entity_present
+    entity_id: 23
+
+  - id: inv-crate-pickup-verb
+    description: "Pickup verb available on crate when nearby"
+    condition_type: expected_interaction_verb
+    entity_id: 13
+    verb: Pickup
+
+  - id: inv-npc-talk-verb
+    description: "Talk verb available on warehouse NPC"
+    condition_type: expected_interaction_verb
+    entity_id: 23
+    verb: Talk

content/gauntlet/rooms/occlusion_corridor/checklist.yaml

@@ -0,0 +1,41 @@
+room_id: occlusion_corridor
+room_name: Occlusion Corridor
+description: "Tests D-035 (symmetric shadowcasting), D-017 (perception modes), D-015 (vision cone sectors). 4 NPCs (StableId 9-12)."
+conditions:
+  - id: occ-player-spawn
+    description: "Player starts at corridor entrance"
+    condition_type: player_near
+    x: 84
+    y: 58
+    radius: 2.0
+
+  - id: occ-player-facing-east
+    description: "Player faces east down the corridor"
+    condition_type: player_facing
+    direction: East
+
+  - id: occ-guard-visible
+    description: "Guard NPC in clear LOS from spawn"
+    condition_type: entity_present
+    entity_id: 9
+
+  - id: occ-hidden-npc-absent
+    description: "NPC behind north wall segment is NOT visible from spawn"
+    condition_type: entity_absent
+    entity_id: 10
+
+  - id: occ-peripheral-npc-visible
+    description: "South alcove NPC visible in peripheral vision sector"
+    condition_type: entity_present
+    entity_id: 11
+
+  - id: occ-far-end-visible
+    description: "Far end NPC visible down corridor"
+    condition_type: entity_present
+    entity_id: 12
+
+  - id: occ-guard-talk-verb
+    description: "Talk verb available on guard NPC when nearby"
+    condition_type: expected_interaction_verb
+    entity_id: 9
+    verb: Talk

content/gauntlet/rooms/pause_chamber/checklist.yaml

@@ -0,0 +1,26 @@
+room_id: pause_chamber
+room_name: Pause Chamber
+description: "Tests D-031 (pause/unpause), Bug #3 regression (movement while paused). 1 NPC (StableId 29)."
+conditions:
+  - id: pause-player-spawn
+    description: "Player starts at chamber center"
+    condition_type: player_near
+    x: 50
+    y: 86
+    radius: 2.0
+
+  - id: pause-player-facing-north
+    description: "Player faces north at spawn"
+    condition_type: player_facing
+    direction: North
+
+  - id: pause-npc-present
+    description: "Pause target NPC is visible"
+    condition_type: entity_present
+    entity_id: 29
+
+  - id: pause-talk-verb
+    description: "Talk verb available on NPC (should work while paused)"
+    condition_type: expected_interaction_verb
+    entity_id: 29
+    verb: Talk

db/connectors/sprint

@@ -358,7 +358,25 @@ def cmd_stop(args):
     cancelled = [t for t in tickets if t["status"] == "cancelled"]
     incomplete = [t for t in tickets if t["status"] not in ("done", "cancelled")]
 
-    # Complete
+    # Auto-close: mark picked-up tickets (in_progress, review) as done.
+    # Work merged to main before sprint close means the ticket is done —
+    # agents just forget to update status. Backlog/ready tickets were
+    # never started, so they stay as carry-over candidates.
+    picked_up_statuses = ("in_progress", "review")
+    picked_up = [t for t in incomplete if t["status"] in picked_up_statuses]
+    auto_closed = []
+    if picked_up:
+        conn = get_connection()
+        for t in picked_up:
+            conn.execute("UPDATE tickets SET status='done' WHERE id=?", (t["id"],))
+            auto_closed.append(t)
+        conn.commit()
+        conn.close()
+        # Move auto-closed into done count, remove from incomplete
+        done = done + auto_closed
+        incomplete = [t for t in incomplete if t["status"] not in picked_up_statuses]
+
+    # Complete the sprint
     conn = get_connection()
     conn.execute(
         "UPDATE sprints SET status='completed', end_date=date('now') WHERE id=?",
@@ -372,10 +390,14 @@ def cmd_stop(args):
     print(f"Done: {len(done)}/{len(tickets)}")
     if cancelled:
         print(f"Cancelled: {len(cancelled)}")
+    if auto_closed:
+        print(f"Auto-closed: {len(auto_closed)} tickets marked done on sprint close:")
+        for t in auto_closed:
+            print(f"  #{t['id']}: {t['title']} ({t['status']} → done)")
     print()
 
     if incomplete:
-        print("Carry-over candidates (incomplete):")
+        print("Carry-over candidates (never started):")
         format_ticket_table(incomplete)
         print()
 

db/connectors/ticket

@@ -14,7 +14,7 @@ Usage:
   ticket sprint assign <id> <sprint_id>
   ticket deps <id>
   ticket search <keyword>
-  ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T]
+  ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T] [--description TEXT]
   ticket epics [--status S]
   ticket children <id>
   ticket count [--status S]
@@ -256,9 +256,9 @@ def cmd_search(conn, keyword):
 
 
 def cmd_create(conn, args):
-    flags, positional = parse_flags(args, ["parent", "priority", "decision", "team"])
+    flags, positional = parse_flags(args, ["parent", "priority", "decision", "team", "description"])
     if len(positional) < 2:
-        out({"ok": False, "error": "Usage: ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T]"})
+        out({"ok": False, "error": "Usage: ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T] [--description TEXT]"})
         return
     ticket_type = positional[0]
     title = " ".join(positional[1:])
@@ -266,9 +266,10 @@ def cmd_create(conn, args):
     priority = flags.get("priority", "medium")
     decision_ref = flags.get("decision")
     team = flags.get("team")
+    description = flags.get("description")
     conn.execute(
-        "INSERT INTO tickets (type, title, parent_id, priority, decision_ref, team) VALUES (?, ?, ?, ?, ?, ?)",
-        (ticket_type, title, parent_id, priority, decision_ref, team))
+        "INSERT INTO tickets (type, title, description, parent_id, priority, decision_ref, team) VALUES (?, ?, ?, ?, ?, ?, ?)",
+        (ticket_type, title, description, parent_id, priority, decision_ref, team))
     conn.commit()
     last_id = query(conn, "SELECT last_insert_rowid() as id")[0]["id"]
     out({"ok": True, "id": last_id, "title": title})
@@ -330,7 +331,7 @@ Usage:
   ticket sprint assign <id> <sprint>  Assign ticket to sprint
   ticket deps <id>                    Show ticket dependencies
   ticket search <keyword>             Search tickets by title/description
-  ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T]
+  ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T] [--description TEXT]
   ticket epics [--status S]           List epics with child counts
   ticket children <id>                List children of a ticket
   ticket count [--status S]           Count tickets by status"""

docs/DEVOPS.md

@@ -69,6 +69,43 @@ make test-client        # gdUnit4 tests (headless runner pending)
 
 Server tests use Rust's built-in test framework with `#[cfg(test)]` inline tests and `tests/` integration tests (D-030). Client tests use gdUnit4 (D-030).
 
+### Cross-Encoder Fixtures
+
+```bash
+make fixtures           # Regenerate Rust->GDScript fixtures (server/tests/gen_fixtures.rs)
+make fixtures-client    # Generate GDScript->Rust fixtures + verify Rust decoder (#475)
+```
+
+The bidirectional protocol is validated by two sets of committed fixtures:
+- **Rust encodes, GDScript decodes:** `client/tests/fixtures/msgpack/` (generated by `make fixtures`)
+- **GDScript encodes, Rust decodes:** `server/tests/fixtures/gdscript/` (generated by `make fixtures-client`)
+
+Regenerate both after any protocol change. Commit the updated fixtures alongside the code change.
+
+**Troubleshooting fixture failures:**
+
+- **`make fixtures-client` fails with encode errors:** Check that `client/addons/messagepack/messagepack.gd` is up to date. The script exits non-zero on any encode failure.
+- **`gdscript_generated_fixtures_deserialize` fails:** Fixtures in `server/tests/fixtures/gdscript/` are stale or corrupted. Re-run `make fixtures-client` and commit the updated files.
+- **Fixture staleness in `make pre-pr`:** Protocol changed but fixtures were not regenerated. Run `make fixtures && make fixtures-client`, then commit both `client/tests/fixtures/` and `server/tests/fixtures/gdscript/`.
+
+### Golden File Management
+
+```bash
+make golden-diff        # Show diff if golden file output has changed
+make golden-update      # Regenerate golden file and stage for commit
+```
+
+The golden file (`server/tests/golden/proof_room_tick_10.json`) is a committed snapshot of ObserverSnapshot output after a deterministic 10-tick replay. It catches unintentional changes to simulation output.
+
+**Workflow after intentional simulation changes:**
+
+1. Run `make golden-diff` to see what changed
+2. Review the diff — confirm changes are expected
+3. Run `make golden-update` to regenerate and stage the new golden file
+4. Commit the updated golden file alongside your simulation change
+
+`golden-diff` exits 1 if the golden file has changed (useful in scripts). `golden-update` regenerates the file and runs `git add` but does not commit — the developer reviews and commits manually.
+
 ### Lint
 
 ```bash
@@ -130,6 +167,19 @@ make validate-content     # Validate content YAML against JSON schemas
 make check-fact-ids       # Check fact_id references against knowledge catalogs
 ```
 
+### Gauntlet Checklists
+
+```bash
+make checklist-validate   # Validate checklist YAML against schema (standalone)
+make checklist-generate   # Validate + print per-room condition summary
+```
+
+Checklists live at `content/gauntlet/rooms/{room_id}/checklist.yaml` (per-room) and `content/gauntlet/cross_room_checks.yaml` (cross-room). Each condition is evaluable from an `ObserverSnapshot`.
+
+7 condition types: `player_near`, `player_facing`, `entity_present`, `entity_absent`, `expected_monologue`, `expected_dialogue`, `expected_interaction_verb`.
+
+Schema: `content/_schema/checklist.schema.json`. The checklist format feeds into #503 (client auto-checklist progress tracking).
+
 `check-fact-ids` operates in two modes:
 - **Advisory** — when knowledge catalogs (`content/global/knowledge/*.yaml`) have no fact definitions yet: lists referenced fact_ids and exits cleanly.
 - **Enforcing** — when catalogs are populated: fails on any `fact_id` reference that doesn't match a canonical definition.

docs/assets/audio/ui.md

@@ -5,20 +5,20 @@ Interface sounds triggered by player interaction, insert systems, and cognitive
 ## Generation Approach
 
 - **All UI sounds:** Generated via Stable Audio Open with sonic family prefix prompts, then trimmed/normalized/converted via `audio-post pipeline`.
-- **Monologue chimes:** Currently PLACEHOLDER (Sprint 7). Redo scheduled next audio sprint (#453). Design brief below captures target register.
+- **Monologue chimes:** Re-generated in Sprint 9 (#453). Insert-tech prefix + Chimes template, 5s SAO generation trimmed to 0.8s.
 
 ## Assets
 
 | ID | Filename | Status | Bus | Method | Duration | Prompt/Notes | Sprint |
 |----|----------|--------|-----|--------|----------|-------------|--------|
-| UI-001 | `cursor_hover.ogg` | draft | UI Sounds | SAO | 50-100ms | Subtle tick/ping on entity hover (D-056). Insert-tech: clean, precise, synthetic. Almost subliminal — notice if missing, not if present. Needs trim to target duration (#453). | S7 #440 |
-| UI-002 | `implant_open.ogg` | draft | UI Sounds | SAO | 150-250ms | Rising tone when insert UI opens (radial menu, inventory, stance). Neural lattice powering up. Frequency sweep, harmonic shimmer. Needs trim (#453). | S7 #440 |
-| UI-003 | `fog_recognition.ogg` | draft | UI Sounds | SAO | 300-400ms | Warm organic chime at onset of cognitive delay (D-060). Character recognizing a person. Unresolved tone. Needs trim (#453). | S7 #440 |
-| UI-004 | `weapon_aim.ogg` | draft | UI Sounds | SAO | 100-150ms | Harder click/lock for weapon aim state. Mechanical, deliberate. SKETCH ONLY — no weapons in Sprint 7. Needs trim (#453). | S7 #440 |
-| UI-005 | `sfx_monologue_chime.ogg` | draft | UI Sounds | SAO | 500-1000ms | PLACEHOLDER. Soft crystalline tone, neural lattice surfacing a thought. Quiet, non-intrusive. Redo in next audio sprint (#453). See design brief below. | S7 #440 |
-| UI-006 | `sfx_monologue_chime_urgent.ogg` | draft | UI Sounds | SAO | 500-1000ms | PLACEHOLDER. Sharper variant for contradiction/anomaly. Brighter, more insistent. Redo in next audio sprint (#453). See design brief below. | S7 #440 |
-| UI-007 | `sfx_weapon_aim_lock.ogg` | draft | UI Sounds | SAO | 300-500ms | Sharp targeting lock-on confirmation for weapon aim. Clinical/dangerous, harder than general entity lock. Descending digital sweep with metallic precision click. | S8 #440 |
-| UI-008 | `sfx_stance_change.ogg` | draft | UI Sounds | SAO | 200-400ms | Soft mechanical mode-switch click for stance toggle (Walk/Sprint/Careful/Crouch). Subtle digital detent, nearly subliminal. Fires frequently — fatigue-safe. | S8 #440 |
+| UI-001 | `cursor_hover.ogg` | done | UI Sounds | SAO | 77ms | Subtle tick/ping on entity hover (D-056). Insert-tech: clean, precise, synthetic. Trimmed + normalized to 44.1kHz in S9 #453. | S7 #440, S9 #453 |
+| UI-002 | `implant_open.ogg` | done | UI Sounds | SAO | 217ms | Rising tone when insert UI opens (radial menu, inventory, stance). Neural lattice powering up. Trimmed + normalized in S9 #453. | S7 #440, S9 #453 |
+| UI-003 | `fog_recognition.ogg` | done | UI Sounds | SAO | 400ms | Warm organic chime at onset of cognitive delay (D-060). Re-generated in S9 — original was silent. Organic prefix + Chimes template. | S7 #440, S9 #453 |
+| UI-004 | `weapon_aim.ogg` | done | UI Sounds | SAO | 127ms | Harder click/lock for weapon aim state. Mechanical, deliberate. Trimmed + normalized in S9 #453. | S7 #440, S9 #453 |
+| UI-005 | `sfx_monologue_chime.ogg` | done | UI Sounds | SAO | 800ms | Re-generated in S9. Insert-tech prefix + Chimes template. Crystalline tone, neural lattice surfacing a thought. See design brief below. | S7 #440, S9 #453 |
+| UI-006 | `sfx_monologue_chime_urgent.ogg` | done | UI Sounds | SAO | 800ms | Re-generated in S9. Insert-tech prefix + Chimes template (sharper/brighter variant). CFG 8. See design brief below. | S7 #440, S9 #453 |
+| UI-007 | `sfx_weapon_aim_lock.ogg` | done | UI Sounds | SAO | 505ms | Sharp targeting lock-on confirmation for weapon aim. Downsampled to 44.1kHz + normalized in S9 #453. | S8 #440, S9 #453 |
+| UI-008 | `sfx_stance_change.ogg` | done | UI Sounds | SAO | 349ms | Soft mechanical mode-switch click for stance toggle. Downsampled to 44.1kHz + normalized in S9 #453. | S8 #440, S9 #453 |
 
 ## Mix Specs (not audio files)
 
@@ -65,9 +65,9 @@ These are AudioBus parameter changes, documented in `docs/audio/dialogue-ambient
 - **Integration:** stance_indicator.gd stance_changed signal → AudioManager.play_ui("sfx_stance_change")
 - **Cross-reference:** D-048 (neural insert feedback aesthetic), D-053 (movement stances)
 
-### UI-005 / UI-006: Monologue Chime Design Brief (PLACEHOLDER)
+### UI-005 / UI-006: Monologue Chime Design Brief
 
-**Target emotional register for Sprint 8 redo:**
+**Target emotional register (achieved Sprint 9 #453):**
 
 The monologue chimes are the two poles of augmented cognition made audible:
 
@@ -84,9 +84,9 @@ The monologue chimes are the two poles of augmented cognition made audible:
 
 **Quality bar:** If the urgent chime feels like a quest marker ping, it has failed. If it feels like Ubisoft, it has failed. The delta between normal and urgent = "someone thinking quietly" vs "someone's eyes going slightly wide."
 
-**Placeholder spec (Sprint 7):**
-- Normal: pure sine 1.2kHz, 600ms, gentle attack, natural decay. Conservative volume.
-- Urgent: sine 1.2kHz + harmonic 2.4kHz, 400ms, sharper attack, 15% louder.
-- Deliberately undersized — obviously temporary. Ugly placeholders get replaced.
+**Sprint 9 generation spec:**
+- Normal: SAO 5s generation (insert-tech prefix + chimes template), CFG 7, 100 steps. Trimmed to 0.8s (attack + initial decay). LUFS normalized to -16.
+- Urgent: SAO 5s generation (insert-tech prefix + chimes template, sharper/brighter descriptors), CFG 8, 100 steps. Trimmed to 0.8s. Stronger attack (-6.3dB peak vs -15.3dB normal), more sustained energy.
+- Both at 44.1kHz stereo, Vorbis q6 encoding.
 
-**Evaluation gate:** First internal playtest after Sprint 7: "Does the normal chime feel like a thought arriving? Does the urgent chime create a physiological response?" If no → trigger chime redesign.
+**Evaluation gate:** First internal playtest: "Does the normal chime feel like a thought arriving? Does the urgent chime create a physiological response?" If no → iterate with manual synthesis.

server/Cargo.lock

@@ -950,6 +950,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "serde_yaml"
 version = "0.9.34+deprecated"
@@ -975,6 +988,7 @@ dependencies = [
  "rand_chacha",
  "rmp-serde",
  "serde",
+ "serde_json",
  "serde_yaml",
  "thiserror",
  "tracing",
@@ -1373,3 +1387,9 @@ dependencies = [
  "quote",
  "syn",
 ]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"

server/Cargo.toml

@@ -16,3 +16,10 @@ pathfinding = "4.11"
 thiserror = "2"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+[features]
+default = ["gauntlet"]
+gauntlet = []
+
+[dev-dependencies]
+serde_json = "1"

server/src/knowledge/registry.rs

@@ -69,6 +69,19 @@ impl EntityRegistry {
         }
     }
 
+    /// Advance the next StableId counter to `target`.
+    /// Used to reserve StableId ranges for entities not yet spawned
+    /// (e.g., Gauntlet rooms built in later sprints).
+    /// Panics if `target` is less than the current next_id.
+    pub fn reserve_up_to(&mut self, target: u64) {
+        assert!(
+            target >= self.next_id,
+            "cannot reserve backwards: next_id={}, target={}",
+            self.next_id, target
+        );
+        self.next_id = target;
+    }
+
     /// Number of registered entities.
     pub fn len(&self) -> usize {
         self.by_entity.len()
@@ -229,6 +242,30 @@ mod tests {
         );
     }
 
+    #[test]
+    fn reserve_up_to_advances_counter() {
+        let mut world = World::new();
+        let mut registry = EntityRegistry::new(0);
+
+        let e1 = world.spawn_empty().id();
+        let id1 = registry.register(e1);
+        assert_eq!(id1, StableId(0));
+
+        // Reserve through 5 (skip IDs 1-4)
+        registry.reserve_up_to(5);
+
+        let e2 = world.spawn_empty().id();
+        let id2 = registry.register(e2);
+        assert_eq!(id2, StableId(5), "next ID after reserve should be 5");
+    }
+
+    #[test]
+    #[should_panic(expected = "cannot reserve backwards")]
+    fn reserve_up_to_panics_on_backwards() {
+        let mut registry = EntityRegistry::new(10);
+        registry.reserve_up_to(5);
+    }
+
     #[test]
     fn unregister_unknown_entity_is_noop() {
         // #469: Unregistering an entity that was never registered must not panic.

server/src/lib.rs

@@ -9,3 +9,7 @@ pub mod npc;
 pub mod perception;
 pub mod simulation;
 pub mod storyteller;
+// test_world::reset is always compiled (used by simulation::input).
+// Room definitions, constants, and setup_gauntlet are gated behind
+// the "gauntlet" feature (default-on) to allow stripping from release builds.
+pub mod test_world;

server/src/main.rs

@@ -114,8 +114,18 @@ fn main() {
     // Override SimRng with the chosen seed (SimulationPlugin defaults to seed 0)
     app.insert_resource(settled_reach_server::simulation::rng::SimRng::new(seed));
 
-    // Gauntlet content loader is future scope — proof room for all modes.
-    setup_proof_room(&mut app);
+    // Gauntlet test world for --test-mode, proof room for normal mode.
+    if test_mode {
+        #[cfg(feature = "gauntlet")]
+        settled_reach_server::test_world::setup_gauntlet(&mut app);
+        #[cfg(not(feature = "gauntlet"))]
+        {
+            eprintln!("--test-mode requires the 'gauntlet' feature");
+            std::process::exit(1);
+        }
+    } else {
+        setup_proof_room(&mut app);
+    }
 
     tracing::info!(
         "Simulation initialized (seed={}, test_mode={})",

server/src/simulation/input.rs

@@ -11,6 +11,7 @@ use crate::simulation::inventory::{
 use crate::simulation::movement::{MoveIntent, PlayerCharacter, TilePosition};
 use crate::simulation::stance::{PlayerMoveCooldown, Stance};
 use crate::simulation::time::{SimulationTime, TickRate};
+use crate::test_world::reset::{RoomResetTrigger, RoomSnapshots};
 use bevy_ecs::prelude::*;
 use std::collections::VecDeque;
 
@@ -91,6 +92,8 @@ pub fn process_player_input(
     >,
     inventory_items: Query<(Entity, &CarriedBy, &ItemName, &InventorySlot)>,
     all_positions: Query<&TilePosition>,
+    reset_triggers: Query<&RoomResetTrigger>,
+    mut room_snapshots: Option<ResMut<RoomSnapshots>>,
 ) {
     let current_tick = time.tick;
     let paused = time.paused();
@@ -193,6 +196,16 @@ pub fn process_player_input(
                         target_entity_id,
                     );
                 }
+                Some("Reset") => {
+                    handle_reset(
+                        &mut commands,
+                        &registry,
+                        &reset_triggers,
+                        &mut room_snapshots,
+                        target_entity_id,
+                        current_tick,
+                    );
+                }
                 _ => {
                     tracing::info!(
                         "Interact: target={:?}, verb={:?} — logged only",
@@ -438,6 +451,67 @@ fn handle_place(
     );
 }
 
+/// Handle Reset verb: restore a room's entities to their initial positions.
+/// Target entity must have a RoomResetTrigger component. Respects debounce.
+fn handle_reset(
+    commands: &mut Commands,
+    registry: &EntityRegistry,
+    reset_triggers: &Query<&RoomResetTrigger>,
+    room_snapshots: &mut Option<ResMut<RoomSnapshots>>,
+    target_entity_id: Option<u64>,
+    current_tick: u64,
+) {
+    let Some(target_id) = target_entity_id else {
+        tracing::warn!("Reset verb without target_entity_id");
+        return;
+    };
+
+    let Some(snapshots) = room_snapshots.as_mut() else {
+        tracing::warn!("Reset verb but RoomSnapshots resource not available");
+        return;
+    };
+
+    let target_stable = StableId(target_id);
+    let Some(target_entity) = registry.to_entity(&target_stable) else {
+        tracing::warn!(target_id, "Reset: target entity not in registry");
+        return;
+    };
+
+    let Ok(trigger) = reset_triggers.get(target_entity) else {
+        tracing::warn!(target_id, "Reset: target is not a reset trigger");
+        return;
+    };
+
+    let Some(changes) = snapshots.plan_reset(&trigger.room_name, current_tick) else {
+        tracing::info!(
+            room = trigger.room_name.as_str(),
+            "Reset: debounced or unknown room"
+        );
+        return;
+    };
+
+    let mut restored = 0;
+    for (entity, position, is_floor_item) in changes {
+        if is_floor_item {
+            commands
+                .entity(entity)
+                .remove::<CarriedBy>()
+                .remove::<InventorySlot>()
+                .insert(position);
+        } else {
+            commands.entity(entity).insert(position);
+        }
+        restored += 1;
+    }
+
+    tracing::info!(
+        room = trigger.room_name.as_str(),
+        restored,
+        current_tick,
+        "Room reset executed via Reset verb"
+    );
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -1396,4 +1470,224 @@ mod tests {
         schedule.add_systems(process_player_input);
         schedule.run(&mut world); // should not panic
     }
+
+    // === Room Reset Tests (#490) ===
+
+    #[test]
+    fn reset_verb_restores_floor_item() {
+        // #490: Take a floor item, then Reset verb restores it to original position.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<crate::knowledge::EntityRegistry>();
+
+        // Player
+        let player = world
+            .spawn((PlayerCharacter, TilePosition::new(5, 5, 0)))
+            .id();
+        let player_sid = world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(player);
+
+        // Floor item at (5, 4)
+        let item = world
+            .spawn((TilePosition::new(5, 4, 0), ItemName("Keycard".into())))
+            .id();
+        let item_sid = world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(item);
+
+        // Reset plate entity
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(plate);
+
+        // Record snapshot: item is a floor item at its original position
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", item, TilePosition::new(5, 4, 0), true);
+        world.insert_resource(snapshots);
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+
+        // Step 1: Take the item
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(item_sid.0),
+                verb: Some("Take".into()),
+            },
+        });
+        schedule.run(&mut world);
+
+        assert!(
+            world.get::<TilePosition>(item).is_none(),
+            "Item should be picked up"
+        );
+        assert_eq!(world.get::<CarriedBy>(item).unwrap().0, player_sid);
+
+        // Step 2: Reset via verb
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 1,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 1;
+        schedule.run(&mut world);
+
+        // Item should be back on the ground at original position
+        let pos = world
+            .get::<TilePosition>(item)
+            .expect("Item should be restored to ground");
+        assert_eq!(
+            *pos,
+            TilePosition::new(5, 4, 0),
+            "Item at original position"
+        );
+        assert!(
+            world.get::<CarriedBy>(item).is_none(),
+            "CarriedBy removed after reset"
+        );
+        assert!(
+            world.get::<InventorySlot>(item).is_none(),
+            "InventorySlot removed after reset"
+        );
+    }
+
+    #[test]
+    fn reset_verb_debounces() {
+        // #490: Reset debounce prevents rapid-fire resets.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<crate::knowledge::EntityRegistry>();
+
+        let _player = world
+            .spawn((PlayerCharacter, TilePosition::new(5, 5, 0)))
+            .id();
+
+        // NPC entity
+        let npc = world.spawn(TilePosition::new(10, 10, 0)).id();
+        world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(npc);
+
+        // Reset plate
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(plate);
+
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", npc, TilePosition::new(10, 10, 0), false);
+        world.insert_resource(snapshots);
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+
+        // First reset at tick 0 — should succeed
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        schedule.run(&mut world);
+
+        // Move NPC to verify debounce blocks second reset
+        *world.get_mut::<TilePosition>(npc).unwrap() = TilePosition::new(20, 20, 0);
+
+        // Second reset at tick 5 — should be debounced (< 10 ticks)
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 5,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 5;
+        schedule.run(&mut world);
+
+        // NPC should still be at moved position (reset was debounced)
+        assert_eq!(
+            world.get::<TilePosition>(npc).unwrap().x,
+            20,
+            "NPC not reset — debounced"
+        );
+
+        // Third reset at tick 10 — should succeed
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 10,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 10;
+        schedule.run(&mut world);
+
+        // NPC should be back at original position
+        assert_eq!(
+            world.get::<TilePosition>(npc).unwrap().x,
+            10,
+            "NPC reset after debounce elapsed"
+        );
+    }
+
+    #[test]
+    fn reset_verb_without_snapshots_is_noop() {
+        // Reset verb when no RoomSnapshots resource exists should not panic.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<crate::knowledge::EntityRegistry>();
+
+        world.spawn((PlayerCharacter, TilePosition::new(5, 5, 0)));
+
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world
+            .resource_mut::<crate::knowledge::EntityRegistry>()
+            .register(plate);
+
+        // No RoomSnapshots resource inserted — should be gracefully handled
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+        schedule.run(&mut world); // should not panic
+    }
 }

server/src/test_world/constants.rs

@@ -0,0 +1,325 @@
+//! Gauntlet room and entity constants — single source of truth.
+//!
+//! All Gauntlet tests and room builders reference these constants instead
+//! of magic numbers. Room geometry, observer positions, entity placements,
+//! and StableId ranges are defined here.
+//!
+//! Canonical spawn order determines StableId assignment. Do NOT reorder
+//! existing entries — append new rooms/entities at the end (additive-only).
+//!
+//! Specification source: gestalt-round3.md Section 7.
+
+use crate::bridge::types::FacingDirection;
+use crate::perception::vision_cone::Facing;
+use crate::simulation::movement::TilePosition;
+
+/// A Gauntlet room definition.
+#[derive(Debug, Clone)]
+pub struct GauntletRoom {
+    /// Room identifier string (e.g., "central_hub", "occlusion_corridor").
+    pub name: &'static str,
+    /// Top-left corner of the room (includes walls).
+    pub origin: TilePosition,
+    /// (width, height) in sim tiles (includes walls).
+    pub size: (i32, i32),
+    /// Player spawn position within this room (absolute coordinates).
+    pub spawn: TilePosition,
+    /// Golden file observer position (absolute coordinates).
+    pub observer: TilePosition,
+    /// Direction the observer faces for golden file snapshots.
+    pub observer_facing: Facing,
+    /// Reset plate location (if any). Only present in rooms with
+    /// corridor entrances (not the hub).
+    pub reset_plate: Option<TilePosition>,
+}
+
+/// A Gauntlet entity definition.
+#[derive(Debug, Clone)]
+pub struct GauntletEntity {
+    /// Entity name (e.g., "npc_guard_visible", "crate_01").
+    pub name: &'static str,
+    /// Which room this entity belongs to.
+    pub room: &'static str,
+    /// Absolute position in the Gauntlet map.
+    pub position: TilePosition,
+    /// Entity kind for classification.
+    pub kind: EntityKind,
+    /// StableId assigned to this entity.
+    pub stable_id: u64,
+}
+
+/// Entity classification for Gauntlet test entities.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum EntityKind {
+    Sign,
+    Npc,
+    Object,
+}
+
+// ============================================================
+// Room constants — canonical spawn order
+// ============================================================
+
+pub const HUB: GauntletRoom = GauntletRoom {
+    name: "central_hub",
+    origin: TilePosition { x: 38, y: 46, z: 0 },
+    size: (24, 24),
+    spawn: TilePosition { x: 50, y: 58, z: 0 },
+    observer: TilePosition { x: 50, y: 58, z: 0 },
+    observer_facing: Facing(FacingDirection::North),
+    reset_plate: None,
+};
+
+pub const FOG_THEATER: GauntletRoom = GauntletRoom {
+    name: "fog_theater",
+    origin: TilePosition { x: 28, y: 2, z: 0 },
+    size: (44, 32),
+    spawn: TilePosition { x: 56, y: 18, z: 0 },
+    observer: TilePosition { x: 56, y: 18, z: 0 },
+    observer_facing: Facing(FacingDirection::South),
+    reset_plate: Some(TilePosition { x: 50, y: 34, z: 0 }),
+};
+
+pub const OCCLUSION_CORRIDOR: GauntletRoom = GauntletRoom {
+    name: "occlusion_corridor",
+    origin: TilePosition { x: 74, y: 48, z: 0 },
+    size: (42, 22),
+    spawn: TilePosition { x: 84, y: 58, z: 0 },
+    observer: TilePosition { x: 84, y: 58, z: 0 },
+    observer_facing: Facing(FacingDirection::East),
+    reset_plate: Some(TilePosition { x: 73, y: 58, z: 0 }),
+};
+
+pub const INVENTORY_WAREHOUSE: GauntletRoom = GauntletRoom {
+    name: "inventory_warehouse",
+    origin: TilePosition { x: 2, y: 40, z: 0 },
+    size: (30, 28),
+    spawn: TilePosition { x: 17, y: 54, z: 0 },
+    observer: TilePosition { x: 17, y: 54, z: 0 },
+    observer_facing: Facing(FacingDirection::East),
+    reset_plate: Some(TilePosition { x: 33, y: 58, z: 0 }),
+};
+
+pub const INTERACTION_GALLERY: GauntletRoom = GauntletRoom {
+    name: "interaction_gallery",
+    origin: TilePosition { x: 2, y: 82, z: 0 },
+    size: (24, 20),
+    spawn: TilePosition { x: 14, y: 92, z: 0 },
+    observer: TilePosition { x: 14, y: 92, z: 0 },
+    observer_facing: Facing(FacingDirection::East),
+    reset_plate: Some(TilePosition { x: 14, y: 82, z: 0 }),
+};
+
+pub const PAUSE_CHAMBER: GauntletRoom = GauntletRoom {
+    name: "pause_chamber",
+    origin: TilePosition { x: 42, y: 78, z: 0 },
+    size: (16, 16),
+    spawn: TilePosition { x: 50, y: 86, z: 0 },
+    observer: TilePosition { x: 50, y: 86, z: 0 },
+    observer_facing: Facing(FacingDirection::North),
+    reset_plate: Some(TilePosition { x: 50, y: 77, z: 0 }),
+};
+
+pub const DIALOGUE_ROOM: GauntletRoom = GauntletRoom {
+    name: "dialogue_room",
+    origin: TilePosition { x: 36, y: 104, z: 0 },
+    size: (28, 20),
+    spawn: TilePosition { x: 50, y: 114, z: 0 },
+    observer: TilePosition { x: 50, y: 114, z: 0 },
+    observer_facing: Facing(FacingDirection::North),
+    reset_plate: Some(TilePosition { x: 50, y: 103, z: 0 }),
+};
+
+pub const CROWD_PLAZA: GauntletRoom = GauntletRoom {
+    name: "crowd_plaza",
+    origin: TilePosition { x: 80, y: 78, z: 0 },
+    size: (32, 32),
+    spawn: TilePosition { x: 96, y: 94, z: 0 },
+    observer: TilePosition { x: 96, y: 94, z: 0 },
+    observer_facing: Facing(FacingDirection::West),
+    reset_plate: Some(TilePosition { x: 80, y: 86, z: 0 }),
+};
+
+/// All rooms in canonical spawn order.
+/// THIS ORDER DETERMINES STABLEID ASSIGNMENT.
+/// Do not reorder existing entries. Append new rooms at the end.
+pub const ROOMS: &[GauntletRoom] = &[
+    HUB,
+    FOG_THEATER,
+    OCCLUSION_CORRIDOR,
+    INVENTORY_WAREHOUSE,
+    INTERACTION_GALLERY,
+    PAUSE_CHAMBER,
+    DIALOGUE_ROOM,
+    CROWD_PLAZA,
+];
+
+/// Look up which room a position falls in.
+/// Returns the first room whose bounding box contains the position.
+///
+/// Assumptions:
+///   - All rooms are at z=0 (single-floor Gauntlet). Positions on other
+///     z-levels will never match.
+///   - Room bounding boxes must not overlap (verified by `rooms_do_not_overlap`
+///     test). Corridors are NOT rooms and intentionally fall outside all
+///     bounding boxes — `room_at` returns None for corridor positions.
+pub fn room_at(pos: &TilePosition) -> Option<&'static GauntletRoom> {
+    ROOMS.iter().find(|r| {
+        pos.x >= r.origin.x
+            && pos.x < r.origin.x + r.size.0
+            && pos.y >= r.origin.y
+            && pos.y < r.origin.y + r.size.1
+            && pos.z == r.origin.z
+    })
+}
+
+// ============================================================
+// StableId range constants
+// ============================================================
+
+/// Player entity always gets StableId 0.
+pub const PLAYER_STABLE_ID: u64 = 0;
+
+/// StableId ranges per room (start, end inclusive).
+pub const HUB_STABLE_IDS: (u64, u64) = (1, 4);
+pub const FOG_THEATER_STABLE_IDS: (u64, u64) = (5, 8);
+pub const OCCLUSION_STABLE_IDS: (u64, u64) = (9, 12);
+pub const INVENTORY_STABLE_IDS: (u64, u64) = (13, 23);
+pub const INTERACTION_GALLERY_STABLE_IDS: (u64, u64) = (24, 28);
+pub const PAUSE_CHAMBER_STABLE_IDS: (u64, u64) = (29, 29);
+pub const DIALOGUE_ROOM_STABLE_IDS: (u64, u64) = (30, 33);
+pub const CROWD_PLAZA_STABLE_IDS: (u64, u64) = (34, 48);
+pub const RESET_PLATE_STABLE_IDS: (u64, u64) = (49, 51);
+
+/// Number of actively-spawned entities in the current Gauntlet build.
+/// Derived from StableId ranges of built rooms + player + reset plates.
+/// Reserved (unbuilt) rooms do not contribute entities.
+pub const EXPECTED_ENTITY_COUNT: usize = 1 // player (StableId 0)
+    + (HUB_STABLE_IDS.1 - HUB_STABLE_IDS.0 + 1) as usize
+    + (OCCLUSION_STABLE_IDS.1 - OCCLUSION_STABLE_IDS.0 + 1) as usize
+    + (INVENTORY_STABLE_IDS.1 - INVENTORY_STABLE_IDS.0 + 1) as usize
+    + (PAUSE_CHAMBER_STABLE_IDS.1 - PAUSE_CHAMBER_STABLE_IDS.0 + 1) as usize
+    + (RESET_PLATE_STABLE_IDS.1 - RESET_PLATE_STABLE_IDS.0 + 1) as usize;
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn room_at_finds_hub() {
+        let pos = TilePosition { x: 50, y: 58, z: 0 };
+        let room = room_at(&pos).expect("Hub center should be in a room");
+        assert_eq!(room.name, "central_hub");
+    }
+
+    #[test]
+    fn room_at_finds_occlusion_corridor() {
+        let pos = TilePosition { x: 84, y: 58, z: 0 };
+        let room = room_at(&pos).expect("Occlusion observer should be in a room");
+        assert_eq!(room.name, "occlusion_corridor");
+    }
+
+    #[test]
+    fn room_at_finds_inventory_warehouse() {
+        let pos = TilePosition { x: 17, y: 54, z: 0 };
+        let room = room_at(&pos).expect("Inventory observer should be in a room");
+        assert_eq!(room.name, "inventory_warehouse");
+    }
+
+    #[test]
+    fn room_at_finds_pause_chamber() {
+        let pos = TilePosition { x: 50, y: 86, z: 0 };
+        let room = room_at(&pos).expect("Pause observer should be in a room");
+        assert_eq!(room.name, "pause_chamber");
+    }
+
+    #[test]
+    fn room_at_returns_none_for_corridor() {
+        // Point inside corridor-E (between Hub and Occlusion)
+        let pos = TilePosition { x: 66, y: 57, z: 0 };
+        assert!(room_at(&pos).is_none(), "Corridor should not be in any room");
+    }
+
+    #[test]
+    fn room_at_returns_none_for_outside_map() {
+        let pos = TilePosition { x: 200, y: 200, z: 0 };
+        assert!(room_at(&pos).is_none());
+    }
+
+    #[test]
+    fn all_rooms_in_correct_order() {
+        assert_eq!(ROOMS.len(), 8);
+        assert_eq!(ROOMS[0].name, "central_hub");
+        assert_eq!(ROOMS[1].name, "fog_theater");
+        assert_eq!(ROOMS[2].name, "occlusion_corridor");
+        assert_eq!(ROOMS[3].name, "inventory_warehouse");
+        assert_eq!(ROOMS[4].name, "interaction_gallery");
+        assert_eq!(ROOMS[5].name, "pause_chamber");
+        assert_eq!(ROOMS[6].name, "dialogue_room");
+        assert_eq!(ROOMS[7].name, "crowd_plaza");
+    }
+
+    #[test]
+    fn rooms_do_not_overlap() {
+        for (i, a) in ROOMS.iter().enumerate() {
+            for (j, b) in ROOMS.iter().enumerate() {
+                if i >= j {
+                    continue;
+                }
+                let overlap_x = a.origin.x < b.origin.x + b.size.0
+                    && a.origin.x + a.size.0 > b.origin.x;
+                let overlap_y = a.origin.y < b.origin.y + b.size.1
+                    && a.origin.y + a.size.1 > b.origin.y;
+                assert!(
+                    !(overlap_x && overlap_y),
+                    "Rooms {} and {} overlap",
+                    a.name, b.name
+                );
+            }
+        }
+    }
+
+    #[test]
+    fn observer_inside_room() {
+        for room in ROOMS {
+            let obs = &room.observer;
+            assert!(
+                obs.x >= room.origin.x && obs.x < room.origin.x + room.size.0,
+                "Observer x={} outside room {} (origin.x={}, width={})",
+                obs.x, room.name, room.origin.x, room.size.0
+            );
+            assert!(
+                obs.y >= room.origin.y && obs.y < room.origin.y + room.size.1,
+                "Observer y={} outside room {} (origin.y={}, height={})",
+                obs.y, room.name, room.origin.y, room.size.1
+            );
+        }
+    }
+
+    #[test]
+    fn stable_id_ranges_non_overlapping() {
+        let ranges = [
+            HUB_STABLE_IDS,
+            FOG_THEATER_STABLE_IDS,
+            OCCLUSION_STABLE_IDS,
+            INVENTORY_STABLE_IDS,
+            INTERACTION_GALLERY_STABLE_IDS,
+            PAUSE_CHAMBER_STABLE_IDS,
+            DIALOGUE_ROOM_STABLE_IDS,
+            CROWD_PLAZA_STABLE_IDS,
+            RESET_PLATE_STABLE_IDS,
+        ];
+        for (i, a) in ranges.iter().enumerate() {
+            for (j, b) in ranges.iter().enumerate() {
+                if i >= j {
+                    continue;
+                }
+                assert!(
+                    a.1 < b.0 || b.1 < a.0,
+                    "StableId ranges {} and {} overlap: {:?} vs {:?}",
+                    i, j, a, b
+                );
+            }
+        }
+    }
+}

server/src/test_world/mod.rs

@@ -0,0 +1,366 @@
+//! Gauntlet test world — purpose-built rooms for systematic QA testing.
+//!
+//! NOT production content. This module provides deterministic room layouts
+//! with precise entity placement for golden file testing, regression testing,
+//! and manual QA sessions. Loaded instead of content/ when the server runs
+//! the Gauntlet map.
+//!
+//! Module structure:
+//!   - `reset` — always compiled (used by simulation::input in production)
+//!   - `constants`, `rooms`, `setup_gauntlet` — gated behind "gauntlet" feature
+//!     (default-on; strip with --no-default-features for release builds)
+//!
+//! Architecture (per workshop-outcomes.md Section 4):
+//!   - Rooms are defined as Rust builder functions (hybrid YAML + Rust inject)
+//!   - WalkabilityMap covers the full Gauntlet bounds (0-116 x 0-124)
+//!   - Entities spawned in canonical order → StableId assignment is deterministic
+//!   - Additive-only: existing rooms/entities never reordered
+//!
+//! StableId ranges (from gestalt-round3.md):
+//!   Player: 0
+//!   Hub signs: 1-4
+//!   Fog Theater: 5-8 (reserved, not yet built)
+//!   Occlusion Corridor: 9-12
+//!   Inventory Warehouse: 13-23
+//!   Interaction Gallery: 24-28 (reserved, not yet built)
+//!   Pause Chamber: 29
+//!   Dialogue Room: 30-33 (reserved, not yet built)
+//!   Crowd Plaza: 34-48 (reserved, not yet built)
+//!   Reset plates: 49-51 (Occlusion, Inventory, Pause)
+
+#[cfg(feature = "gauntlet")]
+pub mod constants;
+pub mod reset;
+#[cfg(feature = "gauntlet")]
+pub mod rooms;
+
+#[cfg(feature = "gauntlet")]
+use bevy_app::prelude::*;
+
+#[cfg(feature = "gauntlet")]
+use crate::knowledge::registry::{EntityRegistry, StableEntityId};
+#[cfg(feature = "gauntlet")]
+use crate::knowledge::KnowledgeGraph;
+#[cfg(feature = "gauntlet")]
+use crate::knowledge::types::StableId;
+#[cfg(feature = "gauntlet")]
+use crate::perception::cognitive_delay::CognitiveDelay;
+#[cfg(feature = "gauntlet")]
+use crate::perception::vision_cone::Facing;
+#[cfg(feature = "gauntlet")]
+use crate::simulation::interaction::{Interactable, NearbyInteractionBuffer};
+#[cfg(feature = "gauntlet")]
+use crate::simulation::inventory::ItemName;
+#[cfg(feature = "gauntlet")]
+use crate::simulation::listening::ListeningFocus;
+#[cfg(feature = "gauntlet")]
+use crate::simulation::monologue::{MonologueBuffer, MonologueState, SprintAnomalyQueue};
+#[cfg(feature = "gauntlet")]
+use crate::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
+#[cfg(feature = "gauntlet")]
+use crate::simulation::stance::{MovementProfile, PlayerMoveCooldown};
+
+#[cfg(feature = "gauntlet")]
+use reset::{RoomResetTrigger, RoomSnapshots};
+
+#[cfg(feature = "gauntlet")]
+/// Map bounds for the full Gauntlet world.
+pub const MAP_WIDTH: i32 = 117;
+#[cfg(feature = "gauntlet")]
+pub const MAP_HEIGHT: i32 = 125;
+
+/// Set up the Gauntlet test world.
+///
+/// Creates the full WalkabilityMap (blocked by default), carves room
+/// interiors and corridors, spawns the player and all room entities
+/// in canonical StableId order.
+///
+/// NOTE: This bypasses the normal startup system scheduler — entities are
+/// spawned directly into the World rather than via startup systems. This
+/// is intentional for deterministic test setups but should be revisited
+/// if Gauntlet is ever served by the production startup pipeline.
+#[cfg(feature = "gauntlet")]
+pub fn setup_gauntlet(app: &mut App) {
+    // Start with a fully blocked map, then carve rooms and corridors.
+    let mut walkability = WalkabilityMap::new_blocked(MAP_WIDTH, MAP_HEIGHT, 1);
+
+    // Carve room interiors (2-tile-thick walls → interior starts 2 tiles in)
+    carve_room_interior(&mut walkability, 38, 46, 24, 24); // Hub
+    carve_room_interior(&mut walkability, 74, 48, 42, 22); // Occlusion Corridor
+    carve_room_interior(&mut walkability, 2, 40, 30, 28); // Inventory Warehouse
+    carve_room_interior(&mut walkability, 42, 78, 16, 16); // Pause Chamber
+
+    // Carve corridors between hub and rooms
+    carve_corridor(&mut walkability, 62, 55, 12, 6); // corridor-E: Hub ↔ Occlusion
+    carve_corridor(&mut walkability, 32, 55, 6, 6); // corridor-W: Hub ↔ Inventory
+    carve_corridor(&mut walkability, 47, 70, 6, 8); // corridor-S: Hub ↔ Pause Chamber
+
+    // Set up Occlusion Corridor walls (relative positions converted to absolute)
+    // North wall segment: rel x=[14,22], y=[6,7] — blocks LOS to npc_hidden_wall
+    for x in 88..=96 {
+        for y in 54..=55 {
+            walkability.set_walkable(&TilePosition::new(x, y, 0), false);
+        }
+    }
+    // South alcove walls: rel x=[4,8], y=[12,13]
+    for x in 78..=82 {
+        for y in 60..=61 {
+            walkability.set_walkable(&TilePosition::new(x, y, 0), false);
+        }
+    }
+
+    app.insert_resource(walkability);
+
+    // Entity spawning in canonical StableId order.
+    // Player gets StableId 0, then entities by room in workshop order.
+    let mut registry = EntityRegistry::new(0);
+
+    // --- Player (StableId 0) ---
+    // Spawn at Hub center: absolute (50, 58)
+    let profile = MovementProfile::smuggler();
+    let player_pos = TilePosition::new(50, 58, 0);
+    let player = app
+        .world_mut()
+        .spawn((
+            PlayerCharacter,
+            player_pos,
+            Facing::default(),
+            KnowledgeGraph::new(),
+            NearbyInteractionBuffer::default(),
+            MonologueState::default(),
+            MonologueBuffer::default(),
+            SprintAnomalyQueue::default(),
+            CognitiveDelay::default(),
+            ListeningFocus::new(player_pos),
+            profile,
+            profile.initial_stance(),
+            PlayerMoveCooldown::default(),
+        ))
+        .id();
+    registry.register(player);
+
+    // --- Hub signs (StableId 1-4) ---
+    rooms::hub::spawn_entities(app, &mut registry);
+
+    // --- Fog Theater (StableId 5-8) — reserved, not yet built ---
+    registry.reserve_up_to(9);
+
+    // --- Occlusion Corridor (StableId 9-12) ---
+    rooms::occlusion_corridor::spawn_entities(app, &mut registry);
+
+    // --- Inventory Warehouse (StableId 13-23) ---
+    rooms::inventory_warehouse::spawn_entities(app, &mut registry);
+
+    // --- Interaction Gallery (StableId 24-28) — reserved, not yet built ---
+    registry.reserve_up_to(29);
+
+    // --- Pause Chamber (StableId 29) ---
+    rooms::pause_chamber::spawn_entities(app, &mut registry);
+
+    // --- Dialogue Room (StableId 30-33) — reserved, not yet built ---
+    // --- Crowd Plaza (StableId 34-48) — reserved, not yet built ---
+    registry.reserve_up_to(49);
+
+    // --- Reset plates (StableId 49-51) ---
+    // Spawned at corridor entrances per workshop-outcomes.md Section 8.
+    // Each plate triggers reset of its associated room.
+    let reset_plates: &[(&str, TilePosition)] = &[
+        ("occlusion_corridor", constants::OCCLUSION_CORRIDOR.reset_plate.expect("occlusion_corridor should have a reset_plate")),
+        ("inventory_warehouse", constants::INVENTORY_WAREHOUSE.reset_plate.expect("inventory_warehouse should have a reset_plate")),
+        ("pause_chamber", constants::PAUSE_CHAMBER.reset_plate.expect("pause_chamber should have a reset_plate")),
+    ];
+    for &(room_name, pos) in reset_plates {
+        let entity = app
+            .world_mut()
+            .spawn((
+                Interactable,
+                RoomResetTrigger {
+                    room_name: room_name.to_string(),
+                },
+                pos,
+            ))
+            .id();
+        let sid = registry.register(entity);
+        app.world_mut()
+            .entity_mut(entity)
+            .insert(StableEntityId(sid));
+    }
+
+    // --- Populate RoomSnapshots for reset mechanism (#490) ---
+    let mut snapshots = RoomSnapshots::default();
+
+    // Occlusion Corridor entities (StableId 9-12): NPCs only, no floor items
+    for id in 9..=12 {
+        if let Some(entity) = registry.to_entity(&StableId(id)) {
+            if let Some(pos) = app.world().get::<TilePosition>(entity) {
+                snapshots.record("occlusion_corridor", entity, *pos, false);
+            }
+        }
+    }
+
+    // Inventory Warehouse entities (StableId 13-23): crates are floor items, NPC is not
+    for id in 13..=23 {
+        if let Some(entity) = registry.to_entity(&StableId(id)) {
+            if let Some(pos) = app.world().get::<TilePosition>(entity) {
+                let is_floor_item = app.world().get::<ItemName>(entity).is_some();
+                snapshots.record("inventory_warehouse", entity, *pos, is_floor_item);
+            }
+        }
+    }
+
+    // Pause Chamber entity (StableId 29): NPC only
+    if let Some(entity) = registry.to_entity(&StableId(29)) {
+        if let Some(pos) = app.world().get::<TilePosition>(entity) {
+            snapshots.record("pause_chamber", entity, *pos, false);
+        }
+    }
+
+    app.insert_resource(snapshots);
+    app.insert_resource(registry);
+}
+
+#[cfg(feature = "gauntlet")]
+/// Carve the walkable interior of a room.
+/// Room has 2-tile-thick walls; interior starts 2 tiles inside each boundary.
+fn carve_room_interior(wm: &mut WalkabilityMap, ox: i32, oy: i32, w: i32, h: i32) {
+    for y in (oy + 2)..(oy + h - 2) {
+        for x in (ox + 2)..(ox + w - 2) {
+            wm.set_walkable(&TilePosition::new(x, y, 0), true);
+        }
+    }
+}
+
+#[cfg(feature = "gauntlet")]
+/// Carve a corridor as a fully walkable rectangle.
+/// Corridors are 6 tiles wide with walls on both sides — we carve the
+/// interior 2 tiles in from each edge (leaving 2-tile walkable center).
+/// For narrow corridors (width=6), interior is 2 tiles wide.
+fn carve_corridor(wm: &mut WalkabilityMap, ox: i32, oy: i32, w: i32, h: i32) {
+    // Corridors are fully walkable rectangles (wall tiles are the
+    // surrounding room/map boundary). Carve interior with 1-tile margin.
+    for y in (oy + 1)..(oy + h - 1) {
+        for x in (ox + 1)..(ox + w - 1) {
+            wm.set_walkable(&TilePosition::new(x, y, 0), true);
+        }
+    }
+}
+
+#[cfg(all(test, feature = "gauntlet"))]
+mod tests {
+    use super::*;
+    use crate::knowledge::registry::EntityRegistry;
+
+    #[test]
+    fn gauntlet_setup_creates_expected_entities() {
+        let mut app = App::new();
+        app.add_plugins(crate::simulation::SimulationPlugin);
+        app.add_plugins(crate::knowledge::KnowledgePlugin);
+        app.add_plugins(crate::npc::NpcPlugin);
+
+        setup_gauntlet(&mut app);
+
+        let registry = app.world().resource::<EntityRegistry>();
+        assert_eq!(
+            registry.len(),
+            constants::EXPECTED_ENTITY_COUNT,
+            "entity count should match EXPECTED_ENTITY_COUNT derived from StableId ranges"
+        );
+    }
+
+    #[test]
+    fn hub_center_is_walkable() {
+        let mut app = App::new();
+        app.add_plugins(crate::simulation::SimulationPlugin);
+        app.add_plugins(crate::knowledge::KnowledgePlugin);
+        app.add_plugins(crate::npc::NpcPlugin);
+
+        setup_gauntlet(&mut app);
+
+        let wm = app.world().resource::<WalkabilityMap>();
+        // Hub center at (50, 58) must be walkable
+        assert!(wm.can_move_to(&TilePosition::new(50, 58, 0)));
+    }
+
+    #[test]
+    fn occlusion_north_wall_blocks() {
+        let mut app = App::new();
+        app.add_plugins(crate::simulation::SimulationPlugin);
+        app.add_plugins(crate::knowledge::KnowledgePlugin);
+        app.add_plugins(crate::npc::NpcPlugin);
+
+        setup_gauntlet(&mut app);
+
+        let wm = app.world().resource::<WalkabilityMap>();
+        // North wall segment at absolute (90, 54) should be blocked
+        assert!(!wm.can_move_to(&TilePosition::new(90, 54, 0)));
+        // But the corridor interior at (90, 56) should be walkable
+        assert!(wm.can_move_to(&TilePosition::new(90, 56, 0)));
+    }
+
+    #[test]
+    fn corridor_connects_hub_to_occlusion() {
+        let mut app = App::new();
+        app.add_plugins(crate::simulation::SimulationPlugin);
+        app.add_plugins(crate::knowledge::KnowledgePlugin);
+        app.add_plugins(crate::npc::NpcPlugin);
+
+        setup_gauntlet(&mut app);
+
+        let wm = app.world().resource::<WalkabilityMap>();
+        // corridor-E center should be walkable
+        assert!(wm.can_move_to(&TilePosition::new(66, 57, 0)));
+    }
+
+    #[test]
+    fn stable_id_ranges_match_spec() {
+        let mut app = App::new();
+        app.add_plugins(crate::simulation::SimulationPlugin);
+        app.add_plugins(crate::knowledge::KnowledgePlugin);
+        app.add_plugins(crate::npc::NpcPlugin);
+
+        setup_gauntlet(&mut app);
+
+        let registry = app.world().resource::<EntityRegistry>();
+
+        // Player at StableId 0
+        use crate::knowledge::types::StableId;
+        assert!(registry.to_entity(&StableId(0)).is_some(), "Player at StableId 0");
+
+        // Hub signs at 1-4
+        for id in 1..=4 {
+            assert!(registry.to_entity(&StableId(id)).is_some(), "Hub sign at StableId {}", id);
+        }
+
+        // Fog Theater 5-8 reserved (no entities)
+        for id in 5..=8 {
+            assert!(registry.to_entity(&StableId(id)).is_none(), "Fog Theater {} reserved", id);
+        }
+
+        // Occlusion Corridor at 9-12
+        for id in 9..=12 {
+            assert!(registry.to_entity(&StableId(id)).is_some(), "Occlusion at StableId {}", id);
+        }
+
+        // Inventory Warehouse at 13-23
+        for id in 13..=23 {
+            assert!(registry.to_entity(&StableId(id)).is_some(), "Inventory at StableId {}", id);
+        }
+
+        // Interaction Gallery 24-28 reserved
+        for id in 24..=28 {
+            assert!(registry.to_entity(&StableId(id)).is_none(), "Gallery {} reserved", id);
+        }
+
+        // Pause Chamber at 29
+        assert!(registry.to_entity(&StableId(29)).is_some(), "Pause Chamber at StableId 29");
+
+        // Reset plates at 49-51
+        for id in constants::RESET_PLATE_STABLE_IDS.0..=constants::RESET_PLATE_STABLE_IDS.1 {
+            assert!(
+                registry.to_entity(&StableId(id)).is_some(),
+                "Reset plate at StableId {}",
+                id
+            );
+        }
+    }
+}

server/src/test_world/reset.rs

@@ -0,0 +1,207 @@
+//! Room reset trigger mechanism (#490).
+//!
+//! Restores a room's entities to their initial positions when the player
+//! interacts with a reset plate. Used during Gauntlet QA sessions to
+//! re-test a room without restarting the server.
+//!
+//! Components:
+//!   - `RoomResetTrigger` — marks an entity as a reset plate for a room
+//!
+//! Resource:
+//!   - `RoomSnapshots` — stores tick-0 entity positions per room
+//!
+//! Production path: `plan_reset` returns planned changes as a Vec, which
+//! the input system applies via Commands (see simulation::input). This
+//! avoids exclusive World access and is scheduler-friendly.
+//!
+//! Spec (workshop-outcomes.md Section 8):
+//!   - Trigger: Interact with reset plate entity (verb "Reset")
+//!   - Resets: entity positions, carried items from room returned to floor
+//!   - Does NOT reset: other rooms, player position, session timer, SimRng
+//!   - Debounce: 10-tick cooldown per room
+
+use bevy_ecs::prelude::*;
+use std::collections::BTreeMap;
+
+use crate::simulation::movement::TilePosition;
+
+/// Debounce cooldown in ticks between resets of the same room.
+pub const RESET_DEBOUNCE_TICKS: u64 = 10;
+
+/// Marks an entity as a room reset trigger (reset plate).
+/// The player interacts with this entity using the "Reset" verb
+/// to restore the room to its initial state.
+#[derive(Component, Debug, Clone)]
+pub struct RoomResetTrigger {
+    pub room_name: String,
+}
+
+/// Snapshot of a single entity's initial position.
+#[derive(Debug, Clone)]
+struct EntitySnapshot {
+    entity: Entity,
+    position: TilePosition,
+    /// Whether this entity was a floor item (had TilePosition + ItemName at spawn).
+    is_floor_item: bool,
+}
+
+/// Per-room initial state snapshot.
+#[derive(Debug, Clone, Default)]
+struct RoomSnapshotData {
+    entities: Vec<EntitySnapshot>,
+}
+
+/// Resource holding initial entity state per room and debounce tracking.
+#[derive(Resource, Debug, Default)]
+pub struct RoomSnapshots {
+    snapshots: BTreeMap<String, RoomSnapshotData>,
+    last_reset_tick: BTreeMap<String, u64>,
+}
+
+impl RoomSnapshots {
+    /// Record the initial position of an entity in a room.
+    pub fn record(&mut self, room_name: &str, entity: Entity, position: TilePosition, is_floor_item: bool) {
+        self.snapshots
+            .entry(room_name.to_string())
+            .or_default()
+            .entities
+            .push(EntitySnapshot {
+                entity,
+                position,
+                is_floor_item,
+            });
+    }
+
+    /// Check if a reset is allowed (debounce check).
+    pub fn can_reset(&self, room_name: &str, current_tick: u64) -> bool {
+        match self.last_reset_tick.get(room_name) {
+            Some(&last) => current_tick >= last + RESET_DEBOUNCE_TICKS,
+            None => true,
+        }
+    }
+
+    /// Plan a room reset for use with Commands (system-friendly).
+    /// Returns the list of (entity, position, is_floor_item) changes to apply,
+    /// or None if debounced or unknown room. Updates debounce tracking.
+    ///
+    /// This is the canonical production API — the input system applies the
+    /// returned changes via Commands to avoid exclusive World access.
+    pub fn plan_reset(
+        &mut self,
+        room_name: &str,
+        current_tick: u64,
+    ) -> Option<Vec<(Entity, TilePosition, bool)>> {
+        if !self.can_reset(room_name, current_tick) {
+            return None;
+        }
+
+        let snapshot = self.snapshots.get(room_name)?;
+        let changes: Vec<_> = snapshot
+            .entities
+            .iter()
+            .map(|s| (s.entity, s.position, s.is_floor_item))
+            .collect();
+
+        self.last_reset_tick
+            .insert(room_name.to_string(), current_tick);
+
+        Some(changes)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn plan_reset_returns_correct_changes() {
+        let mut world = World::new();
+        let entity = world.spawn(TilePosition::new(10, 20, 0)).id();
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", entity, TilePosition::new(10, 20, 0), false);
+
+        let changes = snapshots.plan_reset("test_room", 0);
+        assert!(changes.is_some());
+        let changes = changes.unwrap();
+        assert_eq!(changes.len(), 1);
+        assert_eq!(changes[0].0, entity);
+        assert_eq!(changes[0].1, TilePosition::new(10, 20, 0));
+        assert!(!changes[0].2); // not a floor item
+    }
+
+    #[test]
+    fn plan_reset_includes_floor_items() {
+        let mut world = World::new();
+        let item = world.spawn(TilePosition::new(5, 5, 0)).id();
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("warehouse", item, TilePosition::new(5, 5, 0), true);
+
+        let changes = snapshots.plan_reset("warehouse", 0).unwrap();
+        assert_eq!(changes.len(), 1);
+        assert!(changes[0].2); // is a floor item
+    }
+
+    #[test]
+    fn plan_reset_debounces() {
+        let mut world = World::new();
+        let entity = world.spawn(TilePosition::new(10, 20, 0)).id();
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", entity, TilePosition::new(10, 20, 0), false);
+
+        // First reset at tick 0
+        assert!(snapshots.plan_reset("test_room", 0).is_some());
+
+        // Second reset at tick 5 — should be debounced
+        assert!(snapshots.plan_reset("test_room", 5).is_none());
+
+        // Third reset at tick 10 — should succeed
+        assert!(snapshots.plan_reset("test_room", 10).is_some());
+    }
+
+    #[test]
+    fn plan_reset_debounce_exact_boundary() {
+        let mut world = World::new();
+        let entity = world.spawn(TilePosition::new(10, 20, 0)).id();
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", entity, TilePosition::new(10, 20, 0), false);
+
+        // Reset at tick 0
+        assert!(snapshots.plan_reset("test_room", 0).is_some());
+
+        // Tick 9: exactly one tick before debounce expires — must be rejected
+        assert!(
+            snapshots.plan_reset("test_room", 9).is_none(),
+            "tick 9 should be rejected (debounce is 10 ticks)"
+        );
+
+        // Tick 10: exact debounce boundary — must be accepted
+        assert!(
+            snapshots.plan_reset("test_room", 10).is_some(),
+            "tick 10 should be accepted (debounce elapsed)"
+        );
+    }
+
+    #[test]
+    fn plan_reset_unknown_room_returns_none() {
+        let mut snapshots = RoomSnapshots::default();
+        assert!(snapshots.plan_reset("nonexistent", 0).is_none());
+    }
+
+    #[test]
+    fn can_reset_fresh_room() {
+        let snapshots = RoomSnapshots::default();
+        assert!(snapshots.can_reset("any_room", 0));
+    }
+
+    #[test]
+    fn can_reset_after_debounce() {
+        let mut snapshots = RoomSnapshots::default();
+        snapshots
+            .last_reset_tick
+            .insert("room".to_string(), 100);
+
+        assert!(!snapshots.can_reset("room", 105));
+        assert!(snapshots.can_reset("room", 110));
+        assert!(snapshots.can_reset("room", 200));
+    }
+}

server/src/test_world/rooms/hub.rs

@@ -0,0 +1,40 @@
+//! Central Hub — Room 0 (24x24)
+//!
+//! Connector room with 4 directional sign markers. No test entities.
+//! Hub spawn point: (12, 12) relative = (50, 58) absolute.
+//!
+//! Entities (StableId 1-4):
+//!   sign_north  (50, 48) — "Fog Theater"
+//!   sign_east   (60, 58) — "Occlusion Corridor"
+//!   sign_south  (50, 68) — "Pause Chamber"
+//!   sign_west   (40, 58) — "Inventory Warehouse"
+
+use bevy_app::prelude::*;
+
+use crate::knowledge::registry::{EntityRegistry, StableEntityId};
+use crate::simulation::interaction::Interactable;
+use crate::simulation::movement::TilePosition;
+
+/// Room origin (top-left corner including walls).
+const ORIGIN_X: i32 = 38;
+const ORIGIN_Y: i32 = 46;
+
+/// Sign positions as relative offsets from room origin.
+const SIGNS: &[(&str, i32, i32)] = &[
+    ("sign_north", 12, 2),  // North marker
+    ("sign_east", 22, 12),  // East marker
+    ("sign_south", 12, 22), // South marker
+    ("sign_west", 2, 12),   // West marker
+];
+
+/// Spawn hub sign entities in canonical order (StableId 1-4).
+pub fn spawn_entities(app: &mut App, registry: &mut EntityRegistry) {
+    for &(_name, rx, ry) in SIGNS {
+        let pos = TilePosition::new(ORIGIN_X + rx, ORIGIN_Y + ry, 0);
+        let entity = app.world_mut().spawn((Interactable, pos)).id();
+        let sid = registry.register(entity);
+        app.world_mut()
+            .entity_mut(entity)
+            .insert(StableEntityId(sid));
+    }
+}

server/src/test_world/rooms/inventory_warehouse.rs

@@ -0,0 +1,88 @@
+//! Inventory Warehouse — Room 3 (30x28)
+//!
+//! Tests D-065 (9-slot inventory), pickup/drop verbs, CarriedBy component.
+//!
+//! Layout: Open warehouse floor with 10 item crates in a grid pattern
+//! and 1 NPC near the back wall for interaction testing while carrying items.
+//!
+//! Observer position: (15, 14) relative = (17, 54) absolute, facing East.
+//!
+//! Entities (StableId 13-23):
+//!   crate_01..crate_10 — Floor items (Container ObjectType)
+//!   npc_warehouse      — Interaction target
+
+use bevy_app::prelude::*;
+
+use crate::bridge::types::ObjectType;
+use crate::knowledge::registry::{EntityRegistry, StableEntityId};
+use crate::npc::{Contentment, Npc, ToleranceThreshold, Want, WantKind};
+use crate::simulation::interaction::Interactable;
+use crate::simulation::inventory::ItemName;
+use crate::simulation::movement::TilePosition;
+use crate::simulation::path_follow::MovementSpeed;
+
+/// Room origin (top-left corner including walls).
+const ORIGIN_X: i32 = 2;
+const ORIGIN_Y: i32 = 40;
+
+/// Item crate definitions: (name, relative_x, relative_y, item_name).
+/// 10 crates for testing the 9-slot inventory limit.
+const CRATES: &[(&str, i32, i32, &str)] = &[
+    ("crate_01", 4, 4, "Keycard"),
+    ("crate_02", 8, 4, "Manifest"),
+    ("crate_03", 12, 4, "Datapad"),
+    ("crate_04", 16, 4, "Toolkit"),
+    ("crate_05", 4, 10, "Badge"),
+    ("crate_06", 8, 10, "Medkit"),
+    ("crate_07", 12, 10, "Ration"),
+    ("crate_08", 16, 10, "Cable"),
+    ("crate_09", 4, 16, "Seal"),
+    ("crate_10", 8, 16, "Chip"),
+];
+
+/// Spawn Inventory Warehouse entities in canonical order (StableId 13-23).
+pub fn spawn_entities(app: &mut App, registry: &mut EntityRegistry) {
+    // Crates (StableId 13-22)
+    for &(_name, rx, ry, item_name) in CRATES {
+        let pos = TilePosition::new(ORIGIN_X + rx, ORIGIN_Y + ry, 0);
+        let entity = app
+            .world_mut()
+            .spawn((
+                Interactable,
+                ObjectType::Container,
+                ItemName(item_name.to_string()),
+                pos,
+            ))
+            .id();
+        let sid = registry.register(entity);
+        app.world_mut()
+            .entity_mut(entity)
+            .insert(StableEntityId(sid));
+    }
+
+    // Warehouse NPC (StableId 23)
+    let npc_pos = TilePosition::new(ORIGIN_X + 22, ORIGIN_Y + 14, 0);
+    let entity = app
+        .world_mut()
+        .spawn((
+            Npc,
+            Interactable,
+            npc_pos,
+            Want {
+                primary: WantKind::Wealth,
+                intensity: 5,
+                description: "Warehouse supervisor wants efficiency".to_string(),
+            },
+            Contentment { level: 10 },
+            ToleranceThreshold {
+                current_stress: 15,
+                threshold: 65,
+            },
+            MovementSpeed::default(),
+        ))
+        .id();
+    let sid = registry.register(entity);
+    app.world_mut()
+        .entity_mut(entity)
+        .insert(StableEntityId(sid));
+}

server/src/test_world/rooms/mod.rs

@@ -0,0 +1,9 @@
+//! Gauntlet room builders.
+//!
+//! Each room module exports a `spawn_entities()` function that creates
+//! entities in canonical order for deterministic StableId assignment.
+
+pub mod hub;
+pub mod inventory_warehouse;
+pub mod occlusion_corridor;
+pub mod pause_chamber;

server/src/test_world/rooms/occlusion_corridor.rs

@@ -0,0 +1,66 @@
+//! Occlusion Corridor — Room 2 (42x22)
+//!
+//! Tests D-035 (symmetric shadowcasting), D-017 (perception modes),
+//! D-015 (vision cone sectors).
+//!
+//! Layout: Long east-west corridor with perpendicular wall segments
+//! creating visibility pockets. North alcove with hidden NPC,
+//! south alcove with partially visible NPC.
+//!
+//! Observer position: (10, 10) relative = (84, 58) absolute, facing East.
+//!
+//! Entities (StableId 9-12):
+//!   npc_guard_visible  (92, 58)  — Clear LOS baseline
+//!   npc_hidden_wall    (92, 52)  — Behind north wall segment
+//!   npc_peripheral     (80, 64)  — South alcove, peripheral sector
+//!   npc_far_end        (110, 58) — Far end of corridor, tests range
+
+use bevy_app::prelude::*;
+
+use crate::knowledge::registry::{EntityRegistry, StableEntityId};
+use crate::npc::{Contentment, Npc, ToleranceThreshold, Want, WantKind};
+use crate::simulation::interaction::Interactable;
+use crate::simulation::movement::TilePosition;
+use crate::simulation::path_follow::MovementSpeed;
+
+/// Room origin (top-left corner including walls).
+const ORIGIN_X: i32 = 74;
+const ORIGIN_Y: i32 = 48;
+
+/// NPC definitions: (name, relative_x, relative_y, want_kind, want_intensity).
+const NPCS: &[(&str, i32, i32, WantKind, u8)] = &[
+    ("npc_guard_visible", 18, 10, WantKind::Safety, 5),
+    ("npc_hidden_wall", 18, 4, WantKind::Freedom, 3),
+    ("npc_peripheral", 6, 16, WantKind::Knowledge, 6),
+    ("npc_far_end", 36, 10, WantKind::Wealth, 4),
+];
+
+/// Spawn Occlusion Corridor entities in canonical order (StableId 9-12).
+pub fn spawn_entities(app: &mut App, registry: &mut EntityRegistry) {
+    for &(name, rx, ry, want_kind, intensity) in NPCS {
+        let pos = TilePosition::new(ORIGIN_X + rx, ORIGIN_Y + ry, 0);
+        let entity = app
+            .world_mut()
+            .spawn((
+                Npc,
+                Interactable,
+                pos,
+                Want {
+                    primary: want_kind,
+                    intensity,
+                    description: format!("Occlusion Corridor test NPC: {}", name),
+                },
+                Contentment { level: 0 },
+                ToleranceThreshold {
+                    current_stress: 0,
+                    threshold: 50,
+                },
+                MovementSpeed::default(),
+            ))
+            .id();
+        let sid = registry.register(entity);
+        app.world_mut()
+            .entity_mut(entity)
+            .insert(StableEntityId(sid));
+    }
+}

server/src/test_world/rooms/pause_chamber.rs

@@ -0,0 +1,51 @@
+//! Pause Chamber — Room 5 (16x16)
+//!
+//! Tests D-031 (pause/unpause), Bug #3 regression (movement while paused).
+//!
+//! Layout: Minimal open room with a single NPC. No visual complexity —
+//! this room is pure state machine testing.
+//!
+//! Observer position: (8, 8) relative = (50, 86) absolute, facing North.
+//!
+//! Entities (StableId 29):
+//!   npc_pause_target — Interaction target during pause (Talk should work)
+
+use bevy_app::prelude::*;
+
+use crate::knowledge::registry::{EntityRegistry, StableEntityId};
+use crate::npc::{Contentment, Npc, ToleranceThreshold, Want, WantKind};
+use crate::simulation::interaction::Interactable;
+use crate::simulation::movement::TilePosition;
+use crate::simulation::path_follow::MovementSpeed;
+
+/// Room origin (top-left corner including walls).
+const ORIGIN_X: i32 = 42;
+const ORIGIN_Y: i32 = 78;
+
+/// Spawn Pause Chamber entities in canonical order (StableId 29).
+pub fn spawn_entities(app: &mut App, registry: &mut EntityRegistry) {
+    let pos = TilePosition::new(ORIGIN_X + 6, ORIGIN_Y + 6, 0);
+    let entity = app
+        .world_mut()
+        .spawn((
+            Npc,
+            Interactable,
+            pos,
+            Want {
+                primary: WantKind::Safety,
+                intensity: 3,
+                description: "Wants a quiet posting".to_string(),
+            },
+            Contentment { level: 5 },
+            ToleranceThreshold {
+                current_stress: 10,
+                threshold: 40,
+            },
+            MovementSpeed::default(),
+        ))
+        .id();
+    let sid = registry.register(entity);
+    app.world_mut()
+        .entity_mut(entity)
+        .insert(StableEntityId(sid));
+}

server/tests/content_loading.rs

@@ -3,6 +3,8 @@
 //! Tests the full pipeline: discover content → deserialize YAML → spawn ECS entities.
 //! Uses real content files from content/ directory for structural content,
 //! and a test fixture for isolated NPC profile spawning.
+//!
+//! Runtime validation (TCP boot + tick) is in content_runtime.rs.
 
 use bevy_app::prelude::*;
 use bevy_ecs::prelude::*;
@@ -416,3 +418,6 @@ fn spawn_real_content_with_relationships_and_secrets() {
         .expect("Nils should have Want");
     assert_eq!(nils_want.primary, npc::WantKind::Power);
 }
+
+// Runtime validation test (boot + tick 10 + snapshot) moved to
+// server/tests/content_runtime.rs per architectural review.

server/tests/content_runtime.rs

@@ -0,0 +1,150 @@
+//! Runtime validation: boot full plugin stack with real content, tick 10
+//! times over TCP, assert valid ObserverSnapshot (#489).
+//!
+//! Separated from content_loading.rs (structural loading tests) per
+//! architectural review — TCP runtime tests have different failure modes
+//! and timeout characteristics.
+
+use bevy_app::prelude::*;
+use std::net::{TcpListener, TcpStream};
+use std::path::PathBuf;
+use std::thread;
+use std::time::Duration;
+
+use settled_reach_server::bridge::framing::{read_framed, write_framed};
+use settled_reach_server::bridge::tcp::TcpBridge;
+use settled_reach_server::bridge::types::*;
+use settled_reach_server::bridge::{BridgePlugin, BridgeResource};
+use settled_reach_server::content::{ContentConfig, ContentPlugin};
+use settled_reach_server::knowledge::registry::EntityRegistry;
+use settled_reach_server::knowledge::KnowledgeGraph;
+use settled_reach_server::perception::cognitive_delay::CognitiveDelay;
+use settled_reach_server::perception::vision_cone::Facing;
+use settled_reach_server::simulation::interaction::NearbyInteractionBuffer;
+use settled_reach_server::simulation::listening::ListeningFocus;
+use settled_reach_server::simulation::monologue::{
+    MonologueBuffer, MonologueState, SprintAnomalyQueue,
+};
+use settled_reach_server::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
+use settled_reach_server::simulation::stance::{MovementProfile, PlayerMoveCooldown};
+use settled_reach_server::simulation::SimulationPlugin;
+
+fn content_root() -> PathBuf {
+    let manifest_dir = env!("CARGO_MANIFEST_DIR");
+    PathBuf::from(manifest_dir).join("../content")
+}
+
+/// Smoke test for production content. Boots the full plugin stack with real
+/// content over TCP, ticks 10 times, and asserts a valid ObserverSnapshot.
+/// Catches runtime panics from broken entity references, missing components,
+/// or content schema issues that pass YAML validation but fail at tick time.
+#[test]
+fn content_runtime_boot_tick_10_snapshot() {
+    use std::io::{BufReader, BufWriter};
+
+    let root = content_root();
+    if !root.join("content.yaml").exists() {
+        eprintln!("Skipping: content directory not found at {:?}", root);
+        return;
+    }
+
+    let listener = TcpListener::bind("127.0.0.1:0").expect("bind listener");
+    let server_addr = listener.local_addr().expect("get local addr");
+
+    // Server thread: full plugin stack with real content
+    let server_handle = thread::spawn(move || {
+        let bridge = TcpBridge::accept_on(listener).expect("accept connection");
+
+        let mut app = App::new();
+        app.add_plugins(SimulationPlugin);
+        app.add_plugins(BridgePlugin);
+        app.add_plugins(settled_reach_server::knowledge::KnowledgePlugin);
+        app.add_plugins(settled_reach_server::npc::NpcPlugin);
+        app.insert_resource(ContentConfig {
+            content_root: root,
+            ..Default::default()
+        });
+        app.add_plugins(ContentPlugin);
+        app.insert_resource(BridgeResource::new(bridge));
+        app.insert_resource(WalkabilityMap::new(32, 32, 1));
+
+        // Spawn player with all required observer pipeline components
+        let profile = MovementProfile::smuggler();
+        let mut registry = EntityRegistry::new(0);
+        let player = app
+            .world_mut()
+            .spawn((
+                PlayerCharacter,
+                TilePosition::new(16, 16, 0),
+                Facing::default(),
+                KnowledgeGraph::new(),
+                NearbyInteractionBuffer::default(),
+                MonologueState::default(),
+                MonologueBuffer::default(),
+                SprintAnomalyQueue::default(),
+                CognitiveDelay::default(),
+                ListeningFocus::new(TilePosition::new(16, 16, 0)),
+                profile,
+                profile.initial_stance(),
+                PlayerMoveCooldown::default(),
+            ))
+            .id();
+        registry.register(player);
+        app.insert_resource(registry);
+
+        // Tick 10 times — any panic here means content has a runtime bug
+        for _ in 0..10 {
+            app.update();
+        }
+    });
+
+    // Client: connect with read timeout and receive 10 snapshots
+    let stream = TcpStream::connect(server_addr).expect("client connect");
+    stream
+        .set_read_timeout(Some(Duration::from_secs(10)))
+        .expect("set read timeout");
+    let mut reader = BufReader::new(stream.try_clone().expect("clone for reader"));
+    let mut writer = BufWriter::new(stream);
+
+    let mut last_snapshot = None;
+    for tick in 0..10 {
+        let payload = read_framed(&mut reader)
+            .unwrap_or_else(|e| panic!("read error at tick {}: {}", tick, e))
+            .unwrap_or_else(|| panic!("unexpected EOF at tick {}", tick));
+
+        let snapshot: ObserverSnapshot = rmp_serde::from_slice(&payload)
+            .unwrap_or_else(|e| panic!("deserialization error at tick {}: {}", tick, e));
+
+        last_snapshot = Some(snapshot);
+
+        // Send empty input for next tick
+        let empty: Vec<PlayerInput> = vec![];
+        let input_payload = rmp_serde::to_vec(&empty).expect("serialize empty input");
+        if write_framed(&mut writer, &input_payload).is_err() {
+            // Server may have shut down after tick 10 — that's fine
+            break;
+        }
+    }
+
+    drop(reader);
+    drop(writer);
+
+    // Server thread must not have panicked
+    server_handle
+        .join()
+        .expect("server thread panicked — content triggered a runtime error during tick processing");
+
+    // Validate final snapshot
+    let snapshot = last_snapshot.expect("should have received at least one snapshot");
+    assert_eq!(
+        snapshot.version, PROTOCOL_VERSION,
+        "snapshot protocol version mismatch"
+    );
+    // Content-spawned NPCs should be visible (they all spawn at 0,0,0 by default)
+    // The player is at 16,16 — content NPCs are far away but the player entity itself
+    // should always be in the snapshot
+    assert!(
+        !snapshot.entities.is_empty(),
+        "snapshot should contain at least the player entity"
+    );
+}

server/tests/fixtures/gdscript/boundary_tick_127.msgpack

@@ -0,0 +1 @@
+うtickｦaction･Pause

server/tests/fixtures/gdscript/boundary_tick_128.msgpack

@@ -0,0 +1 @@
+うtickﾌ€ｦaction･Pause

server/tests/fixtures/gdscript/boundary_tick_2147483647.msgpack

@@ -0,0 +1 @@
+‚¤tickÒÿÿÿ¦action¥Pause

server/tests/fixtures/gdscript/boundary_tick_255.msgpack

@@ -0,0 +1 @@
+うtickﾌ�ｦaction･Pause

server/tests/fixtures/gdscript/boundary_tick_32767.msgpack

@@ -0,0 +1 @@
+うtickﾑ�ｦaction･Pause

server/tests/fixtures/gdscript/boundary_tick_65535.msgpack

@@ -0,0 +1 @@
+‚¤tickÍÿÿ¦action¥Pause