AtlasLayerRequest gains window_center/window_n (serde-default, absent
= whole-body, wire back-compat; demux untouched — up_to stays the
discriminator). DistrictWindowLayer echoes center/n + six parallel
arrays (morphology, elev_q, temp_dc i16 with the region sentinel,
moisture_q, vegetation incl Marine=6, glaciation).
Serving per the amendment's binding model: NEVER inline —
GenWorkItem::DeriveWindow rides the Rayon queue, completion drain
caches into DistrictWindowCache (bounded FIFO 256; no staleness by
D-227 purity, capacity bound only), serve_district_window polls the
cache and returns Pending-shaped None until derived. Per-connection
coalescing: submit_window supersedes a still-pending item for the
same (ConnectionId, body) — the surviving item is the newer one,
proven by dedicated tests.
TerrainAnalysis decision (option b, numbers in ticket/PR): re-derive
via run_layer1 in the DeriveWindow branch rather than caching ~1.5MB
x 50 LRU slots (~100MB permanent, the exact D-203 bloat T-1044's own
text guarded against); ~45ms one-time on the Rayon path, invisible to
the tick thread. T-1044 confirmed within-cascade-only (cascade.rs:358
still drops the analysis before BodyWorldState) — the fork was open.
Window derive loop promoted from aliveness_probe::render_window_panels;
determinism promoted from probe-only proof to a real test (two passes
byte-identical). New fixture atlas_response_ready_with_window
exercises all six arrays incl. the airless sentinel and Marine; three
existing fixtures gain district_window: None. Server clamps window_n
to 1..=DISTRICT_WINDOW_MAX_N=64 (never trust the wire).
1774/1774 lib + 19/19 bridge_tcp green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hoshe's finding: the H1 union-rejection mechanism correctly counts the
new browse discriminator, but ambiguous_union_frame_is_rejected was
carried over from PR #176 without a browse-inclusive case — a future
demux/ShapeProbe refactor could drop the fifth shape from the union
check with nothing to catch it. Adds browse+star_map and
browse+city_names union frames, both asserting rejection.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
browse_reader.rs: BrowseReader on the CityContextReader::open() pattern
— six index + six detail reads against systems.db (bodies filterable by
containing system; system/corporation/commodity details fold their join
partners). browse_proxy.rs: BrowseRequest{browse, kind, query} /
BrowseResponse{kind, status, index, detail} wire types + dispatcher;
BrowseIndexRow{id, primary, secondary} generic across kinds;
BrowseDetail a per-kind enum of field-exhaustive structs.
Demux: Inbound::BrowseRequest is the FIFTH map shape — deliberately the
last; the doc's four-shape ceiling is re-pinned at five with rationale
(six kinds x two forms folded into ONE envelope whose internal enums
pick sub-behavior, the AtlasLayerRequest.up_to precedent, instead of
twelve top-level shapes) and a hard rule that a sixth shape must
migrate to the D-225 tagged-envelope framing. Served for BOTH roles,
connection-tagged 1:1 in-order like atlas/starmap/citynames.
serve_browse_requests pub so integration tests drive the true
end-to-end pipeline. Wire-only per D-254 (T-949 precedent); v1
exclusions (cascade geometry, event logs) respected.
30 unit tests + 7 bridge_tcp integration tests (six-kind round-trip
over real TCP, reader-can-browse, no crossed responses between two
readers, unknown-id NotFound, empty-table Ready); 2 pre-existing tests
updated for the new receive_bridge_inputs parameter.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ConnectionRole (Player|Reader, serde-default Player for wire back-compat;
shaped for a future TradingReader) on StartupMessage. BridgeResource
rewritten as 0-1 Player + 0-N Readers with ConnectionId; per-tick
accept_new_connections loop replaces the single blocking accept (the
listener is cloned non-blocking into ConnectionListener). First
connection installs per startup.role — spawn-mode Readers are often the
only connection a server gets.
Permitted-message matrix: readers may handshake and issue
Atlas/StarMap/CityNames requests (responses connection-tagged, own
requests only); PlayerInput from a reader is dropped with a strike
(disconnect at 3); ObserverSnapshot has no reader-facing path at all.
Shutdown scope: only a PLAYER send failure flips ServerRunning —
reader-only servers idle with the snapshot queued; reader disconnects
never kill the session.
Deliberately out of scope, documented at the call site: character spawn
stays in monolithic world-setup (reader-first servers carry an inert
unpiloted PlayerCharacter); no total-reader-count cap (per-reader frame
cap only, loopback-only scope).
6 new bridge_tcp integration tests; layer3 subprocess test exercises the
accept-loop end to end.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
H1 demux: ShapeProbe defensive multi-shape rejection (union frames now Err, not first-match; +2 tests) and doc claim made honest. H2/T1 SystemIndex.reset_test_state() folded into SimBridge.reset_test_state() (load() inline per autoload rule) + has_pending_request() accessor. H3 no-op tests now assert the replay flag both directions. H4 retry test actually ingests a failure and asserts the retry semantic. H5 error fixture uses the normalized status string. H6 bridge_tcp e2e sends all five frame shapes over real TCP (star-map + city-names buffers asserted). H7 positive replay-on-CONNECTED test via the test_local_bridge test-mode-flip precedent (stub bridge captures + decodes the request bytes). H8/T2 stale PLACEHOLDER doc replaced with the confirmed contract. H9 is_capital doc matches the COALESCE reality. T-r1 demux ceiling written down (next shape = tagged envelope). T-r2 AtlasLayerResponse governance ceiling comment. Lead item: the four cargo-fmt-formatted files from the gate round are now committed (layer_proxy/plugin/bridge-mod/main). H10 note for the record: the 13 snapshot_*.msgpack fixtures in commit 845737617 were regenerated because they were stale against their own generator (pre-existing version-key removal) — verified harmless, no client reads that key.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
T-960: RoadGraphLayer (L2 edges/junctions, MaintenanceAuthority, rail flag, named routes) + SettlementLayer (name/position/size-class/is_capital/is_port from T-955 placements) as new Option fields on AtlasLayerResponse — T-1046 precedent; layer_proxy doc comment corrected (cascade runs through RoadGraph, client up_to ignored). T-949: new StarMapRequest/StarMapResponse (raw JSON passthrough of the star_map_data.json bake) + CityNamesRequest/CityNamesResponse (atlas_city_names via CityContextReader) with defense-in-depth Sol exclusion (GJ-0 system id OR settlement_wave='origin', D-236). Inbound demux extended with mandatory boolean discriminator fields (serde ignores unknown fields — optional-shape sniffing would be ambiguous); AtlasLayerRequest unchanged. SimBridge trait +2 methods, implemented on TcpBridge + LocalBridge. CityPlacement/CityRecord gained name/population/is_capital (BodyWorldState cache-hit path stays DB-free). ~30 new unit tests incl. demux disambiguation + Sol branches; gen_fixtures extended for road/settlement samples.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
FrameAccumulator state machine in framing.rs holds partial prefix/payload
bytes across non-blocking receive() calls — a frame split across TCP
segments no longer desyncs the stream (read_exact previously discarded
partially-consumed bytes on WouldBlock). receive_bridge_inputs now drains
all ready frames per tick (capped) instead of exactly one, covering input
batches + atlas requests in the same window.
Review hardening: EOF mid-frame escalates to Disconnected like clean EOF
(peer died with a truncated stream) instead of logging an Io error every
tick. Tests: frame split inside prefix / inside payload, multi-frame
drain, mid-frame-EOF disconnect. Corrupt-stream escalation tracked as
T-1072.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Closes the server-side layer-stream loop. serve_atlas_requests (PreInput) drains
the AtlasRequestBuffer and runs each through handle_atlas_request (cache hit ->
Ready; miss -> resolve via BodySourceResolver + enqueue an Immediate AnalyzeBody
-> Pending), buffering AtlasLayerResponses. send_atlas_responses (PostSnapshot)
flushes them to the client. main.rs wires BodySourceResolverResource (base root
= systems.db's 3rd ancestor; mod roots layer on later). Misses flow through the
#968 background tier and a re-request hits the now-warm cache.
Full path now live server-side: client request -> receive() demux -> serve ->
proxy -> (cache | queue+cascade) -> response -> client. The client half (send
request, decode response, render overlays) is #960.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replaces the fixed-type SimBridge::receive_inputs() with a tagged
receive() -> Option<Inbound>, where Inbound is Inputs(Vec<PlayerInput>) or
AtlasRequest(AtlasLayerRequest). A shared decode_inbound() demuxes a frame by
shape (msgpack array = inputs, map = atlas request) — additive, no wire change
to existing input/snapshot frames. Adds send_atlas_response() to the trait
(both TcpBridge + LocalBridge impls). receive_bridge_inputs routes inputs to
the InputQueue as before; atlas requests to a new AtlasRequestBuffer (drained
by the serve system next). Integration tests (bridge_tcp/bridge_ipc) updated to
the tagged receive(); a demux unit test covers all three branches.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Per R-012: delete conversation.rs, both overheard content files, and
remove all 6 wire-up points (social_plugin, bridge/types, monologue,
voice/integration). Protocol version 22 → 23. Scope confirmed by
#842 audit — npc/ and content/global/ untouched. Surviving NPC
components (NpcName, NpcColorIndex, NpcConversation) migrated to
simulation/npc_components.rs for use by D-080 knowledge propagation.
Also applies pre-existing cargo fmt debt (names.rs and 4 others).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
10-phase linear pipeline: PreInput → Input → Movement → Simulation →
Economy → Storyteller → Snapshot → PostSnapshot → Knowledge → TickAdvance.
Each system assigned to exactly one phase via .in_set(TickPhase::X).
Cross-phase .after()/.before() eliminated — only intra-phase ordering
remains. Prevents schedule cycles by construction.
SimulationPlugin refactored into sub-plugins by domain:
- InputPlugin (player actions, interactions, dialogue dispatch)
- MovementPlugin (pathfinding, movement validation, spatial indexing)
- SocialPlugin (conversations, sound, voice enrichment, follow state)
- EconomyPlugin (tâtonnement tick, IPC query serving)
- TimePlugin (chunk streaming, news ticker, tick advancement)
All other plugins (NPC, Knowledge, Perception, Storyteller, Settings,
Bridge) updated to use TickPhase assignments instead of cross-plugin
ordering constraints. BridgePlugin trimmed to bridge I/O concerns only.
Part A of #843. Parts B (multi-threaded executor) and C (background
workers) follow.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
tick_economy_simulation was ordered .after(advance_tick) which created a
cycle: observer_snapshot → send_snapshot → advance_tick → tick_economy →
observer_snapshot. Moved to .after(process_player_input) instead — the
economy checks time.tick which works regardless of advance order.
Also removed the .after(tick_economy_simulation) from handle_debug_commands
that was added during Sprint 34 review — same cycle root cause.
This is a symptom of #843 (ad-hoc ordering is fragile). Pair session
scheduled to replace with system set phases.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Widen EventPort tick methods from u32 to u64 (prevents overflow)
- Add is_identity() guard on hot-path String allocation in modifiers
- Replace Vec::remove(0) with VecDeque::pop_front() in price history
- Add .after(tick_economy_simulation) ordering for debug commands
- Fix stale PROTOCOL_VERSION assertion (20 → 21) in serialization test
- Add D-181 Phase 2 visibility scope comment on serve_econ_state_query
- Eliminate double lookup in rebuild_signals via single-pass extraction
- Track economy seed TODO with backlog ticket reference
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Fix all Clippy warnings across the server codebase (2411 insertions, 1341
deletions). Raise type-complexity-threshold to 750 and too-many-arguments
to 12 in .clippy.toml for idiomatic Bevy ECS system signatures. The server
now passes `cargo clippy -- --deny warnings` cleanly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Debug and LOS tracks for Sprint 23 (#580, #584):
- DebugCommandKind enum with 10 variants (AdvanceTicks,
SkipToContamination, TeleportToPosition, ForceContaminationActivate,
InspectNpc, ListTriangles, ListPopulation, GetContaminationStatus,
TeleportToLocation, ForceTriangleActivation)
- DebugResponsePayload on ObserverSnapshot, handle_debug_commands
system gated by DebugEnabled resource
- PROTOCOL_VERSION bumped 17 → 18
- VisibilitySector::BoundaryWall variant — 1-tile wall margin beyond
LOS boundary included in visible_tiles (not exploration/memory)
- compute_boundary_walls() pass in NaturalVision after FOV+cone
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements the StartupMessage protocol: client generates world_seed in
SessionManager.new_game(), sends it after handshake, server uses it to
seed SimRng and sample EntanglementConfig.
EntanglementConfig samples flat ∈ [25,35]%, intrigue ∈ [15,25]%, mundane
as remainder (D-029). Same seed produces identical config (D-010
determinism). Different seeds produce distinct configs in ≥90% of pairs.
Protocol flow: HandshakeMessage (server→client) → StartupMessage with
world_seed (client→server) → SimRng initialization → tick loop.
10 Rust tests (determinism, variation, bounds, sum invariant).
9 GDScript test stubs + 2 encode tests for client-side pipeline.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Protocol v17: add state_hash (desync detection) and sim_errors
(structured error reporting) to ObserverSnapshot. Add SimError,
SimErrorKind, SimErrorBuffer types. Wrap main loop app.update() in
catch_unwind — on panic, send a final SimError snapshot before exit.
Report recoverable deserialization errors to client via SimErrorBuffer.
Compute per-tick state hash from player position + NPC count + tick.
Update all test fixtures and golden files for protocol v17.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Protocol handshake (#555): HandshakeMessage as first IPC frame,
HandshakeState resource, forward-compatible input handling.
State serialization (#96): serialize_npc_to_frozen/deserialize with
full D-024 axis coverage (10 new optional fields on NpcSaveState).
Scope tags (#98): ScopeTagKind enum, ScopePinned marker, automatic
assignment from KnowledgeGraph and RelationshipGraph.
Timestamp eviction (#97): LastInteractionTick, SimSpacePressure,
BinaryHeap LRU eviction respecting ScopePinned entities.
Save/load (#553): save_to_file/load_from_file via MessagePack,
SaveGame/LoadGame IPC commands, SaveLoadResultWire on snapshot.
Test infrastructure (#200): Layer 3 integration test entry point,
three-layer architecture documented per D-030.
Information boundary tests (#272): 4 negative tests proving no
passive KG leakage, LOS fog holds, tier boundary holds, save
isolation per NPC.
1063 tests passing, 0 failures.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
tell_state reads KG for other-entity relationship state (MVP boundary
per D-082). Contradiction monologue fires with pre-resolved entity names,
shifts ToldBy source to PersonOfInterest. Full THE FRIEND arc event chain.
Implements D-082 step 1, D-083 event chain.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move dialogue system registrations from BridgePlugin to NpcPlugin (#538):
game logic that depends on NPC-layer resources now registers where it
belongs. BridgePlugin retains only wire protocol concerns.
Implement DialogueResponse verb handler (#539): new process_dialogue_response
system runs the full D-028 four-layer pipeline to select follow-up lines
when the player picks a dialogue option. Clears ActiveDialogue when no
candidates remain. Fix latent schedule ambiguity — emit_observation_events
now has explicit .before(advance_tick) constraint.
Verify trust-gated gossip pipeline (#171): confirmed process_talk_interaction
correctly passes KnowledgeConfidence through relationship_to_trust() per
D-075. Added integration tests for Secret-tier access (Friendly+KnowsDetails)
and Surface-only fallback (Friendly+Suspects).
Wire DialogueCooldownTracker into selection (#338): added regression test
confirming no line_id repeats within the 600-tick cooldown window across
10 consecutive Talk interactions.
Closes#538, #539, #171, #338
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Register all new systems in NpcPlugin and SimulationPlugin with correct
ordering constraints. Protocol bumped to v13: tell_state on VisibleEntity,
follow_state and PostConversationQueue on ObserverSnapshot, Follow verb
on VerbKind. Observer snapshot populates tell state from DerivedTellState
and follow state from FollowTarget. System ordering: tolerance after
mood, deviation after activity, tell after mood+deviation, follow after
visibility geometry, event monologue after conversations.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
format_snapshot_text(&ObserverSnapshot) -> String pub-exported from
server crate. Entity labels as kind:entity_id sorted by distance,
room name stubbed as (unknown) until Gauntlet constants land.
10 unit tests. Consumed by tooling/test-client for --text mode.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implement full dialogue selection pipeline (D-028): 4-layer filtering
engine with access tier, situation derivation, trust tier, and weighted
topic+mood scoring via SimRng. Add ContentSlug component for stable
content identity across save/load. Add walk-away KG recording with
IncompleteInteraction events per D-064 three-phase consequences. Bump
protocol to v8 with DialogueResponseEvent. Fixes#305, #427, #452.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
read_framed() called read_exact() which blocked the entire bevy Update
schedule waiting for client input — no systems ran until a keystroke
arrived. Switch TcpStream to non-blocking mode so receive_inputs()
returns Ok(vec![]) on WouldBlock instead of blocking. Toggle to
blocking for snapshot writes (reliable delivery). Add 50ms frame
throttle (~20 ticks/sec) since the non-blocking loop would otherwise
spin. Downgrade input receive logging to trace, add error logging for
missing bridge resource and failed observer queries.
Fixes bug #1 (server never sends snapshots) and #2 (camera doesn't
center until first keystroke).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
When sprinting past a Contradicted entity, queue a delayed retroactive
monologue that fires after ~1.5s: "Wait — something wasn't right back
there." SprintAnomalyQueue component with first-in-wins semantics.
Detection in observer pipeline, processing in monologue system.
Wire MovementProfile, Stance, and SprintAnomalyQueue into player spawn.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Three fixes to make the gameplay loop functional end-to-end:
- Add Interactable component to NPC spawn so E-prompt detection works
- Build monologue trigger system (enter_location + time_idle) with
MonologueBuffer/MonologueState components, wire through ObserverSnapshot
as current_monologue field, decode on client and display via HUD
- Change PlayerAction::Interact from unit to struct variant carrying
optional target_entity_id and verb fields
Bumps protocol version from 4 to 5. Regenerates MessagePack fixtures.
All 200 tests pass (170 unit + 30 integration).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Log each received player input at DEBUG level with tick and action,
useful for diagnosing input pipeline issues during live testing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Extract visibility geometry into a separate system behind a
PerceptionQuery trait, enabling D-017 perception mode swapping.
Two-stage pipeline: compute_visibility_geometry writes to
VisibilityGeometry resource, compute_observer_snapshot reads it.
Remove KnowledgeGraph from compute_nearby_interactions (simulation
phase boundary violation). Verb availability stays in simulation;
POI-based priority adjustment moves to observer via
apply_poi_verb_priority helper.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Delete generate_snapshot from bridge/mod.rs — superseded by
perception::observer::compute_observer_snapshot. Not referenced
in any schedule or test.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implement compute_nearby_interactions system that detects entities
within close (≤2) and mid (≤5) Manhattan distance, computes
available verbs per D-060 spec. NPCs get Talk+Observe at close
range, Observe-only at mid range; PersonOfInterest flips priority.
Objects get Examine. Results populate nearby_interactions[] on
ObserverSnapshot v4. Bump protocol version 3→4. Implements #404.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements ticket #341 for Sprint 3:
- Add DeserializationWithDump and MutexPoisoned variants to BridgeError
- Replace .expect("mutex poisoned") with graceful error propagation
in LocalBridge and TcpBridge (4 locations)
- Log first 256 bytes as hex dump on deserialization failure for
debugging malformed payloads
- Classify errors in receive_bridge_inputs: BrokenPipe/ConnectionReset
→ clean shutdown, MutexPoisoned → shutdown, DeserializationWithDump
→ skip frame (recoverable)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Filter remembered entities by z-level (Hoshe + Tyre warning)
- Skip remembered ghosts on currently visible tiles (Hoshe warning)
- Bump ObserverSnapshot version to 3 (Tyre suggestion)
- Add edge case tests: visible tile collision, different z-level,
knowledge without position (Hoshe suggestion)
- Regenerate msgpack fixtures for v3
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
VisibleEntity now carries relationship state (D-033 entity color) and
observation type (Visible vs Remembered). compute_observer_snapshot
queries the player's KnowledgeGraph to overlay relationship data on
visible entities and include remembered (not-in-LOS) entities as fog
ghosts at their last known position. Regenerated msgpack fixtures.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Perception system emits DirectObservation/LeftLOS knowledge events
based on snapshot visibility. Entities entering LOS get Direct
confidence; leaving LOS downgrades to KnowsDetails. System params
are optional for backward compatibility when KnowledgePlugin is not
registered. 28 knowledge graph unit tests included.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace unfiltered generate_snapshot with compute_observer_snapshot
that combines shadowcasting + vision cone to send only visible
entities and tiles. Enforces information asymmetry (D-011): NPCs
behind walls or in the blind spot are excluded from the snapshot.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace string-matching disconnect detection with explicit
BridgeError::Disconnected variant. Add TcpBridge::accept_on(listener)
that takes a pre-bound TcpListener, eliminating the 100ms sleep hack
in TCP tests. Send errors now also trigger ServerRunning=false.
Add trace logging to generate_snapshot for entity count visibility.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements the full server-side tick pipeline:
- process_player_input drains InputQueue, converts PlayerActions to
MoveIntent components or pause/unpause toggles
- generate_snapshot builds ObserverSnapshot from ECS state with
render coordinate conversion
- receive_bridge_inputs/send_bridge_snapshot handle bridge I/O with
graceful disconnect detection via ServerRunning resource
- main.rs now accepts TCP connections and runs a proper game loop
- PlayerCharacter marker, Player EntityKind, SnapshotBuffer resource
Closes server side of #81, #82, #83.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Length-prefixed MessagePack framing (4-byte BE length + payload),
LocalBridge struct implementing SimBridge trait over Unix domain
sockets, BridgeResource wrapper for ECS integration. Adds Io
error variant to BridgeError. Two integration tests verify
snapshot and input round-trips over real sockets.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
