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+# Test Plan: Sprint 33 — Pecunia (Economics Simulation)
+
+- **Sprint:** 33
+- **Date:** 2026-04-07
+- **Author:** Hoshe (QA)
+- **Branch:** `sprint-33/server`
+- **Tickets:** #813, #805, #806, #807, #808, #809
+- **Key spec:** `decisions/economics.md` (D-171–D-187), D-179 (stability acceptance criteria)
+
+---
+
+## How to Use This Document
+
+Verification queries are written for `tooling/db/sqlite-query`. Stability tests run via
+`tooling/econ-sim --stability-check` once #807 lands. All SQL queries assume a fully-imported
+`server/data/systems.db` (after running `make economy-db`).
+
+**Pass/fail convention:** Each test has an **Expected** clause. A test fails if the output
+deviates from Expected in any measurable way. Failures from #807 and later that involve
+oscillation or divergence indicate a broken model — tune α/β before calling it a feature (D-179).
+
+---
+
+## Pre-Flight: Baseline Data Sanity
+
+Run these before testing any ticket. If they fail, the DB state is corrupted and ticket-level
+tests are meaningless.
+
+```sql
+-- BF-1: Commodity count must be 36 (D-184)
+SELECT COUNT(*) FROM commodities;
+-- Expected: 36
+
+-- BF-2: Commodity tier breakdown must match D-184 (9/10/9/5/3)
+SELECT tier, COUNT(*) FROM commodities GROUP BY tier ORDER BY tier;
+-- Expected:
+--   intermediate          10
+--   raw                    9
+--   final                  9
+--   service_professional   5
+--   service_luxury         3
+
+-- BF-3: Production chain count must be 21 (D-184)
+SELECT COUNT(*) FROM production_chains;
+-- Expected: 21
+
+-- BF-4: Chain input count must be 40 (count inputs from production_chains.toml)
+SELECT COUNT(*) FROM chain_inputs;
+-- Expected: 40
+
+-- BF-5: Gate links must be bidirectional (every from→to has a matching to→from)
+SELECT COUNT(*) FROM gate_links gl
+WHERE NOT EXISTS (
+    SELECT 1 FROM gate_links rev
+    WHERE rev.from_system_id = gl.to_system_id
+      AND rev.to_system_id = gl.from_system_id
+);
+-- Expected: 0
+
+-- BF-6: All chain inputs reference valid commodities
+SELECT COUNT(*) FROM chain_inputs ci
+LEFT JOIN commodities c ON ci.input_commodity_id = c.commodity_id
+WHERE c.commodity_id IS NULL;
+-- Expected: 0
+
+-- BF-7: All chain outputs reference valid commodities
+SELECT COUNT(*) FROM production_chains pc
+LEFT JOIN commodities c ON pc.output_commodity_id = c.commodity_id
+WHERE c.commodity_id IS NULL;
+-- Expected: 0
+```
+
+**Known discrepancy to verify:** The `commodities.toml` section header reads
+`# PROFESSIONAL SERVICES (7)` but only 5 entries follow. The total must be 36 (matching
+D-184: 9+10+9+5+3). Flag if the count is 38.
+
+---
+
+## #813 — Energy-over-gate Schema Extension
+
+**Spec ref:** D-186
+**Assigned to:** Tyre
+**Status:** in_progress
+
+### What was changed
+
+- `gate_energy_connected INTEGER DEFAULT 1` column added to `star_systems`
+  (system-level, not per body/station — all nodes in a system inherit the system's setting
+  via a join. Gate Corp energy is a system-wide commercial contract, not a per-node toggle.)
+- `MARK_PRIMARY` zones default to `false` (0)
+- All other zones default to `true` (1)
+- Migration is idempotent (safe to re-run via COLUMN_MIGRATIONS)
+- `set_gate_energy()` runs as step 6, after `set_currency_zones()` step 5 (correct ordering)
+
+### Verification queries
+
+```sql
+-- 813-1: Column exists on star_systems table
+PRAGMA table_info(star_systems);
+-- Expected: row with name='gate_energy_connected' and type='INTEGER'
+
+-- 813-2: MARK_PRIMARY systems have gate_energy_connected = 0
+SELECT COUNT(*) FROM star_systems
+WHERE currency_zone = 'MARK_PRIMARY'
+  AND gate_energy_connected != 0;
+-- Expected: 0
+
+-- 813-3: TRACTUS_PRIMARY systems have gate_energy_connected = 1
+SELECT COUNT(*) FROM star_systems
+WHERE currency_zone = 'TRACTUS_PRIMARY'
+  AND gate_energy_connected != 1;
+-- Expected: 0
+
+-- 813-4: MIXED systems have gate_energy_connected = 1
+SELECT COUNT(*) FROM star_systems
+WHERE currency_zone = 'MIXED'
+  AND gate_energy_connected != 1;
+-- Expected: 0
+
+-- 813-5: gate_energy_connected is never NULL
+SELECT COUNT(*) FROM star_systems WHERE gate_energy_connected IS NULL;
+-- Expected: 0
+
+-- 813-6: At least one MARK_PRIMARY system exists (validates zone data is present)
+SELECT COUNT(*) FROM star_systems WHERE currency_zone = 'MARK_PRIMARY';
+-- Expected: > 0  (requires #820 copy work to be merged first; skip if copy branch not merged)
+
+-- 813-7: Sim binary can read gate_energy via join (integration spot-check)
+-- The sim must join bodies/stations to star_systems to get gate_energy_connected.
+-- Verify the join is correct:
+SELECT b.body_id, ss.gate_energy_connected
+FROM bodies b
+JOIN star_systems ss ON b.system_id = ss.system_id
+WHERE b.inhabited = 1
+LIMIT 5;
+-- Expected: 5 rows with gate_energy_connected = 0 or 1 (not NULL)
+```
+
+### Edge cases
+
+**813-E1: Idempotent migration**
+Run `make economy-db` twice on the same DB. Second run must not raise an error, and query
+813-1 through 813-7 must still pass.
+
+**813-E2: Systems with NULL currency_zone**
+If any star system has `currency_zone IS NULL`, the migration logic must treat it as
+`TRACTUS_PRIMARY` (default to `true`). Verify no bodies end up with `gate_energy_connected = 0`
+due to a NULL zone.
+
+```sql
+SELECT COUNT(*) FROM star_systems WHERE currency_zone IS NULL;
+-- Expected: 0 (import pipeline sets default; but verify regardless)
+```
+
+**813-E3: Demand reduction is NOT implemented here**
+Confirm the `~0.3× fusion_fuel` utility demand reduction is absent from the schema-only ticket.
+The demand model lives in the sim binary (#806). Verify:
+- No column named `utility_demand_modifier` or similar on star_systems
+- No new columns beyond `gate_energy_connected` on star_systems
+
+### Regression markers
+
+- `tooling/economy-db/import_economics.py` migration block must still be idempotent
+- Existing BF-1 through BF-7 must still pass after #813 migration
+
+---
+
+## #805 — Corporation Pipeline and Validation
+
+**Spec ref:** D-175, D-182
+**Assigned to:** Dudley
+**Status:** in_progress
+
+### What was changed
+
+- `import_economics.py` (or a new companion script) reads `wiki/corporations/` markdown files
+- Populates `corp_presence` table from authored location data
+- Validates wiki corp names ↔ DB `corporations.proper_name` sync (D-182 sync constraint)
+- Coverage rules: 3+ corps per major commodity type, 1+ per inhabited system >100K pop
+- Chain completeness validation: every intermediate commodity has ≥1 producing chain
+- Coverage failures exit non-zero (D-175 phase gate)
+
+### Verification queries
+
+```sql
+-- 805-1: corp_presence is no longer empty after pipeline run
+SELECT COUNT(*) FROM corp_presence;
+-- Expected: > 0
+
+-- 805-2: All corp_presence rows reference valid corp_id
+SELECT COUNT(*) FROM corp_presence cp
+LEFT JOIN corporations c ON cp.corp_id = c.corp_id
+WHERE c.corp_id IS NULL;
+-- Expected: 0
+
+-- 805-3: All corp_presence rows reference valid location_id
+-- (either a body_id or station_id — location_type determines which table)
+SELECT COUNT(*) FROM corp_presence WHERE location_type = 'body'
+  AND location_id NOT IN (SELECT body_id FROM bodies);
+-- Expected: 0
+SELECT COUNT(*) FROM corp_presence WHERE location_type = 'station'
+  AND location_id NOT IN (SELECT station_id FROM stations);
+-- Expected: 0
+
+-- 805-4: Chain completeness — every intermediate must have a producing chain
+SELECT c.commodity_id, c.name
+FROM commodities c
+WHERE c.tier = 'intermediate'
+  AND c.commodity_id NOT IN (
+      SELECT output_commodity_id FROM production_chains
+  );
+-- Expected: 0 rows  (all 10 intermediates have a producing chain)
+
+-- 805-5: Chain completeness — every final good must have a producing chain
+SELECT c.commodity_id, c.name
+FROM commodities c
+WHERE c.tier = 'final'
+  AND c.commodity_id NOT IN (
+      SELECT output_commodity_id FROM production_chains
+  );
+-- Expected: 0 rows  (all 9 finals have a producing chain)
+
+-- 805-6: Services have NO producing chains (they are demand sinks, not outputs)
+SELECT c.commodity_id, c.name
+FROM commodities c
+WHERE c.tier IN ('service_professional', 'service_luxury')
+  AND c.commodity_id IN (SELECT output_commodity_id FROM production_chains);
+-- Expected: 0 rows
+
+-- 805-7: Raw materials have NO producing chains (they are inputs, not outputs)
+SELECT c.commodity_id, c.name
+FROM commodities c
+WHERE c.tier = 'raw'
+  AND c.commodity_id IN (SELECT output_commodity_id FROM production_chains);
+-- Expected: 0 rows  (fusion_fuel is intermediate, not raw — verify separately)
+
+-- 805-8: Coverage rule — corporations per major commodity type (D-175: 3+ per major type)
+-- "Major commodity type" = intermediates and finals with demand_model = 'market'
+-- This requires corp_presence.primary_operation to reference a commodity_id; adjust
+-- query if the schema uses a different field. Flag if the field is absent.
+SELECT commodity_id, COUNT(DISTINCT cp.corp_id) AS corp_count
+FROM corp_presence cp
+JOIN corporations c ON cp.corp_id = c.corp_id
+WHERE cp.primary_operation IS NOT NULL
+GROUP BY cp.primary_operation
+HAVING corp_count < 3;
+-- Expected: 0 rows (every commodity with corp presence has 3+ corps)
+
+-- 805-9: Coverage rule — inhabited systems > 100K pop have at least one corp
+SELECT ss.system_id, ss.proper_name
+FROM star_systems ss
+JOIN system_economy se ON ss.system_id = se.system_id
+WHERE se.population > 100000
+  AND NOT EXISTS (
+      SELECT 1 FROM corp_presence cp
+      JOIN bodies b ON cp.location_id = b.body_id AND cp.location_type = 'body'
+      WHERE b.system_id = ss.system_id
+      UNION
+      SELECT 1 FROM corp_presence cp
+      JOIN stations s ON cp.location_id = s.station_id AND cp.location_type = 'station'
+      WHERE s.system_id = ss.system_id
+  );
+-- Expected: 0 rows
+```
+
+### Exit code tests
+
+Run the pipeline with intentional violations and verify non-zero exit:
+
+**805-E1: Wiki name mismatch causes hard error**
+Temporarily rename a corporation in the DB to something the wiki doesn't know, re-run pipeline.
+Expected: non-zero exit with clear error message identifying the mismatch.
+
+**805-E2: Missing commodity coverage causes hard error**
+If coverage drops below 3 corps for any major commodity type, pipeline must exit non-zero.
+Expected: non-zero exit with specific commodity identified.
+
+**805-E3: Coverage failure for underpopulated system causes hard error**
+If an inhabited system with >100K pop has zero corp presence, pipeline must exit non-zero.
+Expected: non-zero exit with system_id identified.
+
+**805-E4: Dry-run still works**
+`python3 tooling/economy-db/import_economics.py --dry-run` must:
+- Not write to corp_presence
+- Run all validations and report but not halt on coverage gaps (dry-run output is informational)
+- Exit 0 (dry-run is for inspection, not a gate)
+
+Wait — check this with Dudley. If dry-run is meant to be a gate too, this should exit non-zero
+on validation failure. The existing pipeline exits 0 on dry-run. Confirm expected behavior
+before locking this test.
+
+### Regression markers
+
+- BF-1 through BF-7 still pass (new pipeline must not corrupt commodity/chain data)
+- `corp_presence` table's FK constraint still enforced (BF-6 analog for corps)
+- Existing `gate_links` bidirectionality (BF-5) unaffected
+
+---
+
+## #806 — Skeleton Economy_sim Binary
+
+**Spec ref:** D-176, D-177, D-178
+**Assigned to:** Dudley
+**Status:** backlog (blocked on #805)
+
+### What was changed
+
+- New Rust binary at `tooling/econ-sim/`
+- Reads systems.db: gate_links, commodities, production_chains, chain_inputs, corp_presence
+- Seeds per-corp-site productivity (5 dimensions, PRNG, log-normal distribution)
+- Layer 1 Leontief only (no inter-system trade, no currency)
+- Outputs per-node CSV: node_id, commodity_id, supply, demand, price, tick
+- `--stability-check` flag compiles (stub, not yet meaningful)
+
+### Build verification
+
+```bash
+cd tooling/econ-sim && cargo build
+# Expected: exits 0, no compile errors
+
+tooling/econ-sim --help
+# Expected: help text with --db, --stability-check, and --output flags visible
+```
+
+### CSV output verification
+
+```bash
+tooling/econ-sim --db server/data/systems.db --output /tmp/econ_out.csv
+```
+
+**806-1:** CSV file is created at the specified path
+**806-2:** CSV header contains: `node_id,commodity_id,supply,demand,price,tick`
+**806-3:** Row count is `active_nodes × 36` (760 active nodes × 36 commodities = ~27,360 rows)
+  - Acceptable range: ±10% of 27,360 (active node count may differ slightly from spec estimate)
+**806-4:** No `price` values are negative or zero for commodity types with non-zero base_price
+**806-5:** `tick` column is 0 for initial seeding output (first tick)
+
+### Productivity seeding verification
+
+**806-6: Standard node range (D-176)**
+```python
+# Pseudocode — inspect CSV output
+import csv, math
+prices = [float(row['price']) for row in csv.DictReader(open('/tmp/econ_out.csv'))]
+# For standard commodities, productivity multiplier range is 0.4–1.8x
+# Price variation relative to base_price should reflect this range
+base_price_by_id = { ... }  # from commodities table
+multipliers = [price / base_price_by_id[row['commodity_id']] for row in rows]
+assert all(0.3 <= m <= 2.0 for m in multipliers), "multiplier out of expected range"
+# Actual range check: most values should fall within 0.4–1.8x (log-normal tails permitted)
+```
+
+**806-7: Monopoly-source node range (D-176)**
+Nodes producing `lattice_grade_material` (production_ubiquity = 'monopolistic') must show
+tighter multiplier range: 0.7–1.4×. Verify variance is lower than standard nodes.
+
+**806-8: D-177 constraints — what must NOT vary**
+Verify the binary never seeds or varies:
+- Location of production (the set of nodes producing each commodity is fixed from DB data,
+  not random)
+- `lattice_grade_material` productivity: must stay within 0.7–1.4× (monopolistic ceiling)
+- Absence of seeded "starting disruptions" (no negative productivity, no corps with zero
+  initial output as a seeded state)
+
+**806-9: Corridor correlation (D-176 ~0.6)**
+Nodes in the same geographic corridor should have correlated productivity across runs with
+similar PRNG seeds. Spot-check: run binary twice with seeds differing by 1; nodes in same
+corridor should show ~0.6 Pearson correlation on their multipliers.
+
+### Stub stability check
+
+```bash
+tooling/econ-sim --stability-check
+# Expected: exits with some non-panic output, even if it's "stability tests not yet implemented"
+# Must NOT crash or segfault
+```
+
+### Regression markers
+
+- Atlas binary still builds: `cargo build --bin atlas`
+- D-177 lore constraints respected (see 806-8)
+
+---
+
+## #807 — Trade Flows and Stability Testing
+
+**Spec ref:** D-178, D-179
+**Assigned to:** Dudley
+**Status:** backlog (blocked on #806)
+
+**This is the most critical ticket. D-179 defines the exit condition for Phase 2.**
+
+### Tâtonnement parameters
+
+Verify from source code:
+- α = 0.03 (price adjustment speed)
+- β = 0.4 (damping coefficient)
+
+If these are configurable via CLI flags, document the defaults. If hardcoded, grep for them:
+```bash
+grep -r "0\.03" tooling/econ-sim/src/
+grep -r "0\.4" tooling/econ-sim/src/
+```
+
+### Floyd-Warshall startup performance
+
+```bash
+time tooling/econ-sim --stability-check 2>&1 | head -5
+# Expected: FW initialization completes in < 2s (D-178 spec: ~0.5s, allow 4x margin)
+# Flag if > 5s: likely iterating over all 3700 nodes instead of the ~760 active subgraph
+```
+
+### Market node tiering (D-178)
+
+**807-1:** Active node count is approximately 760 (inhabited bodies + all stations)
+
+```sql
+-- Count active market nodes per D-178 definition
+SELECT COUNT(*) FROM (
+    SELECT body_id AS node_id FROM bodies WHERE inhabited = 1
+    UNION ALL
+    SELECT station_id FROM stations
+);
+-- Expected: ~760 (accept 700–820 as the spec estimate may not match actual DB state)
+```
+
+**807-2:** Passive producer count is approximately 240
+
+```sql
+SELECT COUNT(*) FROM bodies WHERE inhabited = 0 AND population > 0;
+-- Expected: ~240 (bodies with economic activity but no market function)
+-- Adjust query based on how the sim defines "passive producer"
+```
+
+### Transport cost model
+
+Verify in source or via output that:
+**807-3:** Gate edges cost 5–12% per hop (inter-system)
+**807-4:** Orbital edges cost 1–3% (intra-system)
+**807-5:** Transport costs are applied to commodity prices, not abstracted away
+
+### D-179 Stability Tests
+
+```bash
+tooling/econ-sim --stability-check
+```
+
+All four tests are run by this flag (Tests 1–2 in #807, Tests 3–4 in #808). After #807:
+
+**Test 1: Cold-start convergence (D-179)**
+- Simulate 100 game-days from cold start
+- Measure price deviation from equilibrium at tick 100
+- **Pass criterion:** All active commodity prices within ±5% of equilibrium
+- **Fail indicators:** oscillation, monotonic drift, any price < 0
+
+**Test 2: Long-run stability (D-179)**
+- Simulate 1,000 game-days with zero external events
+- Measure maximum price drift from tick-0 equilibrium
+- **Pass criterion:** Zero drift > ±2% over the full 1,000-tick run
+- **Fail indicators:** slow drift accumulation, oscillation amplitude > 2%, any negative price
+
+### Stockpile buffer test
+
+**807-6:** Single-tick supply removal does not cause price explosion
+```
+procedure:
+  1. Run sim to equilibrium (100 ticks)
+  2. Inject a single tick of zero supply for one commodity at one node
+  3. Observe price at that node for next 5 ticks
+Expected: price rises but does not exceed 10× base_price
+Fail: price goes to infinity, NaN, or negative
+```
+
+### Regression markers
+
+- Test 1 and Test 2 must pass with `--stability-check` before #808 begins
+- If either test fails: do NOT mark #807 done, do NOT proceed to #808
+- α/β must be documented (in source comments or README) so future tuning is traceable
+
+---
+
+## #808 — Currency Zones and Exchange Rates
+
+**Spec ref:** D-171, D-172, D-174, D-181, D-186
+**Assigned to:** Dudley
+**Status:** backlog (blocked on #807)
+
+### Currency zone model
+
+**808-1:** Tractus↔Mark friction = ~3%
+Verify in cross-zone trade: cost of a commodity transiting from a TRACTUS_PRIMARY to a
+MARK_PRIMARY node is ~3% higher than same-zone transit at equal hop distance.
+
+**808-2:** Zero friction within MARK_PRIMARY zones
+Two nodes both in MARK_PRIMARY zones trading with each other incur no currency conversion cost
+beyond the standard transport cost.
+
+**808-3:** Sol is NOT a zone flag
+```sql
+SELECT COUNT(*) FROM star_systems WHERE currency_zone = 'SOL_PRIMARY';
+-- Expected: 0  (Sol is shadow economy only, D-171)
+```
+
+**808-4:** Exchange rate is driven by trade balance, not hardcoded
+The Tractus/Mark exchange rate must change between runs (or across ticks as trade flows change).
+Hardcoded rates are a test failure.
+
+### Signal vocabulary (D-181)
+
+All 7 signals must be present in sim output per active node:
+
+**808-5:**
+```
+1. price_current           — present in output
+2. price_trend             — present in output (direction + rate)
+3. trade_flow_volume       — present in output
+4. corporate_presence      — present in output
+5. stockpile_weeks         — present in output
+6. production_vs_baseline  — present in output
+7. official_coverage_ratio — present in output (derived from shadow_economy_intensity)
+```
+
+Edge case: For `official_coverage_ratio`, verify nodes with no shadow economy intensity
+(TRACTUS_PRIMARY core systems) produce `official_coverage_ratio = 1.0` (formal economy
+covers 100% of activity), not NULL.
+
+### gate_energy_connected demand reduction (D-186)
+
+**808-6:** Nodes with `gate_energy_connected = true` show `fusion_fuel` demand ~0.3× baseline
+- Run sim on a TRACTUS_PRIMARY system (gate_energy_connected = true)
+- Run sim on a MARK_PRIMARY system (gate_energy_connected = false)
+- Compare `fusion_fuel` demand signal: on-grid node demand must be ~30% of off-grid
+
+**808-7:** Industrial chain inputs are NOT reduced (D-186)
+- `smelt_ore` still requires `fusion_fuel` at 0.3 coefficient regardless of gate energy
+- `alloy_fabrication` still requires `fusion_fuel` at 0.2 coefficient
+- `electronics_fabrication` still requires `fusion_fuel` at 0.2 coefficient
+
+### D-179 Tests 3–4
+
+**Test 3: Shock response (D-179)**
+- Apply a single supply shock to one commodity at one node
+- **Pass criteria:**
+  - Cascade propagates to dependent commodities (Leontief input scarcity visible)
+  - Recovery to within 10% of pre-shock price within 200 ticks
+  - No price explosions (no value > 100× base_price)
+  - No negative prices
+- **Fail indicators:** runaway cascade, no recovery, shock isolated (no cascade = broken Leontief)
+
+**Test 4: Cross-zone trade balance (D-179)**
+- Increase trade volume across a TRACTUS_PRIMARY / MARK_PRIMARY boundary
+- **Pass criteria:**
+  - Exchange rate adjusts in response (Tractus/Mark ratio changes)
+  - Rate re-stabilizes within 50 ticks
+  - Friction cost is visible (cross-zone goods 3% more expensive than same-zone equivalent)
+- **Fail indicators:** no rate adjustment, infinite oscillation, rate diverges
+
+All four D-179 tests must pass before #809 begins.
+
+### Regression markers
+
+- Tests 1 and 2 from #807 must still pass with currency layer active
+- Tractus prices are still the numeraire (no price expressed in Mark or Sol units)
+
+---
+
+## #809 — Corporate Agent Behavior
+
+**Spec ref:** D-175, D-178, D-180, D-181
+**Assigned to:** Dudley
+**Status:** backlog (blocked on #808, #799, #800)
+
+### Corporate data loading
+
+**809-1:** Corporations are loaded from DB, not hardcoded
+```bash
+grep -r "hardcoded\|\"Gate Corporation\"\|\"Vethara\"" tooling/econ-sim/src/
+# Expected: corporation names should appear only in test fixtures or SQL queries,
+# not as string literals in behavioral logic
+```
+
+**809-2:** Behavioral archetype template is read from TOML
+```bash
+ls wiki/economics/archetypes/behavioral.toml
+# Expected: file exists (created by copy team per sprint briefing)
+```
+
+**809-3:** Each archetype is instantiated per corporation from corp_presence
+```sql
+-- Every corporation with corp_presence rows has a behavioral_archetype in DB
+SELECT COUNT(*) FROM corp_presence cp
+JOIN corporations c ON cp.corp_id = c.corp_id
+WHERE c.behavioral_archetype IS NULL;
+-- Expected: 0  (all corps with presence have an archetype assigned)
+```
+
+### Six behavioral archetypes (D-175)
+
+**809-4:** All 6 archetypes are implemented
+```bash
+grep -r "Monopolist\|Distributor\|Producer\|Specialist\|Cooperative\|Intermediary" \
+    tooling/econ-sim/src/
+# Expected: all 6 appear in behavioral logic, not just data loading
+```
+
+**809-5:** Archetypes produce distinguishably different behavior
+Run stability check with only Monopolist corps vs. only Cooperative corps in a test system.
+Price signals should differ between the two runs. If all archetypes produce identical output,
+the behavioral differentiation is not implemented.
+
+### EconEvent stub (D-180)
+
+**809-6:** EconEvent struct compiles with all required fields
+```bash
+grep -r "EconEvent" tooling/econ-sim/src/
+# Expected: struct definition with: target, effect, duration, visibility fields
+```
+
+**809-7:** Visibility variants are defined
+```bash
+grep -r "Global\|Proximate\|Disclosed\|Hidden" tooling/econ-sim/src/
+# Expected: all 4 visibility variants present in the EconEvent type
+```
+
+**809-8:** Event handler is a no-op (not exercised in Phase 2)
+Any call to `handle_event(EconEvent { ... })` should produce no observable simulation change.
+The port must compile and accept events without crashing.
+
+### Signal completeness (D-181)
+
+**809-9:** All 7 signals produced per active node with agents active
+Repeat 808-5 checks with corporate agents running. Agent behavior must not suppress or break
+signal production.
+
+**809-10:** `production_vs_baseline` reflects agent output vs seeded baseline
+A Monopolist corp restricting supply should show `production_vs_baseline < 1.0`.
+A Cooperative corp operating at full capacity should show `production_vs_baseline ≈ 1.0`.
+
+### D-179 Full Test Suite with Agents Active
+
+**This is the Phase 2 exit condition.**
+
+```bash
+tooling/econ-sim --stability-check
+```
+
+**809-11:** All four stability tests pass with corporate agents active:
+- Test 1: Cold-start convergence ±5% within 100 game-days
+- Test 2: Long-run stability ±2% over 1,000 game-days
+- Test 3: Shock response, recovery within 200 ticks, no explosions or negatives
+- Test 4: Cross-zone balance re-stabilizes within 50 ticks
+
+If agents CAUSE instability that wasn't present in #808, the agent behavioral parameters need
+tuning — this is a model bug, not a design decision. Investigate price-setting behavior before
+concluding the architecture is wrong.
+
+### Regression markers
+
+- All prior D-179 tests still pass
+- EconEvent handler does not crash on any valid input permutation
+- `behavioral.toml` is a required file — binary must error on missing file with a clear message
+
+---
+
+## Checklist: Verification Order
+
+| Order | Ticket | Gate condition | Who verifies |
+|-------|--------|----------------|--------------|
+| 1 | Pre-flight BF-1–7 | DB baseline valid | Hoshe, post #804 |
+| 2 | #813 | Schema correct, defaults correct | Hoshe, when Tyre delivers |
+| 3 | #805 | corp_presence populated, coverage valid, exits non-zero on failure | Hoshe, when Dudley delivers |
+| 4 | #806 | Binary builds, CSV output correct, seeding in range | Hoshe, when Dudley delivers |
+| 5 | #807 | Tests 1+2 pass `--stability-check` | Hoshe, when Dudley delivers |
+| 6 | #808 | Tests 3+4 pass, all 7 signals present | Hoshe, when Dudley delivers |
+| 7 | #809 | All 4 D-179 tests pass with agents active | Hoshe, when Dudley delivers |
+
+**Phase 2 is complete only when step 7 passes.** Steps 5 through 7 are the formal exit gate
+per D-179 and D-183.
+
+---
+
+## Appendix: Quick Reference — D-179 Stability Criteria
+
+| Test | Condition | Pass threshold | Run at |
+|------|-----------|---------------|--------|
+| 1 | Cold-start convergence | ±5% of equilibrium within 100 game-days | #807 |
+| 2 | Long-run stability | ±2% drift over 1,000 game-days, zero events | #807 |
+| 3 | Shock response | Recovery within 200 ticks, no explosions, no negatives | #808 |
+| 4 | Cross-zone trade balance | Re-stabilizes within 50 ticks | #808 |
+
+All four must pass simultaneously with corporate agents active (#809) for Phase 2 sign-off.