- HashMap → BTreeMap throughout econ-sim for deterministic iteration (D-010)
- Fix cost_factor: multiplicative gate×zone instead of additive (trade.rs)
- Extract derive_seed to shared prng.rs, consolidate FNV-1a implementation
- Rename run_shock_test → run_no_explosion_check (not D-179 Test 3)
- Deduplicate cross-zone FX rate collection in Test 4
- Replace ORDER BY RANDOM() with deterministic ordering + ChaCha8Rng
- Make commodity coverage failure a hard error consistent with D-175
- Fix gap-fill off-by-one (4 corps → 3 when coverage = 0)
- Correct test report: EconEvent exists, location_type is body/station
All four D-179 stability tests still pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add D-180 EconEvent struct (target, effect, duration, visibility enums)
with no-op handler to satisfy #809 spec. Import MARK_PRIMARY and MIXED
currency zone assignments from wiki/economics/currency_zones.toml (D-172).
All four D-179 stability tests now pass.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Test plan covering #806, #807, #808, #809 acceptance criteria aligned
with D-179 stability tests and Phase 2 economics deliverable requirements.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>