# MEMORY

Session memory for durable decisions, state, and gotchas. Keep concise, remove obsolete entries.

## Decisions

- Engine: Godot 4.3 stable (official editor build, `~/.local/bin/godot`). The system's preinstalled `godot-runner` (4.7.2, Fedora) cannot load projects from arbitrary paths because it was compiled without path overrides; use the official editor binary instead.
- Language: GDScript. All cross-file references use explicit `preload()` constants (not `class_name` globals) so scripts compile in headless `--script` runs without the editor's class cache.
- Test framework deviation: the project uses a custom minimal headless test runner (`src/test/test_runner.gd`) instead of GUT, because GUT needs the editor plugin. CI runs it with `--headless`.
- Eventing: no autoload signal bus. `ShiftCoordinator` owns an `EventBus` instance (`src/core/event_bus.gd`) passed to subsystems; subsystems emit only when a bus is assigned. Autoloads at parse time are unreliable under `--script`.
- Static signals are not available in Godot 4.3 GDScript ("Expected func or var after static") — do not use them.
- GDScript lambdas capture local variables **by value**; mutating a captured local inside a lambda does not affect the outer variable. Use member functions for accumulators in tests.
- Prototype shift duration defaults to 300 s for testing; production targets 10-15 minutes per PLAN.md.
- RNG: NPC reactions and event scheduling are seedable for deterministic tests.

## Current State

- Core simulation, three scenarios, headless tests (**52 passing**), and a first-person prototype with interaction HUD, access inspection, radio (assist + emergency hold-to-confirm), debug overlay, and shift review are implemented and green.
- NPC avatars now walk to per-intent waypoints (`VenueScenario.waypoint_for_intent`): enter/trespass/deliver/arrive → entrance, photo/film/perform/wander/roam → sidewalk, sit → steps_end. `NpcAvatar.setup` takes an explicit `door_position`.
- Returning-trespasser behavior: `NpcProfile.return_probability` (trespasser 0.6, mental-crisis 0.4, others 0). `NPCController._maybe_schedule_return()` moves a directed-away NPC to `LOITERING_DISTANT`; `tick_return(delta)` fires after 20-60s and transitions back to `APPROACH`. `NpcAvatar._advance_fsm` re-targets the door on return.
- Perception pass: `NPCController.perceive_guard(distance)` returns `{noticed, band, reaction}` with bands `unaware` (>6m), `aware` (2-6m), `near` (<2m). Near + temperament ≥0.6 → ARGUE, else COMPLY. `GameManager._perception_pass()` feeds real guard distance each physics tick and logs first-time notice.
- Responder dispatch: `RadioSystem` tracks `pending_calls` and decrements `arrival_delay_s` in `tick`; emits `responder_arrived` when a call's delay elapses. `RadioSystem.responder_outcome(call)` maps danger/weapons → command/restraint/evacuation/arrest. `GameManager._on_responder_arrived` spawns a `RESPONDER` avatar at the entrance and logs the outcome. HUD shows an emergency-radio cooldown label via `_update_radio_cooldown`.
- Wand screening (Joke Shop): `WandScreener` (new `src/core/wand_screener.gd`) classifies carried items as prohibited (`weapon/knife/gun/blade`) vs false-alarm (`keys/belt/phone/coins/watch/buckle`) vs clear. `NpcProfile.carried_items` holds guest items. `GameManager` binds `W` to `_toggle_wand_screening` and `A`/`D` to `decide_wand`; `decide_access` blocks admission at wand venues until `controller.screened` is true. `VenueScenario.door_staff_lines` holds venue-specific door-staff dialogue (Joke Shop has id/ticket/wand/refusal/prohibited lines).
- Polish/accessibility: tone picker (`T` cycles `selected_tone` via `TONE_ORDER`; HUD `tone_label`), aim-free targeting (`Tab` cycles nearby NPCs within `NEARBY_RADIUS`), color-coded escalation indicator (`Hud.set_escalation`), procedural audio (`AudioFeedback` node generates sine tones for confirm/radio/escalation/deny), and a centralized `Strings` table (`src/core/strings.gd`, `lookup`/`fmt`) for localization. NOTE: `Strings.get` was renamed to `Strings.lookup` because `get` collides with `Object.get`.
- Newly added: LATE shift phase (start 700s) with a reachability test; PROTESTER archetype + events + colors; CALL_SOMEONE reaction; `DoorState` core class + `L` binding + visual indicator; flashlight (`G`, SpotLight3D, perception bonus at evening/late); persistence wired (`Save.save_shift_result` on shift end, history + best score on the review screen); `NavigationRegion3D` flat navmesh + `NavigationAgent3D` NPC paths (steps now visual-only); strings moved to `res://content/strings.en.json` (41 keys, loader keeps `lookup`/`fmt`); `export_presets.cfg` (Linux/Windows/macOS) + `tools/build_releases.sh` + `docs/RELEASING.md`; README Downloads section.
- Run tests: `godot --headless --path . --script res://src/test/test_runner.gd`
- Boot check: `godot --headless --path . --quit-after 120`
- Screenshot tools: `godot --path . -s res://src/test/take_screenshot.gd` (single shot to `user://screenshot.png`); `godot --path . -s res://src/test/capture_screenshots.gd` (staged README gallery shots to `user://screenshots/`, copied to `docs/screenshots/`).
- Release build verified locally: export templates for 4.3 installed at `~/.local/share/godot/export_templates/4.3.stable/`; `./tools/build_releases.sh` produced Linux/Windows/macOS artifacts for 0.1.0 in `build/` and the Linux binary passed a headless smoke test. Publishing to Gitea still needs a token (see `tools/publish_release.sh`, `docs/RELEASING.md`).

## Known Issues / Notes

- RefCounted reference cycle: `NPCController` holds an `FSM` that holds a back-reference to its owner, so test suites report "resources still in use at exit". Benign (process exit), but worth breaking later (e.g. `WeakRef` or explicit `dispose()`).
- Headless (dummy renderer) logs "Parameter m is null" from `mesh_get_surface_count`; it does not occur with a real GL driver and does not affect logic.
- Steps are visual-only (no collider) so NPCs can path to the entrance; the guard spawns on the landing so it never needs to climb.
- Persistence tests write into the real `user://shift_results.json` (harmless local pollution of the demo history).
- macOS export required `rendering/textures/vram_compression/import_etc2_astc=true` in `project.godot` (universal build demands ETC2 ASTC enabled).
- Joke Shop `door_staff_lines` authored but not yet surfaced in the prototype UI (tracked in TODO).

## Open Questions

- Whether the responder avatar should be playable/controllable or purely scripted.
- Localization target languages beyond English.
- macOS notarization approach for broad distribution.

## Plan vs TODO Gaps (evaluated 2026-10-31, all resolved)

All previously identified gaps are now implemented and covered by tests/smoke items: PROTESTER archetype, door lock/secure, flashlight, CALL_SOMEONE reaction, LATE phase fix, shift-result persistence, NavigationAgent3D movement, and JSON-backed localization. Remaining backlog lives in `TODO.md`.