> For the complete documentation index, see [llms.txt](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase39-session02-depth-resolver-migration/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase39-session02-depth-resolver-migration` **Started**: 2026-06-30 19:11 **Last Updated**: 2026-06-30 19:48

***

## Session Progress

| Metric              | Value     |
| ------------------- | --------- |
| Tasks Completed     | 20 / 20   |
| Estimated Remaining | 0 minutes |
| Blockers            | 0         |

***

## Task Log

### 2026-06-30 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed
* [x] Tools available
* [x] Directory structure ready

***

### Task T001 - Verify Session 01 registry, baseline, and golden tests are present before migration

**Started**: 2026-06-30 19:11 **Completed**: 2026-06-30 19:12 **Duration**: 1 minute

**Notes**:

* Confirmed the Session 01 level registry exports authored depths, run policy, specs, lookup errors, `levelSpecForDepth()`, and registry validation from `content/index.ts`.
* Confirmed `content/levels.ts` contains the three authored level specs for depths 1-3 with baseline generation, placement, guarantee, objective, and finale metadata.
* Confirmed baseline and golden determinism suites already record current helper routing, generated world summaries, and first-turn summaries before migration.

**Files Changed**:

* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Created session progress log with T001 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T001 complete and added progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/content/__tests__/levels.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts`
  * Result: PASS - 3 test files passed, 10 tests passed.
  * Evidence: Vitest completed in 386ms with registry, baseline, and golden determinism coverage green before migration.
* UI product-surface check: N/A - Runtime test and registry inspection only; no user-facing route changed.
* UI craft check: N/A - Runtime test and registry inspection only; no UI changed.

***

### Task T002 - Audit depth resolver call sites and confirm protocol baseline versus guarantee ownership

**Started**: 2026-06-30 19:12 **Completed**: 2026-06-30 19:15 **Duration**: 3 minutes

**Notes**:

* Audited depth-based helpers and call sites with `rg`, then inspected `world-generator.ts`, `world-placement.ts`, `run-factory.ts`, `simulation.ts`, `floor-arc.ts`, `themes.ts`, `prefabs.ts`, `protocols.ts`, `terminals.ts`, and `audio.ts`.
* Confirmed baseline protocol placement currently happens in `createAiRogueWorld()` through `protocolForDepth(depth)`.
* Confirmed authored guarantee protocols currently happen in `applyFloorArc()` and are applied by `createAiRogueRun()` and `descendToNextFloor()`, keeping baseline protocol and guarantee protocol as separate concepts for the migration.
* Confirmed depth branches also control theme, room modifier, exit guard, prefab, terminal, music, floor objective, and arc lesson behavior.

**Files Changed**:

* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T002 audit evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T002 complete and updated progress tracking.

**Verification**:

* Command/check: `rg -n "ForDepth|depth|applyFloorArc|protocolForDepth|prefabForDepth|terminalForDepth|musicTrackForDepth|placeExitGuard|floorArcForDepth|floorObjectiveForDepth|sectorThemeForDepth|themeForDepth" src/extensions/ai-rogue/runtime/{world-generator.ts,world-placement.ts,run-factory.ts,simulation.ts,floor-arc.ts,themes.ts,prefabs.ts,protocols.ts,terminals.ts,audio.ts}`
  * Result: PASS - Located the migration call sites and confirmed baseline versus guarantee protocol ownership.
  * Evidence: `world-generator.ts` uses `protocolForDepth()` for baseline pickup placement; `floor-arc.ts` owns `guaranteedProtocol`; `run-factory.ts` and `simulation.ts` apply the arc after world generation.
* UI product-surface check: N/A - Runtime call-site audit only; no user-facing route changed.
* UI craft check: N/A - Runtime call-site audit only; no UI changed.

***

### Task T003 - Export needed registry projection helpers without boundary imports

**Started**: 2026-06-30 19:15 **Completed**: 2026-06-30 19:16 **Duration**: 1 minute

**Notes**:

* Added `authoredLevelSpecForDepth()` as a non-throwing lookup for authored depths so compatibility helpers can project registry values for depths 1-3 and keep explicit legacy fallback behavior elsewhere.
* Reused `authoredLevelSpecForDepth()` inside `levelSpecForDepth()` so the throwing authored-main-run lookup and the non-throwing compatibility lookup share one search path.
* Exported the helper from `content/index.ts` without adding route, renderer, bridge, generated-data, telemetry, or PixiJS imports.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/content/levels.ts` - Added non-throwing authored-depth lookup and reused it in `levelSpecForDepth()`.
* `src/extensions/ai-rogue/runtime/content/index.ts` - Exported `authoredLevelSpecForDepth()`.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T003 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T003 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/content/__tests__/levels.test.ts`
  * Result: PASS - 1 test file passed, 6 tests passed.
  * Evidence: Existing registry validation and authored-main-run rejection coverage remained green.
* Command/check: `rg -n "from \"(\\.\\.?/)*.*(renderer|pixi|routes|bridge|data|generated)" src/extensions/ai-rogue/runtime/content src/extensions/ai-rogue/runtime/{themes.ts,floor-arc.ts,prefabs.ts,protocols.ts,terminals.ts,audio.ts,world-generator.ts,run-factory.ts,simulation.ts,world-placement.ts}`
  * Result: PASS - No matching forbidden boundary imports were present in content or target runtime resolver modules.
  * Evidence: `rg` exited with no matches.
* UI product-surface check: N/A - Runtime content export only; no user-facing route changed.
* UI craft check: N/A - Runtime content export only; no UI changed.

**BQC Fixes**:

* Contract alignment: Added a nullable authored lookup instead of catching lookup exceptions in helpers, keeping authored-run errors and compatibility fallback behavior distinct (`src/extensions/ai-rogue/runtime/content/levels.ts`).

***

### Task T004 - Add helper projection types for level generation and guarantees

**Started**: 2026-06-30 19:16 **Completed**: 2026-06-30 19:18 **Duration**: 2 minutes

**Notes**:

* Added exported projection aliases for generation, placement, guarantee, and objective sub-shapes from `AiRogueLevelSpec`.
* Kept the aliases derived from the canonical level spec contract so future resolver code cannot drift from the registry shape.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/content/types.ts` - Added `AiRogueLevelGenerationProjection`, `AiRogueLevelPlacementProjection`, `AiRogueLevelGuaranteeProjection`, and `AiRogueLevelObjectiveProjection`.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T004 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T004 complete and updated progress tracking.

**Verification**:

* Command/check: `bun run typecheck`
  * Result: PASS - TypeScript completed with `tsc --noEmit`.
  * Evidence: No type errors after exporting the projection aliases.
* UI product-surface check: N/A - Type-only runtime content change; no user-facing route changed.
* UI craft check: N/A - Type-only runtime content change; no UI changed.

**BQC Fixes**:

* Contract alignment: Projection aliases derive from `AiRogueLevelSpec` rather than duplicating sub-shapes (`src/extensions/ai-rogue/runtime/content/types.ts`).

***

### Task T005 - Derive AI\_ROGUE\_MAX\_DEPTH from authored level specs

**Started**: 2026-06-30 19:18 **Completed**: 2026-06-30 19:19 **Duration**: 1 minute

**Notes**:

* Replaced the hardcoded `AI_ROGUE_MAX_DEPTH = 3` with `AI_ROGUE_LEVEL_SPECS.length` while preserving the public export name.
* Kept the import inside pure runtime content boundaries.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/run-factory.ts` - Imported `AI_ROGUE_LEVEL_SPECS` and derived `AI_ROGUE_MAX_DEPTH` from the registry length.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T005 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T005 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 1 test file passed, 2 tests passed.
  * Evidence: `content-baseline.test.ts` still asserted `AI_ROGUE_MAX_DEPTH` is 3 from the authored three-spec registry.
* UI product-surface check: N/A - Runtime constant derivation only; no user-facing route changed.
* UI craft check: N/A - Runtime constant derivation only; no UI changed.

**BQC Fixes**:

* Contract alignment: Full-run depth now tracks the authored registry length instead of a separate literal (`src/extensions/ai-rogue/runtime/run-factory.ts`).

***

### Task T006 - Add applyLevelGuarantees and keep applyFloorArc as a compatibility shim

**Started**: 2026-06-30 19:19 **Completed**: 2026-06-30 19:21 **Duration**: 2 minutes

**Notes**:

* Added `applyLevelGuarantees(world, levelSpec)` to apply authored level guarantees directly from a resolved registry spec.
* Refactored `applyFloorArc(world, depth)` into a compatibility shim over the same internal guarantee application path.
* Updated `floorArcForDepth()` so authored depths project from level specs while legacy deeper depths keep the existing `AI_ROGUE_FLOOR_ARCS` fallback object identity.
* Preserved deterministic free-tile ordering by reusing the existing sorted free-tile cursor algorithm.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/floor-arc.ts` - Added level-spec projection, `applyLevelGuarantees()`, and shared guarantee application internals.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T006 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T006 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 2 test files passed, 7 tests passed.
  * Evidence: Floor-arc shim behavior, run augmentation, handcrafted-world bypass, and current content baseline remained green.
* UI product-surface check: N/A - Runtime guarantee migration only; no user-facing route changed.
* UI craft check: N/A - Runtime guarantee migration only; no UI changed.

**BQC Fixes**:

* Contract alignment: Authored guarantee application now accepts the resolved level spec directly, while depth-based callers remain supported by a shim (`src/extensions/ai-rogue/runtime/floor-arc.ts`).

***

### Task T007 - Update theme compatibility helpers to project authored depth values from level specs

**Started**: 2026-06-30 19:21 **Completed**: 2026-06-30 19:23 **Duration**: 2 minutes

**Notes**:

* Updated `themeForDepth()` to read `levelSpec.generation.themeId` for authored depths while preserving the historical clamped theme fallback for non-authored depths.
* Fixed an import-cycle failure discovered by the first test run by changing internal runtime imports from the `content` barrel to `content/levels` or `content/types`; the public barrel export from T003 remains available for external consumers.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/themes.ts` - Projected authored theme IDs from level specs and preserved fallback theme order.
* `src/extensions/ai-rogue/runtime/floor-arc.ts` - Switched internal imports away from the content barrel to avoid runtime cycles.
* `src/extensions/ai-rogue/runtime/run-factory.ts` - Switched max-depth import away from the content barrel to avoid runtime cycles.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T007 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T007 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: FAIL, then fixed - Initial run failed with `TypeError: Cannot convert undefined or null to object` from a `themes.ts` <-> content barrel initialization cycle.
  * Evidence: The failure occurred before tests ran in `themes.test.ts`; internal imports were changed to direct level/type modules.
* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts`
  * Result: PASS - 3 test files passed, 13 tests passed.
  * Evidence: Authored theme projection, fallback theme behavior, content baseline, and floor-arc shim coverage are green after the cycle fix.
* UI product-surface check: N/A - Runtime theme resolver change only; no user-facing route changed.
* UI craft check: N/A - Runtime theme resolver change only; no UI changed.

**BQC Fixes**:

* Contract alignment: Authored depths now source theme IDs from the level registry while non-authored direct helper calls keep the legacy fallback (`src/extensions/ai-rogue/runtime/themes.ts`).
* Failure path completeness: Removed a runtime initialization cycle introduced by internal barrel imports (`src/extensions/ai-rogue/runtime/themes.ts`, `src/extensions/ai-rogue/runtime/floor-arc.ts`, `src/extensions/ai-rogue/runtime/run-factory.ts`).

***

### Task T008 - Migrate prefab, terminal, baseline protocol, and music helpers to authored level specs

**Started**: 2026-06-30 19:23 **Completed**: 2026-06-30 19:25 **Duration**: 2 minutes

**Notes**:

* Updated `prefabForDepth()` to return `levelSpec.placements.prefabId` for authored depths and retain the prefab-order fallback for non-authored direct calls.
* Updated `terminalForDepth()` to return `levelSpec.placements.terminalId` for authored depths and retain the terminal-order fallback for non-authored direct calls.
* Updated `protocolForDepth()` to return `levelSpec.generation.baselineProtocolId` for authored depths, keeping this separate from `levelSpec.guarantees.protocolId`.
* Updated `musicTrackForDepth()` to return `levelSpec.generation.musicTrackId` for authored integer depths while preserving the historical direct-call fallback.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/prefabs.ts` - Added authored prefab projection with legacy fallback.
* `src/extensions/ai-rogue/runtime/terminals.ts` - Added authored terminal projection with legacy fallback.
* `src/extensions/ai-rogue/runtime/protocols.ts` - Added authored baseline protocol projection with legacy fallback.
* `src/extensions/ai-rogue/runtime/audio.ts` - Added authored music projection with legacy fallback.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T008 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T008 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts src/extensions/ai-rogue/runtime/__tests__/audio.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 5 test files passed, 51 tests passed.
  * Evidence: Existing helper behavior, audio safety tests, and current depth 1-3 baseline outputs stayed green.
* UI product-surface check: N/A - Runtime helper migration only; no user-facing route changed.
* UI craft check: N/A - Runtime helper migration only; no UI changed.

**BQC Fixes**:

* Contract alignment: Helper projections now distinguish baseline protocol placement from guaranteed protocol additions by reading separate `generation` and `guarantees` fields (`src/extensions/ai-rogue/runtime/protocols.ts`, `src/extensions/ai-rogue/runtime/floor-arc.ts`).

***

### Task T009 - Change exit guard placement to accept a resolved guard kind

**Started**: 2026-06-30 19:25 **Completed**: 2026-06-30 19:27 **Duration**: 2 minutes

**Notes**:

* Changed `findExitGuardSpawn()` so it accepts an `AiRogueEnemyKind` instead of deriving guard kind from depth.
* Kept `createAiRogueWorld()` temporarily deriving the current guard kind from depth until the resolved level-spec generator task routes it through `levelSpec.placements.exitGuardKind`.
* Preserved guard placement order and adjacency behavior.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/world-placement.ts` - Replaced depth parameter with resolved guard kind.
* `src/extensions/ai-rogue/runtime/world-generator.ts` - Passed the existing depth-derived guard kind into placement to preserve behavior before the level-spec generator migration.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T009 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T009 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 3 test files passed, 12 tests passed.
  * Evidence: World placement tests, fixed depth 1-3 golden summaries, and content baseline stayed green.
* UI product-surface check: N/A - Runtime placement helper change only; no user-facing route changed.
* UI craft check: N/A - Runtime placement helper change only; no UI changed.

**BQC Fixes**:

* Contract alignment: Exit guard placement now consumes a resolved guard kind instead of owning depth policy (`src/extensions/ai-rogue/runtime/world-placement.ts`).

***

### Task T010 - Extend world generation options with an optional resolved level spec

**Started**: 2026-06-30 19:27 **Completed**: 2026-06-30 19:29 **Duration**: 2 minutes

**Notes**:

* Added `levelSpec?: AiRogueLevelSpec` to `AiRogueWorldGenerationOptions`.
* Resolved one authored spec per generated floor from either the provided `levelSpec` or `authoredLevelSpecForDepth(depth)`.
* Derived depth from a provided `levelSpec` when no explicit depth is passed, and added an explicit depth/spec mismatch error for invalid caller contracts.
* Began consuming the resolved spec for `roomModifier` while preserving explicit `options.roomModifier` overrides and non-authored depth fallback.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/world-generator.ts` - Added level-spec option, resolver, mismatch error, and registry-backed room modifier.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T010 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T010 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 3 test files passed, 12 tests passed.
  * Evidence: Generated world behavior, fixed depth 1-3 golden summaries, and content baseline remained unchanged with the resolver path active.
* UI product-surface check: N/A - Runtime generation option change only; no user-facing route changed.
* UI craft check: N/A - Runtime generation option change only; no UI changed.

**BQC Fixes**:

* Contract alignment: Generator callers can now pass the same resolved level spec that other runtime paths consume, with explicit mismatch handling (`src/extensions/ai-rogue/runtime/world-generator.ts`).
* Failure path completeness: Invalid `depth` plus `levelSpec.depth` combinations throw an intentional stable error instead of silently generating a mixed-policy floor (`src/extensions/ai-rogue/runtime/world-generator.ts`).

***

### Task T011 - Route world-generation authored decisions through the resolved level spec

**Started**: 2026-06-30 19:29 **Completed**: 2026-06-30 19:31 **Duration**: 2 minutes

**Notes**:

* Routed generated floor theme, enemy table, room modifier, exit guard kind, prefab, terminal, and baseline protocol through the single resolved `levelSpec` when present.
* Preserved non-authored depth fallback helpers for direct compatibility calls and future deeper fallback generation.
* Tightened explicit `levelSpec` prefab handling so `prefabId: null` remains an intentional no-prefab decision instead of falling through to legacy depth fallback.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/world-generator.ts` - Consumed resolved level specs for authored generation decisions.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T011 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T011 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts`
  * Result: PASS - 7 test files passed, 38 tests passed.
  * Evidence: World generation, golden determinism, content baseline, and migrated helper suites remained green with spec-owned generation decisions.
* UI product-surface check: N/A - Runtime generation migration only; no user-facing route changed.
* UI craft check: N/A - Runtime generation migration only; no UI changed.

**BQC Fixes**:

* Contract alignment: `createAiRogueWorld()` now uses one resolved level spec for all authored generated-floor decisions instead of resolving scattered depth policy across helpers (`src/extensions/ai-rogue/runtime/world-generator.ts`).
* Failure path completeness: Explicit level specs with nullable placement fields now keep their authored null decisions instead of falling through to legacy defaults (`src/extensions/ai-rogue/runtime/world-generator.ts`).

***

### Task T012 - Use applyLevelGuarantees during run creation while keeping handcrafted worlds unchanged

**Started**: 2026-06-30 19:31 **Completed**: 2026-06-30 19:33 **Duration**: 2 minutes

**Notes**:

* Resolved one run-level spec from `options.levelSpec` or authored depth in `createAiRogueRun()`.
* Passed the resolved spec into `createAiRogueWorld()` for generated authored floors.
* Switched generated authored floors to `applyLevelGuarantees()` and retained `applyFloorArc()` only for non-authored fallback depths.
* Preserved explicit handcrafted-world behavior by skipping generation guarantees and lesson events when `options.world` is provided.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/run-factory.ts` - Added run-level spec resolution and `applyLevelGuarantees()` usage in run creation.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T012 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T012 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts src/extensions/ai-rogue/runtime/__tests__/simulation.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 4 test files passed, 22 tests passed.
  * Evidence: Run creation, floor-arc handcrafted-world bypass, descent-adjacent simulation behavior, golden summaries, and content baseline remained green.
* UI product-surface check: N/A - Runtime run creation migration only; no user-facing route changed.
* UI craft check: N/A - Runtime run creation migration only; no UI changed.

**BQC Fixes**:

* Contract alignment: Run creation now passes the same resolved level spec into world generation and level guarantees for generated authored floors (`src/extensions/ai-rogue/runtime/run-factory.ts`).

***

### Task T013 - Use applyLevelGuarantees during descent to the next floor

**Started**: 2026-06-30 19:33 **Completed**: 2026-06-30 19:35 **Duration**: 2 minutes

**Notes**:

* Resolved the next authored level spec during `descendToNextFloor()`.
* Passed the resolved spec to `createAiRogueWorld()` and used `applyLevelGuarantees()` for authored next floors.
* Kept `applyFloorArc()` as fallback for non-authored depths and left descent event sequencing and floor objective assignment unchanged.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/simulation.ts` - Added descent-level spec resolution and `applyLevelGuarantees()` usage.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T013 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T013 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/simulation.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 3 test files passed, 17 tests passed.
  * Evidence: Descent behavior, fixed depth 1-3 golden summaries, and baseline generated behavior remained unchanged.
* UI product-surface check: N/A - Runtime descent migration only; no user-facing route changed.
* UI craft check: N/A - Runtime descent migration only; no UI changed.

**BQC Fixes**:

* Contract alignment: Descent now uses the same resolved level-spec guarantee path as run creation (`src/extensions/ai-rogue/runtime/simulation.ts`).

***

### Task T014 - Preserve depth 1-3 baseline and golden determinism expectations

**Started**: 2026-06-30 19:35 **Completed**: 2026-06-30 19:36 **Duration**: 1 minute

**Notes**:

* Confirmed no expected-output edits were made to the current depth 1-3 golden determinism or content baseline test files.
* Re-ran focused golden and baseline tests after the resolver migration.

**Files Changed**:

* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T014 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T014 complete and updated progress tracking.

**Verification**:

* Command/check: `git diff -- src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - No diff output.
  * Evidence: Existing depth 1-3 expected world and first-turn summaries were not edited.
* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 2 test files passed, 4 tests passed.
  * Evidence: Golden determinism and content baseline remained green after resolver migration.
* UI product-surface check: N/A - Test preservation checkpoint only; no user-facing route changed.
* UI craft check: N/A - Test preservation checkpoint only; no UI changed.

***

### Task T015 - Add resolver tests for authored projections, max depth, protocol separation, and legacy fallback

**Started**: 2026-06-30 19:36 **Completed**: 2026-06-30 19:38 **Duration**: 2 minutes

**Notes**:

* Added a focused resolver suite that asserts `AI_ROGUE_MAX_DEPTH` derives from `AI_ROGUE_LEVEL_SPECS.length`.
* Covered authored helper projection for theme, floor arc, objective, prefab, terminal, baseline protocol, and music.
* Added explicit protocol separation coverage for depth 2 baseline protocol (`trace-map`) versus guaranteed protocol (`trace-lance`).
* Added direct non-authored fallback assertions for theme, floor arc, prefab, terminal, protocol rotation, and music.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/depth-resolver.test.ts` - Added resolver projection and fallback coverage.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T015 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T015 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/depth-resolver.test.ts src/extensions/ai-rogue/runtime/__tests__/content-baseline.test.ts`
  * Result: PASS - 2 test files passed, 6 tests passed.
  * Evidence: New resolver assertions and existing content baseline are green.
* UI product-surface check: N/A - Runtime test-only change; no user-facing route changed.
* UI craft check: N/A - Runtime test-only change; no UI changed.

***

### Task T016 - Extend floor-arc tests for applyLevelGuarantees and applyFloorArc shim parity

**Started**: 2026-06-30 19:38 **Completed**: 2026-06-30 19:39 **Duration**: 1 minute

**Notes**:

* Added direct `applyLevelGuarantees()` coverage for depth 2 resolved level specs.
* Added parity coverage proving `applyFloorArc(world, 3)` equals `applyLevelGuarantees(world, levelSpecForDepth(3))` for authored depths.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts` - Added direct level guarantee and shim parity tests.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T016 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T016 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts src/extensions/ai-rogue/runtime/__tests__/depth-resolver.test.ts`
  * Result: PASS - 2 test files passed, 11 tests passed.
  * Evidence: Direct level guarantees, depth shim parity, and resolver projections are green.
* UI product-surface check: N/A - Runtime test-only change; no user-facing route changed.
* UI craft check: N/A - Runtime test-only change; no UI changed.

***

### Task T017 - Extend helper tests for registry-backed outputs

**Started**: 2026-06-30 19:39 **Completed**: 2026-06-30 19:41 **Duration**: 2 minutes

**Notes**:

* Added level-registry projection assertions to the theme, prefab, protocol, terminal, and audio helper suites.
* Covered music depth helper output directly in `audio.test.ts`, which previously exercised audio behavior but not `musicTrackForDepth()`.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/themes.test.ts` - Added authored theme projection assertions.
* `src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts` - Added authored prefab projection assertions.
* `src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts` - Added authored baseline protocol projection assertions.
* `src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts` - Added authored terminal projection assertions.
* `src/extensions/ai-rogue/runtime/__tests__/audio.test.ts` - Added authored music projection assertions.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T017 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T017 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`
  * Result: PASS - 5 test files passed, 60 tests passed.
  * Evidence: Helper-specific registry-backed output assertions are green alongside existing helper behavior tests.
* UI product-surface check: N/A - Runtime test-only change; no user-facing route changed.
* UI craft check: N/A - Runtime test-only change; no UI changed.

***

### Task T018 - Add deterministic route-safety tests for generated authored floors

**Started**: 2026-06-30 19:41 **Completed**: 2026-06-30 19:43 **Duration**: 2 minutes

**Notes**:

* Added BFS route-safety coverage for deterministic generated authored floors at depths 1-3.
* Asserted exits remain reachable from the start, exit guards stay adjacent and match authored guard kind, prefab signatures remain connected to route-safe generation, and terminal/vault impassable tiles do not block the route.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/world.test.ts` - Added route-safety coverage and local BFS/signature helpers.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T018 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T018 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/golden-determinism.test.ts`
  * Result: PASS - 2 test files passed, 11 tests passed.
  * Evidence: New route-safety assertions and fixed depth 1-3 golden determinism are green.
* UI product-surface check: N/A - Runtime test-only change; no user-facing route changed.
* UI craft check: N/A - Runtime test-only change; no UI changed.

***

### Task T019 - Run focused resolver gate and typecheck

**Started**: 2026-06-30 19:43 **Completed**: 2026-06-30 19:45 **Duration**: 2 minutes

**Notes**:

* Ran the focused AI Rogue runtime gate for resolver, world, simulation, floor-arc, theme, prefab, protocol, terminal, and audio coverage.
* Ran the project TypeScript typecheck.

**Files Changed**:

* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T019 evidence.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T019 complete and updated progress tracking.

**Verification**:

* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/depth-resolver.test.ts src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/simulation.test.ts src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`
  * Result: PASS - 9 test files passed, 93 tests passed.
  * Evidence: Focused resolver and route-safety gate completed in 1.35s.
* Command/check: `bun run typecheck`
  * Result: PASS - TypeScript completed with `tsc --noEmit`.
  * Evidence: No type errors.
* UI product-surface check: N/A - Validation command task only; no user-facing route changed.
* UI craft check: N/A - Validation command task only; no UI changed.

***

### Task T020 - Validate ASCII and LF requirements

**Started**: 2026-06-30 19:45 **Completed**: 2026-06-30 19:48 **Duration**: 3 minutes

**Notes**:

* Ran Prettier on the touched runtime files and session artifacts before final encoding validation.
* Re-ran the focused runtime gate and `bun run typecheck` after formatting rewrote `run-factory.ts`, `audio.test.ts`, and session markdown.
* Fixed one non-ASCII em dash in a touched protocol test comment so touched runtime files satisfy the session ASCII requirement.
* Validated ASCII-only content and LF line endings across changed runtime files, `.spec_system/state.json`, and the session artifact files.

**Files Changed**:

* `src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts` - Replaced a non-ASCII em dash in a touched comment with an ASCII hyphen.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/spec.md` - Prettier formatting only.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/tasks.md` - Marked T020 and completion checklist complete.
* `.spec_system/specs/phase39-session02-depth-resolver-migration/implementation-notes.md` - Added T020 evidence and final progress.

**Verification**:

* Command/check: `bunx prettier --write [touched runtime files and session artifacts]`
  * Result: PASS - Prettier completed; `run-factory.ts`, `audio.test.ts`, and session markdown were formatted.
  * Evidence: Prettier reported all listed files processed successfully.
* Command/check: `bunx vitest run src/extensions/ai-rogue/runtime/__tests__/depth-resolver.test.ts src/extensions/ai-rogue/runtime/__tests__/world.test.ts src/extensions/ai-rogue/runtime/__tests__/simulation.test.ts src/extensions/ai-rogue/runtime/__tests__/floor-arc.test.ts src/extensions/ai-rogue/runtime/__tests__/themes.test.ts src/extensions/ai-rogue/runtime/__tests__/prefabs.test.ts src/extensions/ai-rogue/runtime/__tests__/protocols.test.ts src/extensions/ai-rogue/runtime/__tests__/terminals.test.ts src/extensions/ai-rogue/runtime/__tests__/audio.test.ts`
  * Result: PASS - 9 test files passed, 93 tests passed.
  * Evidence: Focused runtime gate passed after formatting.
* Command/check: `bun run typecheck`
  * Result: PASS - TypeScript completed with `tsc --noEmit`.
  * Evidence: Typecheck passed after formatting.
* Command/check: `perl` ASCII scan plus CRLF scan over changed runtime files, `.spec_system/state.json`, and session artifacts
  * Result: PASS - 25 files checked.
  * Evidence: `ASCII: pass` and `LF: pass`.
* UI product-surface check: N/A - Encoding and formatting validation only; no user-facing route changed.
* UI craft check: N/A - Encoding and formatting validation only; no UI changed.

***


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