> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase22-session03-legion-enemy-reducer/implementation-notes.md). # Implementation Notes **Session ID**: `phase22-session03-legion-enemy-reducer` **Package**: apps/web **Started**: 2026-07-05 01:20 **Last Updated**: 2026-07-05 01:35 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 20 / 20 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ## Task Log ### 2026-07-05 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify Session 02 validation evidence and dependency scope **Started**: 2026-07-05 01:20 **Completed**: 2026-07-05 01:20 **Duration**: 1 minute **Notes**: * Confirmed Session 02 validation passed and established the reducer dependency baseline. * Confirmed package scope remains `apps/web` and this session has no UI, DB, or hosted-service dependency. **Files Changed**: * `.spec_system/specs/phase22-session03-legion-enemy-reducer/implementation-notes.md` - initialized session evidence log. **Verification**: * Command/check: `sed -n '1,220p' .spec_system/specs/phase22-session02-hero-attention-reducer/validation.md` * Result: PASS - validation report shows `Result: PASS`, 21/21 tasks complete, focused reducer tests passing, web typecheck passing, and UI product surface N/A. * Evidence: Prior session validated reducer, tests, typecheck, ASCII/LF, conventions, security, and BQC gates. * UI product-surface check: N/A - setup evidence task only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T002 - Review current projection reducer, Legion shape, attention finalization, and parser guards **Started**: 2026-07-05 01:20 **Completed**: 2026-07-05 01:21 **Duration**: 1 minute **Notes**: * Confirmed `GameProjectionLegion` already owns camps, skirmishers, ram, gremlins, wraiths, and siege. * Confirmed parser guards validate the existing nested Legion shape and `recomputeAlertFocus` already ranks `flare > gate > siege > ram > skirmisher > newCamp > null`. **Files Changed**: * `.spec_system/specs/phase22-session03-legion-enemy-reducer/implementation-notes.md` - recorded reducer-read evidence. **Verification**: * Command/check: `sed -n '1,1320p' apps/web/src/lib/gameProjection.ts` * Result: PASS - inspected neutral constructors, parser guards, focus derivation, finalization path, and current reducer switch. * Evidence: Enemy event cases are not implemented yet; reducer currently handles hero lifecycle, flares, gates, and persistence helpers. * UI product-surface check: N/A - reducer inspection only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T003 - Review protocol event shapes for dev-health, stalled-task, and tool-result enemy inputs **Started**: 2026-07-05 01:21 **Completed**: 2026-07-05 01:22 **Duration**: 1 minute **Notes**: * Confirmed dev-health event fields for `ts_errors`, `lint_error`, `test_failure`, and `build_error`/`build_fix`. * Confirmed stalled-task and tool-result inputs are sufficient for stable refs while excluding raw messages and previews from projection state. **Files Changed**: * `.spec_system/specs/phase22-session03-legion-enemy-reducer/implementation-notes.md` - recorded protocol-read evidence. **Verification**: * Command/check: `sed -n '320,360p' packages/protocol/src/events.ts && sed -n '560,620p' packages/protocol/src/events.ts` * Result: PASS - inspected `TaskStalledEvent`, `TsErrorsEvent`, `LintErrorEvent`, `TestFailureEvent`, `BuildErrorEvent`, and `ToolResultEvent` fields. * Evidence: No protocol edit is required; reducer can use existing discriminants and ignore sensitive detail fields where scoped. * UI product-surface check: N/A - protocol inspection only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T004 - Add bounded enemy ref constants and helpers **Started**: 2026-07-05 01:22 **Completed**: 2026-07-05 01:25 **Duration**: 3 minutes **Notes**: * Added bounded enemy ref, gremlin, siege, and wraith caps plus path/detail/task normalization helpers. * Added deterministic path scoping and hash-backed build detail refs so raw diagnostics are not stored. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added bounded constants, normalization helpers, count clamps, sorted record helper, and no-op comparison helpers. **Verification**: * Command/check: `rg -n "MAX_ENEMY|normalizeEnemy|withLegion|TASK_PRESSURE_LEVELS|reduce(TestFailure|BuildSignal|TsErrors|LintError|TaskPressure|ToolResult)" apps/web/src/lib/gameProjection.ts` * Result: PASS - helper constants and normalization/comparison helpers are present in the pure reducer module. * Evidence: Bounded refs use length caps, deterministic path scoping, build-detail hashing, gremlin caps, siege task caps, and wraith stack cap 3. * Command/check: `npm exec -- biome check apps/web/src/lib/gameProjection.ts` * Result: PASS - Biome checked the edited reducer file with no fixes. * Evidence: Formatter/linter pass after mechanical formatting. * UI product-surface check: N/A - pure reducer helper work only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T005 - Add immutable Legion update helpers **Started**: 2026-07-05 01:25 **Completed**: 2026-07-05 01:26 **Duration**: 1 minute **Notes**: * Added copy-on-write helpers for skirmisher, ram, gremlin, siege, and wraith Legion branches. * Preserved same-reference returns for unchanged records and capped stack/count states. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added `withLegion*` helpers and branch equality helpers. **Verification**: * Command/check: `rg -n "withLegion(Skirmisher|Ram|TsErrors|LintPressure|SiegePressure|WraithStack)|are(Skirmishers|Rams|Gremlins|Wraiths|Sieges)Equal" apps/web/src/lib/gameProjection.ts` * Result: PASS - immutable branch helpers and equality checks are present for all scoped Legion branches. * Evidence: Helpers clone only changed nested records and return the original Legion object for unchanged aggregate values. * Command/check: `npm --workspace @factionos/web run typecheck` * Result: PASS - web TypeScript project typechecked after reducer helper additions. * Evidence: `tsc -b --noEmit` exited 0. * UI product-surface check: N/A - pure reducer helper work only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T006 - Add siege severity mapping for task pressure events **Started**: 2026-07-05 01:26 **Completed**: 2026-07-05 01:27 **Duration**: 1 minute **Notes**: * Added deterministic task-pressure levels: near stall 1, stalled 2, escalation 3. * Added bounded sorted unique stalled-task ref reconciliation for the single siege aggregate. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added task pressure type mapping and `withLegionSiegePressure`. **Verification**: * Command/check: `rg -n "TASK_PRESSURE_LEVELS|withLegionSiegePressure|reduceTaskPressure" apps/web/src/lib/gameProjection.ts` * Result: PASS - severity mapping, bounded sorted task refs, and reducer path are present. * Evidence: Siege task refs are deduped, sorted, capped, and promoted by max severity. * Command/check: `npm --workspace @factionos/web run typecheck` * Result: PASS - web TypeScript project typechecked after siege mapping. * Evidence: `tsc -b --noEmit` exited 0. * UI product-surface check: N/A - pure reducer work only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T007 - Add typed Vitest event builders for enemy reducer inputs **Started**: 2026-07-05 01:27 **Completed**: 2026-07-05 01:30 **Duration**: 3 minutes **Notes**: * Added typed builders for dev-health, task pressure, and tool-result events. * Added sensitive fixture strings for failure messages, build details, absolute paths, and tool previews so privacy assertions can target real leak risks. **Files Changed**: * `apps/web/tests/gameProjection.test.ts` - added event type aliases, sensitive fixture constants, and builder helpers. **Verification**: * Command/check: `npm exec -- biome check apps/web/tests/gameProjection.test.ts` * Result: PASS - test file passed Biome after mechanical formatting. * Evidence: Biome checked the edited test file with no fixes. * Command/check: `npm --workspace @factionos/web run typecheck` * Result: PASS - builder aliases align with protocol event union types. * Evidence: `tsc -b --noEmit` exited 0. * UI product-surface check: N/A - test fixture work only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T008 - Implement `test_failure` skirmisher folding **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added `test_failure` folding into bounded normalized skirmisher refs without storing messages or broad absolute paths. * Duplicate path signals return the original projection reference. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added skirmisher reducer case and helper use. * `apps/web/tests/gameProjection.test.ts` - added focused skirmisher upsert, duplicate no-op, focus, and privacy assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Dev-health test covers skirmisher creation, duplicate no-op, focus promotion, message exclusion, and broad absolute path exclusion. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T009 - Implement `build_error` and `build_fix` ram folding **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added singleton ram upsert with hash-backed bounded detail refs and explicit `build_fix` clearing. * Same-detail build errors and redundant fixes return the original state reference. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added build signal reducer. * `apps/web/tests/gameProjection.test.ts` - added ram upsert, clear, focus promotion, duplicate no-op, and raw detail exclusion assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Dev-health and focus tests cover ram creation, clear-to-skirmisher, clear-to-camp, clear-to-null, and raw build-detail exclusion. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T010 - Implement `ts_errors` gremlin reconciliation **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added current-count reconciliation for TypeScript error and file counts with bounded non-negative integers. * Zero-count events clear the TypeScript gremlin pressure and unchanged snapshots no-op. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added `ts_errors` reducer. * `apps/web/tests/gameProjection.test.ts` - added count, zero-clear, and duplicate no-op assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Dev-health test verifies `tsErrors`, `tsFiles`, unchanged duplicate, and zero clearing. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T011 - Implement `lint_error` gremlin pressure folding **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added bounded lint pressure accumulation with replay no-op behavior and no storage of lint messages or paths. * Capped lint pressure returns the original state reference. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added `lint_error` reducer and cap handling. * `apps/web/tests/gameProjection.test.ts` - added lint accumulation, replay no-op, cap, and privacy assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Dev-health test verifies lint count increments to cap 25, replay does not accumulate, capped signal no-ops, and raw messages/absolute paths are excluded. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T012 - Implement stalled-task siege folding **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added `task_near_stall`, `task_stalled`, and `task_escalation` folding into a single bounded siege aggregate. * Task refs are stable, sorted, unique, and severity promotes by max level. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added task pressure reducer. * `apps/web/tests/gameProjection.test.ts` - added siege reconciliation, sorted refs, duplicate no-op, severity promotion, and privacy assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Siege test verifies levels 1/2/3, sorted refs, duplicate no-op, focus, and exclusion of task detail text. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T013 - Implement failed `tool_result` wraith folding **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Added failed tool-result folding into capped per-hero wraith stacks with neutral hero projection creation. * Successful results, replay results, and capped stacks no-op without storing previews, mission ids, or tool ids. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - added tool-result reducer. * `apps/web/tests/gameProjection.test.ts` - added hero creation, cap, success no-op, replay no-op, and preview exclusion assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Wraith test verifies stack 1 to 3, cap no-op, neutral hero creation, successful-result no-op, replay no-op, and preview/mission/tool exclusion. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T014 - Audit enemy reducer finalization and focus priority **Started**: 2026-07-05 01:30 **Completed**: 2026-07-05 01:31 **Duration**: 1 minute **Notes**: * Confirmed all enemy mutation paths call `finalizeProjectionUpdate` and do not manually maintain `alertFocus`. * Existing priority remains `flare > gate > siege > ram > skirmisher > newCamp > null`. **Files Changed**: * `apps/web/src/lib/gameProjection.ts` - enemy reducers route through existing finalization. * `apps/web/tests/gameProjection.test.ts` - added enemy focus promotion and demotion assertions. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Focus tests verify siege, ram, skirmisher, new camp, null, and flare/gate priority over siege. * Command/check: `npm --workspace @factionos/web run typecheck` * Result: PASS - web TypeScript project typechecked after all reducer changes. * Evidence: `tsc -b --noEmit` exited 0. * UI product-surface check: N/A - pure reducer and tests only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T015 - Add dev-health enemy tests **Started**: 2026-07-05 01:31 **Completed**: 2026-07-05 01:32 **Duration**: 1 minute **Notes**: * Added dev-health assertions for skirmisher, ram, TypeScript gremlin, and lint gremlin behavior. * Covered duplicate no-ops, clear behavior, caps, replay no-accumulation, and raw message/detail/path exclusions. **Files Changed**: * `apps/web/tests/gameProjection.test.ts` - added dev-health reducer test coverage. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Test `folds dev-health enemy signals with bounded refs, clears, and privacy exclusions` passed. * UI product-surface check: N/A - test-only task; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T016 - Add siege reconciliation and priority tests **Started**: 2026-07-05 01:31 **Completed**: 2026-07-05 01:32 **Duration**: 1 minute **Notes**: * Added siege assertions for sorted refs, unique duplicate handling, severity promotion, and focus under flare/gate refs. **Files Changed**: * `apps/web/tests/gameProjection.test.ts` - added task-pressure siege test coverage. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Test `reconciles siege pressure with sorted refs, severity promotion, and lower focus priority` passed. * UI product-surface check: N/A - test-only task; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T017 - Add failed-tool wraith tests **Started**: 2026-07-05 01:31 **Completed**: 2026-07-05 01:32 **Duration**: 1 minute **Notes**: * Added failed-tool assertions for neutral hero creation, stack cap 3, success no-op, replay no-op, and preview/mission/tool exclusion. **Files Changed**: * `apps/web/tests/gameProjection.test.ts` - added wraith reducer test coverage. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Test `folds failed tool results into capped wraith stacks without storing previews` passed. * UI product-surface check: N/A - test-only task; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T018 - Add enemy alert-focus promotion tests **Started**: 2026-07-05 01:31 **Completed**: 2026-07-05 01:32 **Duration**: 1 minute **Notes**: * Added focus assertions covering siege, ram, skirmisher, new camp, and null after higher-priority ram clears. * Existing gate/flare assertions continue to prove attention priority above Legion focus. **Files Changed**: * `apps/web/tests/gameProjection.test.ts` - added enemy focus promotion and demotion coverage. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 file passed, 20 tests passed. * Evidence: Test `promotes enemy alert focus through siege, ram, skirmisher, new camp, and null` passed. * UI product-surface check: N/A - test-only task; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T019 - Run focused reducer test command and fix any failures **Started**: 2026-07-05 01:32 **Completed**: 2026-07-05 01:33 **Duration**: 1 minute **Notes**: * Ran the specified focused reducer test command after formatting and implementation cleanup. * No test failures remained. **Files Changed**: * `.spec_system/specs/phase22-session03-legion-enemy-reducer/implementation-notes.md` - recorded focused test evidence. **Verification**: * Command/check: `npm test -- apps/web/tests/gameProjection.test.ts` * Result: PASS - 1 test file passed; 20 tests passed; 0 failed. * Evidence: Vitest completed successfully in the web project environment. * UI product-surface check: N/A - verification task only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. ### Task T020 - Run web typecheck and ASCII/LF validation **Started**: 2026-07-05 01:33 **Completed**: 2026-07-05 01:34 **Duration**: 1 minute **Notes**: * Ran the web typecheck and changed-file quality checks. * Confirmed changed code and session artifacts are ASCII text with LF endings. **Files Changed**: * `.spec_system/specs/phase22-session03-legion-enemy-reducer/implementation-notes.md` - recorded final verification evidence. **Verification**: * Command/check: `npm --workspace @factionos/web run typecheck` * Result: PASS - web TypeScript project passed. * Evidence: `tsc -b --noEmit` exited 0. * Command/check: `npm exec -- biome check apps/web/src/lib/gameProjection.ts apps/web/tests/gameProjection.test.ts` * Result: PASS - Biome checked 2 files with no fixes. * Evidence: Changed reducer and tests match formatter/linter expectations. * Command/check: `LC_ALL=C grep -nP '[^\x00-\x7F]' ...; rg -nU $'\r' ...; file ...` * Result: PASS - no non-ASCII bytes or CRLF endings found. * Evidence: `file` reports ASCII text for changed code and session artifacts. * UI product-surface check: N/A - verification task only; no user-facing surface changed. * UI craft check: N/A - no UI files or rendered surfaces changed. *** ## Session Closeout **Completed**: 2026-07-05 01:34 **BQC**: Applied to pure reducer and parser paths; relevant trust-boundary and contract-alignment checks passed through bounded normalization, raw-payload exclusion tests, replay no-accumulation tests, parser guard hardening, and typecheck. **Blockers**: None **BQC Fixes**: * Trust boundary enforcement: tightened persisted Legion parser guards for skirmisher paths, ram detail refs, gremlin caps, wraith caps, and sorted bounded siege refs (`apps/web/src/lib/gameProjection.ts`). * Contract alignment: extended parser tests so unsafe raw enemy payloads fall back to a fresh projection (`apps/web/tests/gameProjection.test.ts`). **Final Verification**: * `npm test -- apps/web/tests/gameProjection.test.ts` - PASS, 20 tests passed. * `npm --workspace @factionos/web run typecheck` - PASS. * `npm exec -- biome check apps/web/src/lib/gameProjection.ts apps/web/tests/gameProjection.test.ts` - PASS. * ASCII/LF scan for changed code and session artifacts - PASS. *** --- # Agent Instructions This documentation is published with GitBook. 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