> 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/phase22-session01-antigravity-detection-data-contract/implementation-notes.md). # Implementation Notes **Session ID**: `phase22-session01-antigravity-detection-data-contract` **Started**: 2026-06-02 16:56 **Last Updated**: 2026-06-02 17:18 *** ## Session Progress | Metric | Value | | ------------------- | ------- | | Tasks Completed | 22 / 22 | | Estimated Remaining | 0 hours | | Blockers | 0 | *** ### Validation Re-check **Started**: 2026-06-02 17:16 **Completed**: 2026-06-02 17:18 **Duration**: 2 minutes **Notes**: * Reran the full test suite after the initial validate pass exposed an outdated nested-validation expectation for the new `detection.apps.antigravity` default shape. * Updated `src/lib/__tests__/nested-validation.test.ts` to assert the additive Antigravity contract instead of the pre-session shape. * Final result after the fix: `bun run test` passed with 222 test files and 2945 tests passing. **Files Changed**: * `src/lib/__tests__/nested-validation.test.ts` - Adjusted detection expectations to include additive Antigravity defaults during validation. **BQC Fixes**: * Contract alignment: Validation tests now reflect the additive nested Antigravity contract that the session introduced. ## Task Log ### 2026-06-02 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Directory structure ready * [x] Bun 1.3.14 available * [x] Local Vitest 4.1.6 binary available through `node_modules/.bin` * [x] Local TypeScript 6.0.3 binary available through `node_modules/.bin` **Notes**: * `.spec_system/scripts/check-prereqs.sh --json --env` passed. * The optional global tool check reported `vitest` and `tsc` as missing because the repo uses local package binaries through Bun scripts. Local binaries are present and match the versions required by the session. *** ### Task T001 - Verify prerequisites and reference paths **Started**: 2026-06-02 16:54 **Completed**: 2026-06-02 16:56 **Duration**: 2 minutes **Notes**: * Confirmed the active session depends on completed Phase 21 sessions. * Confirmed current AI OS Antigravity detection is a single `.app` boolean in `scripts/lib/app-detection.ts`. * Confirmed the v2.3 reference block in `/home/aiwithapex/projects/claudeos/claude-os-v2.3/scripts/aggregate.ts` defines `surfaces`, `usage`, conversation counts, and saved-equivalent data. **Files Changed**: * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T001 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged setup verification. *** ### Task T002 - Inspect Antigravity fallback shape **Started**: 2026-06-02 16:56 **Completed**: 2026-06-02 16:56 **Duration**: 1 minute **Notes**: * Confirmed `src/data/live-data.example.json` currently has only `antigravity.detected: false`. * Confirmed both populated and empty browser fixtures in `tests/e2e/fixtures/live-data.ts` currently have only `antigravity.detected: false`. **Files Changed**: * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T002 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged fallback-shape inspection. *** ### Task T003 - Confirm focused test command targets **Started**: 2026-06-02 16:56 **Completed**: 2026-06-02 16:56 **Duration**: 1 minute **Notes**: * Confirmed focused detector target: `bun run test -- scripts/lib/__tests__/app-detection.test.ts`. * Confirmed focused validator targets: `bun run test -- src/lib/__tests__/validate-live-data.test.ts src/lib/__tests__/antigravity-live-data.test.ts`. * Confirmed contract checks: `bun run typecheck:scripts` and `bun run typecheck`. **Files Changed**: * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T003 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged focused command targets. *** ### Task T004 - Extend script-side AppDetection contract **Started**: 2026-06-02 16:58 **Completed**: 2026-06-02 16:59 **Duration**: 1 minute **Notes**: * Added reusable `AppDetectionSurface` and `AppDetectionUsage` interfaces. * Added optional `usage` and `surfaces` fields to `AppDetection`, preserving existing top-level fields. **Files Changed**: * `scripts/lib/app-detection.ts` - Added additive Antigravity-compatible detection sub-shapes. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T004 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged script contract update. **BQC Fixes**: * Contract alignment: Kept the existing `detected`, `path`, `configPath`, `version`, and `variants` fields unchanged so current consumers remain compatible. *** ### Task T005 - Define client-side Antigravity types **Started**: 2026-06-02 16:59 **Completed**: 2026-06-02 16:59 **Duration**: 1 minute **Notes**: * Added `AntigravityAppSurface`, `AntigravityAppUsage`, and `AntigravityDetectedApp`. * Updated `DetectionApps.antigravity` to use the nested Antigravity type while keeping it compatible with `DetectedApp`. **Files Changed**: * `src/lib/live-data-types.ts` - Added Antigravity browser contract types. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T005 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged client type update. **BQC Fixes**: * Contract alignment: Mirrored the script-side contract exactly so scanner output, validation, and browser consumers share the same field names. *** ### Task T006 - Add Antigravity validator defaults **Started**: 2026-06-02 16:59 **Completed**: 2026-06-02 17:01 **Duration**: 2 minutes **Notes**: * Added default `surfaces.ide`, `surfaces.cli`, and `usage` values to `DEFAULT_LIVE_DATA`. * Added focused Antigravity validation helpers for surfaces, usage, compatibility path, config path, version, name, and variants. * Mapped malformed, missing, negative, unbounded, credential-shaped, conversation-path, and raw-home-path inputs to safe defaults or omitted fields. **Files Changed**: * `src/lib/validate-live-data.ts` - Added Antigravity default shape and normalizer. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T006 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged validator default work. **BQC Fixes**: * Trust boundary enforcement: Browser-visible Antigravity data now passes through explicit type checks and narrow string guards. * Error information boundaries: Conversation filenames, conversation directories, raw user home paths, and credential-shaped strings are dropped. * Failure path completeness: Missing or malformed Antigravity nested objects normalize to safe defaults instead of throwing. *** ### Task T007 - Add app-detection Antigravity fixtures **Started**: 2026-06-02 17:01 **Completed**: 2026-06-02 17:02 **Duration**: 1 minute **Notes**: * Added focused cases for absent, IDE-only, CLI-only, both-surface, conversation, unreadable-stat, and sanitizer/privacy scenarios. * Test fixtures assert conversation filenames and conversation directories are not serialized into browser-visible detection output. **Files Changed**: * `scripts/lib/__tests__/app-detection.test.ts` - Added Antigravity detector fixture coverage. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T007 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged detector test fixture work. **BQC Fixes**: * Failure path completeness: Added unreadable stat coverage for partial conversation scans. * Error information boundaries: Added assertions that raw conversation filenames and directories are not emitted. *** ### Task T008 - Add live-data validator Antigravity fixtures **Started**: 2026-06-02 17:02 **Completed**: 2026-06-02 17:03 **Duration**: 1 minute **Notes**: * Added validator coverage for default Antigravity shape, older absent nested payloads, valid nested payloads, and malformed unsafe payloads. * Tests assert unsafe path and credential-looking fields are removed while booleans and bounded numeric defaults are preserved. **Files Changed**: * `src/lib/__tests__/validate-live-data.test.ts` - Added Antigravity validator fixture cases. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T008 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged validator fixture work. **BQC Fixes**: * Trust boundary enforcement: Added malformed payload cases crossing the live-data browser boundary. * Error information boundaries: Added assertions that raw local paths and credential-shaped strings do not survive validation. *** ### Task T009 - Create focused Antigravity live-data contract tests **Started**: 2026-06-02 17:03 **Completed**: 2026-06-02 17:04 **Duration**: 1 minute **Notes**: * Added a dedicated test file for Antigravity nested detection and usage normalization. * Covered surface-derived detection, CLI-only compatibility path fallback, bounded usage values, unsafe conversation path rejection, and malformed nested usage defaults. **Files Changed**: * `src/lib/__tests__/antigravity-live-data.test.ts` - Added focused Antigravity live-data contract tests. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T009 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged focused contract test creation. **BQC Fixes**: * Contract alignment: Added isolated tests for script/browser field names and default shapes. * Failure path completeness: Added malformed nested object coverage to ensure validation does not throw. *** ### Task T010 - Implement Antigravity IDE surface detection **Started**: 2026-06-02 17:04 **Completed**: 2026-06-02 17:04 **Duration**: 1 minute **Notes**: * Added `detectAntigravityIdeSurface()` using the existing `findMacApp("Antigravity")` helper. * Wired `detectApps()` to emit `surfaces.ide` with sanitized path data and top-level compatibility fields. **Files Changed**: * `scripts/lib/app-detection.ts` - Added Antigravity IDE surface detection. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T010 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged IDE detection implementation. **BQC Fixes**: * Trust boundary enforcement: IDE path output continues through the existing sanitizer before browser emission. * Contract alignment: Top-level `detected` and `path` remain present for existing consumers. *** ### Task T011 - Implement Antigravity CLI surface detection **Started**: 2026-06-02 17:04 **Completed**: 2026-06-02 17:05 **Duration**: 1 minute **Notes**: * Added `detectAntigravityCliSurface()` using `resolveCliPath("antigravity")`. * Added `~/.gemini/bin` as an Antigravity-specific extra directory while retaining the existing resolver's common PATH and local-bin directories. * The detector does not execute Antigravity; it only checks executable presence through the existing resolver. **Files Changed**: * `scripts/lib/app-detection.ts` - Added Antigravity CLI surface detection and compatibility path fallback. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T011 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged CLI detection implementation. **BQC Fixes**: * Failure path completeness: CLI helper failures return `{ detected: false }` without throwing. * External dependency resilience: Detection avoids launching the CLI; no unbounded shell probe is introduced. *** ### Task T012 - Implement bounded Antigravity conversation counting **Started**: 2026-06-02 17:05 **Completed**: 2026-06-02 17:05 **Duration**: 1 minute **Notes**: * Added a read-only conversation directory scanner for `~/.gemini/antigravity/conversations`. * Count scanning filters only `.pb` and `.json` names, sorts deterministically, and caps at 1000 entries. * Missing or unreadable conversation directories return no usage block instead of throwing. **Files Changed**: * `scripts/lib/app-detection.ts` - Added bounded Antigravity conversation count scanning. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T012 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged conversation count implementation. **BQC Fixes**: * Resource cleanup: The scanner uses synchronous directory/stat APIs only and does not retain handles, watchers, timers, or subscriptions. * Trust boundary enforcement: Conversation scanning uses extension and mtime metadata only; contents are never read. * Failure path completeness: Directory access failures are caught and degrade to absent usage. *** ### Task T013 - Implement Antigravity last-active metadata **Started**: 2026-06-02 17:05 **Completed**: 2026-06-02 17:06 **Duration**: 1 minute **Notes**: * Added per-file stat mtime aggregation across the bounded conversation candidate list. * Added `lastActiveMs` and `lastActiveAgo` without emitting raw filenames or the conversation directory. * Individual stat failures are ignored while preserving the valid aggregate. **Files Changed**: * `scripts/lib/app-detection.ts` - Added Antigravity last-active mtime metadata. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T013 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged last-active implementation. **BQC Fixes**: * Failure path completeness: Per-file stat failures no longer fail the whole usage scan. * Error information boundaries: Last-active output contains only numeric timestamp and relative age text, not filenames or directories. *** ### Task T014 - Implement Antigravity saved-equivalent emission **Started**: 2026-06-02 17:06 **Completed**: 2026-06-02 17:07 **Duration**: 1 minute **Notes**: * Added `calculateAntigravitySavedEquivalent()` with finite-number guards. * Emits `usage.savedEquivalent` from bounded conversation count and caps browser-visible value at 5000. **Files Changed**: * `scripts/lib/app-detection.ts` - Added bounded Antigravity saved-equivalent calculation. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T014 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged saved-equivalent implementation. **BQC Fixes**: * Failure path completeness: Invalid or negative count input maps to 0. * Contract alignment: `usage.savedEquivalent` is always finite when usage is emitted. *** ### Task T015 - Wire composed Antigravity detection object **Started**: 2026-06-02 17:07 **Completed**: 2026-06-02 17:07 **Duration**: 1 minute **Notes**: * Added `composeAntigravityDetection()` to centralize top-level `detected`, compatibility `path`, nested `surfaces`, and optional `usage` composition. * Missing IDE, CLI, or usage inputs now degrade through one explicit object builder. **Files Changed**: * `scripts/lib/app-detection.ts` - Added Antigravity detection composition helper and wired `detectApps()` through it. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T015 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged composition work. **BQC Fixes**: * Contract alignment: One composition path now controls compatibility and nested Antigravity fields. * State freshness on re-entry: Each `detectApps()` call rebuilds surfaces and usage from fresh filesystem probes. *** ### Task T016 - Update live-data Antigravity validation **Started**: 2026-06-02 17:00 **Completed**: 2026-06-02 17:08 **Duration**: 8 minutes **Notes**: * Confirmed the Antigravity validator path normalizes nested `surfaces` and `usage` objects. * Preserves additive defaults for absent legacy payloads. * Drops unsafe strings including credential-shaped values, conversation paths, conversation filenames, and raw non-operator home paths. **Files Changed**: * `src/lib/validate-live-data.ts` - Added Antigravity-specific browser contract validation. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T016 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged validator implementation completion. **BQC Fixes**: * Trust boundary enforcement: The live-data browser boundary now validates all Antigravity nested fields. * Error information boundaries: Unsafe local path and credential-shaped strings are omitted from browser output. * Contract alignment: Defaults match `DEFAULT_LIVE_DATA` and the focused Antigravity tests. *** ### Task T017 - Update committed fallback example data **Started**: 2026-06-02 17:08 **Completed**: 2026-06-02 17:08 **Duration**: 1 minute **Notes**: * Updated `src/data/live-data.example.json` with safe absent `surfaces` and `usage` defaults for Antigravity. * Did not update private generated `src/data/live-data.json`. **Files Changed**: * `src/data/live-data.example.json` - Added Antigravity nested fallback shape. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T017 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged fallback data update. **BQC Fixes**: * Contract alignment: Example data now matches validator defaults and client types. * Error information boundaries: Example data contains no private local paths or conversation filenames. *** ### Task T018 - Update browser-test live-data fixtures **Started**: 2026-06-02 17:08 **Completed**: 2026-06-02 17:09 **Duration**: 1 minute **Notes**: * Updated populated and empty e2e live-data fixtures with safe absent Antigravity `surfaces` and `usage` defaults. * Confirmed fixture values contain no private local paths or conversation filenames. **Files Changed**: * `tests/e2e/fixtures/live-data.ts` - Added Antigravity nested fixture shape in both live-data objects. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T018 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged e2e fixture update. **BQC Fixes**: * Contract alignment: Browser-test fixtures now match committed fallback data and validator defaults. * Error information boundaries: Fixture data exposes only safe absent-state metadata. *** ### Task T019 - Run focused script detection tests **Started**: 2026-06-02 17:09 **Completed**: 2026-06-02 17:10 **Duration**: 1 minute **Notes**: * Ran `bun run test -- scripts/lib/__tests__/app-detection.test.ts`. * Initial run exposed a missing `humanAgo` export in the test mock and one over-broad privacy assertion. * Fixed the mock and narrowed the assertion to raw conversation directory leakage. * Final result: 45 tests passed. **Files Changed**: * `scripts/lib/__tests__/app-detection.test.ts` - Fixed Antigravity test mock and privacy assertion. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T019 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged detector test run. **BQC Fixes**: * Contract alignment: Test mocks now reflect the scanner helper API used by production code. * Error information boundaries: Privacy assertion now targets raw conversation path leakage without blocking the safe `usage.conversations` count field. *** ### Task T020 - Run focused live-data validation tests **Started**: 2026-06-02 17:10 **Completed**: 2026-06-02 17:11 **Duration**: 1 minute **Notes**: * Ran `bun run test -- src/lib/__tests__/validate-live-data.test.ts src/lib/__tests__/antigravity-live-data.test.ts`. * Initial run exposed one over-broad privacy assertion in the focused Antigravity contract test. * Fixed the assertion to target raw `.gemini/antigravity/conversations` path leakage while preserving the safe `usage.conversations` count field. * Final result: 48 tests passed across 2 files. **Files Changed**: * `src/lib/__tests__/antigravity-live-data.test.ts` - Narrowed privacy assertion to raw conversation path leakage. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T020 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged validator test run. **BQC Fixes**: * Error information boundaries: Validator tests now distinguish safe aggregate count fields from unsafe raw path leakage. *** ### Task T021 - Run script and app type checks **Started**: 2026-06-02 17:11 **Completed**: 2026-06-02 17:12 **Duration**: 1 minute **Notes**: * Ran `bun run typecheck:scripts` and `bun run typecheck`. * Initial typecheck found that the `DetectionApps` index signature needed to explicitly include `AntigravityDetectedApp`. * Initial app typecheck also found an existing setup helper cast needed to pass through `unknown` because setup uses a narrower terminal fixture shape. * Final result: both type checks passed. **Files Changed**: * `src/lib/live-data-types.ts` - Broadened `DetectionApps` index signature for the Antigravity subtype. * `src/components/setup/detection-helpers.ts` - Made setup detection cast explicit through `unknown`. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T021 complete and updated progress. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged typecheck run. **BQC Fixes**: * Contract alignment: Type-level index signatures now match the additive Antigravity app contract. * Failure path completeness: Setup hydration keeps its explicit null fallback while avoiding an unsafe direct type assertion. *** ### Task T022 - Validate ASCII, privacy boundaries, and session artifacts **Started**: 2026-06-02 17:12 **Completed**: 2026-06-02 17:13 **Duration**: 1 minute **Notes**: * Confirmed touched files are ASCII-only. * Confirmed no CRLF line endings in touched files. * Confirmed `git diff --check` is clean for touched files. * Confirmed `src/data/live-data.example.json` parses and contains the safe Antigravity fallback shape. * Confirmed committed fallback/fixture Antigravity output contains no raw local paths, conversation filenames, credential-shaped strings, or raw conversation directories. **Files Changed**: * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/tasks.md` - Marked T022 complete and updated the completion checklist. * `.spec_system/specs/phase22-session01-antigravity-detection-data-contract/implementation-notes.md` - Logged final validation. **BQC Fixes**: * Error information boundaries: Final privacy scan confirmed committed output shapes expose only safe Antigravity metadata. * Contract alignment: Session artifacts now report 22 of 22 tasks complete and ready for validate. *** --- # Agent Instructions This documentation is published with GitBook. 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