> 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-session02-antigravity-usage-consumers/implementation-notes.md). # Implementation Notes **Session ID**: `phase22-session02-antigravity-usage-consumers` **Started**: 2026-06-02 17:33 **Last Updated**: 2026-06-02 17:45 *** ## Session Progress | Metric | Value | | ------------------- | --------- | | Tasks Completed | 18 / 18 | | Estimated Remaining | 0 minutes | | Blockers | 0 | *** ## Task Log ### 2026-06-02 - Session Start **Environment verified**: * [x] Prerequisites confirmed * [x] Tools available * [x] Directory structure ready *** ### Task T001 - Verify Session 01 prerequisites **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Confirmed Phase 22 Session 01 validation passed with 22/22 tasks complete. * Confirmed prior focused tests, app typecheck, script typecheck, ASCII, privacy, and behavioral quality gates passed. * Verified the validated contract includes safe `detection.apps.antigravity.surfaces` and optional `usage` metadata with browser-safe counts, timestamps, and numeric saved-equivalent values. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T001 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged prerequisite verification. ### Task T002 - Inspect UI and transform boundaries **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Confirmed `UsagePanel` builds all service rows from `LiveData` in `src/components/usage-panel.tsx`. * Confirmed `SubscriptionStrip` currently computes flat spend and ROI locally from `apiEquivalent` and `buildSubscriptionRows(liveData)`. * Confirmed `home-transforms` already owns pure data selectors for home dashboard projections, making it the right place for Antigravity saved-equivalent coercion. * Reviewed existing ADRs; no additional constraints apply beyond keeping route logic static and browser data isolated. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T002 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged boundary inspection. ### Task T003 - Confirm focused test commands **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Confirmed `package.json` maps `bun run test` to `vitest run`. * Confirmed the focused command format can target `src/components/__tests__/usage-panel.test.tsx`, `src/components/home/__tests__/subscription-strip.test.tsx`, and `src/lib/__tests__/home-transforms.test.ts`. * Confirmed `bun run typecheck` is the app typecheck gate and local Bun is `1.3.14`. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T003 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged test command verification. ### Task T004 - Add Antigravity home logo mapping **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added the existing local Antigravity logo asset to the shared home logo map. * Registered the `antigravity` slug so home components can keep using `logoForSlug()` and their existing image error fallback behavior. **Files Changed**: * `src/components/home/logo-map.ts` - Imported and registered `antigravity.png`. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T004 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged logo map update. **BQC Fixes**: * Contract alignment: Kept the logo lookup on the existing `logoForSlug()` contract instead of adding component-local home image parsing. ### Task T005 - Add Antigravity home selectors **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added `AntigravityUsageProjection` for explicit present, surface, usage, conversation, last-active, and saved-equivalent states. * Added `selectAntigravityUsage()` and `selectAntigravitySavedEquivalent()` in `home-transforms`. * Coerced only finite non-negative numeric inputs and treated invalid, missing, negative, and unbounded values as zero or absent. **Files Changed**: * `src/lib/home-transforms.ts` - Added pure Antigravity selector helpers. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T005 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged selector implementation. **BQC Fixes**: * Contract alignment: Centralized nested Antigravity parsing in a pure selector before UI consumption. * Failure path completeness: Missing or malformed nested values now return deterministic absent/zero states. ### Task T006 - Add Antigravity selector tests **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added focused selector tests for default fallback data, missing Antigravity data, positive usage, zero surface-only data, negative values, and unbounded numeric values. * Verified the test expectations cover both the full projection selector and the saved-equivalent selector. **Files Changed**: * `src/lib/__tests__/home-transforms.test.ts` - Added Antigravity selector coverage. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T006 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged selector test additions. **BQC Fixes**: * Contract alignment: Tests lock the selector output shape for present, absent, and invalid data. * Failure path completeness: Tests verify invalid numeric inputs do not produce visible ROI contribution. ### Task T007 - Add subscription-strip ROI test harness **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Created the focused `SubscriptionStrip` test file with happy-dom and Testing Library. * Mocked `usePriceOverrides()` so detected subscription prices remain deterministic. * Added assertions that positive Antigravity saved-equivalent values increase the API-equivalent ROI value while flat monthly spend remains unchanged. * Added zero-value coverage for hiding the Antigravity attribution chip. **Files Changed**: * `src/components/home/__tests__/subscription-strip.test.tsx` - Added focused ROI and attribution tests. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T007 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged subscription-strip test harness. **BQC Fixes**: * Contract alignment: Mocked only the price override hook boundary and left subscription row derivation real. * Failure path completeness: Test coverage verifies zero saved-equivalent values do not render attribution. ### Task T008 - Add usage-panel Antigravity fixtures **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added an Antigravity fixture builder to the usage-panel tests. * Added absent-contract and default-zero assertions to prevent false active rows. * Added surface-only and positive-usage assertions for free local-agent row behavior. * Expanded the all-service regression case to include Claude, ChatGPT, Codex, OpenRouter, and Antigravity together. **Files Changed**: * `src/components/__tests__/usage-panel.test.tsx` - Added Antigravity fixture coverage. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T008 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged usage-panel test additions. **BQC Fixes**: * Contract alignment: Fixtures match the validated `detection.apps.antigravity` nested shape. * Failure path completeness: Tests cover both absent and zero/default data so false positives are caught. ### Task T009 - Extend usage-panel Antigravity service metadata **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added Antigravity to the usage-panel service union. * Added the Antigravity brand color constant. * Added the local Antigravity logo to the existing usage-panel local logo lookup so the current `alt={service.service}` and image-error behavior will apply to the row. **Files Changed**: * `src/components/usage-panel.tsx` - Added Antigravity service metadata and logo mapping. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T009 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged usage-panel metadata update. **BQC Fixes**: * Accessibility and platform compliance: Reused the existing service image `alt` path for the Antigravity logo instead of adding an unlabeled visual. * Contract alignment: Kept logo resolution inside the existing service metadata model. ### Task T010 - Gate Antigravity usage row **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Imported the pure Antigravity selector into `UsagePanel`. * Added the Antigravity service row only when `selectAntigravityUsage(liveData).isPresent` is true. * The row currently includes free local-agent identity plus conversation and last-active metrics; quota and saved-value detail are completed in T011. **Files Changed**: * `src/components/usage-panel.tsx` - Added selector-gated Antigravity row construction. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T010 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged row gating implementation. **BQC Fixes**: * State freshness on re-entry: Row presence is recalculated from current `LiveData` on each memoized build. * Contract alignment: Row gating relies on the shared selector rather than checking nested fields ad hoc in the component. * Failure path completeness: Missing or default-zero Antigravity data now resolves to no row. ### Task T011 - Render Antigravity local metrics **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added no-quota and saved-value metrics to the Antigravity local row. * Kept Antigravity on `localMetrics` with no usage windows, no cap bar, and no paid subscription placeholder. * Added a small saved-equivalent formatter for the usage-panel display. **Files Changed**: * `src/components/usage-panel.tsx` - Added Antigravity quota and saved-value metrics. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T011 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged Antigravity metric rendering. **BQC Fixes**: * Contract alignment: The row communicates local free-agent usage via `localMetrics`, not paid quota windows. * Error information boundaries: Displayed only safe aggregate count, relative last-active text, no-quota label, and numeric saved-equivalent value. ### Task T012 - Add Antigravity ROI contribution **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Imported `selectAntigravitySavedEquivalent()` into the subscription strip. * Added positive selector output to the API-equivalent ROI numerator. * Left flat monthly spend unchanged because it still reduces only billable subscription rows. **Files Changed**: * `src/components/home/subscription-strip.tsx` - Added Antigravity saved-equivalent value to ROI math. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T012 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged ROI contribution implementation. **BQC Fixes**: * Contract alignment: ROI math now consumes the pure selector rather than parsing nested Antigravity data in route code. * Failure path completeness: Invalid or absent Antigravity saved-equivalent values remain zero through the selector. ### Task T013 - Render gated Antigravity ROI attribution **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Added a compact Antigravity attribution chip next to the ROI value. * Gated the chip on `antigravitySavedEquivalent > 0`. * Used the shared `logoForSlug("antigravity")` path with the existing hide-on-image-error behavior. **Files Changed**: * `src/components/home/subscription-strip.tsx` - Added positive-only Antigravity attribution chip. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T013 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged chip rendering implementation. **BQC Fixes**: * Accessibility and platform compliance: The chip has an explicit contribution label and a decorative image hidden from the accessibility tree. * Error information boundaries: The chip exposes only the safe product label and rounded numeric saved-equivalent amount. ### Task T014 - Verify route remains prop-only **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Confirmed `src/routes/index.tsx` continues to mount `UsagePanel` without Antigravity props. * Confirmed Antigravity parsing exists only in `home-transforms`, `SubscriptionStrip`, and `UsagePanel`. * No route-level changes were needed for ROI wiring. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T014 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged route boundary verification. **BQC Fixes**: * Contract alignment: Kept nested Antigravity parsing out of route code. ### Task T015 - Verify additive usage-panel behavior **Started**: 2026-06-02 17:33 **Completed**: 2026-06-02 17:33 **Duration**: 1 minute **Notes**: * Reviewed the `UsagePanel` diff and confirmed the existing Claude, ChatGPT, Codex, and OpenRouter branches were not modified. * Confirmed Antigravity is appended through its own selector-gated branch before the existing OpenRouter branch. * Confirmed local logo mapping change is additive. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T015 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged additive behavior verification. **BQC Fixes**: * Contract alignment: Existing service-row conditions remain unchanged while the new row is additive. ### Task T016 - Run focused usage-panel tests **Started**: 2026-06-02 17:44 **Completed**: 2026-06-02 17:44 **Duration**: 1 minute **Notes**: * Ran `bun run test -- src/components/__tests__/usage-panel.test.tsx`. * Result: 1 test file passed, 28 tests passed. * No regressions required fixes. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T016 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged usage-panel test run. ### Task T017 - Run focused home transform and subscription-strip tests **Started**: 2026-06-02 17:44 **Completed**: 2026-06-02 17:44 **Duration**: 1 minute **Notes**: * Ran `bun run test -- src/lib/__tests__/home-transforms.test.ts src/components/home/__tests__/subscription-strip.test.tsx`. * Initial run exposed that the committed Antigravity default uses `lastActiveAgo: "never"`, which the selector was treating as a usage signal. * Updated the selector to normalize `"never"` to an absent last-active state. * Reran the focused command successfully: 2 test files passed, 57 tests passed. **Files Changed**: * `src/lib/home-transforms.ts` - Treated default `"never"` last-active values as absent for Antigravity usage projection. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T017 complete and updated progress. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged transform and subscription-strip test run. **BQC Fixes**: * State freshness on re-entry: Default fallback live data no longer creates a stale active Antigravity row. * Failure path completeness: Default `"never"` last-active metadata now degrades to absent state instead of visible usage. ### Task T018 - Run final quality gates and artifact checks **Started**: 2026-06-02 17:45 **Completed**: 2026-06-02 17:45 **Duration**: 1 minute **Notes**: * Ran `bun run test -- src/components/__tests__/usage-panel.test.tsx src/components/home/__tests__/subscription-strip.test.tsx src/lib/__tests__/home-transforms.test.ts`. * Result: 3 test files passed, 85 tests passed. * Ran `bun run typecheck`. * Ran `git diff --check`. * Ran ASCII and CRLF checks on touched source files and session artifacts. * Confirmed all session tasks and completion checklist items are marked complete. **Files Changed**: * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/tasks.md` - Marked T018 and completion checklist complete. * `.spec_system/specs/phase22-session02-antigravity-usage-consumers/implementation-notes.md` - Logged final quality gates and session summary. *** ## Session Summary * Added Antigravity as an additive free local-agent row in `UsagePanel`, gated by validated usage or detected surfaces. * Added pure Antigravity selectors for browser-safe usage projection and saved-equivalent ROI contribution. * Added Antigravity saved-equivalent value into subscription ROI without changing flat monthly spend. * Added a positive-only Antigravity attribution chip in the home subscription strip. * Added focused tests for usage-panel rendering, selector edge cases, and subscription-strip ROI/chip behavior. ## Verification * `bun run test -- src/components/__tests__/usage-panel.test.tsx` - PASS, 28 tests. * `bun run test -- src/lib/__tests__/home-transforms.test.ts src/components/home/__tests__/subscription-strip.test.tsx` - PASS, 57 tests. * `bun run test -- src/components/__tests__/usage-panel.test.tsx src/components/home/__tests__/subscription-strip.test.tsx src/lib/__tests__/home-transforms.test.ts` - 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