> 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/phase21-session02-project-windows-skill-roi-defaults/implementation_summary.md). # Implementation Summary **Session ID**: `phase21-session02-project-windows-skill-roi-defaults` **Completed**: 2026-06-02 **Duration**: 3.5 hours *** ## Overview This session corrected two accuracy issues in the non-Hermes usage surface: `recentProjects` now means a true seven-day window, `allProjects` preserves a bounded long-tail history, and saved-time defaults now provide practical ROI values without requiring manual setup for every skill. *** ## Deliverables ### Files Created | File | Purpose | Lines | | --------------------------------------------------------------------------------------------------- | ---------------------------------- | ----- | | `.spec_system/specs/phase21-session02-project-windows-skill-roi-defaults/validation.md` | Validation closeout report | \~30 | | `.spec_system/specs/phase21-session02-project-windows-skill-roi-defaults/IMPLEMENTATION_SUMMARY.md` | Session summary and handoff record | \~70 | ### Files Modified | File | Changes | | ------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ | | `scripts/lib/aggregate-orchestration.ts` | Added pure project row helpers, seven-day `recentProjects`, and bounded `allProjects`. | | `src/lib/live-data-types.ts` | Extended the live-data contract with `allProjects`, `lastActiveMs`, and compatible project row fields. | | `src/lib/validate-live-data.ts` | Defaulted and validated `allProjects` while preserving legacy payload compatibility. | | `src/data/live-data.example.json` | Added sanitized example project rows for recent and long-tail history. | | `src/lib/route-transforms.ts` | Preferred `allProjects` for all-history consumers with legacy fallback behavior. | | `src/lib/transforms/workspaces.ts` | Kept the standalone workspace transform aligned with the shared project row shape. | | `src/lib/time-saved.ts` | Ported the skill-prefix default minute table and five-minute fallback. | | `scripts/lib/__tests__/aggregate-orchestration.test.ts` | Added coverage for recency filtering and bounded project history output. | | `src/lib/__tests__/nested-validation.test.ts` | Added coverage for `allProjects` validation and legacy compatibility. | | `src/lib/__tests__/route-transforms.test.ts` | Added coverage for all-history consumer selection. | | `src/lib/__tests__/time-saved.test.ts` | Added coverage for default minutes, fallback behavior, and ROI totals. | | `src/lib/__tests__/transforms.test.ts` | Updated workspace transform expectations for the richer row shape. | | `src/lib/__tests__/time-saved-hook.test.tsx` | Updated hook expectations for fallback-minute behavior. | | `src/routes/__tests__/home.test.tsx` | Updated home expectations for default saved-time values. | | `.spec_system/state.json` | Marked the session complete and recorded completion history. | | `.spec_system/PRD/phase_21/PRD_phase_21.md` | Updated phase progress and session tracker status. | | `.spec_system/PRD/PRD.md` | Updated the master phase table to In Progress. | | `README.md` | Bumped the visible version line. | | `docs/CHANGELOG.md` | Added the session closeout note and version bump trail. | | `package.json` | Bumped the patch version. | *** ## Technical Decisions 1. **Seven-day window from aggregate clock**: Recency now comes from the aggregator run clock so tests can pin behavior and the dashboard stays honest. 2. **Additive `allProjects` branch**: Long-tail history was added without breaking legacy payloads, which keeps old generated data valid while giving all-history views a better source. 3. **Conservative saved-time fallback**: A generic five-minute default keeps ROI surfaces useful for AI OS-only skills while still allowing user overrides to win. *** ## Test Results | Metric | Value | | -------- | ---------------------------- | | Tests | 2913 | | Passed | 2913 | | Coverage | Not measured in this session | *** ## Lessons Learned 1. Keep the browser contract additive when changing generated-data semantics. 2. Update stale tests alongside runtime behavior so the validation signal stays meaningful. *** ## Future Considerations Items for future sessions: 1. Complete Phase 21 Session 03 for authoritative Claude usage OAuth. 2. Continue the non-Hermes parity work in Phases 22 and 23 after the usage accuracy tranche is finished. *** ## Session Statistics * **Tasks**: 20 completed * **Files Created**: 2 * **Files Modified**: 18 * **Tests Added**: 4 * **Blockers**: 0 resolved --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://ai-os-and-trend-finder.gitbook.io/ai-os-and-trend-finder-docs/.spec_system/archive/sessions/phase21-session02-project-windows-skill-roi-defaults/implementation_summary.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.