> 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/phase18-session02-mnemosyne-constellation-readonly/implementation_summary.md). # Implementation Summary **Session ID**: `phase18-session02-mnemosyne-constellation-readonly` **Completed**: 2026-06-02 **Duration**: \~0.8 hours *** ## Overview Completed the Hermes Mnemosyne read-only 3D constellation for Phase 18. The session added a lazy-loaded Mnemosyne tab, a typed data adapter over the existing Hermes query views, raw `three` bloom handling, responsive canvas behavior, reduced-motion support, and cleanup-safe dynamic imports. Validation passed across unit tests, Playwright checks, typecheck, lint, build, and bundle-budget verification. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ------------------------------------------------------------------------------------------------- | ------------------------ | ----- | | `.spec_system/specs/phase18-session02-mnemosyne-constellation-readonly/IMPLEMENTATION_SUMMARY.md` | Session closeout summary | \~70 | ### Files Modified | File | Changes | | ----------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------ | | `src/components/hermes/hermes-mnemosyne.tsx` | Added the lazy Mnemosyne tab UI, dynamic imports, bloom, controls, reduced-motion support, and cleanup paths | | `src/components/hermes/hermes-mnemosyne-data.ts` | Added the typed read-only graph adapter, bounded labels, and exhaustive query-state handling | | `src/components/hermes/__tests__/hermes-mnemosyne.test.tsx` | Added adapter and component coverage for the new constellation surface | | `src/components/hermes/__tests__/hermes-sections.test.tsx` | Added Hermes page coverage for the Mnemosyne tab wiring | | `src/components/hermes/hermes-read-only-page.tsx` | Wired the lazy Mnemosyne tab into the Hermes host page | | `.spec_system/specs/phase18-session02-mnemosyne-constellation-readonly/spec.md` | Marked the session complete | | `.spec_system/specs/phase18-session02-mnemosyne-constellation-readonly/tasks.md` | Marked all tasks complete | | `.spec_system/specs/phase18-session02-mnemosyne-constellation-readonly/validation.md` | Recorded the PASS validation result | | `.spec_system/specs/phase18-session02-mnemosyne-constellation-readonly/implementation-notes.md` | Recorded verification evidence and task closeout | | `.spec_system/archive/phases/phase_18/PRD_phase_18.md` | Marked phase 18 complete and updated the progress tracker | | `.spec_system/PRD/PRD.md` | Updated the master PRD phase table and phase 18 closeout note | | `.spec_system/state.json` | Cleared the active session, marked phase 18 complete, and recorded the closeout history entry | | `package.json` | Bumped the patch version to `0.1.242` | *** ## Technical Decisions 1. **Keep the 3D surface lazy-loaded**: the Mnemosyne tab and vendor imports stay out of the base Hermes route bundle. 2. **Use raw `three` for bloom**: the existing dependency set was enough, so no extra rendering package was needed. 3. **Treat read states explicitly**: loading, empty, error, offline, token failure, demo, and success states all render distinct user feedback. *** ## Test Results | Metric | Value | | -------- | ------------ | | Tests | 82 | | Passed | 82 | | Coverage | Not measured | *** ## Lessons Learned 1. The existing Hermes query views already contained enough structure to build a useful read-only constellation without adding new bridge endpoints. 2. Dynamic imports and cleanup-first effects are mandatory for WebGL-style UI surfaces that need to remain SSR-safe and test-friendly. *** ## Future Considerations 1. Re-run the Hermes mode matrix after the remaining Phase 19 and Phase 20 surfaces are added. 2. Keep the bundle-budget guard tuned if future 3D vendor dependencies are introduced. *** ## Session Statistics * **Tasks**: 22 completed * **Files Created**: 1 * **Files Modified**: 13 * **Tests Added**: 2 * **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. 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