> 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/phase31-session01-demo-mode-foundation/implementation_summary.md). # Implementation Summary **Session ID**: `phase31-session01-demo-mode-foundation` **Completed**: 2026-06-24 **Duration**: 0.5 hours *** ## Overview Completed the Phase 31 public-demo foundation. The session added one explicit `VITE_AI_OS_PUBLIC_DEMO` boundary, kept it separate from fallback `isExample` data, made registered extensions visible in demo mode, and split demo-pages static output from the normal Cloudflare Worker build path. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ----------------------------------------------------------------------------------- | ------------------------------------------ | ----- | | `src/lib/public-demo.ts` | Shared public-demo flag parser and helpers | \~19 | | `src/lib/__tests__/public-demo.test.ts` | Parser and `isExample` separation tests | \~76 | | `.spec_system/specs/phase31-session01-demo-mode-foundation/implementation-notes.md` | Session evidence and handoff notes | \~689 | | `.spec_system/specs/phase31-session01-demo-mode-foundation/code-review.md` | Review and repair report | \~119 | | `.spec_system/specs/phase31-session01-demo-mode-foundation/security-compliance.md` | Security and GDPR review | \~79 | | `.spec_system/specs/phase31-session01-demo-mode-foundation/validation.md` | Final validation report | \~211 | ### Files Modified | File | Changes | | --------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | | `.spec_system/state.json` | Marked Session 01 complete, cleared current session, and moved Phase 31 to in progress. | | `.spec_system/PRD/phase_31/PRD_phase_31.md` | Updated progress to 1/7 sessions and moved Session 01 to completed. | | `package.json` | Incremented patch version from `0.5.04` to `0.5.05`. | | `README.md` | Updated the displayed version to `0.5.05`. | | `src/extensions/registry.ts` | Forced all statically registered extensions visible in public demo mode while preserving normal env parsing. | | `src/lib/setup-config.ts` | Reported public-demo forced extension visibility without weakening normal extension locks. | | `src/vite-env.d.ts` | Added public-demo Vite env typing. | | `vite.config.ts` | Added demo-pages mode detection, skipped the Worker plugin for demo builds, and emitted static client output under `demo-website/dist`. | | `src/start.ts` | Added demo-only static SSR default behavior while preserving existing error middleware. | | `src/lib/__tests__/extension-registry.test.ts` | Added public-demo extension visibility coverage. | | `src/lib/__tests__/setup-config-extensions.test.ts` | Added setup-config public-demo coverage. | *** ## Technical Decisions 1. **Separate demo flag**: Public hosted demo state uses `VITE_AI_OS_PUBLIC_DEMO` and does not reuse fallback `isExample` semantics. 2. **Static registry override**: Public demo mode returns the compile-time extension registry so every surface remains visible for later safe-state work. 3. **Demo output split**: `demo-pages` builds write static client output under `demo-website/dist`, while normal builds keep the existing Worker output. 4. **Mode propagation**: Demo-pages mode sets the process env flag for TanStack prerender internals so mode-only builds behave like explicit env builds. *** ## Test Results | Metric | Value | | -------------------- | ------------- | | Focused Tests | 68 passed | | Full Vitest | 4111 passed | | Typecheck | PASS | | Script Typecheck | PASS | | Normal Worker Build | PASS | | Demo Pages Build | PASS | | Targeted Lint/Format | PASS | | Coverage | Not collected | *** ## Lessons Learned 1. TanStack Start's demo static path needs the demo mode decision available to build-time and internal prerender configuration, not only browser code. 2. Pages packaging should use the static client output and leave generated server support artifacts out of the deployed artifact in a later session. *** ## Future Considerations Items for future sessions: 1. Session 02 should add the allowlist-first snapshot exporter and committed browser-safe demo fixtures. 2. Session 03 should route runtime data to `/demo/*` assets and block hosted local bridge and mutation calls. 3. Session 05 should add Pages `_headers`, `_redirects`, scripts, preview commands, and deployment documentation around `demo-website/`. *** ## Session Statistics * **Tasks**: 20 completed * **Files Created**: 6 core session deliverables plus this summary * **Files Modified**: 11 core session/updateprd files * **Tests Added**: 3 focused test surfaces * **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. 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