> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase01-session06-llm-fallback-and-scan-privacy/implementation_summary.md). # Implementation Summary **Session ID**: `phase01-session06-llm-fallback-and-scan-privacy` **Package**: apps/server **Completed**: 2026-05-29 **Duration**: 1.25 hours *** ## Overview Hardened the server LLM, scan, provider-transfer, and memory surfaces for Phase 01 Session 06. LLM routes now use typed validation with compact `invalid_request` failures, provider transfer requires both `ANTHROPIC_API_KEY` and `FACTIONOS_ALLOW_LLM_PROVIDER_TRANSFER=true`, provider calls use redacted inputs plus timeout fallback, scans are restricted to approved roots, scan/memory responses redact sensitive local values, and docs describe the new privacy boundary. *** ## Deliverables ### Files Created | File | Purpose | | -------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ | | `apps/server/src/lib/llmRequestValidation.ts` | Schema validation and caps for LLM route bodies | | `apps/server/src/lib/llmPrivacy.ts` | Provider-transfer mode, scan-root allowlist, and redaction helpers | | `.spec_system/specs/phase01-session06-llm-fallback-and-scan-privacy/implementation-notes.md` | Session implementation log and verification record | | `.spec_system/specs/phase01-session06-llm-fallback-and-scan-privacy/security-compliance.md` | Session security and GDPR report | | `.spec_system/specs/phase01-session06-llm-fallback-and-scan-privacy/validation.md` | Session validation report | ### Files Modified | File | Changes | | ----------------------------------------------------- | ------------------------------------------------------------------------------------------------------------ | | `apps/server/src/lib/llmClient.ts` | Added provider-transfer opt-in, redacted provider-bound inputs, timeout fallback, and compact warnings | | `apps/server/src/llm/engines/onDemandAnalysis.ts` | Redacted analysis inputs and issue output fields | | `apps/server/src/llm/engines/planDecomposer.ts` | Redacted provider-bound prompt and conventions | | `apps/server/src/llm/engines/idleSuggestionEngine.ts` | Redacted idle context and suggestion fields | | `apps/server/src/llm/engines/transcriptMiner.ts` | Redacted transcript context, findings, tags, and summaries | | `apps/server/src/routes/llm.ts` | Wired route validation, privacy headers, scan allowlists, redacted scan metadata, and redacted memory output | | `apps/server/tests/llm.test.ts` | Added provider-blocked, validation, scan allowlist, redaction, and header coverage | | `apps/server/tests/codebaseWalker.test.ts` | Added historical ignore, symlink, byte-cap, and truncation coverage | | `apps/server/README_server.md` | Documented LLM provider opt-in, scan roots, privacy headers, and memory redaction | | `docs/api/README_api.md` | Updated concise LLM endpoint behavior | | `docs/api/event-api-hook-contracts.md` | Updated detailed LLM route contracts | | `docs/privacy-and-security.md` | Updated LLM transfer and scan privacy posture | | `package.json` | Bumped project version from `0.1.28` to `0.1.29` | | `package-lock.json` | Bumped lockfile versions from `0.1.28` to `0.1.29` | | `packages/protocol/src/index.ts` | Bumped exported runtime version from `0.1.28` to `0.1.29` | *** ## Technical Decisions 1. **Two-level provider opt-in**: `ANTHROPIC_API_KEY` marks a provider as configured, but transfer remains blocked unless `FACTIONOS_ALLOW_LLM_PROVIDER_TRANSFER=true` is present. 2. **Route-level scan root allowlist**: `walkCodebase` stays a reusable walker while `/llm/scan-codebase` enforces `process.cwd()` and `FACTIONOS_SCAN_ROOTS`. 3. **Redact, then fallback**: Provider-bound text and returned analysis/memory fields use the Session 05 redaction policy to avoid parallel privacy rules. *** ## Test Results | Check | Result | | ------------------- | ----------------------------- | | Focused Vitest | PASS - 2 files, 34 tests | | Server typecheck | PASS | | Focused Biome check | PASS | | Workspace typecheck | PASS | | Full Vitest | PASS - 1752 passed, 1 skipped | | Format check | PASS | | `git diff --check` | PASS | | ASCII/LF validation | PASS for touched files | *** ## Lessons Learned 1. Provider credentials should not imply transfer consent when local prompts and code are in scope. 2. Redacting response metadata is as important as redacting body content; absolute scan roots can reveal private local context. 3. Keeping `walkCodebase` generic and enforcing scan policy at the route boundary preserved existing walker tests while tightening the public API. *** ## Future Considerations Items for future sessions: 1. Add a unified local archive/memory erasure command and UI. 2. Revisit scan root UX in the web settings drawer so allowlist failures can explain `FACTIONOS_SCAN_ROOTS` more directly. 3. Extend provider-transfer consent into future hosted collaboration and analytics surfaces. *** ## Session Statistics * **Tasks**: 22 completed * **Files Created**: 5 * **Files Modified**: 15 * **Tests Added**: 7 * **Blockers**: 0 --- # Agent Instructions This documentation is published with GitBook. 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