> 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/phase38-session05-runtime-bridge-hardening/implementation_summary.md). # Implementation Summary **Session ID**: `phase38-session05-runtime-bridge-hardening` **Completed**: 2026-06-29 **Duration**: 0.7 hours *** ## Overview Completed Phase 38 Session 05 by hardening AI OS local control-plane request guards and routing runtime Hermes and Graphify command discovery through shared platform-aware helpers. Privileged local endpoints now combine socket loopback checks with exact local Host-header validation, while bridge command resolution supports source venv Python, configured binaries, PATH, Windows wrappers, PATHEXT, app-data npm, local-programs, and POSIX fallback candidates without shell execution. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ----------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- | ----- | | `scripts/lib/local-control-plane-guard.ts` | Pure local socket and Host-header guard helpers. | 68 | | `scripts/lib/__tests__/local-control-plane-guard.test.ts` | Unit coverage for valid local hosts, hostile hosts, ports, brackets, absent Host, and remote sockets. | 106 | | `.spec_system/specs/phase38-session05-runtime-bridge-hardening/implementation-notes.md` | Task-by-task implementation evidence and command results. | 672 | | `.spec_system/specs/phase38-session05-runtime-bridge-hardening/code-review.md` | Review findings, repairs, and verification evidence. | 58 | | `.spec_system/specs/phase38-session05-runtime-bridge-hardening/security-compliance.md` | Security and GDPR review evidence. | 63 | | `.spec_system/specs/phase38-session05-runtime-bridge-hardening/validation.md` | Final validation report and evidence ledger. | 184 | | `.spec_system/specs/phase38-session05-runtime-bridge-hardening/IMPLEMENTATION_SUMMARY.md` | Session closeout summary. | 110 | ### Files Modified | File | Changes | | ------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------- | | `scripts/lib/tool-detection.ts` | Added runtime CLI resolution with configured candidates, explicit candidates, PATH/fallback discovery, source labels, and injectable path checks. | | `scripts/lib/hermes-admin-bridge.ts` | Resolved Hermes source Python and wrapper binaries through shared platform and runtime CLI helpers while preserving chat behavior and sanitized failures. | | `scripts/lib/knowledge-graph-admin-bridge.ts` | Resolved Graphify status and ingest commands through shared runtime CLI detection while preserving existing response and safety contracts. | | `vite.config.ts` | Routed local loopback checks through the shared local control-plane guard for privileged local endpoints. | | `scripts/lib/__tests__/tool-detection.test.ts` | Added runtime resolver coverage for configured paths, Windows app-data npm wrappers, and missing commands. | | `scripts/lib/__tests__/hermes-admin-bridge.test.ts` | Added Hermes source venv, configured wrapper, Windows wrapper, graph/yolo, and sanitized failure regressions. | | `scripts/lib/__tests__/hermes-dev-bridge.test.ts` | Preserved read-only Hermes status behavior under the hardened guard contract. | | `scripts/lib/__tests__/knowledge-graph-admin-bridge.test.ts` | Added Graphify configured/path/missing, Windows wrapper, ingest selection, and redaction regressions. | | `.spec_system/state.json` | Marked the session validated and complete, cleared the active session, and kept Phase 38 in progress. | | `.spec_system/PRD/phase_38/PRD_phase_38.md` | Marked Session 05 complete and advanced Phase 38 progress to 5/10. | | `.spec_system/PRD/phase_38/session_05_runtime_bridge_hardening.md` | Marked the session complete and checked off prerequisites and success criteria. | | `README.md` | Updated the release version line to 0.5.78. | | `docs/CHANGELOG.md` | Added the Phase 38 Session 05 closeout entry. | | `package.json` | Bumped package version from 0.5.77 to 0.5.78. | *** ## Technical Decisions 1. **Pure guard helper**: Host validation lives in `scripts/lib/local-control-plane-guard.ts` so Vite endpoint wiring can reuse one tested trust-boundary implementation. 2. **Shared runtime resolver**: Hermes and Graphify use shared runtime CLI discovery instead of maintaining separate POSIX-only path lists in bridge modules. 3. **Defense in depth**: Host-header checks were added alongside socket loopback, token, admin, body-size, method, and path checks rather than replacing any existing gate. 4. **Contract preservation**: Bridge JSON/SSE result shapes, source labels, timeout cleanup, path redaction, and existing error codes were preserved except for the intended hostile-Host rejection. *** ## Test Results | Metric | Value | | -------- | -------------------------------- | | Tests | 4523 | | Passed | 4523 | | Coverage | N/A - coverage was not collected | Additional gates passed: focused guard/helper tests, focused bridge tests, Dream regressions, `bun run typecheck:scripts`, `bun run typecheck`, `bun run lint`, `git diff --check HEAD`, ASCII/LF checks, security review, and behavioral quality review. *** ## Lessons Learned 1. Host-header validation must distinguish absent Host from present empty or malformed Host values; treating both as equivalent weakens the endpoint boundary. 2. Runtime bridge command discovery should share the platform helper layer so Windows wrapper and venv behavior stays consistent across aggregate scans and live request-time execution. *** ## Future Considerations Items for future sessions: 1. Session 06 can rely on the hardened bridge layer while updating docs, license, policy, and catalog artifacts. 2. Session 08 voice broker work should reuse this guard before exposing voice launch behavior through Hermes chat paths. 3. Session 10 should include this session in the hunk reconciliation ledger as the semantic replacement for upstream Vite runtime CLI and Host-header hunks. *** ## Session Statistics * **Tasks**: 20 completed * **Files Created**: 7 * **Files Modified**: 14 * **Tests Added**: 1 new test file and 4 updated regression suites * **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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