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# Implementation Summary

**Session ID**: `phase40-session03-shared-redaction-foundation` **Completed**: 2026-07-02 **Duration**: 1 hour

***

## Overview

Completed the Session 03 shared redaction foundation for the Phase 40 Claude OS 2.10.1 semantic port. The implementation adds reusable bridge-output redaction and likely-secret detection helpers in `scripts/lib/sanitize.ts`, migrates Hermes admin command/chat output and persona/YAML warning detection onto those helpers, and reuses the detector in the Hermes dev bridge while preserving safe model, provider, and MoA identifiers.

***

## Deliverables

### Files Created

| File                                                                                         | Purpose                             | Lines |
| -------------------------------------------------------------------------------------------- | ----------------------------------- | ----- |
| `.spec_system/specs/phase40-session03-shared-redaction-foundation/code-review.md`            | Review and repair report            | \~85  |
| `.spec_system/specs/phase40-session03-shared-redaction-foundation/security-compliance.md`    | Security and GDPR compliance report | \~87  |
| `.spec_system/specs/phase40-session03-shared-redaction-foundation/validation.md`             | Session validation report           | \~189 |
| `.spec_system/specs/phase40-session03-shared-redaction-foundation/IMPLEMENTATION_SUMMARY.md` | Final updateprd summary             | \~106 |

### Files Modified

| File                                                | Changes                                                                                            |
| --------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| `scripts/lib/sanitize.ts`                           | Added shared bridge-output redaction and likely-secret detection helpers.                          |
| `scripts/lib/__tests__/sanitize.test.ts`            | Added positive and negative coverage for bridge redaction, secret detection, and safe identifiers. |
| `scripts/lib/hermes-admin-bridge.ts`                | Replaced local command/chat redaction and warning detection with shared helpers.                   |
| `scripts/lib/__tests__/hermes-admin-bridge.test.ts` | Added command, chat, failure-detail, and persona/YAML warning redaction coverage.                  |
| `scripts/lib/hermes-dev-bridge.ts`                  | Reused the shared detector for unsafe model/configured output filtering.                           |
| `scripts/lib/__tests__/hermes-dev-bridge.test.ts`   | Added safe model, provider, and MoA identifier regression coverage.                                |
| `.spec_system/PRD/phase_40/PRD_phase_40.md`         | Marked Session 03 complete and updated phase progress.                                             |
| `.spec_system/state.json`                           | Recorded Session 03 completion and cleared the current session.                                    |
| `package.json`                                      | Bumped package version from 0.5.106 to 0.5.107.                                                    |
| `README.md`                                         | Updated the visible version line to 0.5.107.                                                       |
| `docs/CHANGELOG.md`                                 | Added the Session 03 release note.                                                                 |

***

## Technical Decisions

1. **Shared sanitizer ownership**: Keep bridge-output redaction in `scripts/lib/sanitize.ts` so future command, chat, and MoA paths use one tested contract.
2. **Narrow secret detection**: Detect clearly unsafe keys, token shapes, account IDs, user/channel/chat IDs, and long opaque values without flagging safe provider slugs, model IDs, or normal diagnostics.
3. **Stable bridge contracts**: Reuse the shared detector in Hermes admin and dev bridge code without changing public response shapes.
4. **Foundation-only scope**: Leave command endpoint, MoA save endpoint, and chat override implementation to their later Phase 40 sessions.

***

## Test Results

| Metric         | Value         |
| -------------- | ------------- |
| Focused Tests  | 95            |
| Focused Passed | 95            |
| Full Tests     | 4679          |
| Full Passed    | 4679          |
| Coverage       | Not collected |

***

## Lessons Learned

1. Secret detection must stay narrower than redaction so safe model and provider identifiers remain visible in browser-safe bridge responses.
2. Persona/YAML warning detection should share the same detector as bridge output filtering to avoid endpoint-local regex drift.
3. Safe MoA preset names and short warning codes need explicit false-positive coverage before later command and save endpoints depend on the helper.

***

## Future Considerations

Items for future sessions:

1. Session 04 should use the shared sanitizer for chat override output and streaming diagnostics.
2. Session 05 and Session 06 should route command and MoA save responses through the same bridge-output helper.
3. Session 08 and Session 09 should keep catalog, context, pricing, and model intelligence output inside the same no-leak boundary.

***

## Session Statistics

* **Tasks**: 18 completed
* **Files Created**: 4
* **Files Modified**: 11
* **Tests Added**: Shared sanitizer, Hermes admin bridge, and Hermes dev bridge redaction coverage
* **Blockers**: 0 resolved


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