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docs/scratchpads/gateway-security-20260313.md

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+# Gateway Security Hardening Scratchpad
+
+## Metadata
+
+- Date: 2026-03-13
+- Worktree: `/home/jwoltje/src/mosaic-mono-v1-worktrees/sec-remediation`
+- Branch: `fix/gateway-security`
+- Scope: Finish 7 requested gateway security fixes without switching branches or worktrees
+- Related tracker: worker task only; `docs/TASKS.md` is orchestrator-owned and left unchanged
+- Budget assumption: no explicit token cap; keep scope limited to requested gateway/auth/validation hardening
+
+## Objective
+
+Complete the remaining gateway security hardening work:
+
+1. Chat HTTP auth guard enforcement
+2. Chat WebSocket session validation
+3. Ownership checks on by-id CRUD routes
+4. Global validation pipe and DTO enforcement
+5. Rate limiting
+6. Helmet security headers
+7. Body limit and env validation
+
+## Plan
+
+1. Reconcile current worktree state against requested fixes.
+2. Patch or extend tests first for DTO/auth behavior mismatches.
+3. Implement minimal code changes to satisfy tests and requested behavior.
+4. Run targeted gateway tests.
+5. Run baseline gates: `pnpm typecheck`, `pnpm lint`.
+6. Perform manual code review and record findings.
+7. Commit, push branch, open PR, send OpenClaw event, remove worktree.
+
+## Progress Log
+
+### 2026-03-13T00:00 local
+
+- Loaded required Mosaic/global/runtime instructions and applicable skills.
+- Confirmed active worktree is `sec-remediation` and branch is already dirty with prior session changes.
+- Identified remaining gaps: DTO validation mismatch and non-requested socket auth helper typing/behavior drift.
+
+## TDD Notes
+
+- Required: yes. This is security/auth/permission logic.
+- Approach: update targeted unit tests first, verify failure, then patch code minimally.
+
+## Verification Log
+
+- Pending.
+
+## Risks / Blockers
+
+- Repository instructions conflict on PR merge behavior; user explicitly instructed PR-only, no merge. Follow user instruction.
+- Existing worktree contains prior-session modifications; do not revert unrelated changes.