stack/docs/scratchpads/gateway-security-20260313.md

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

• pnpm --filter @mosaic/gateway test -- src/chat/__tests__/chat-security.test.ts src/__tests__/resource-ownership.test.ts
  • Red: failed on socket session reshaping and DTO role/length mismatches.
  • Green: passed with 3 test files and 20 tests passing.
• pnpm typecheck
  • Pass on 2026-03-13 with 18/18 package typecheck tasks successful.
• pnpm lint
  • Pass on 2026-03-13 with 18/18 package lint tasks successful.
• pnpm format:check
  • Pass on 2026-03-13 with All matched files use Prettier code style!

Review Log

• Manual review completed against auth, authorization, validation, and runtime hardening requirements.
• No blocker findings remained after remediation.

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.
• missions and tasks currently depend on project ownership because the schema does not carry a direct user owner column.