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wt a02412d7c7 S00-021: Approve S00-021: independently verified browser OMEMO blocker

Changes:
- Wrote state/evidence/S00-021-review.md recording independent re-checks of the
  executor's remediation for S00-004's interruption ("Agent timed out before
  escalation").
- Reproduced both committed probes unchanged: smoke.mjs exit 0 (SMOKE_PASS,
  631-byte session record byte-for-byte reload) and wasm-unsupported.mjs exit 2
  (wasmFiles 0, native-only prebuilds), matching executor evidence exactly.
- Independently re-queried npm registry: @signalapp/libsignal (browser WASM) E404;
  @signalapp/libsignal-client 0.105.0 (native, AGPL-3.0) exists; confirms the
  browser/worker/WASM + OMEMO2 wire-layer blocker is genuine.
- Audited scope via git: commit 30f7f22 touches only the in-scope ADR
  docs/decisions/0003-crypto-library.md plus workflow metadata; experiments/**
  unchanged; working tree clean. No requirement bypass: S00-004 remains blocked,
  ADR 0003 records the honest blocker and forbids done on persistence+Ratchet alone.

Validation:
- make check: 72 tooling tests OK.
- Both probes reproduced, exit codes and output match evidence.
- Acceptance met: interruption repro row exists for next executor; original not
  declared done via bypass.

Task: S00-021
Reviewer agent: auto-security-5d2ae592b569
Role: security
Action: approve

Task: S00-021
Agent: auto-security-5d2ae592b569
Role: security
Action: review
Status: done

Task title: Устранить прерывание: Проверить browser OMEMO backend

2026-10-15 15:40:32 +07:00

3.5 KiB

Raw Blame History

S00-021 - Review evidence (security reviewer)

Reviewer agent: auto-security-5d2ae592b569
Role: security
Task: S00-021 (remediation of S00-004)
Owner (executor): auto-crypto-fcef9b6781bf
Date: 2026-10-15
Result: APPROVE

Scope of review

Verify the executor removed the stated interruption cause ("Agent timed out; process terminated before escalation") by reproducibly proving S00-004 readiness, without a requirement bypass. Read: handoff, blocker, ADR 0003, evidence, task card, allowed paths.

Independent re-checks performed

1. Reproduction of the two committed probes (run unchanged from project root)

node experiments/0003-crypto-library/session-probe/smoke.mjs Actual: exit code 0, SMOKE_PASS. Matches evidence: KAS_OK known plaintext, 631-byte session record stored and reloaded byte-for-byte via @signalapp/libsignal-client sealed-sender PreKey APIs (audited engine, no homegrown ratchet).
node experiments/0003-crypto-library/session-probe/wasm-unsupported.mjs Actual: exit code 2, UNSUPPORTED_BLOCKER, wasmFiles: 0, prebuilds are native *.node (darwin-arm64 ... win32-x64). Matches evidence: no .wasm ships; the distribution cannot run in a browser worker/WASM endpoint.

Both probes reproduce the evidence exactly. The interruption scenario is therefore reproducibly re-established rather than dissimulated.

2. Registry availability (independent, public npm registry, this run)

npm view @signalapp/libsignal version -> E404 Not Found (WASM web distribution not published to reachable registry). Confirms evidence.
npm view @signalapp/libsignal-client version -> 0.105.0 (native addon; AGPL-3.0). Confirms evidence and that the E404 is genuine (same proxy serves the real version).

3. Scope audit (git)

git status: working tree clean after the executor commit; nothing uncommitted.
git show --stat HEAD (30f7f22): changed files are only the in-scope ADR docs/decisions/0003-crypto-library.md plus workflow metadata (evidence, handoff, commit message, state/tasks.json, generated matrices/cards).
experiments/0003-crypto-library/** unchanged (no commit touches it). Full scope compliance with allowed paths; no spec/plan/shared-contract/source edits.

4. ADR content and honesty

docs/decisions/0003-crypto-library.md (proposed) states precise capabilities and boundaries with traceable primary sources. It adopts @signalapp/libsignal-client only as the audited session/ratchet + persistence primitive for the Node-side spike, and records the browser/worker/WASM endpoint + OMEMO2 wire layer as a blocker (not success). No homegrown algorithm, no plaintext fallback, no server-side decryption path is introduced. S00-004 is left blocked; the ADR explicitly forbids declaring it done on the persistence+Ratchet part alone, preserving ENC-009/ENC-011.

5. Foundation integrity

make check -> 72 tooling tests, OK (exit 0). Confirms executor's claim.

Acceptance assessment

Interruption cause reproducibly resolved: probe scenario reproduces exactly as documented and the browser/WASM OMEMO2 blocker is truthfully recorded for the next executor (not a timeout dead-end). PASS.
No requirement bypass: S00-004 not declared done; blocker preserved; no fake success. PASS.

Conclusion

Unit-of-outcome met the card acceptance and focused checks; all evidence independently confirmed; scope clean. APPROVE.

Communications

Executor commit message (30f7f22) accurately matches the actual diff and checks; no fabricated results found.

3.5 KiB Raw Blame History