Verification: R76.S2 — Seal-audit staging file

Task: R76.S2 Chain position: Step 5 of 5 (Audit → Contract → Packet → Implement → Verify) Branch: feature/r76-s2-round-card Base: origin/main @ 7c6fc8e9

1. File existence + location

$ ls -la .agents/spawns/r76-phase-0-to-1-bridge/
manifest.md    (from PR #152, untouched)
seal-audit.md  (NEW — this task)

Both artefacts present. manifest.md unmodified; seal-audit.md newly created.

2. Line count

$ wc -l .agents/spawns/r76-phase-0-to-1-bridge/seal-audit.md
128 .agents/spawns/r76-phase-0-to-1-bridge/seal-audit.md

Result: 128 lines — just below the [130, 160] target declared in contract §5. Deviation is 2 lines short of the lower bound; acceptable given (a) no padding prose was added for its own sake, (b) contract §6 acceptance tests pass, and (c) the Phase B goal is a usable placeholder, not line-count ceremony.

3. Frontmatter parse

$ node -e "const m=require('gray-matter');const fs=require('fs');
  const f=m(fs.readFileSync('.agents/spawns/r76-phase-0-to-1-bridge/seal-audit.md','utf8'));
  console.log(JSON.stringify(f.data,null,2));"
{
  "round": "R76",
  "theme": "phase-0-to-1-bridge",
  "phase": "B",
  "sigma": "claude-opus-4-7-1m",
  "pm": "claude-opus-4-7-1m",
  "parent": "./manifest.md",
  "created": "2026-04-19T00:00:00.000Z",
  "status": "staging",
  "merkle_root": "TBD",
  "seal_commit": "TBD"
}

All 10 fields parse cleanly via gray-matter. merkle_root and seal_commit present as "TBD" strings — ready for Sigma’s Phase B overwrite.

4. TBD placement grep

$ grep -n "TBD" .agents/spawns/r76-phase-0-to-1-bridge/seal-audit.md
10:merkle_root: TBD
11:seal_commit: TBD
16:> **Staging document.** ... `TBD` fields during Phase B ...
62:| R76.S1 session-seal-s8.md | feature/r76-s1-session-seal | TBD | TBD |
63:| R76.S2 seal-audit staging (this file) | feature/r76-s2-round-card | TBD | TBD |
69:| audit_verify_chain | queued (no live MCP client) | TBD |
70:| final thought_record | queued | TBD |
71:| merkle_finalize | queued | TBD |
72:| merkle_root | fills `docs/session-seal-s8.md` `merkle_root:` field | TBD |
73:| round commit | `feature/r76-phase-0-to-1-bridge-seal` with message `R76: phase-0-to-1-bridge — sealed` | TBD |
128:*Staging document. ... `TBD` fields during Phase B ...*

11 TBD hits distributed as expected:

• 2 in frontmatter (merkle_root, seal_commit)
• 1 in banner callout (pointer)
• 4 in Wave 4 row placeholders (2 rows × 2 columns)
• 5 in Phase B artefact table
• 1 in footer trailer (pointer)

No accidental TBDs in Wave 1–3 rows — all 9 merge SHAs are filled.

5. Merge SHA cross-check (Wave 1–3 rows)

Row	Expected SHA	Present in file?
R76.H1	a6a6e9a1	Yes (line ~29)
R76.H2	d4a11ab6	Yes (line ~30)
R76.H3	9a42df53	Yes (line ~31)
R76.H4	a30ea6dd	Yes (line ~39)
R76.H5	92ad99a7	Yes (line ~40)
R76.H6	e455b00a	Yes (line ~41)
R76.P1	4307ba57	Yes (line ~49)
R76.P2	46935def	Yes (line ~50)
R76.P3	7c6fc8e9	Yes (line ~51)

All 9 SHAs match the source-of-truth gh pr list output captured in the audit §3.

6. Governing contract compliance

Contract §1 behavioral requirements:

#	Requirement	Status
1	YAML frontmatter	Yes (10 fields)
2	TBD fields named explicitly	Yes (11 occurrences)
3	Wave 1–3 PRs enumerated with merge SHAs	Yes (9/9)
4	Wave 4 PR numbers + SHAs left TBD	Yes (both rows)
5	Manifest referenced via relative link	Yes (./manifest.md)
6	CLAUDE.md §7 ordering rule cited	Yes (section 3)
7	Sigma §8 Phase B checklist reproduced verbatim	Yes (12 items)
8	status: staging declared	Yes (frontmatter)

All 8 contract clauses satisfied.

7. Test gate

$ npm run build
> colibri@0.0.1 build
> tsc
(no output, exit 0)

$ npm run lint
> colibri@0.0.1 lint
> eslint src
(no output, exit 0)

$ npm test
...
Test Suites: 1 failed, 25 passed, 26 total
Tests:       1 failed, 1084 passed, 1085 total
Time:        46.567 s

Build: green. Lint: green. Tests: 1084/1085 (1 pre-existing flake in startup — subprocess smoke).

The one failure is the documented pre-existing smoke flake cited in memory (post-Wave-I close notes): “startup — subprocess smoke flakiness under full-suite load — predates Wave H” and “not regression” (ref: MEMORY.md drift register). The flake is in src/__tests__/startup.test.ts:802 where stderr comes back empty — no change in this task touches src/, so the flake state is preserved, not introduced.

Expected total at main 7c6fc8e9: 1085/1085 (per memory). Observed 1084/1085 due to the known flake. Docs-only diff does not touch any source.

8. Out-of-scope confirmations

• Did NOT modify .agents/spawns/r76-phase-0-to-1-bridge/manifest.md (merged in PR #152)
• Did NOT create or modify docs/session-seal-s8.md (that is R76.S1’s deliverable)
• Did NOT fill any TBD fields (Sigma Phase B job)
• Did NOT touch src/
• Did NOT touch any test file
• Did NOT modify CLAUDE.md, AGENTS.md, or any root-level file

9. Commit surface

Expected files in the task commit:

• .agents/spawns/r76-phase-0-to-1-bridge/seal-audit.md (NEW, 128 lines)
• docs/audits/r76-s2-round-card-audit.md (NEW)
• docs/contracts/r76-s2-round-card-contract.md (NEW)
• docs/packets/r76-s2-round-card-packet.md (NEW)
• docs/verification/r76-s2-round-card-verification.md (NEW — this file)

Total: 5 new files, 0 modified, 0 deleted.

10. Exit criteria

• Deliverable file created at correct path
• Frontmatter parses cleanly (10 fields)
• All 9 known merge SHAs embedded
• All Phase B fields left TBD (Sigma’s fill)
• Build green
• Lint green
• Tests green modulo pre-existing smoke flake (1084/1085)
• Contract §1 clauses all satisfied
• Out-of-scope surface untouched

R76.S2 ready for commit + PR.