fix(review): carry receipt lineage across mechanical heads

[thewrz]

This was written agentically; verify its assertions:

Why

Receipt coverage was pinned only to the reviewed head, so mandated fix commits and merge-down commits made the merge gate reject the same completed review; evidence writers also disagreed on private modes.

Stacked on #523 and also requires #527 — merge both predecessor PRs first.

What

• Record review, fix, and merge-down heads as a durable receipt lineage.
• Let the merge gate prove current-head coverage through that lineage and name uncovered commits.
• Align private evidence modes and extend gate/state regressions.

Decisions

Use append-only lineage evidence rather than rerunning an adversarial review after mechanical head advances.

Stacked on #523 and #527. After both merge, merge updated main down into this branch, push, and run chain-advance.sh --retarget --pr <this-PR> --base main before merge.

The branch includes merge-down bc6631a8569c8a2497fdee41bbf85c63448409d3 from the advanced #527 head.

Diff facts:
base=39418e2c90cadd1807f355b0ef63b9d99e38c9ae
files=11
total.insertions=201
total.deletions=31
total.lines=232
operational.files=11
operational.insertions=201
operational.deletions=31
operational.lines=232
generated.files=0
generated.insertions=0
generated.deletions=0
generated.lines=0
lockfile.files=0
lockfile.insertions=0
lockfile.deletions=0
lockfile.lines=0
fixture.files=0
fixture.insertions=0
fixture.deletions=0
fixture.lines=0
non_operational.files=0
non_operational.insertions=0
non_operational.deletions=0
non_operational.lines=0

Testing

• Full declared test suite via agent-run.sh --cmd test
• Root diff review and git diff --check

🤖 Co-authored by Codex gpt-5.6-sol orchestrator; implementation by gpt-5.6-luna high.

Closes #512

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[thewrz]

This was written agentically; verify its assertions:

Adversarial review receipt

• Reviewer: provider=anthropic; model=claude-fable-5; effort=xhigh; mode=cross-provider (reason: n/a)
• Counts: P1=1; P2=5; total=6
• Reviewed head: f488060
• Diff payload: wrzonance/agent-kit:529:916fc5cc5643c8d657763652487250be3c26ce81725453e45fb3b0e717d36625
• Confirmed finding: covered-lineage must record the current tip — verdict=fixed; fix commit SHA(s)=235c2696eab582e0ecc7b412336683813ed2ce56
• Confirmed finding: merge-down diff coverage must not be short-circuited by lineage stale — verdict=fixed; fix commit SHA(s)=235c2696eab582e0ecc7b412336683813ed2ce56
• Confirmed finding: failed publish recovery must match the current diff payload — verdict=fixed; fix commit SHA(s)=235c2696eab582e0ecc7b412336683813ed2ce56
• Confirmed finding: receipt status requires a complete supersession chain — verdict=fixed; fix commit SHA(s)=235c2696eab582e0ecc7b412336683813ed2ce56
• Confirmed finding: precheck recipes must guard fresh-shell variables — verdict=fixed; fix commit SHA(s)=235c2696eab582e0ecc7b412336683813ed2ce56
• Confirmed finding: materiality renderer differs from the review payload — verdict=declined; decline rationale=Declined after validation: materiality-check.sh and consent-record.sh share the canonical renderer; the focused materiality suite passes 25 assertions, and the reported alternate helper path is not the one used by this review.

🤖 Co-authored by Codex gpt-5.6-luna.

[thewrz]

This was written agentically; verify its assertions:

Review ledger

Machine-readable record of every review already performed on this PR.

{
  "version": 1,
  "pr": 529,
  "repo": "wrzonance/agent-kit",
  "reviews": [
    {
      "kind": "adversarial",
      "provider": "anthropic",
      "model": "claude-fable-5",
      "effort": "xhigh",
      "mode": "cross-provider",
      "harness": "codex",
      "head_sha": "f488060",
      "diff_payload": "wrzonance/agent-kit:529:916fc5cc5643c8d657763652487250be3c26ce81725453e45fb3b0e717d36625",
      "counts": {
        "p1": 1,
        "p2": 5
      },
      "reviewed_at": "2026-08-27T19:25:27Z"
    },
    {
      "kind": "adversarial",
      "provider": "anthropic",
      "model": "claude-fable-5",
      "effort": "xhigh",
      "mode": "cross-provider",
      "harness": "codex",
      "head_sha": "f488060522f009c815555b3e0f6ed729df71136b",
      "diff_payload": "wrzonance/agent-kit:529:916fc5cc5643c8d657763652487250be3c26ce81725453e45fb3b0e717d36625",
      "counts": {
        "p1": 1,
        "p2": 5
      },
      "reaffirmed_from": "f488060",
      "reaffirmedVerdict": "fix-batch-and-mechanical-merge-down",
      "reviewed_at": "2026-08-27T19:25:27Z"
    }
  ]
}

🤖 Co-authored by Codex gpt-5.6-luna.