test: remove orphaned truth-gate fixture left by #1431

[groupthinking]

Canonical issue

Closes #1474

Outcome

tests/fixtures/agent_completion/ no longer exists. ci: retire the agent-completion truth gate (#1431) (8cd4a10ca) deleted both readers of pr_813.json but left the fixture in the tree.

Path	State on main
scripts/ci/agent_completion_gate.py	deleted by #1431
tests/unit/test_agent_completion_gate.py	deleted by #1431
tests/fixtures/agent_completion/pr_813.json	still present, no reader

The fixture encodes the retired gate's payload schema (policy.applicable, agent_login, run_id, head_sha). With nothing loading it, it reads as a live contract for a mechanism that no longer exists — the same misleading-artifact class #1431 and #1434 were closing.

Scope

• Included: deletion of tests/fixtures/agent_completion/pr_813.json (the directory's only file).
• Explicitly excluded:
  • docs/runbook/pr-remediation-report-2026-08-04.md:11 — the one remaining agent_completion mention in the repo. It is a historical runbook narrating the retirement, not a load of the fixture, and is left unchanged deliberately.
  • The truth-gate decision itself, which ci: retire the agent-completion truth gate #1431 settled.

Risk

• Risk level: low
• Failure mode: none identified. A deletion can only break a reader, and the orphan check below is exhaustive over the file types that could load it.
• Rollback: git revert. No runtime, deployed, or data surface.

Verification

Head 2994e246, base 8c93de8bb. One file, -76.

• Full unit suite passes with the fixture deleted — the decisive check, since a deletion can only fail by breaking a reader:

  $ pytest tests/unit -q --no-cov -n 4
  8073 passed, 5 xpassed in 61.93s
  

  Zero failures, zero collection errors. This also independently clears main after the 14-PR merge sweep of 2026-08-07 (d9bab00e → 8c93de8b), whose own post-merge CI was still queued when this was run.

• Orphan status established by exhaustive grep, not assumed:

  $ grep -rn "agent_completion" --include=*.py --include=*.yml --include=*.yaml \
      --include=*.md --include=*.json --include=*.sh . \
      | grep -v '^./tests/fixtures/agent_completion/'
  ./docs/runbook/pr-remediation-report-2026-08-04.md:11:> `agent-completion-enforcement.yml`, `agent_completion_gate.py`, and
  

  Exactly one hit, and it is prose. No Python, workflow, or shell reference remains.

• Both readers confirmed gone from main:

  $ git ls-tree -r --name-only origin/main | grep -E 'agent_completion_gate|agent-completion-enforcement'
  (no output)
  

• The four tests that read tests/fixtures/ do not touch it. test_transcript_action_workflow.py, test_gemini_grok_failover.py, test_firestore_state.py, test_backend_main.py — a grep for agent_completion across all four returns nothing.

• Required CI — queued. Every GitHub Actions job on this head was still queued 90 s after open; the sweep's 14 pushes saturated the runner pool. Only Vercel's own checks (which do not use GitHub runners) had reported, both success.

• Review threads resolved — none open.

Note on the CodeRabbit status

Review skipped: excluded by label configuration, written ~3 s after this PR opened, while the label job was still queued — so no labels had been applied yet. This is confounded and should not be cited as evidence for #1424: this PR is also a draft, and .coderabbit.yaml sets auto_review.drafts: false, which is independently sufficient to explain the skip. #1440 remains the unconfounded case.

Production evidence

Not applicable. This deletes a test fixture; it ships no runtime code and has no deployable surface. Nothing under apps/web/**, so MERGE_POLICY.md gate 4 (preview) does not apply. The Vercel preview on this head is READY regardless.

Agent handoff

• One canonical issue is linked — Orphaned truth-gate fixture left behind by #1431 #1474
• No competing PR implements the same issue — no other open PR touches tests/fixtures/agent_completion/
• Acceptance criteria are satisfied — all three on Orphaned truth-gate fixture left behind by #1431 #1474
• Required checks pass on the current head — queued, see above
• Human decision is requested only for: merge approval

Agent provenance

Agent-authored under the PR remediation runbook. Found while verifying that #1409 ("arm the truth gate only on a real dispatch contract") is obsolete — that PR patches docs/agent-completion-truth-gate.md and tests/unit/test_agent_completion_gate.py, both now deleted from main. This fixture was the remaining artifact of the same retirement.

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Project	Deployment	Actions	Updated (UTC)
v0-uvai	Ready	Preview, v0	Aug 7, 2026 8:56pm

[coderabbitai]

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 2994e24.

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Scanned Files

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[linear-code]

GRV-437