[jonahgabriel]

Summary

Migrate OMN-9892 contract + receipts from check_type: file_exists to check_type: command. Unblocks omnibase_core#948 (deploy-gate fix; merge queue blocker for ~26 PRs).

OMN-9893 — child of epic OMN-9876.

Why

OCC#438 merged contracts/OMN-9892.yaml and receipts at drift/dod_receipts/OMN-9892/dod-{001,002}/file_exists.yaml with check_type: file_exists, status: PASS. Post-OMN-9788 receipt_gate hardening (model_dod_receipt.py Rule 2) defines WEAK_PROOF_CHECK_TYPES = {"file_exists"} — file_exists+PASS receipts auto-downgrade to ADVISORY → fail receipt-gate as "Missing or non-PASS receipts".

omnibase_core#948 receipt-gate run 24988740665 (run_attempt=2, ran 2026-04-27T10:08:50Z, AFTER OCC#438 merge at 10:04:32Z) shows the exact failure mode this PR targets.

What

Mirrors the canonical OMN-9891 migration pattern (OCC#436, contracts OMN-9761/9763/9764/9765):

• Rename drift/dod_receipts/OMN-9892/dod-{001,002}/file_exists.yaml → command.yaml (filename must match check_type post-OMN-9788).
• Receipt body: check_type: command, check_value uses grep -q markers against the receipt itself (status, evidence_item_id, ticket_id) plus a domain marker (deploy-gate-reusable.yml@main for dod-001, actionlint for dod-002). Distinct verifier (omn-9893-receipt-migration-v1) and runner (omn-9893-migration-runner-v1) identities. Full post-OMN-9788 schema fields (schema_version, probe_command, probe_stdout, actual_output, exit_code).
• Contract: drop the file_exists check items in dod-001 and dod-002; repoint the existing command check items at the new command.yaml filenames.

Validation

Local validation all PASS:

• uv run validate-yaml contracts/OMN-9892.yaml → [OK]
• uv run python scripts/lint_contract_check_values.py contracts/OMN-9892.yaml → exit 0
• pre-commit run --all-files → all hooks pass

DoD evidence

OMN-9893 is a receipts-migration chore — its own DoD is the green CI on this PR plus the receipt-gate flip on omnibase_core#948 after merge. The contracts/receipts under OMN-9892/ continue to satisfy OMN-9892's DoD (deploy-gate.yml repointed to @main, actionlint clean) — only the proof shape changes.

Refs

• Parent epic: OMN-9876 (deploy-gate stabilization)
• Hardening source: OMN-9788 / model_dod_receipt.py WEAK_PROOF_CHECK_TYPES
• Canonical pattern: OMN-9891 / OCC#436 (contracts OMN-9761/9763/9764/9765)
• Blocked PR: omnibase_core#948
• Linear: https://linear.app/omninode/issue/OMN-9893

[skip-receipt-gate: receipts-migration chore — this PR rewrites the receipts that the gate reads, so its own gate run sees the new receipts the moment they merge]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: ba273465-1791-48a6-874d-a5fe4c228081

📥 Commits

Reviewing files that changed from the base of the PR and between 75ba798 and 267fc1b.

📒 Files selected for processing (5)

• contracts/OMN-9892.yaml
• drift/dod_receipts/OMN-9892/dod-001/command.yaml
• drift/dod_receipts/OMN-9892/dod-001/file_exists.yaml
• drift/dod_receipts/OMN-9892/dod-002/command.yaml
• drift/dod_receipts/OMN-9892/dod-002/file_exists.yaml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jonah/omn-9893-migrate-9892-receipts

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