{
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  "body": "## Spec\nSpec-ID: simulation-semantics-version-contract\n[specs/simulation-semantics-version-contract.md](specs/simulation-semantics-version-contract.md)\n\n## Summary\nImplements the `simulation-semantics-version-contract` spec.\n\n## Review\nReview-Owner: local\n\n## Acceptance Criteria\n- [ ] One backend version manifest owns `assumptions_version`, its effective timestamp, and a\n- [ ] Every newly enqueued simulation, sweep, grid, comparison, and deterministic replay that\n- [ ] Responses add `assumptions_version_state` with exact values `declared` or\n- [ ] Runs from the known ambiguous `2026-06-23.v1` production window are not silently certified.\n- [ ] Non-compute derivations\u2014creating a share, saving a scenario from a run, copying an existing\n- [ ] `get_supported_inputs` returns the current manifest version, effective timestamp, and change\n- [ ] A documented CI guard covers the governed semantic modules and registries and fails when\n\n## Known Issues\nNone.\n",
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  "created_at": "2026-08-12T00:05:46Z",
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  "merged_at": "2026-08-12T03:06:56Z",
  "number": 1074,
  "repository_visibility": "private",
  "title": "Spec: simulation-semantics-version-contract"
}