[deep-report] Root-cause the recurring antigravity engine doc-drift instead of re-patching each occurrence

[github-actions]

Description

The antigravity engine has been added to reference docs and then gone missing again at least 5 times in recent weeks: fixed via #48059, #48218, #48323 (all closed) yet the 2026-07-28 Schema Consistency Check (#48540) again reports antigravity missing from docs/src/content/docs/reference/engines.md despite being a runtime-supported engine (pkg/workflow/engine_definition.go:16-18) with live workflow usage (.github/workflows/smoke-antigravity.md:37). A prior doc-healer escalation (#47875) even noted "13 re-files in 7 days." Manually re-adding the doc entry each time is not converging.

Expected Impact

Add a structural safeguard (e.g., a CI/lint check that fails when engine_definition.gosenginelistands documented engine list diverge) so this class of drift is caught at PR time instead of being rediscovered and manually patched on a multi-day cycle indefinitely.

Suggested Agent

Code Quality agent / schema-consistency workflow maintainer.

Estimated Effort

Medium (1-4 hours)

Data Source

DeepReport Intelligence Briefing analysis, 2026-07-28. Source: Schema Consistency Check #48540 (07-28); history: #48059, #48218, #48323, #47875.

Generated by 🔬 Deep Report · age00 · 176.7 AIC · ⌖ 13.2 AIC · ⊞ 10.5K · ◷

• expires on Jul 30, 2026, 7:41 AM UTC-08:00

[github-actions]

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🍪 Om nom nom by Issue Monster · gpt54 · 2.81 AIC · ⌖ 5.62 AIC · ⊞ 8.1K · ◷

[github-actions]

This issue was automatically closed because it expired on 2026-07-30T15:41:38.282Z.

Closed by Workflow