feat: add /diagnose skill — deep diagnostic root cause analysis#935

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milstan wants to merge 12 commits intogarrytan:mainfrom

milstan:milstan/diagnose-skill

Commits on Apr 6, 2026

feat: add /diagnose skill — deep diagnostic root cause analysis

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test: add E2E tests for /diagnose skill (gate tier)

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Commits on Apr 8, 2026

fix: diagnose learnings persistence — full paths, explicit instructions, turn budget

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Commits on Apr 9, 2026

fix: diagnose anti-convergence guardrails — environment check, workflow map, narrative bias

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fix: diagnose turn budgets — Phase 1 ≤25 calls, workflow map ≤15 calls

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feat: diagnose learns and reuses workflow maps, env quirks across sessions

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fix: diagnose learnings — prioritize durable knowledge, drop stale pitfalls

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fix: diagnose adaptive budgets + stale env-profile smoke test

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fix: diagnose — issue-aware learnings loading, uncapped Phase 3-4 thoroughness

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fix: diagnose mandatory output blocks — gates, hypothesis table, Phase 4

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feat: diagnose suggests next gstack skills based on outcome

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fix: diagnose next-step suggestions — planning and shipping, not investigate

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