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SKILLS/10-definition-of-done.md

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+# Definition of Done (DoD)
+
+A change is "done" only when:
+
+## Code correctness
+- Builds successfully (if applicable)
+- Tests pass
+- Linting/formatting passes
+- Types/checks pass (if applicable)
+
+## Quality
+- No new warnings introduced
+- Edge cases handled (inputs validated, errors meaningful)
+- Hot paths not regressed (if applicable)
+
+## Hygiene
+- No secrets committed
+- Docs updated if behavior or usage changed
+- PR summary includes verification steps
+
+## Commands
+- macOS/Linux: `./scripts/dod.sh`
+- Windows: `\scripts\dod.ps1`