diff --git a/.changeset/fierce-eagles-roam.md b/.changeset/fierce-eagles-roam.md
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+---
+type: Fixed
+pr: 0
+---
+**`validate health --backfill` now works without also passing `--repair`** — previously it silently did nothing unless `--repair` was also set, due to an unreachable internal gate.
diff --git a/.changeset/gallant-otters-fly.md b/.changeset/gallant-otters-fly.md
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index 000000000..69af1f431
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+---
+type: Changed
+pr: 0
+---
+**`validate health` splits two previously-conflated warning codes into their own codes** — W021 now covers only the phase-id-convention mismatch it originally meant; the STATE-vs-ROADMAP milestone-complete mismatch it used to also report moves to the new W026. Likewise W017 now covers only orphan worktrees; the stale-worktree case moves to the new W027.
diff --git a/.changeset/happy-jaguars-roar.md b/.changeset/happy-jaguars-roar.md
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index 000000000..9add7c2c1
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+++ b/.changeset/happy-jaguars-roar.md
@@ -0,0 +1,5 @@
+---
+type: Changed
+pr: 0
+---
+**`validate health --repair` no longer resets config.json or regenerates STATE.md automatically** — these two repairs are destructive (they lose custom settings or session history), so they're now reported with their fix described but never auto-applied; run the suggested command yourself to apply them.