fix: retire legacy command shims from default surface

legacy-command-shims/commands/devfleet.md

@@ -0,0 +1,23 @@
+---
+description: Legacy slash-entry shim for the claude-devfleet skill. Prefer the skill directly.
+---
+
+# DevFleet (Legacy Shim)
+
+Use this only if you still call `/devfleet`. The maintained workflow lives in `skills/claude-devfleet/SKILL.md`.
+
+## Canonical Surface
+
+- Prefer the `claude-devfleet` skill directly.
+- Keep this file only as a compatibility entry point while command-first usage is retired.
+
+## Arguments
+
+`$ARGUMENTS`
+
+## Delegation
+
+Apply the `claude-devfleet` skill.
+- Plan from the user's description, show the DAG, and get approval before dispatch unless the user already said to proceed.
+- Prefer polling status over blocking waits for long missions.
+- Report mission IDs, files changed, failures, and next steps from structured mission reports.