chore(routing): pre-merge cleanup — Plan 7 reminders, code_review→review, operator note

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

DECISIONS.md

@@ -67,6 +67,31 @@ Record *why* things are the way they are. Future-you will thank present-you.
 
 ---
 
+## Plan 6: routing pod reuses internal/skills/{review,debug,retrospective,trainer}
+
+Plan 6 (Mode 2 routing pod, 2026-05-04) introduces a second consumer of
+the four cost-routable skill packages. The routing pod constructs each
+skill via `<pkg>.New(Config{...})` and hands it `routing.Router.Run` as
+the `CompleteFunc`. Plan 7 (supervisor retirement) MUST NOT delete the
+four packages.
+
+**Plan 7's allowed deletions:**
+- `internal/skills/{tdd,spec,tier}/` (not consumed by the routing pod)
+- `cmd/supervisor/` (binary)
+- `Dockerfile` (supervisor's, at repo root — distinct from `Dockerfile.routing`)
+- supervisor manifests in the infra repo
+- NodePort `:30320`
+
+**Plan 7's preserved code:**
+- `internal/skills/{review,debug,retrospective,trainer}/`
+- `internal/registry`
+- `internal/mcp`
+- `internal/exec/litellm.go`
+- `internal/routing/` (entirely new in Plan 6)
+- `cmd/routing/`
+
+---
+
 ## 2026-04-08 — Mistral Vibe gets its own adapter
 
 **Context**: Vibe doesn't read `AGENTS.md` — it uses `~/.vibe/prompts/` and `~/.vibe/agents/` with TOML config.