docs(agent): mark coordination API experimental

plugins/codeman/skills/codeman/SKILL.md

@@ -30,7 +30,7 @@ through: the verbs in detail (the old §5) in [reference/verbs.md](reference/ver
 worked multi-worker flows in [reference/recipes.md](reference/recipes.md), endpoint
 tables and a symptom gallery in [reference/endpoints.md](reference/endpoints.md), and
 direct messaging to claude workers in [reference/messaging.md](reference/messaging.md).
-Bounded inspection and guarded stage/submit load only when needed from
+Experimental bounded inspection and guarded stage/submit load only when needed from
 [reference/inspection-and-staging.md](reference/inspection-and-staging.md).
 
 This skill works the same whichever CLI you are: Codeman puts it where each CLI looks

plugins/codeman/skills/codeman/reference/inspection-and-staging.md

@@ -1,4 +1,11 @@
-# Bounded inspection and guarded submission
+# Experimental bounded inspection and guarded submission
+
+**Experimental:** `codeman agent inspect`, `stage` and `submit`, and their
+`/api/v1/sessions/:id/inspect|stage|submit` routes (including `/api` aliases),
+are excluded from the stable CLI/HTTP contract. Their commands, flags, paths,
+payloads and behavior may change or be removed in a minor or patch release.
+Pin a compatible Codeman version when automating them. Authentication and
+session ownership checks still apply.
 
 Use these commands inside a Codeman session. They use its authenticated HTTP API.
 They supplement `send`, `wait` and `read` over the same HTTP transport; no direct

plugins/codeman/skills/codeman/reference/verbs.md

@@ -814,7 +814,10 @@ Rules that matter:
 - **Lifetime.** An inbox goes with its session on delete. A server restart empties all
   inboxes unless the user turned on *Keep agent inbox across restarts* in Settings.
 
-## Bounded inspection and guarded submission
+## Experimental bounded inspection and guarded submission
+
+These three commands and their HTTP routes may change or be removed in minor or
+patch releases; they are excluded from the stable CLI/HTTP contract.
 
 Use `codeman agent inspect` for bounded evidence and incremental local Codex cursors.
 Use `codeman agent stage --message-file` followed by one hash-confirmed