[contursofran]

Fixes #753

What changed

• cmd/contr/hookflow.go: hash of the flow text and each profile's --model/--effort; last-seen hash per terminal in <state>/flow-seen/<terminal>.
• contr hook prompt and post-tool: on a change, a terminal with label contr.orchestrating or role orchestrator gets additionalContext "contr: the owner changed the flow and models in agents.json; follow these from now on." + flow + one line per profile. hc is dialed only after a change. Workers (CONTR_COORDINATOR set) are skipped.
• session-start (startup and compact) records the hash, so the first prompt says nothing. With no saved hash, the hook only saves one.
• Errors are logged to stderr; the hooks still exit 0.
• agents.Profile.Model() / Effort(); D293 in docs/DECISIONS.md.

Pre-check

1. Tests: hookflow_test.go covers no change, a flow change, a model change, a non-coordinator terminal and a worker, and a bad file. With the change undone, these failed: ChangeReachesCoordinator and ModelChangeReachesPrompt (no context; startup record removed; label check removed), SkipsOtherTerminals (coordinator check forced true), NoChangeSaysNothing (hash compare broken), BadFileIsLogged (error swallowed).
2. Plan: every point in the brief is done.
3. Contract: the message text matches the brief word for word.
4. Up to date: no new commits on main. No open PRs touch these files.
5. Diff: I read it. No debug output or unrelated changes are left.
6. Coverage: every point in the issue is done.
7. Duties: no code was removed. The prompt hook still gives youContext, and only appends the flow text after it.
8. Evidence: no UI change. scripts/check.sh passes.