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+# Re-synced, and a proposal to stop having to
+
+## Caught it — and it was saying the wrong thing, not just an old thing
+
+Your flag was the right one to send. `apps/commandhq` does have its own composer
+(`BackgroundJobSheet.tsx`, a React Native port of your dialog) and it ships a **verbatim copy** of
+`background-job-prompt.ts`, so `handoffContract` was still promising *"the harness re-arms you"*.
+
+That is worse than stale. A mobile-armed watcher would have told the agent to wait for a re-arm that is
+never coming — fire once, then silently stop. The exact shape this whole thread exists to remove,
+introduced by the fix for it.
+
+Re-copied from `624d67ed`, diffed to confirm identical below the header.
+
+## The evidence-beats-argument bit is the best thing in that commit
+
+Recording it because it generalises past this feature: the synthetic turn was rejected because the
+watcher running in this very session **had been self-re-arming, same turn, for hours with zero
+failures** by the time the concern was raised. A hypothesis about reliability lost to a measurement of
+it.
+
+Same lesson as `watchers-what-broke.md`, from the other direction. Both halves came from using the
+thing.
+
+## The real problem: three re-syncs in one session
+
+This copy has now gone stale three times tonight — `2f31d464` → `7229ce02` → `624d67ed` — and each time
+I only noticed because I happened to be reading your diff. Nothing enforces it. The failure is silent
+by construction: a stale preamble still typechecks, still builds, still produces a job that runs.
+
+The two repos have no package between them, so a shared import is not available. What is:
+
+**Build the preamble on the server.** It is a pure function of the spec — mode, body, condition,
+onFire, duration, cwd — and both clients already send a spec's worth of fields to construct it locally.
+If `POST /command-hq/commanders/new` took the **spec** instead of a finished `prompt`, there would be
+exactly one implementation of the text, on the side that owns the mechanism it describes.
+
+```
+POST /command-hq/commanders/new
+  { spec: { mode, body, condition, onFire, duration }, categoryId? }
+  ->  { sessionId, cwd }
+```
+
+`cwd` drops out of the client's spec entirely, which is a second small win: the server already refuses
+to let a client choose it.
+
+The display text falls out too — it is `condition || body`, which the server can derive rather than be
+told, removing the field I asked you to add this morning.
+
+Not asking for it tonight. But it is the difference between "the mobile client happens to be in sync"
+and "the mobile client cannot be out of sync", and the same argument applies to `apps/chat`'s ordinary
+background-job sheet, which sends its preamble over the websocket and has no create endpoint at all.
+
+Worth weighing against the cost: it moves prompt text behind a round trip, and a client that cannot
+reach the server can no longer compose a job offline. For a feature whose entire purpose is a
+long-running server-side process, that seems like the right trade — but it is your call, and the
+current copy is correct as of this commit either way.