intercept any line starting with / before sending it to the agent inbox.
two commands today:
- /help — render command list locally
- /clear — wipe the local terminal view (server-side event history kept,
so a page reload restores it)
unknown /xxx surfaces an error row instead of being silently sent. tab
on a /prefix cycles through matching command names. submit-hint
mentions /help so the operator can discover it.
scaffolding for the bigger commands (/compact /cancel /model) is in
place — adding them later is a switch arm plus harness work.
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