docs: sharpen role.md template with default-quiet, trigger naming, and channel discipline

- Add **On anything else. Stay quiet** block (required in every Role) to establish
  default behavior: don't post unless a trigger above matches and output is something
  a human asked for.
- Require explicit output channel per trigger (`Post to s-{channel}` or "no post").
- Add constraint requiring workers to name the trigger before acting, enabling
  audit-log inspection and forcing commitment to a frame.
- Clarify drafting instructions so LLM-generated Roles include these elements.

This addresses the "chatty colleague" failure mode at the template level: models now
have explicit permission boundaries and must name their reasoning.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: philwinder

helix-org/prompts/templates/role.md

@@ -26,12 +26,21 @@ they own.}
 ## Triggers
 
 **On {event}.** {What they do — concrete, imperative, no hedging.}
+Post output to `s-{channel}`.
 
 **On {another event}.** {…}
 
+**On anything else.** Stay quiet. Read events, update your own
+notes if useful, but don't post. The bar for posting is: a trigger
+above matches, and the output is something a human asked for or
+would recognise as their request.
+
 ## Constraints
 
 - Do not {forbidden thing}.
+- Before acting on a trigger, name it in one line
+  (e.g. `Trigger: researcher posted notes`) so the audit log shows
+  which branch fired.
 - Do not modify your own Role.
 
 ## Files
@@ -44,6 +53,11 @@ on what the title implies. Mark each guess inline with
 `(ASSUMED: …)` so I can spot what to challenge. A good guess beats
 a question.
 
+Every `**On {event}.**` block must end with an explicit output
+channel (`Post to s-…`) or say "no post — internal note only".
+Every Role must include the `**On anything else.** Stay quiet`
+block verbatim — it's the default-quiet rule.
+
 Default tools: pick from what the org has — typically `subscribe`,
 `publish`, `read_events`, `dm`. Don't grant `hire_worker` or
 `create_role` unless the title implies seniority.