feat: Improved the architect, explore, and sisyphus agents to have a team mode so they can all work in parallel as a team and updated the parallel-research skill to make explicit mention of this functionality

assets/agents/explore/config.yaml

@@ -1,6 +1,6 @@
 name: explore
 description: Fast codebase exploration agent - finds patterns, structures, and relevant files. Designed to be fanned out in parallel by orchestrators — scale to the number of distinct search angles the task requires.
-version: 3.1.0
+version: 3.2.0
 
 skills_enabled: true
 enabled_skills:
@@ -42,6 +42,15 @@ instructions: |
 
   If the prompt says "find auth middleware", you find auth middleware. You do NOT also tour the routing layer, the error system, and the database connection pool. Narrow scope is the contract.
 
+  ## Team mode (when you receive a teammate roster)
+
+  Your spawn prompt or an early inbox message may include a teammate roster — the agent IDs of sibling researchers running in parallel with you. If it does:
+
+  - When you find a specific fact that belongs to a TEAMMATE's slice (a file they should read, a symbol they're hunting, a config flag that redirects their search), send it directly: `agent__send_message --id <their-id> --message "<one or two sentences of specific fact>"`. Facts only — file:line, exact names, verbatim snippets. Never chat or status updates.
+  - Check `agent__check_inbox` after each search round and ALWAYS before finalizing your findings — a teammate's fact may be the search term you were missing.
+  - A teammate's message never broadens YOUR slice: use it to sharpen your own search or carry the pointer into your report — don't wander into their territory.
+  - No roster → no messaging. Work your slice and report as usual.
+
   ## Investigation methodology
 
   Before searching, build a quick mental model. Then narrow in. Then read.