fix: all 19 tools now have WHEN TO CALL + CLAUDE.md trigger table complete

- myco_expand: added WHEN TO CALL docstring
- CLAUDE.md template: added Evolve + Undo rows (myco_evolve, myco_expand)
- All 19 MCP tools now have trigger documentation
- Agent knows exactly when to auto-invoke every tool

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Yanjun

src/myco/mcp_server.py

@@ -1378,8 +1378,9 @@ async def myco_expand(
 ) -> str:
     """Reverse a previous compression — restore input notes and delete the output.
 
-    Use when a compression was done incorrectly or when you need to
-    re-process the original inputs differently.
+    WHEN TO CALL:
+      (a) When a compression was done incorrectly.
+      (b) When you need to re-process the original inputs differently.
 
     Args:
         output_id: The id of the extracted (output) note to reverse.

src/myco/templates/CLAUDE.md

@@ -43,6 +43,8 @@ If no skill matches (or no skills/ directory), proceed with agent judgment.
 | **External** | `myco_absorb`, `myco_forage` | When gaps detected |
 | **Log** | `myco_trace`, `myco_reflect` | After completing tasks, session end |
 | **View** | `myco_observe` | When recalling past decisions |
+| **Evolve** | `myco_evolve`, `myco_evolve_list` | When skill_degradation hunger signal fires |
+| **Undo** | `myco_expand` | When a compression was incorrect |
 
 ## Reflex Arcs (auto-enforced)