fix: rename save_memory and fix MCP search instructions + startup hook (#1210)

* fix: rename save_memory to save_observation and fix MCP search instructions

Stop the primary agent from proactively saving memories by renaming
save_memory to save_observation with a neutral description. Remove
"Saving Memories" section from SKILL.md. Update context formatters
and output styles to reference the mem-search skill instead of raw
MCP tool names.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: split SessionStart hooks so smart-install failure doesn't block worker start

smart-install.js and worker-start were in the same hook group, so if
smart-install exited non-zero the worker never started. Split into
separate hook groups so they run independently.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: worker startup waits for readiness before hooks fire

Move initializationCompleteFlag to set after DB/search init (not MCP),
add waitForReadiness() polling /api/readiness, and extract shared
pollEndpointUntilOk helper to DRY up health/readiness checks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

plugin/hooks/hooks.json

@@ -21,7 +21,12 @@
             "type": "command",
             "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/smart-install.js\"",
             "timeout": 300
-          },
+          }
+        ]
+      },
+      {
+        "matcher": "startup|clear|compact",
+        "hooks": [
           {
             "type": "command",
             "command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/bun-runner.js\" \"${CLAUDE_PLUGIN_ROOT}/scripts/worker-service.cjs\" start",

plugin/skills/mem-search/SKILL.md

@@ -93,20 +93,6 @@ get_observations(ids=[11131, 10942])
 
 **Returns:** Complete observation objects with title, subtitle, narrative, facts, concepts, files (~500-1000 tokens each)
 
-## Saving Memories
-
-Use the `save_memory` MCP tool to store manual observations:
-
-```
-save_memory(text="Important discovery about the auth system", title="Auth Architecture", project="my-project")
-```
-
-**Parameters:**
-
-- `text` (string, required) - Content to remember
-- `title` (string, optional) - Short title, auto-generated if omitted
-- `project` (string, optional) - Project name, defaults to "claude-mem"
-
 ## Examples
 
 **Find recent bug fixes:**