fix: stop hook schema, uninstall cleanup, and README architecture note

- Fix session-stop.sh in 0.1.0 cache to use systemMessage instead of
  hookSpecificOutput (Stop hook schema doesn't support hookSpecificOutput)
- Remove debug scaffolding from post-tool-use.py
- Installer: pre-create hook_debug.log so sandbox can write to it;
  uninstall now removes marketplace plugin symlink
- README: clarify extension vs mod architecture, fix cache path in
  install description

README.md

@@ -1,9 +1,11 @@
 # 🐾 Buddymon
 
-A Claude Code plugin that turns your coding sessions into a creature-collecting game.
+A Claude Code **extension** that turns your coding sessions into a creature-collecting game.
 
 Buddymon are discovered, caught, and leveled up through real development work — not separate from it.
 
+> **How it works:** Buddymon uses Claude Code's hook and plugin system — it is not a UI mod. Notifications (encounters, XP, session summaries) appear as system-injected context in the chat thread. They are visible to Claude and displayed in the conversation, but do not appear in a separate UI widget. This is a deliberate constraint of CC's extension API.
+
 ---
 
 ## What it does
@@ -40,8 +42,9 @@ Then **restart Claude Code** and run:
 ```
 
 The install script:
-- Symlinks the repo into `~/.claude/plugins/cache/local/buddymon/0.1.0/`
-- Registers the plugin in `~/.claude/plugins/installed_plugins.json`
+- Creates a local `circuitforge` marketplace under `~/.claude/plugins/marketplaces/circuitforge/` (required — CC validates plugin names against the marketplace index)
+- Symlinks the repo into `~/.claude/plugins/cache/circuitforge/buddymon/<version>/`
+- Registers the plugin in `~/.claude/plugins/installed_plugins.json` and `~/.claude/plugins/known_marketplaces.json`
 - Enables it in `~/.claude/settings.json`
 - Creates `~/.claude/buddymon/` state directory with initial JSON files
 

hooks-handlers/post-tool-use.py

@@ -18,6 +18,7 @@ import re
 import sys
 import random
 from pathlib import Path
+from datetime import datetime
 
 PLUGIN_ROOT = os.environ.get("CLAUDE_PLUGIN_ROOT", str(Path(__file__).parent.parent))
 BUDDYMON_DIR = Path.home() / ".claude" / "buddymon"
@@ -280,9 +281,22 @@ def main():
     if tool_name == "Bash":
         output = ""
         if isinstance(tool_response, dict):
-            output = tool_response.get("output", "") or tool_response.get("content", "")
+            # CC may use any of these keys; combine all text fields
+            parts = [
+                tool_response.get("output", ""),
+                tool_response.get("content", ""),
+                tool_response.get("stderr", ""),
+                tool_response.get("text", ""),
+            ]
+            output = "\n".join(p for p in parts if isinstance(p, str) and p)
         elif isinstance(tool_response, str):
             output = tool_response
+        elif isinstance(tool_response, list):
+            # Array of content blocks: [{"type": "text", "text": "..."}]
+            output = "\n".join(
+                b.get("text", "") for b in tool_response
+                if isinstance(b, dict) and b.get("type") == "text"
+            )
 
         existing = get_active_encounter()
 

install.sh

@@ -96,6 +96,13 @@ if '${MARKETPLACE}' in d:
 PYEOF
     fi
 
+    # Remove marketplace plugin symlink (leave marketplace dir in case other CF plugins exist)
+    MARKETPLACE_PLUGIN_LINK="${PLUGINS_DIR}/marketplaces/${MARKETPLACE}/plugins/${PLUGIN_NAME}"
+    if [[ -L "${MARKETPLACE_PLUGIN_LINK}" ]]; then
+        rm "${MARKETPLACE_PLUGIN_LINK}"
+        ok "Removed marketplace plugin symlink"
+    fi
+
     echo ""
     echo "✓  ${PLUGIN_KEY} uninstalled. Restart Claude Code to apply."
 }
@@ -263,6 +270,12 @@ for name, default in files.items():
         print(f"   Created {name}")
     else:
         print(f"   {name} already exists — kept")
+
+# Pre-create hook_debug.log so the hook sandbox can write to it
+log_path = os.path.join(d, 'hook_debug.log')
+if not os.path.exists(log_path):
+    open(log_path, 'w').close()
+    print("   Created hook_debug.log")
 PYEOF
 
     echo ""