docs: update README for V2-only, remove V1 references

README.md

@@ -1,6 +1,6 @@
 # opencode-matrix-plugin
 
-OpenCode plugin that connects your OpenCode agent to Matrix messaging servers. Supports both V1 (SDK) and V2 (full context) APIs.
+OpenCode V2 plugin that connects your OpenCode agent to Matrix messaging servers.
 
 ## Features
 
@@ -14,17 +14,16 @@ OpenCode plugin that connects your OpenCode agent to Matrix messaging servers. S
 - **Rate Limiting**: Configurable per-user rate limiting
 - **User Allowlisting**: Restrict who can interact with the bot
 - **Session Persistence**: Sessions survive plugin reloads via `~/.opencode-matrix-sessions.json`
-- **V1/V2 Dual Support**: Works with OpenCode 1.18.x (V1 SDK) and V2 (full context)
 
 ## Installation
 
 ### Option 1: Local Plugin (Recommended)
 
-1. Copy this plugin directory into your OpenCode config:
+1. Create a symlink from your OpenCode config to this plugin:
 
 ```bash
 mkdir -p ~/.config/opencode/plugins
-cp -r ./plugins/matrix-plugin ~/.config/opencode/plugins/
+ln -s /path/to/your/opencode_matrix ~/.config/opencode/plugins/matrix-plugin
 ```
 
 2. Add the plugin to your `opencode.jsonc`:
@@ -37,11 +36,14 @@ cp -r ./plugins/matrix-plugin ~/.config/opencode/plugins/
 }
 ```
 
-### Option 2: Symlink
+### Option 2: Published Package
 
-```bash
-mkdir -p ~/.config/opencode/plugins
-ln -s /path/to/your/project/plugins/matrix-plugin ~/.config/opencode/plugins/matrix-plugin
+```jsonc
+{
+  "plugins": [
+    "opencode-matrix-plugin"
+  ]
+}
 ```
 
 ## Configuration
@@ -200,15 +202,13 @@ MatrixBotClient (matrix-bot-sdk + Rust crypto)
 SessionManager
     │
     ├── Rate limiting
-    ├── Event deduplication
     ├── Thread isolation (room:threadId)
     └── Session persistence (~/.opencode-matrix-sessions.json)
     │
     ▼
-OpenCode API
+OpenCode V2 API
     │
-    ├── V2: ctx.session.prompt() / ctx.session.create()
-    ├── V1: sdkClient.session.prompt() / sdkClient.session.create()
+    ├── ctx.session.prompt() / ctx.session.create()
     └── Session mapping: Matrix thread → OpenCode session
     │
     ▼
@@ -219,8 +219,7 @@ Response → MatrixBotClient → Matrix Room
 
 Sessions are persisted across plugin restarts in `~/.opencode-matrix-sessions.json`.
 
-- **V1 API**: Sessions are created with auto-generated IDs, mapped via JSON file
-- **V2 API**: Sessions can be created with custom deterministic IDs (no map needed)
+- **V2 API**: Sessions are created with deterministic IDs (`roomId:threadRootId`)
 - **Sync**: Use `sessionManager.syncWithOpenCode(sessionIds)` to prune orphaned sessions
 
 ## Security
@@ -229,7 +228,7 @@ Sessions are persisted across plugin restarts in `~/.opencode-matrix-sessions.js
 - **Token Storage**: Access tokens saved with `0o600` permissions
 - **User Allowlisting**: Restrict bot access to specific users
 - **Rate Limiting**: Prevent message spam
-- **Event Deduplication**: Prevent processing duplicate events
+- **Mutex Lock**: Prevents duplicate bot startup (server + client both load plugins)
 
 ## Troubleshooting
 
@@ -239,7 +238,7 @@ Sessions are persisted across plugin restarts in `~/.opencode-matrix-sessions.js
 2. Verify the trigger pattern matches your message
 3. Check if the user is in the allowed list (if configured)
 4. Check `~/.local/share/opencode-matrix-bot/` for state files
-5. Enable debug logging: `BRIDGE_DEBUG=1 opencode`
+5. Check logs: `~/.opencode-matrix-plugin/plugin.log`
 
 ### Authentication fails
 
@@ -254,10 +253,14 @@ Sessions are persisted across plugin restarts in `~/.opencode-matrix-sessions.js
 2. Check crypto storage directory has write permissions
 3. Verify the bot has access to the encrypted room
 
+### Double bot startup
+
+OpenCode V2 loads plugins in both the background server and the client. The plugin uses a file-based mutex (`~/.local/share/opencode-matrix-bot/plugin-data/lock`) to prevent duplicate bot instances. If you see two bots, check that the lock file is being created.
+
 ## Development
 
 ```bash
-cd plugins/matrix-plugin
+cd /path/to/opencode_matrix
 bun install
 bun run typecheck
 bun run build