Struct NoopExtension 

pub struct NoopExtension;

pub.

Trait Implementations

impl Extension for NoopExtension

fn name(&self) -> &str

Returns the extension’s unique identifier.

fn description(&self) -> &str

Returns a human-readable description of what this extension does.

fn manifest(&self) -> ExtensionManifest

Returns the extension manifest containing metadata and permissions. Default implementation constructs a minimal manifest from name() and description().

fn register_tools(&self) -> Vec<Arc<dyn AgentTool>>

Registers custom tools exposed by this extension. Each returned tool becomes available to the agent at runtime. Default returns an empty vector (no custom tools).

fn register_commands(&self) -> Vec<Command>

Registers slash commands exposed by this extension. Each returned command becomes available as /<name> in the input field. Default returns an empty vector (no custom commands).

fn on_load(&self, _ctx: &ExtensionContext)

Called once when the extension is first loaded into a session. Use this to initialize resources, read config, or register with external services.

fn on_unload(&self)

Called once when the extension is unloaded or the session ends. Use this to clean up resources allocated in on_load().

fn on_message_sent(&self, _msg: &str)

Called after the agent sends a message to the LLM. _msg is the raw message content string.

fn on_message_received(&self, _msg: &str)

Called after receiving a response from the LLM. _msg is the raw response content string.

fn on_tool_call(&self, _tool: &str, _params: &Value)

Called immediately before a tool is executed. _tool is the tool name and _params are the JSON arguments.

fn on_tool_result(&self, _tool: &str, _result: &AgentToolResult)

Called immediately after a tool execution completes. _tool is the tool name and _result contains the output or error.

fn on_session_start(&self, _session_id: &str)

Called when a new session starts. _session_id uniquely identifies the session.

fn on_session_end(&self, _session_id: &str)

Called when a session ends. _session_id uniquely identifies the session that ended.

fn on_settings_changed(&self, _settings: &Settings)

Called whenever the user saves or updates settings.

fn on_event(&self, _event: &AgentEvent)

Catch-all hook for any agent event not covered by a specific method.

fn on_before_tool_call(&self, _tool: &str, _args: &Value) -> Result<(), Error>

Called before a tool is executed. Return Err to block the tool call.

fn on_after_tool_call( &self, _tool: &str, _result: &AgentToolResult, ) -> Result<(), Error>

Called after a tool completes. Return Err to surface an error to the agent.

fn on_before_compaction(&self, _ctx: &CompactionContext) -> Result<(), Error>

Called before the context window is compacted. Return Err to abort compaction.

fn on_after_compaction(&self, _summary: &str) -> Result<(), Error>

Called after the context window is compacted with the generated summary.

fn on_error(&self, _error: &Error) -> Result<(), Error>

Called when any error occurs in the agent loop.

fn session_before_switch( &self, _event: &SessionBeforeSwitchEvent, ) -> Result<(), Error>

Called before the active session switches to a different branch or parent.

fn session_before_fork( &self, _event: &SessionBeforeForkEvent, ) -> Result<(), Error>

Called before a session is forked (branched) into a new subtree.

fn session_before_compact( &self, _event: &SessionBeforeCompactEvent, ) -> Result<(), Error>

Called before the context window is compacted.

fn session_compact(&self, _event: &SessionCompactEvent) -> Result<(), Error>

Called when the context window is being compacted.

fn session_shutdown(&self, _event: &SessionShutdownEvent)

Called when a session is shutting down.

fn session_before_tree( &self, _event: &SessionBeforeTreeEvent, ) -> Result<(), Error>

Called before a tree navigation action (branch listing, traversal, etc.).

fn session_tree(&self, _event: &SessionTreeEvent)

Called during a tree navigation action.

fn context(&self, _event: &mut ContextEvent) -> Result<(), Error>

Emits into the agent context. Return Err to signal that the event was handled.

fn before_provider_request( &self, _event: &mut BeforeProviderRequestEvent, ) -> Result<(), Error>

Called before every LLM provider request. Allows the extension to mutate the request parameters (model, temperature, tools, etc.).

fn after_provider_response( &self, _event: &AfterProviderResponseEvent, ) -> Result<(), Error>

Called after every LLM provider response. Allows the extension to read or annotate the response before it is processed by the agent loop.

fn model_select(&self, _event: &ModelSelectEvent)

Called when the user or agent selects a model (via /model or auto-routing).

fn thinking_level_select(&self, _event: &ThinkingLevelSelectEvent)

Called when the thinking level is changed.

fn bash(&self, _event: &BashEvent)

Called when a bash command is about to be executed.

fn input(&self, _event: &InputEvent) -> InputEventResult

Called for every user input keystroke. Return InputEventResult::Handled to suppress the default input handling, or InputEventResult::Transform { text } to replace the input text.

fn register_shortcuts(&self) -> Vec<ExtensionShortcut>

Registers keyboard shortcuts exposed by this extension. Default returns an empty vector (no shortcuts).