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    CompositeUiPort

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    pub(all) struct CompositeUiPort {
      contributors : Array[&
    UiPort    ]
    }

    Fan-out UiPort: render delivers to every contributor; request tries each in order, first non-Unsupported wins.

    CompositeUiPort::CompositeUiPort

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    CompositeUiPort::contributors

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    CompositeUiPort::render

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    CompositeUiPort::request

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    CompositeUiPort::ui_descriptor

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    NoopLifecycle

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    pub(all) struct NoopLifecycle {
    }

    NoopLifecycle::on_compose

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    NoopLifecycle::on_shutdown

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    async fn NoopLifecycle::on_shutdown(_self : NoopLifecycle) -> Unit

    NoopLifecycle::on_start

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    async fn NoopLifecycle::on_start(_self : NoopLifecycle) -> Unit

    NoopUiPort

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    pub(all) struct NoopUiPort {
    }

    Default UiPort for headless hosts. request raises Unsupported.

    NoopUiPort::NoopUiPort

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    fn NoopUiPort::NoopUiPort() -> NoopUiPort

    NoopUiPort::render

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    fn NoopUiPort::render(_self : NoopUiPort, _intent : 
    UiRender    ) -> Unit

    NoopUiPort::request

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    NoopUiPort::ui_descriptor

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    SystemPromptHook

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    pub(all) struct SystemPromptHook {
      base_prompt : String
      contributors : Array[SystemPromptSection]
      assembled : String?
    }

    Combines a fixed base prompt with contributor sections and prepends the result as a single System message at index 0. Empty sections are skipped.

    The assembled prompt is cached lazily on the first call to before_model. Laziness matters because extension Lifecycle::on_start callbacks run inside the first run_single_turn but before the first before_model, so contributors whose state is initialized in on_start must be read after that point. After caching, the text is frozen for the lifetime of the hook.

    SystemPromptHook::SystemPromptHook

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    fn SystemPromptHook::SystemPromptHook(base_prompt~ : String, contributors~ : Array[SystemPromptSection]) -> SystemPromptHook

    SystemPromptHook::assemble

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    fn SystemPromptHook::assemble(self : SystemPromptHook) -> String

    Assemble base + non-empty contributor sections with id: headers. Sections are separated by a blank line (\n\n). The result is empty when the base prompt and every contributor return empty strings.

    SystemPromptHook::before_model

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    SystemPromptHook::before_tool

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    SystemPromptHook::on_post_event

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    SystemPromptHook::on_turn_begin

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    async fn SystemPromptHook::on_turn_begin(_self : SystemPromptHook) -> Unit

    SystemPromptHook::on_turn_end

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    async fn SystemPromptHook::on_turn_end(_self : SystemPromptHook) -> Unit

    SystemPromptHook::tool_exposure

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    SystemPromptSection

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    pub(all) struct SystemPromptSection {
      id : String
      contributor : &
    SystemPromptContributor
    }

    A contributor entry: manifest id (for section header) and the contributor.

    SystemPromptSection::SystemPromptSection

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    ToolRegistry

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    Dynamic runtime tool registration. Implements ToolProvider.

    ToolRegistry::ToolRegistry

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    fn ToolRegistry::ToolRegistry() -> ToolRegistry

    ToolRegistry::execute

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    ToolRegistry::list_tools

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    ToolRegistry::register

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    Register (or deliberately replace) a tool at runtime. Re-registering an existing name overwrites both the definition and the executor — that is intentional hot-replacement semantics for dynamic registries. Callers that did NOT mean to replace should use register_strict, which fails fast on a name collision instead of silently shadowing the prior tool.

    ToolRegistry::register_strict

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    Register a tool, failing fast with RuntimeError::ToolAlreadyRegistered when the name is already taken. This mirrors the composition-time rule: a name collision is never silently resolved by last-wins.

    ToolRegistry::unregister

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    fn ToolRegistry::unregister(self : ToolRegistry, name : String) -> Unit

    UiRenderHook

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    pub(all) struct UiRenderHook {
      ui : &
    UiPort
    }

    UiRenderHook: PipelineHook (on_post_event) that projects events into UI render intents. Non-raising by contract (both PipelineHook::on_post_event and UiPort::render are non-raising), so there is nothing to propagate.

    UiRenderHook::UiRenderHook

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    UiRenderHook::before_model

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    UiRenderHook::before_tool

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    UiRenderHook::on_post_event

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    async fn UiRenderHook::on_post_event(self : UiRenderHook, _scope : 
    EventScope    ?, stage : 
    HookStage    ) -> Unit noraise

    UiRenderHook::on_turn_begin

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    async fn UiRenderHook::on_turn_begin(_self : UiRenderHook) -> Unit

    UiRenderHook::on_turn_end

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    async fn UiRenderHook::on_turn_end(_self : UiRenderHook) -> Unit

    UiRenderHook::tool_exposure

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    parse_slash_args

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    fn parse_slash_args(text : String, params : Array[
    CommandParam    ]) -> Result[
    Json    , String]

    Parse a slash argument string into a JSON object according to CommandParam definitions. Positional params fill in declaration order; non-positional params expect key=value form. Applies defaults for missing optional params. Returns Err with a reason string on type conversion failure or missing required params. Pure function (no IO).

    validate_args

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    Validate a JSON object of args against a CommandDef's params. Checks required presence; optional params with no value and no default are omitted (not an error). Returns the (possibly defaulted) args on Ok. Pure function (no IO).

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