Crate codex_extension_api

Structs§

ExtensionData: Typed extension-owned data attached to one host object.
ExtensionRegistry: Immutable typed registry produced after extensions are installed.
ExtensionRegistryBuilder: Mutable registry used while hosts register typed runtime contributions.
JsonToolOutput
NoopExtensionEventSink: Event sink used when the host does not expose extension event emission.
PromptFragment
ResponsesApiTool
ThreadResumeInput: Input supplied when the host resumes an existing thread.
ThreadStartInput: Input supplied when the host starts a runtime for a thread.
ThreadStopInput: Input supplied when the host stops a thread runtime.
ToolCall
ToolFinishInput: Input supplied when the host finishes executing one tool call.
ToolName: Identifies a callable tool, preserving the namespace split when the model provides one.
ToolStartInput: Input supplied when the host starts executing one tool call.
TurnAbortInput: Input supplied when the host aborts a turn.
TurnStartInput: Input supplied when the host starts a turn.
TurnStopInput: Input supplied when the host completes a turn.

FunctionCallError: Error returned while executing a model-visible tool invocation.
PromptSlot
ToolCallOutcome: Extension-facing outcome for a finished tool call.
ToolCallSource: Host-visible source for a model tool call.
ToolPayload: Canonical payload shapes accepted by model-visible tool runtimes.
ToolSpec: When serialized as JSON, this produces a valid “Tool” in the OpenAI Responses API.

AgentSpawner: Constructor-injected host helper for extensions that need to spawn subagents.
ApprovalReviewContributor: Extension contribution that can claim rendered approval-review prompts.
ConfigContributor: Contributor for host-owned configuration changes.
ContextContributor: Extension contribution that adds prompt fragments during prompt assembly.
ExtensionEventSink: Host-provided fire-and-forget sink for extension-generated events.
ThreadLifecycleContributor: Contributor for host-owned thread lifecycle gates.
TokenUsageContributor: Contributor for token usage checkpoints reported by the model provider.
ToolContributor: Extension contribution that exposes native tools owned by a feature.
ToolExecutor: Shared runtime contract for model-visible tools.
ToolLifecycleContributor: Contributor for host-owned tool lifecycle gates.
ToolOutput: Model-facing output contract returned by executable tool runtimes.
TurnItemContributor: Ordered post-processing contribution for one parsed turn item.
TurnLifecycleContributor: Contributor for host-owned turn lifecycle gates.

empty_extension_registry: Creates an empty shared registry for hosts that do not register contributions.
parse_tool_input_schema: Parse the tool input_schema or return an error for invalid schema.