eve/dist/src/public/instrumentation/index.d.ts

Filesystem-first framework for durable backend AI agents that run anywhere.

import type { ExactDefinition } from "#public/definitions/exact.js";
/**
 * Instrumentation authoring helpers for `agent/instrumentation.ts`.
 */
import type { ModelMessage, SystemModelMessage } from "ai";
import type { SessionAuthContext, SessionParent } from "#channel/types.js";
import type { InstrumentationChannel } from "#public/channels/index.js";
import type { JsonObject } from "#shared/json.js";
export { isChannel, type InstrumentationChannel, type InstrumentationChannelForChannel, type InstrumentationChannelForKind, type InstrumentationChannelKind, type InstrumentationChannelMetadata, } from "#public/channels/index.js";
/**
 * Context passed to the {@link InstrumentationDefinition.setup} callback.
 */
export interface InstrumentationSetupContext {
    /**
     * The agent name declared by `defineAgent`. Use as the `serviceName` for
     * `registerOTel` instead of a hard-coded string.
     */
    readonly agentName: string;
}
/**
 * User-authored runtime context values attached to AI SDK telemetry spans.
 *
 * Keys beginning with `eve.` are reserved for framework-owned context
 * and are ignored when returned from authored instrumentation.
 */
export type InstrumentationRuntimeContext = JsonObject;
/**
 * Session lineage and auth snapshot exposed to instrumentation callbacks.
 *
 * `auth.current` is the caller principal for this turn (null when the
 * request carried no credentials). `auth.initiator` is the principal that
 * started the root session, falling back to `auth.current` for root
 * sessions. `parent` is present only for delegated subagent sessions.
 */
export interface InstrumentationSession {
    readonly auth: {
        readonly current: SessionAuthContext | null;
        readonly initiator: SessionAuthContext | null;
    };
    readonly id: string;
    readonly parent?: SessionParent;
}
/**
 * Identifies the turn in progress when an instrumentation event fires.
 * `id` is the turn identifier; `sequence` is its zero-based position
 * within the session.
 */
export interface InstrumentationTurn {
    readonly id: string;
    readonly sequence: number;
}
/**
 * The step (model-call attempt) in progress for an instrumentation event.
 * `index` is the zero-based step index within the current turn.
 */
export interface InstrumentationStep {
    readonly index: number;
}
/**
 * Final model input assembled for one model-call attempt, snapshotted for
 * instrumentation. `instructions` is the resolved system prompt (a string,
 * a system message with provider options, or undefined when there is none).
 * `messages` is the non-system conversation passed to the model.
 */
export interface InstrumentationModelInput {
    readonly instructions: string | SystemModelMessage | undefined;
    readonly messages: readonly ModelMessage[];
}
/**
 * Input passed to `events["step.started"]`. eve runs the callback after
 * building the final model input for this attempt and before constructing
 * the AI SDK model call.
 */
export interface InstrumentationStepStartedEventInput {
    readonly channel: InstrumentationChannel;
    readonly modelInput: InstrumentationModelInput;
    readonly session: InstrumentationSession;
    readonly step: InstrumentationStep;
    readonly turn: InstrumentationTurn;
}
/**
 * Result of a `step.started` callback. eve merges `runtimeContext` into the
 * AI SDK telemetry span; child spans inherit the values. Keys beginning with
 * `eve.` and non-JSON-serializable values are dropped. Return `undefined` to
 * contribute no context.
 */
export interface InstrumentationStepStartedEventResult {
    /**
     * Additional runtime context merged into AI SDK telemetry spans.
     */
    readonly runtimeContext: InstrumentationRuntimeContext;
}
/**
 * Event hooks accepted by {@link defineInstrumentation}.
 */
export interface InstrumentationEvents {
    /**
     * Resolve per-attempt runtime context before the model call. The AI SDK
     * child spans inherit the returned values.
     */
    readonly "step.started"?: (input: InstrumentationStepStartedEventInput) => InstrumentationStepStartedEventResult | undefined;
}
/**
 * Authored instrumentation settings accepted by `defineInstrumentation`.
 *
 * The presence of a `defineInstrumentation` export implicitly enables
 * telemetry. There is no separate `isEnabled` toggle.
 */
export interface InstrumentationDefinition {
    /**
     * Override the function identifier attached to telemetry spans
     * (`ai.telemetry.functionId`). Defaults to the agent name; omitted when
     * neither is set.
     */
    readonly functionId?: string;
    /**
     * Instrumentation event hooks.
     */
    readonly events?: InstrumentationEvents;
    /**
     * Whether to record full model inputs in telemetry spans. Defaults to
     * `true` when `instrumentation.ts` is present. Set `false` for sensitive
     * inputs or to reduce span payload size.
     */
    readonly recordInputs?: boolean;
    /**
     * Whether to record full model outputs in telemetry spans. Defaults to
     * `true` when `instrumentation.ts` is present.
     */
    readonly recordOutputs?: boolean;
    /**
     * Setup callback invoked at server startup with the resolved agent name.
     * Use it to call `registerOTel` or other OTel provider setup;
     * `context.agentName` comes from `defineAgent`.
     */
    readonly setup?: (context: InstrumentationSetupContext) => void;
}
/**
 * Export the result as the default export of `agent/instrumentation.ts`. eve
 * reads these settings at server startup and applies them to every AI SDK
 * model call. The `setup` callback runs later with the resolved agent name,
 * not during `defineInstrumentation` itself.
 */
export declare function defineInstrumentation<T extends InstrumentationDefinition>(definition: ExactDefinition<T, InstrumentationDefinition>): T;