/**
 * SessionStart hook event.
 *
 * Fires when a Claude Code session begins, resumes, is cleared, or
 * compacts. Does not carry `permission_mode`. The primary use-case is
 * injecting repo-specific context via `addContext`. Supports a matcher
 * on `source`. See https://code.claude.com/docs/en/hooks#sessionstart.
 *
 * @since 0.1.0
 */
import * as Effect from 'effect/Effect';
import * as Schema from 'effect/Schema';
import type { HookContext } from '../Context.js';
import type { HookDefinition } from '../Runner.js';
export declare const Source: Schema.Literals<readonly ["startup", "resume", "clear", "compact"]>;
declare const Input_base: Schema.Class<Input, Schema.Struct<{
    readonly hook_event_name: Schema.Literal<"SessionStart">;
    readonly source: Schema.Literals<readonly ["startup", "resume", "clear", "compact"]>;
    readonly model: Schema.optional<Schema.String>;
    readonly agent_type: Schema.optionalKey<Schema.String>;
    readonly session_title: Schema.optional<Schema.String>;
    readonly session_id: Schema.String;
    readonly transcript_path: Schema.String;
    readonly cwd: Schema.String;
    readonly permission_mode: Schema.optionalKey<Schema.String>;
    readonly effort: Schema.optionalKey<typeof import("../Envelope.js").HookEffort>;
    readonly agent_id: Schema.optionalKey<Schema.String>;
}>, {}>;
export declare class Input extends Input_base {
}
declare const HookSpecificOutput_base: Schema.Class<HookSpecificOutput, Schema.Struct<{
    readonly hookEventName: Schema.Literal<"SessionStart">;
    readonly additionalContext: Schema.optional<Schema.String>;
    readonly initialUserMessage: Schema.optional<Schema.String>;
    readonly sessionTitle: Schema.optional<Schema.String>;
    readonly watchPaths: Schema.optional<Schema.$Array<Schema.String>>;
    readonly reloadSkills: Schema.optional<Schema.Boolean>;
}>, {}>;
export declare class HookSpecificOutput extends HookSpecificOutput_base {
}
declare const Output_base: Schema.Class<Output, Schema.Struct<{
    readonly continue: Schema.optional<Schema.Boolean>;
    readonly stopReason: Schema.optional<Schema.String>;
    readonly suppressOutput: Schema.optional<Schema.Boolean>;
    readonly systemMessage: Schema.optional<Schema.String>;
    readonly terminalSequence: Schema.optional<Schema.String>;
    readonly hookSpecificOutput: Schema.optional<typeof HookSpecificOutput>;
}>, {}>;
export declare class Output extends Output_base {
}
export declare const passthrough: () => Output;
/**
 * Inject additional context at the start of the session. Claude will
 * see this as a system message. The canonical use-case for SessionStart.
 *
 * @category Decisions
 * @since 0.1.0
 */
export declare const addContext: (additionalContext: string) => Output;
export declare const startWithMessage: (initialUserMessage: string) => Output;
export declare const renameSession: (sessionTitle: string) => Output;
export declare const watchPaths: (paths: ReadonlyArray<string>, options?: {
    readonly reloadSkills?: boolean;
}) => Output;
export declare const reloadSkills: () => Output;
export declare const define: (config: {
    readonly handler: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
}) => HookDefinition<Input, Output>;
/**
 * Build a SessionStart hook that only handles matching `source` values.
 *
 * @category Constructors
 * @since 0.1.0
 */
export declare const onMatcher: (config: {
    readonly matcher: string | RegExp;
    readonly handler: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
    readonly onMismatch?: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
}) => HookDefinition<Input, Output>;
export {};
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