/**
 * Transcript reader.
 *
 * Claude Code stores the conversation transcript as a JSON-lines file
 * at the `transcript_path` field of every hook envelope. `readTranscript`
 * reads that file via the Effect `FileSystem` service and parses each
 * line as an unknown JSON value, returning a read-only array.
 *
 * This module requires a platform `FileSystem` layer to be provided by
 * the caller (e.g. `NodeFileSystem.layer` from
 * `@effect/platform-node-shared/NodeFileSystem`).
 *
 * @since 0.1.0
 */
import * as Effect from 'effect/Effect';
import * as FileSystem from 'effect/FileSystem';
import { TranscriptReadError } from '../Errors.js';
/**
 * Read a Claude Code transcript file and return each JSONL line as a
 * parsed unknown value.
 *
 * Requires `FileSystem.FileSystem` in the environment.
 *
 * @category Reader
 * @since 0.1.0
 * @example
 * ```ts
 * import * as Effect from 'effect/Effect'
 * import * as NodeFileSystem from '@effect/platform-node-shared/NodeFileSystem'
 * import { Hook } from 'effect-claudecode'
 *
 * const program = Effect.gen(function* () {
 *   const transcriptPath = yield* Hook.transcriptPath
 *   const events = yield* Hook.readTranscript(transcriptPath)
 *   return events.length
 * })
 *
 * program.pipe(Effect.provide(NodeFileSystem.layer))
 * ```
 */
export declare const readTranscript: (path: string) => Effect.Effect<ReadonlyArray<unknown>, TranscriptReadError, FileSystem.FileSystem>;
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