/**
 * Wire-format translation: Anthropic `ClaudeResponse` shape -> the Codex
 * Responses shape a native Codex client expects.
 *
 * Pure wire-format only — no account selection, retry policy, or transport.
 * Mirrors `claudeFormat.ts`'s role for the opposite direction: that module
 * serializes NeuroLink's internal result into Claude SSE, this one serializes
 * an already-Claude-shaped result into Codex SSE (or one JSON envelope).
 */
import type { ClaudeContentBlock, ClaudeResponse, ClaudeUsage, CodexNativeToolKind, CodexResponseEnvelope, CodexResponseItem, CodexResponseUsage } from "../types/index.js";
/** Same idiom as `generateToolUseId` (`claudeFormat.ts`), Codex's own prefix. */
export declare function generateCodexResponseId(): string;
/** Item ids are prefixed by kind so a client can tell message/tool items apart at a glance. */
export declare function generateCodexItemId(kind: "message" | "function_call" | "custom_tool_call"): string;
/**
 * Reuse the Anthropic `tool_use.id` (`toolu_...`) verbatim as the Codex `call_id`.
 * No id-mapping table exists anywhere in this codebase's translation modules, and
 * nothing on the way in validates `call_id` format — see the design doc's §5 for
 * the full reasoning and its one unresolved edge (a real, non-fallback Codex
 * backend rejecting a non-`call_`-prefixed id on a later turn).
 */
export declare function codexCallIdFromToolUseId(toolUseId: string): string;
/**
 * Absent cache fields are omitted rather than zeroed (never conflate "not
 * observed" with "observed as zero" — the field's own doc comment on
 * `CodexResponseUsage` states this contract).
 */
export declare function synthesizeCodexUsage(usage: ClaudeUsage): CodexResponseUsage;
/**
 * Shared by the streaming serializer's non-failure item close and the
 * non-streaming path (`serializeCodexResponse`), so item shape is defined
 * once. Always produces a "completed" item — the streaming failure path
 * (an item closed "incomplete" mid-turn) builds its item directly, since it
 * must preserve the raw accumulated text/argument bytes rather than a value
 * reconstructed through this function.
 */
export declare function buildCodexResponseItem(block: ClaudeContentBlock, itemId: string, toolKindByName?: ReadonlyMap<string, CodexNativeToolKind>): CodexResponseItem | null;
/** Non-streaming path: `§7` of the design — the document root IS a `CodexResponseEnvelope`. */
export declare function serializeCodexResponse(result: ClaudeResponse, requestModel: string, toolKindByName?: ReadonlyMap<string, CodexNativeToolKind>): CodexResponseEnvelope;
/**
 * Push-based streaming serializer. A genuinely incremental tool-call-argument
 * path (`openToolCall`/`pushToolCallArgsDelta`/`closeToolCall`) forwards each
 * raw `input_json_delta` chunk as it arrives rather than buffering the whole
 * call before emitting anything — `partial_json` is not individually valid
 * JSON, so a serializer that validated per-chunk could not do this.
 */
export declare class CodexResponsesStreamSerializer {
    private readonly model;
    private readonly toolKindByName;
    private state;
    private readonly responseId;
    private outputIndex;
    private openKind;
    private openItemId;
    private textAccum;
    private argsAccum;
    private toolCallId;
    private toolName;
    private readonly closedItems;
    private terminalEnvelope;
    constructor(model: string, toolKindByName?: ReadonlyMap<string, CodexNativeToolKind>);
    start(): Generator<string>;
    pushDelta(text: string): Generator<string>;
    /** Opens the tool-call item header at content_block_start, before any argument text
     *  is known — mirrors what content_block_start already gives us (id, name). A tool
     *  the request declared `custom` opens as a `custom_tool_call` item. */
    openToolCall(toolUseId: string, name: string): Generator<string>;
    /** Forwards one raw partial_json fragment as-is — no JSON.parse here, because a lone
     *  fragment is not required to be valid JSON on its own. A custom call's fragments
     *  are the `{"input":"..."}` wrapper, not client text, so they are only buffered;
     *  `closeToolCall` emits the unwrapped input once the whole wrapper is known. */
    pushToolCallArgsDelta(rawChunk: string): Generator<string>;
    /**
     * Public close for a tool-use block at `content_block_stop`. A no-op when no
     * tool-call item is open, so a driver can call it unconditionally.
     * Validates the accumulated arguments once, here — the one place validity
     * is required. Throws on malformed JSON; the caller must catch and route to
     * `emitFailure` (never swallowed, never retried after this point).
     */
    closeToolCall(): Generator<string>;
    /**
     * Public close for a text block at `content_block_stop`, mirroring
     * `closeToolCall`'s role for the message item. A no-op when no message item
     * is open, so a driver can call it unconditionally alongside `closeToolCall`
     * without first inspecting which kind is currently open.
     */
    closeTextBlock(): Generator<string>;
    finish(stopReason: string | null, usage: ClaudeUsage): Generator<string, CodexResponseEnvelope>;
    /**
     * Post-commit terminal path. Closes any open item as "incomplete" — now
     * representable via `CodexResponseItemStatus` — then emits a single
     * `response.failed`. Idempotent: a second call after this one already ran
     * returns the same envelope without emitting further frames, so a driver
     * that reaches it defensively from more than one place never double-emits.
     */
    emitFailure(_status: number, message: string, code?: string): Generator<string, CodexResponseEnvelope>;
    private assertNotTerminal;
    /**
     * The custom-kind close: nothing was streamed live, so one input delta
     * carries the whole unwrapped input, then its done event. Lenient where the
     * function path throws: the wrapper is Claude's own output for the
     * single-field schema `mapCodexCustomToolToClaude` declared, so a parse
     * failure is an internal bug, and the raw accumulated text is emitted rather
     * than failing the turn over it.
     */
    private closeCustomToolCall;
    private openMessage;
    /** Closes whichever item is currently open, as "incomplete" when `failed`. */
    private closeOpenItem;
    /**
     * The failure-close counterpart to `closeToolCall`. Arguments are carried
     * verbatim from `argsAccum` and never re-validated — `JSON.parse` is not
     * called on the failure path, and no `function_call_arguments.done` is
     * emitted, since the arguments never reached a validated, complete state.
     */
    private closeFailedFunctionCall;
    /**
     * The failure close for a custom call. Its accumulated bytes are Anthropic's
     * JSON wrapper, not the client's grammar text, so `input` is the unwrapped
     * string when the wrapper already parses and "" otherwise — an incomplete
     * item is never executed. No input done event, as on the function path.
     */
    private closeFailedCustomToolCall;
    private closeMessageItem;
}