@molecule/api-agent-transcript-codex

Codex CLI transcript reader for @molecule/api-agent-transcript.

Reads both forms of a Codex CLI session into a normalized AgentSession: the rollout log Codex keeps at ~/.codex/sessions/YYYY/MM/DD/rollout-*.jsonl (per-turn model, timestamps, and every file its apply_patch wrote), and the Markdown file its /export → "Save to file" writes (# Codex conversation, then ## User / ## Assistant / ## Activity sections).

Quick Start

import { readFileSync } from 'node:fs'
import { readTranscript, setProvider } from '@molecule/api-agent-transcript'
import { provider } from '@molecule/api-agent-transcript-codex'

setProvider(provider)
const session = readTranscript({
  text: readFileSync('codex-session.md', 'utf8'),
  fileName: 'codex-session.md',
})

Type

provider

Installation

npm install @molecule/api-agent-transcript-codex @molecule/api-agent-transcript

API

Functions

`findPatches(input)`

Every patch in a tool call's input, whether the input is the raw patch, a JSON arguments object, or source code that passes the patch as a string.

function findPatches(input: string): string[]

input — The tool call's input or arguments string.

Returns: The patch texts, in order.

`looksLikeMarkdownExport(text)`

Whether a text is a Codex Markdown export.

function looksLikeMarkdownExport(text: string): boolean

text — The file's text.

Returns: True when it opens with the export's title and has a role section.

`looksLikeRollout(text)`

Whether a text is a Codex rollout.

function looksLikeRollout(text: string): boolean

text — The file's text.

Returns: True when its first JSON line is a session_meta record.

`readMarkdownExport(text)`

Read a Codex Markdown export.

function readMarkdownExport(text: string): AgentSession

text — The export's text.

Returns: The normalized session.

`readRollout(text)`

Read a Codex rollout.

function readRollout(text: string): AgentSession

text — The .jsonl text.

Returns: The normalized session.

`writesOfPatch(patch)`

The files a patch writes: an added file's whole text, an updated file's added lines.

function writesOfPatch(patch: string): AgentFileWrite[]

patch — One *** Begin Patch … *** End Patch block.

Returns: The writes.

Constants

`provider`

Reads Codex CLI sessions: the rollout log (.jsonl) and the Markdown export.

const provider: AgentTranscriptReader

Core Interface

Implements @molecule/api-agent-transcript interface.

Bond Wiring

Setup function to register this provider with the core interface:

import { setProvider } from '@molecule/api-agent-transcript'
import { provider } from '@molecule/api-agent-transcript-codex'

export function setupAgentTranscriptCodex(): void {
  setProvider(provider)
}

Injection Notes

Requirements

Peer dependencies:

@molecule/api-agent-transcript ^1.0.0

Runtime Dependencies

@molecule/api-agent-transcript
The Markdown export names no model and no times; the rollout does (turn_context.model, per-line timestamps). Use the rollout when a per-paragraph model matters.
Only the section headers ## User, ## Assistant and ## Activity split the export; the assistant's own ## headings stay part of its reply.
Dropped from user turns: the context Codex injects as whole-tag blocks (<environment_context>, <user_instructions> …) and developer messages.
Files: an Add (export) / *** Add File (patch) is the whole file; an Update contributes the lines it added. Patches are found wherever the call carries them — a raw apply_patch input, JSON arguments, or the string passed to tools.apply_patch(...) in code mode.
Verified against Codex CLI 0.156.1's own files.

`@molecule/api-agent-transcript-codex`

How it works

Reference