668 lines
23 KiB
TypeScript
668 lines
23 KiB
TypeScript
import {
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DEFAULT_READY_THRESHOLD_MS,
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DEFAULT_ACTIVE_WINDOW_MS,
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shellEscape,
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readLastJsonlEntry,
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normalizeAgentPermissionMode,
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buildAgentPath,
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setupPathWrapperWorkspace,
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readLastActivityEntry,
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checkActivityLogState,
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getActivityFallbackState,
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recordTerminalActivity,
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PREFERRED_GH_PATH,
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type Agent,
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type AgentSessionInfo,
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type AgentLaunchConfig,
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type ActivityState,
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type ActivityDetection,
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type CostEstimate,
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type PluginModule,
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type ProjectConfig,
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type RuntimeHandle,
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type Session,
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type WorkspaceHooksConfig,
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} from "@composio/ao-core";
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import { execFile, execFileSync } from "node:child_process";
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import { createReadStream } from "node:fs";
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import { readdir, stat, lstat, open } from "node:fs/promises";
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import { homedir } from "node:os";
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import { basename, join } from "node:path";
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import { createInterface } from "node:readline";
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import { promisify } from "node:util";
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const execFileAsync = promisify(execFile);
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// =============================================================================
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// Plugin Manifest
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// =============================================================================
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export const manifest = {
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name: "codex",
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slot: "agent" as const,
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description: "Agent plugin: OpenAI Codex CLI",
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version: "0.1.1",
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displayName: "OpenAI Codex",
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};
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// =============================================================================
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// Workspace Setup (delegates to shared PATH-wrapper hooks from @composio/ao-core)
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// =============================================================================
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// =============================================================================
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// Codex Session JSONL Parsing (for getSessionInfo)
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// =============================================================================
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/** Codex session directory: ~/.codex/sessions/ */
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const CODEX_SESSIONS_DIR = join(homedir(), ".codex", "sessions");
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/** Typed representation of a line in a Codex JSONL session file */
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interface CodexJsonlLine {
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type?: string;
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cwd?: string;
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model?: string;
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// Thread ID from thread_started notifications
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threadId?: string;
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// User message content (from user input events)
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content?: string;
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role?: string;
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// event_msg with token_count subtype
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msg?: {
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type?: string;
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input_tokens?: number;
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output_tokens?: number;
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cached_tokens?: number;
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reasoning_tokens?: number;
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};
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}
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/**
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* Collect all JSONL files under a directory, recursively.
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* Codex stores sessions in date-sharded directories:
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* ~/.codex/sessions/YYYY/MM/DD/rollout-*.jsonl
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*
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* Uses lstat (not stat) so symlinks to directories are never followed,
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* preventing infinite loops from symlink cycles. Max depth is capped at 4
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* (YYYY/MM/DD + 1 buffer) as an additional safety guard.
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*/
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const MAX_SESSION_SCAN_DEPTH = 4;
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async function collectJsonlFiles(dir: string, depth = 0): Promise<string[]> {
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if (depth > MAX_SESSION_SCAN_DEPTH) return [];
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let entries: string[];
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try {
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entries = await readdir(dir);
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} catch {
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return [];
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}
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const results: string[] = [];
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for (const entry of entries) {
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const fullPath = join(dir, entry);
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if (entry.endsWith(".jsonl")) {
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results.push(fullPath);
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} else {
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// Recurse into subdirectories (YYYY/MM/DD structure).
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// Use lstat to avoid following symlinks that could create cycles.
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try {
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const s = await lstat(fullPath);
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if (s.isDirectory()) {
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const nested = await collectJsonlFiles(fullPath, depth + 1);
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results.push(...nested);
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}
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} catch {
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// Skip inaccessible entries
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}
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}
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}
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return results;
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}
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/**
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* Check if the first few lines of a JSONL file contain a session_meta
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* entry matching the given workspace path. Reads only the first 4 KB
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* to avoid loading large rollout files into memory.
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*/
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async function sessionFileMatchesCwd(
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filePath: string,
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workspacePath: string,
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): Promise<boolean> {
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try {
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// Read only the first 4 KB — session_meta is always in the first few lines.
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// Avoids loading large rollout files (100 MB+) into memory.
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const handle = await open(filePath, "r");
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let content: string;
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try {
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const buffer = Buffer.allocUnsafe(4096);
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const { bytesRead } = await handle.read(buffer, 0, 4096, 0);
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content = buffer.subarray(0, bytesRead).toString("utf-8");
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} finally {
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await handle.close();
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}
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const lines = content.split("\n").slice(0, 10);
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for (const line of lines) {
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const trimmed = line.trim();
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if (!trimmed) continue;
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try {
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const parsed: unknown = JSON.parse(trimmed);
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if (
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typeof parsed === "object" &&
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parsed !== null &&
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!Array.isArray(parsed) &&
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(parsed as CodexJsonlLine).type === "session_meta" &&
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(parsed as CodexJsonlLine).cwd === workspacePath
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) {
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return true;
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}
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} catch {
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// Skip malformed lines
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}
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}
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} catch {
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// Unreadable file
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}
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return false;
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}
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/**
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* Find Codex session files whose `session_meta` cwd matches the given workspace path.
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* Recursively scans ~/.codex/sessions/ (date-sharded: YYYY/MM/DD/rollout-*.jsonl).
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* Returns the path to the most recently modified matching file, or null.
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*/
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async function findCodexSessionFile(workspacePath: string): Promise<string | null> {
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const jsonlFiles = await collectJsonlFiles(CODEX_SESSIONS_DIR);
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if (jsonlFiles.length === 0) return null;
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let bestMatch: { path: string; mtime: number } | null = null;
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for (const filePath of jsonlFiles) {
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const matches = await sessionFileMatchesCwd(filePath, workspacePath);
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if (matches) {
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try {
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const s = await stat(filePath);
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if (!bestMatch || s.mtimeMs > bestMatch.mtime) {
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bestMatch = { path: filePath, mtime: s.mtimeMs };
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}
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} catch {
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// Skip if stat fails
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}
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}
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}
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return bestMatch?.path ?? null;
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}
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/** Aggregated data extracted from a Codex session file via streaming */
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interface CodexSessionData {
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model: string | null;
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threadId: string | null;
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inputTokens: number;
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outputTokens: number;
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}
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/**
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* Stream a Codex JSONL session file line-by-line and aggregate the data
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* we need (model, threadId, token counts) without loading the entire file
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* into memory. This is critical because Codex rollout files can be 100 MB+.
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*/
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async function streamCodexSessionData(filePath: string): Promise<CodexSessionData | null> {
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try {
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const data: CodexSessionData = { model: null, threadId: null, inputTokens: 0, outputTokens: 0 };
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const rl = createInterface({
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input: createReadStream(filePath, { encoding: "utf-8" }),
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crlfDelay: Infinity,
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});
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for await (const line of rl) {
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const trimmed = line.trim();
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if (!trimmed) continue;
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try {
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const parsed: unknown = JSON.parse(trimmed);
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if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) continue;
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const entry = parsed as CodexJsonlLine;
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if (entry.type === "session_meta" && typeof entry.model === "string") {
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data.model = entry.model;
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}
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if (typeof entry.threadId === "string" && entry.threadId) {
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data.threadId = entry.threadId;
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}
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if (entry.type === "event_msg" && entry.msg?.type === "token_count") {
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data.inputTokens += entry.msg.input_tokens ?? 0;
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data.outputTokens += entry.msg.output_tokens ?? 0;
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}
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} catch {
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// Skip malformed lines
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}
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}
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return data;
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} catch {
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return null;
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}
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}
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// =============================================================================
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// Binary Resolution
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// =============================================================================
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/**
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* Resolve the Codex CLI binary path.
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* Checks (in order): which, common fallback locations.
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* Returns "codex" as final fallback (let the shell resolve it at runtime).
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*/
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export async function resolveCodexBinary(): Promise<string> {
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// 1. Try `which codex`
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try {
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const { stdout } = await execFileAsync("which", ["codex"], { timeout: 10_000 });
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const resolved = stdout.trim();
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if (resolved) return resolved;
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} catch {
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// Not found via which
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}
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// 2. Check common locations (npm global, Homebrew, Cargo — Codex is now Rust-based)
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const home = homedir();
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const candidates = [
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"/usr/local/bin/codex",
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"/opt/homebrew/bin/codex",
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join(home, ".cargo", "bin", "codex"),
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join(home, ".npm", "bin", "codex"),
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];
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for (const candidate of candidates) {
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try {
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await stat(candidate);
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return candidate;
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} catch {
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// Not found at this location
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}
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}
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// 3. Fallback: let the shell resolve it
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return "codex";
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}
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// =============================================================================
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// Agent Implementation
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// =============================================================================
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/** Append approval-policy flags to a command parts array */
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function appendApprovalFlags(parts: string[], permissions: string | undefined): void {
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const mode = normalizeAgentPermissionMode(permissions);
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if (mode === "permissionless") {
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parts.push("--dangerously-bypass-approvals-and-sandbox");
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} else if (mode === "auto-edit") {
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parts.push("--ask-for-approval", "never");
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} else if (mode === "suggest") {
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parts.push("--ask-for-approval", "untrusted");
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}
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}
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/** Append model and reasoning flags to a command parts array */
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function appendModelFlags(parts: string[], model: string | undefined): void {
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if (!model) return;
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parts.push("--model", shellEscape(model));
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// Auto-detect o-series models and enable reasoning via config override.
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// Codex does not have a --reasoning flag; reasoning is controlled via
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// the model_reasoning_effort config key.
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if (/^o[34]/i.test(model)) {
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parts.push("-c", "model_reasoning_effort=high");
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}
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}
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/** Disable Codex startup update checks/prompts in non-interactive sessions */
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function appendNoUpdateCheckFlag(parts: string[]): void {
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parts.push("-c", "check_for_update_on_startup=false");
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}
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/** TTL for session file path cache (ms). Prevents redundant filesystem scans
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* when getActivityState and getSessionInfo are called in the same refresh cycle. */
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const SESSION_FILE_CACHE_TTL_MS = 30_000;
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/** Module-level session file cache shared across the agent instance lifetime.
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* Keyed by workspace path, stores the resolved file path and an expiry timestamp. */
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const sessionFileCache = new Map<string, { path: string | null; expiry: number }>();
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/** Find session file with caching to avoid double scans per refresh cycle */
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async function findCodexSessionFileCached(workspacePath: string): Promise<string | null> {
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const cached = sessionFileCache.get(workspacePath);
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if (cached && Date.now() < cached.expiry) {
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return cached.path;
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}
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const result = await findCodexSessionFile(workspacePath);
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sessionFileCache.set(workspacePath, { path: result, expiry: Date.now() + SESSION_FILE_CACHE_TTL_MS });
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return result;
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}
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function createCodexAgent(): Agent {
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/** Cached resolved binary path (populated by init or first getLaunchCommand) */
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let resolvedBinary: string | null = null;
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/** Guard against concurrent resolveCodexBinary() calls */
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let resolvingBinary: Promise<string> | null = null;
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return {
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name: "codex",
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processName: "codex",
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getLaunchCommand(config: AgentLaunchConfig): string {
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const binary = resolvedBinary ?? "codex";
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const parts: string[] = [shellEscape(binary)];
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appendNoUpdateCheckFlag(parts);
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appendApprovalFlags(parts, config.permissions);
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appendModelFlags(parts, config.model);
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if (config.systemPromptFile) {
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// Codex reads developer instructions from a file via config override
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parts.push("-c", `model_instructions_file=${shellEscape(config.systemPromptFile)}`);
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} else if (config.systemPrompt) {
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// Codex accepts inline developer instructions via config override
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parts.push("-c", `developer_instructions=${shellEscape(config.systemPrompt)}`);
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}
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if (config.prompt) {
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// Use `--` to end option parsing so prompts starting with `-` aren't
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// misinterpreted as flags.
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parts.push("--", shellEscape(config.prompt));
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}
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return parts.join(" ");
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},
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getEnvironment(config: AgentLaunchConfig): Record<string, string> {
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const env: Record<string, string> = {};
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env["AO_SESSION_ID"] = config.sessionId;
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// NOTE: AO_PROJECT_ID is the caller's responsibility (spawn.ts sets it)
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if (config.issueId) {
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env["AO_ISSUE_ID"] = config.issueId;
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}
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// Prepend ~/.ao/bin to PATH so our gh/git wrappers intercept commands.
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// The wrappers strip this directory from PATH before calling the real
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// binary, so there's no infinite recursion.
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env["PATH"] = buildAgentPath(process.env["PATH"]);
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env["GH_PATH"] = PREFERRED_GH_PATH;
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// Disable Codex's version check/update prompt for non-interactive AO sessions.
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env["CODEX_DISABLE_UPDATE_CHECK"] = "1";
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return env;
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},
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detectActivity(terminalOutput: string): ActivityState {
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if (!terminalOutput.trim()) return "idle";
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const lines = terminalOutput.trim().split("\n");
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const lastLine = lines[lines.length - 1]?.trim() ?? "";
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// If Codex is showing its input prompt, it's idle
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if (/^[>$#]\s*$/.test(lastLine)) return "idle";
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// Check last few lines for approval prompts
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const tail = lines.slice(-5).join("\n");
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if (/approval required/i.test(tail)) return "waiting_input";
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if (/\(y\)es.*\(n\)o/i.test(tail)) return "waiting_input";
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// Default to active — specific patterns (esc to interrupt, spinner
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// symbols) all map to "active" so no need to check them individually.
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return "active";
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},
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async getActivityState(session: Session, readyThresholdMs?: number): Promise<ActivityDetection | null> {
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const threshold = readyThresholdMs ?? DEFAULT_READY_THRESHOLD_MS;
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// Check if process is running first
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const exitedAt = new Date();
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if (!session.runtimeHandle) return { state: "exited", timestamp: exitedAt };
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const running = await this.isProcessRunning(session.runtimeHandle);
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if (!running) return { state: "exited", timestamp: exitedAt };
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if (!session.workspacePath) return null;
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// 1. Try Codex's native JSONL first — it has richer 6-state detection
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// (approval_request, error, tool_call, etc.) that terminal parsing can't match.
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const sessionFile = await findCodexSessionFileCached(session.workspacePath);
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if (sessionFile) {
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const entry = await readLastJsonlEntry(sessionFile);
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if (entry) {
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const ageMs = Date.now() - entry.modifiedAt.getTime();
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const timestamp = entry.modifiedAt;
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// Map Codex JSONL entry types to activity states.
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// Confirmed types: session_meta, event_msg. Others are best-effort.
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const activeWindowMs = Math.min(DEFAULT_ACTIVE_WINDOW_MS, threshold);
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switch (entry.lastType) {
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case "user_input":
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case "tool_call":
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case "exec_command":
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if (ageMs <= activeWindowMs) return { state: "active", timestamp };
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return { state: ageMs > threshold ? "idle" : "ready", timestamp };
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case "assistant_message":
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case "session_meta":
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case "event_msg":
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return { state: ageMs > threshold ? "idle" : "ready", timestamp };
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case "approval_request":
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return { state: "waiting_input", timestamp };
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case "error":
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return { state: "blocked", timestamp };
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default:
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if (ageMs <= activeWindowMs) return { state: "active", timestamp };
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return { state: ageMs > threshold ? "idle" : "ready", timestamp };
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}
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}
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// Session file exists but no parseable entry — fall through to AO JSONL
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// checks below instead of returning early, so waiting_input/blocked
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// from terminal parsing can still be detected.
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}
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// 2. Fallback: check AO activity JSONL (terminal-derived) for waiting_input/blocked
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// that the native JSONL may not have captured.
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const activityResult = await readLastActivityEntry(session.workspacePath);
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const activityState = checkActivityLogState(activityResult);
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if (activityState) return activityState;
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// 3. Fallback: use JSONL entry with age-based decay when native session file
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// is missing or unparseable.
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const activeWindowMs = Math.min(DEFAULT_ACTIVE_WINDOW_MS, threshold);
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const fallback = getActivityFallbackState(activityResult, activeWindowMs, threshold);
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if (fallback) return fallback;
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// 4. Last resort: native session file exists but nothing else — use its mtime
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if (sessionFile) {
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try {
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const s = await stat(sessionFile);
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const ageMs = Date.now() - s.mtimeMs;
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const activeWindowMs = Math.min(DEFAULT_ACTIVE_WINDOW_MS, threshold);
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if (ageMs <= activeWindowMs) return { state: "active", timestamp: s.mtime };
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if (ageMs <= threshold) return { state: "ready", timestamp: s.mtime };
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return { state: "idle", timestamp: s.mtime };
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} catch {
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// stat failed — no signal available
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}
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}
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return null;
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},
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async recordActivity(session: Session, terminalOutput: string): Promise<void> {
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if (!session.workspacePath) return;
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await recordTerminalActivity(session.workspacePath, terminalOutput, (output) =>
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this.detectActivity(output),
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);
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},
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async isProcessRunning(handle: RuntimeHandle): Promise<boolean> {
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try {
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if (handle.runtimeName === "tmux" && handle.id) {
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const { stdout: ttyOut } = await execFileAsync(
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"tmux",
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["list-panes", "-t", handle.id, "-F", "#{pane_tty}"],
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{ timeout: 30_000 },
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);
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const ttys = ttyOut
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|
.trim()
|
|
.split("\n")
|
|
.map((t) => t.trim())
|
|
.filter(Boolean);
|
|
if (ttys.length === 0) return false;
|
|
|
|
const { stdout: psOut } = await execFileAsync("ps", ["-eo", "pid,tty,args"], {
|
|
timeout: 30_000,
|
|
});
|
|
const ttySet = new Set(ttys.map((t) => t.replace(/^\/dev\//, "")));
|
|
const processRe = /(?:^|\/)codex(?:\s|$)/;
|
|
for (const line of psOut.split("\n")) {
|
|
const cols = line.trimStart().split(/\s+/);
|
|
if (cols.length < 3 || !ttySet.has(cols[1] ?? "")) continue;
|
|
const args = cols.slice(2).join(" ");
|
|
if (processRe.test(args)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const rawPid = handle.data["pid"];
|
|
const pid = typeof rawPid === "number" ? rawPid : Number(rawPid);
|
|
if (Number.isFinite(pid) && pid > 0) {
|
|
try {
|
|
process.kill(pid, 0);
|
|
return true;
|
|
} catch (err: unknown) {
|
|
if (err instanceof Error && "code" in err && err.code === "EPERM") {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
} catch {
|
|
return false;
|
|
}
|
|
},
|
|
|
|
async getSessionInfo(session: Session): Promise<AgentSessionInfo | null> {
|
|
if (!session.workspacePath) return null;
|
|
|
|
const sessionFile = await findCodexSessionFileCached(session.workspacePath);
|
|
if (!sessionFile) return null;
|
|
|
|
// Stream the file line-by-line to avoid loading potentially huge
|
|
// rollout files (100 MB+) entirely into memory.
|
|
const data = await streamCodexSessionData(sessionFile);
|
|
if (!data) return null;
|
|
|
|
const agentSessionId = basename(sessionFile, ".jsonl");
|
|
|
|
const cost: CostEstimate | undefined =
|
|
data.inputTokens === 0 && data.outputTokens === 0
|
|
? undefined
|
|
: {
|
|
inputTokens: data.inputTokens,
|
|
outputTokens: data.outputTokens,
|
|
estimatedCostUsd:
|
|
(data.inputTokens / 1_000_000) * 2.5 + (data.outputTokens / 1_000_000) * 10.0,
|
|
};
|
|
|
|
return {
|
|
summary: data.model ? `Codex session (${data.model})` : null,
|
|
summaryIsFallback: true,
|
|
agentSessionId,
|
|
cost,
|
|
};
|
|
},
|
|
|
|
async getRestoreCommand(session: Session, project: ProjectConfig): Promise<string | null> {
|
|
if (!session.workspacePath) return null;
|
|
|
|
// Find the Codex session file for this workspace
|
|
const sessionFile = await findCodexSessionFileCached(session.workspacePath);
|
|
if (!sessionFile) return null;
|
|
|
|
// Stream the file line-by-line to avoid loading potentially huge
|
|
// rollout files (100 MB+) entirely into memory.
|
|
const data = await streamCodexSessionData(sessionFile);
|
|
if (!data?.threadId) return null;
|
|
|
|
// Use Codex's native `resume` subcommand for proper conversation resume.
|
|
// This restores the full thread state, not just a text prompt re-injection.
|
|
// Flags are placed before the positional threadId for CLI parser compatibility.
|
|
const binary = resolvedBinary ?? "codex";
|
|
const parts: string[] = [shellEscape(binary), "resume"];
|
|
appendNoUpdateCheckFlag(parts);
|
|
|
|
appendApprovalFlags(parts, project.agentConfig?.permissions);
|
|
const effectiveModel = (project.agentConfig?.model ?? data.model) as string | undefined;
|
|
appendModelFlags(parts, effectiveModel ?? undefined);
|
|
|
|
// Positional threadId goes last, after all flags
|
|
parts.push(shellEscape(data.threadId));
|
|
|
|
return parts.join(" ");
|
|
},
|
|
|
|
async setupWorkspaceHooks(workspacePath: string, _config: WorkspaceHooksConfig): Promise<void> {
|
|
await setupPathWrapperWorkspace(workspacePath);
|
|
},
|
|
|
|
async postLaunchSetup(session: Session): Promise<void> {
|
|
// Resolve binary path on first launch (cached for subsequent calls).
|
|
// Uses a promise guard to prevent concurrent calls from racing.
|
|
if (!resolvedBinary) {
|
|
if (!resolvingBinary) {
|
|
resolvingBinary = resolveCodexBinary();
|
|
}
|
|
try {
|
|
resolvedBinary = await resolvingBinary;
|
|
} finally {
|
|
resolvingBinary = null;
|
|
}
|
|
}
|
|
if (!session.workspacePath) return;
|
|
await setupPathWrapperWorkspace(session.workspacePath);
|
|
},
|
|
};
|
|
}
|
|
|
|
// =============================================================================
|
|
// Plugin Export
|
|
// =============================================================================
|
|
|
|
export function create(): Agent {
|
|
return createCodexAgent();
|
|
}
|
|
|
|
/** @internal Clear the session file cache. Exported for testing only. */
|
|
export function _resetSessionFileCache(): void {
|
|
sessionFileCache.clear();
|
|
}
|
|
|
|
export { CodexAppServerClient } from "./app-server-client.js";
|
|
export type {
|
|
AppServerClientOptions,
|
|
ThreadStartParams,
|
|
TurnStartParams,
|
|
NotificationHandler,
|
|
ApprovalHandler,
|
|
ApprovalDecision,
|
|
} from "./app-server-client.js";
|
|
|
|
export function detect(): boolean {
|
|
try {
|
|
execFileSync("codex", ["--version"], { stdio: "ignore" });
|
|
return true;
|
|
} catch {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
export default { manifest, create, detect } satisfies PluginModule<Agent>;
|