@phren/cli/dist/bridge/schedule-watch.js

Knowledge layer for AI agents - CLI, MCP server, and data layer

import { open, stat } from "node:fs/promises";
import { findPane, paneIdentity, snapshot } from "./herdr.js";
import { readPaneText } from "./pane-text.js";
import { object, objects } from "./protocol.js";
import { transcriptPath } from "./transcripts.js";
import { stripTerminal } from "../terminal-text.js";
/** Watching a scheduled run in its Herdr pane: how it ended, whether the final
 * reply asks the owner something, and a startup screen that blocked it. */
export const STARTUP_BLOCK_WINDOW_MS = 90_000;
export const STARTUP_BLOCK_WINDOW_OPEN_MS = 5_000;
const STARTUP_LATE_TRANSCRIPT_MS = 30_000;
const STARTUP_PANE_READ_LIMIT = 3;
const STARTUP_PROMPT_TAIL_LINES = 12;
const STARTUP_BLOCK_STATUSES = ["blocked", "waiting"];
const STARTUP_PROMPT_MARKER = /[?❯]|\(y\/?n\)|^\s*\d+[.)]\s/m;
export function classifyStartupBlock(input) {
    if (input.elapsedMs < STARTUP_BLOCK_WINDOW_MS || input.elapsedMs > STARTUP_BLOCK_WINDOW_MS + STARTUP_BLOCK_WINDOW_OPEN_MS)
        return undefined;
    if (input.transcriptActive)
        return undefined;
    if (!STARTUP_BLOCK_STATUSES.includes(String(input.status)))
        return undefined;
    const lines = input.lines.map(line => stripTerminal(line).trim()).filter(Boolean);
    const text = lines.slice(-STARTUP_PROMPT_TAIL_LINES).join("\n");
    if (!text || !STARTUP_PROMPT_MARKER.test(text))
        return undefined;
    return text.slice(0, 4000);
}
async function paneRecentLines(server, paneId) {
    const text = await readPaneText(server, paneId, { scope: "pane", source: "recent", lines: 40, what: "Scheduled run pane read" });
    return text ? text.split(/\r?\n/) : [];
}
/** The watch loop's own words for a failure, instead of assuming Herdr went away. */
export function watchFailureReason(error) {
    const first = (error instanceof Error ? error.message : String(error)).split("\n")[0].replace(/[\x00-\x1f\x7f]/g, " ").trim().slice(0, 200);
    return `Watching the scheduled prompt failed: ${first || "unknown error"}`;
}
/** The public text of one assistant row, without reasoning or tool output. */
export function publicAssistant(raw, source) {
    if (source === "codex") {
        const payload = object(raw.payload);
        if (raw.type !== "response_item" || payload.type !== "message" || payload.role !== "assistant" || payload.channel === "analysis")
            return;
        const text = typeof payload.content === "string" ? payload.content : objects(payload.content)
            .filter(block => ["text", "output_text"].includes(String(block.type))).map(block => String(block.text ?? "")).join("\n");
        return text.trim() || undefined;
    }
    if (source === "claude") {
        const message = object(raw.message);
        if (raw.type !== "assistant" || message.role !== "assistant")
            return;
        const text = typeof message.content === "string" ? message.content : objects(message.content)
            .filter(block => block.type === "text").map(block => String(block.text ?? "")).join("\n");
        return text.trim() || undefined;
    }
    if (source === "opencode") {
        const data = object(raw.data), message = object(data.message);
        if (raw.type !== "assistant/message" || message.role !== "assistant")
            return;
        const text = typeof message.content === "string" ? message.content : objects(message.content)
            .filter(block => block.type === "text").map(block => String(block.text ?? "")).join("\n");
        return text.trim() || undefined;
    }
    if (source === "copilot") {
        // A sub-agent's messages carry its agentId; only the session's own reply counts.
        const data = object(raw.data);
        if (raw.type !== "assistant.message" || raw.agentId || typeof data.content !== "string")
            return;
        return data.content.trim() || undefined;
    }
    return;
}
const FINAL_TURN_TAIL_BYTES = 512 * 1024;
/** A turn's end as the harness writes it: Claude's end_turn reply or its
 * turn_duration record, Codex's task_complete, opencode's end_turn step.
 * Copilot writes a turn_start/turn_end pair per model call, so its turn ends
 * at the turn_end after the reply marked `final_answer` (`copilotFinal`). */
function turnEnded(raw, source, copilotFinal = false) {
    const payload = object(raw.payload), message = object(raw.message), data = object(raw.data);
    if (source === "claude")
        return (raw.type === "assistant" && message.stop_reason === "end_turn")
            || (raw.type === "system" && raw.subtype === "turn_duration");
    if (source === "codex")
        return raw.type === "event_msg" && ["task_complete", "task_completed"].includes(String(payload.type));
    if (source === "copilot")
        return raw.type === "session.error" || (raw.type === "assistant.turn_end" && !raw.agentId && copilotFinal);
    return data.stop_reason === "end_turn";
}
/** The error a turn ended on, when the harness records one: Codex's
 * task_complete carries `error.message` (a usage limit, a failed compaction),
 * Copilot's session.error its `message`. */
function turnError(raw, source) {
    if (source === "copilot") {
        const data = object(raw.data), message = raw.type === "session.error" && typeof data.message === "string" ? data.message.replace(/\s+/g, " ").trim() : "";
        return message ? message.slice(0, 500) : raw.type === "session.error" ? "Copilot stopped on an error." : undefined;
    }
    if (source !== "codex")
        return;
    const error = object(object(raw.payload).error), message = typeof error.message === "string" ? error.message.replace(/\s+/g, " ").trim() : "";
    return message ? message.slice(0, 500) : undefined;
}
/** The owner stopping a turn: Claude's interruption marker, Codex's aborted turn, Copilot's abort. */
function turnInterrupted(raw, source) {
    if (source === "codex")
        return raw.type === "event_msg" && object(raw.payload).type === "turn_aborted";
    if (source === "copilot")
        return raw.type === "abort";
    if (source !== "claude" || raw.type !== "user")
        return false;
    const content = object(raw.message).content;
    const text = typeof content === "string" ? content : objects(content).filter(block => block.type === "text").map(block => String(block.text ?? "")).join("");
    return text.startsWith("[Request interrupted by user");
}
/** Claude Code background work a transcript line starts or ends, by task id:
 * a backgrounded Bash call, an async subagent or a Monitor start one; a
 * task-notification with a final status, or a TaskStop, ends it. A
 * persistent monitor runs for the whole session and is never waited on.
 * `finished` keeps when each task's first final notification was written.
 * A notification reaching an idle session is written as a queue-operation
 * row, and may stay there with no new turn to deliver it. */
/** A backgrounded command that runs until killed rather than finishing:
 * following a log, watching files, serving a dev build. Nobody waits on it. */
export const ENDLESS_COMMAND = /\btail\s+(?:-[a-zA-Z]*[fF][a-zA-Z]*\b|--follow\b)|\bjournalctl\b[^|;&]*\s(?:-[a-zA-Z]*f[a-zA-Z]*\b|--follow\b)|\blog\s+stream\b|\blogcat\b|(?:^|[;&|(]|\b(?:sudo|nohup|exec)\s)\s*watch\s|--watch\b|\binotifywait\b[^|;&]*\s-m\b|\bfswatch\b|\b(?:npm|pnpm|yarn|bun)\s+(?:run\s+)?(?:dev|serve|preview)\b|\bhttp\.server\b|\bsleep\s+infinity\b/;
function backgroundTasks(raw, running, finished, tail) {
    const result = object(raw.toolUseResult), blocks = objects(object(raw.message).content);
    if (raw.type === "assistant") {
        for (const block of blocks) {
            const input = object(block.input);
            // A command can reach the background by outrunning its timeout too.
            if (block.type === "tool_use" && typeof block.id === "string" && typeof input.command === "string")
                tail.commands.set(block.id, input.command.slice(0, 2_000));
            // Reading a task's output, or naming it, is still waiting on it
            // (ios-fast-voice2, 2026-10-01: the dispatcher's prompt came mid-run).
            if (block.type === "tool_use" && tail.earlier.size) {
                const named = JSON.stringify(block.input ?? {});
                for (const id of tail.earlier)
                    if (named.includes(id)) {
                        tail.earlier.delete(id);
                        tail.awaited.add(id);
                    }
            }
        }
    }
    const shell = typeof result.backgroundTaskId === "string" ? result.backgroundTaskId : undefined;
    const monitor = typeof result.taskId === "string" && result.persistent !== true && typeof result.timeoutMs === "number" ? result.taskId : undefined;
    const started = shell ?? (result.isAsync === true && typeof result.agentId === "string" ? result.agentId : monitor);
    if (started)
        running.add(started);
    if (shell) {
        const call = blocks.find(block => block.type === "tool_result")?.tool_use_id;
        const command = typeof call === "string" ? tail.commands.get(call) : undefined;
        if (command && ENDLESS_COMMAND.test(command))
            tail.endless.add(shell);
        else
            tail.awaited.add(shell);
    }
    else if (monitor)
        tail.awaited.add(monitor);
    const ended = (id) => { running.delete(id); tail.awaited.delete(id); tail.earlier.delete(id); tail.endless.delete(id); };
    if (typeof result.task_id === "string" && typeof result.message === "string" && /\bstopped\b/i.test(result.message))
        ended(result.task_id);
    const content = object(raw.message).content, attachment = object(raw.attachment);
    const notices = [typeof content === "string" ? content : "", typeof attachment.prompt === "string" ? attachment.prompt : "",
        raw.type === "queue-operation" && typeof raw.content === "string" ? raw.content : ""];
    // A monitor's events arrive as notifications too, without a final status.
    for (const block of notices.flatMap(notice => notice.split("<task-notification>").slice(1))) {
        const id = /<task-id>([^<\s]{1,100})<\/task-id>/.exec(block)?.[1];
        if (!id || !/<status>(?:completed|failed|killed|stopped)<\/status>/.test(block))
            continue;
        ended(id);
        if (!finished.has(id) && typeof raw.timestamp === "string" && !Number.isNaN(Date.parse(raw.timestamp)))
            finished.set(id, raw.timestamp);
    }
}
/** The last assistant reply in a transcript and whether its turn finished.
 * A person's message after the reply opens a new turn, so it clears both. */
export function finalTurnFromLines(lines, source) {
    let completed = false, lastAssistant, error, interrupted = false, copilotFinal = false;
    const running = new Set(), finished = new Map(), tail = { commands: new Map(), awaited: new Set(), earlier: new Set(), endless: new Set() };
    for (const line of lines) {
        if (!line.trim())
            continue;
        let raw;
        try {
            raw = object(JSON.parse(line));
        }
        catch {
            continue;
        }
        const payload = object(raw.payload);
        if (source === "claude") {
            backgroundTasks(raw, running, finished, tail);
            // The owner moving on leaves what earlier turns started behind: a
            // shell still running from then is a leftover, not work in flight,
            // unless the agent looks at it again.
            if (ownerPrompt(raw)) {
                for (const id of tail.awaited)
                    tail.earlier.add(id);
                tail.awaited.clear();
            }
        }
        if (turnInterrupted(raw, source)) {
            interrupted = true;
            completed = false;
            continue;
        }
        const userTurn = source === "claude" ? raw.type === "user" && !raw.isMeta && typeof object(raw.message).content === "string"
            : source === "codex" ? raw.type === "response_item" && payload.type === "message" && payload.role === "user"
                : source === "copilot" ? raw.type === "user.message"
                    : raw.type === "user/message";
        if (userTurn) {
            completed = false;
            lastAssistant = undefined;
            error = undefined;
            interrupted = false;
            copilotFinal = false;
            continue;
        }
        const text = publicAssistant(raw, source);
        if (text) {
            lastAssistant = text;
            completed = false;
            interrupted = false;
        }
        if (source === "copilot" && raw.type === "assistant.message" && !raw.agentId)
            copilotFinal = object(raw.data).phase === "final_answer";
        if (turnEnded(raw, source, copilotFinal)) {
            completed = true;
            interrupted = false;
            error = turnError(raw, source);
            copilotFinal = false;
        }
    }
    return { completed, ...(lastAssistant ? { lastAssistant } : {}), ...(completed && error ? { error } : {}),
        ...(interrupted ? { interrupted: true } : {}), ...(completed && running.size ? { background: running.size } : {}),
        ...(finished.size ? { finishedTasks: [...finished.values()] } : {}), ...(tail.awaited.size ? { awaited: tail.awaited.size } : {}),
        ...(completed && tail.endless.size ? { endless: tail.endless.size } : {}) };
}
/** A prompt the owner (or a dispatcher) typed, not a task's notification or
 * a teammate's message waking the session. */
function ownerPrompt(raw) {
    const content = object(raw.message).content;
    if (raw.type !== "user" || raw.isMeta || typeof content !== "string")
        return false;
    const text = content.trimStart();
    return !text.startsWith("<task-notification>") && !text.startsWith("<teammate-message");
}
/** The final turn of a conversation, read from the tail of its transcript. */
export async function readFinalTurn(source, sessionId) {
    if (!sessionId)
        return undefined;
    const file = await transcriptPath(source, sessionId).catch(() => undefined);
    if (!file)
        return undefined;
    const handle = await open(file, "r").catch(() => undefined);
    if (!handle)
        return undefined;
    try {
        const { size } = await handle.stat();
        const start = Math.max(0, size - FINAL_TURN_TAIL_BYTES), buffer = Buffer.alloc(size - start);
        await handle.read(buffer, 0, buffer.length, start);
        const lines = buffer.toString("utf8").split("\n");
        return finalTurnFromLines(start > 0 ? lines.slice(1) : lines, source);
    }
    catch {
        return undefined;
    }
    finally {
        await handle.close().catch(() => undefined);
    }
}
const OPTION_LINE = /^\s*(?:[-*]\s+)?\(?\d{1,2}[.)]\s+\S/;
const CHOICE_WORDS = /\b(?:choose|pick|which|options?|prefer|want|should I|shall I|let me know|decide|approve|confirm|go ahead)\b/i;
function plainLine(line) {
    return line.replace(/[*_`#>]+/g, "").replace(/\s+/g, " ").trim().slice(0, 200);
}
/** When a finished reply ends by asking the owner something (a question, or
 * numbered options introduced as a choice), the question's first line. */
export function ownerQuestion(text) {
    const lines = text.replace(/\r/g, "").split("\n").map(line => line.trimEnd());
    while (lines.length && !lines.at(-1).trim())
        lines.pop();
    if (!lines.length)
        return undefined;
    let end = lines.length;
    while (end > 0 && OPTION_LINE.test(lines[end - 1]))
        end--;
    if (lines.length - end >= 2) {
        let intro = end - 1;
        while (intro >= 0 && !lines[intro].trim())
            intro--;
        const line = intro >= 0 ? plainLine(lines[intro]) : "";
        return line && (line.endsWith("?") || (line.endsWith(":") && CHOICE_WORDS.test(line))) ? line : undefined;
    }
    const last = plainLine(lines.at(-1));
    if (!/\?\)?$/.test(last))
        return undefined;
    let first = lines.length - 1;
    while (first > 0 && lines[first - 1].trim() && !OPTION_LINE.test(lines[first - 1]))
        first--;
    return plainLine(lines[first]) || last;
}
async function realTranscriptStamp(source, sessionId) {
    if (!sessionId)
        return undefined;
    const file = await transcriptPath(source, sessionId).catch(() => undefined);
    const metadata = file ? await stat(file).catch(() => undefined) : undefined;
    return metadata ? { size: metadata.size, mtimeMs: metadata.mtimeMs } : undefined;
}
export async function watchHerdrRun(server, target, signal, startup, env = {}) {
    const now = env.now ?? Date.now;
    const pause = env.pause ?? ((ms) => new Promise(resolve => { const timer = setTimeout(resolve, ms); timer.unref(); }));
    const readPane = env.readPane ?? paneRecentLines;
    const resolveSession = env.resolveSession ?? ((name, pane) => paneIdentity(name, pane).catch(() => undefined));
    const transcriptStamp = env.transcriptStamp ?? realTranscriptStamp;
    const listPanes = env.panes ?? (async (name) => objects((await snapshot(name)).panes));
    const finalTurn = env.finalTurn ?? readFinalTurn;
    let sessionId = startup.sessionId;
    let transcriptActive = false;
    let stamp;
    let recordedBlock = false;
    let paneReads = 0;
    while (!signal.aborted) {
        await pause(1000);
        if (signal.aborted)
            break;
        try {
            const pane = findPane({ panes: await listPanes(server) }, { workspace: target.workspaceId, tab: target.tabId, pane: target.paneId });
            if (!pane)
                return { status: "failed", reason: "The Herdr pane closed before the scheduled prompt finished." };
            const status = String(pane.agent_status);
            // Herdr reports a finished turn as idle, or as done until someone looks
            // at the pane. Either one is the agent stopping on its own.
            if (status === "idle" || status === "done") {
                if (!sessionId)
                    sessionId = await resolveSession(server, pane);
                const turn = await finalTurn(startup.source, sessionId).catch(() => undefined);
                if (turn?.completed && turn.error)
                    return { status: "failed", reason: turn.error };
                const question = turn?.completed && turn.lastAssistant ? ownerQuestion(turn.lastAssistant) : undefined;
                return question ? { status: "needs-you", reason: question } : { status: "finished" };
            }
            if (!["working", "starting", "blocked", "waiting", "unknown"].includes(status)) {
                return { status: "failed", reason: "The scheduled agent stopped before the prompt finished." };
            }
            const elapsedMs = now() - startup.startedAt;
            const withinWindow = elapsedMs <= STARTUP_BLOCK_WINDOW_MS + STARTUP_BLOCK_WINDOW_OPEN_MS;
            if (!transcriptActive && startup.onBlocked && !recordedBlock && withinWindow) {
                if (!sessionId)
                    sessionId = await resolveSession(server, pane);
                const next = await transcriptStamp(startup.source, sessionId);
                if (next) {
                    if (!stamp) {
                        stamp = next;
                        if (elapsedMs > STARTUP_LATE_TRANSCRIPT_MS)
                            transcriptActive = true;
                    }
                    else if (next.size !== stamp.size || next.mtimeMs !== stamp.mtimeMs) {
                        stamp = next;
                        transcriptActive = true;
                    }
                }
            }
            if (!recordedBlock && startup.onBlocked && withinWindow && !transcriptActive
                && elapsedMs >= STARTUP_BLOCK_WINDOW_MS && STARTUP_BLOCK_STATUSES.includes(status)
                && paneReads < STARTUP_PANE_READ_LIMIT) {
                paneReads++;
                const lines = await readPane(server, target.paneId);
                const prompt = classifyStartupBlock({ elapsedMs, transcriptActive, status, lines });
                if (prompt) {
                    recordedBlock = true;
                    await Promise.resolve(startup.onBlocked(prompt)).catch(() => undefined);
                }
            }
        }
        catch (error) {
            return { status: "failed", reason: watchFailureReason(error) };
        }
    }
    return { status: "failed", reason: "Phren Hook stopped while the scheduled prompt was running." };
}