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Refactored into an extension
1 parent 150b057 commit 0ad83fd

3 files changed

Lines changed: 86 additions & 64 deletions

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‎cursor-cli-demo/extensions/cursor-cli.ts‎

Lines changed: 78 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,78 @@
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import type { BuildExtension } from "@trigger.dev/build";
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import type { ChildProcess } from "child_process";
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import { spawn } from "child_process";
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import { chmodSync, copyFileSync, existsSync, readdirSync } from "fs";
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import type { Readable } from "stream";
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export type CursorAgentProcess = ChildProcess & {
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stdout: Readable;
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stderr: Readable;
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};
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/** Where the build layer copies cursor-agent's resolved files */
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export const CURSOR_AGENT_DIR = "/usr/local/lib/cursor-agent";
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/** Install the Cursor CLI binary into the Trigger.dev container image */
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export function cursorCli(): BuildExtension {
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return {
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name: "cursor-cli",
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onBuildComplete(context) {
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if (context.target === "dev") return;
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context.addLayer({
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id: "cursor-cli",
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image: {
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instructions: [
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"RUN apt-get update && apt-get install -y curl ca-certificates && rm -rf /var/lib/apt/lists/*",
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'ENV PATH="/root/.local/bin:$PATH"',
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"RUN curl -fsSL https://cursor.com/install | bash",
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// Copy the resolved index.js + deps to a fixed path so we can invoke with process.execPath at runtime
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`RUN cp -r $(dirname $(readlink -f /root/.local/bin/cursor-agent)) ${CURSOR_AGENT_DIR}`,
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],
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},
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});
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},
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};
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}
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type SpawnCursorAgentOptions = {
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cwd: string;
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env?: Record<string, string | undefined>;
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};
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/**
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* Spawn cursor-agent at runtime inside the Trigger.dev container.
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*
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* Handles the /tmp copy + chmod workaround needed because the runtime
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* strips execute permissions, and cursor-agent's native .node modules
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* require its bundled node (ABI mismatch with container node).
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*/
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export function spawnCursorAgent(
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args: string[],
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options: SpawnCursorAgentOptions,
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): CursorAgentProcess {
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const entryPoint = `${CURSOR_AGENT_DIR}/index.js`;
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const bundledNode = `${CURSOR_AGENT_DIR}/node`;
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const tmpNode = "/tmp/cursor-node";
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if (!existsSync(entryPoint)) {
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const dirExists = existsSync(CURSOR_AGENT_DIR);
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throw new Error(
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`cursor-agent not found at ${entryPoint}. Dir: ${dirExists}. Contents: ${dirExists ? readdirSync(CURSOR_AGENT_DIR).join(", ") : "N/A"}`,
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);
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}
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copyFileSync(bundledNode, tmpNode);
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chmodSync(tmpNode, 0o755);
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// stdio: ["ignore", "pipe", "pipe"] guarantees stdout/stderr are non-null
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return spawn(tmpNode, [entryPoint, ...args], {
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stdio: ["ignore", "pipe", "pipe"],
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env: {
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...process.env,
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...options.env,
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CURSOR_INVOKED_AS: "cursor-agent",
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},
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cwd: options.cwd,
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}) as CursorAgentProcess;
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}

‎cursor-cli-demo/trigger.config.ts‎

Lines changed: 1 addition & 25 deletions
Original file line numberDiff line numberDiff line change
@@ -1,29 +1,5 @@
11
import { defineConfig } from "@trigger.dev/sdk";
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3-
import type { BuildExtension } from "@trigger.dev/build";
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/** Install the Cursor CLI binary into the Trigger.dev container image */
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function cursorCli(): BuildExtension {
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return {
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name: "cursor-cli",
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onBuildComplete(context) {
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if (context.target === "dev") return;
11-
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context.addLayer({
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id: "cursor-cli",
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image: {
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instructions: [
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"RUN apt-get update && apt-get install -y curl ca-certificates && rm -rf /var/lib/apt/lists/*",
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'ENV PATH="/root/.local/bin:$PATH"',
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"RUN curl -fsSL https://cursor.com/install | bash",
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// Copy the resolved index.js + deps to a fixed path so we can invoke with process.execPath at runtime
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"RUN cp -r $(dirname $(readlink -f /root/.local/bin/cursor-agent)) /usr/local/lib/cursor-agent",
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],
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},
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});
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},
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};
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}
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import { cursorCli } from "./extensions/cursor-cli";
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export default defineConfig({
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project: process.env.TRIGGER_PROJECT_REF!,

‎cursor-cli-demo/trigger/cursor-agent.ts‎

Lines changed: 7 additions & 39 deletions
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
import { logger, metadata, task } from "@trigger.dev/sdk";
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import { spawn } from "child_process";
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import { chmodSync, copyFileSync, existsSync, mkdirSync, readdirSync } from "fs";
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import { mkdirSync } from "fs";
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import type { CursorEvent } from "@/lib/cursor-events";
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import { spawnCursorAgent } from "../extensions/cursor-cli";
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export type CursorAgentPayload = {
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prompt: string;
@@ -22,44 +22,12 @@ export const cursorAgentTask = task({
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const model = payload.model ?? "sonnet-4.5";
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// The Trigger.dev runtime strips execute permissions from all binaries.
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// cursor-agent bundles native .node modules (pty, sqlite3, etc.) compiled for its own node,
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// so we must use cursor-agent's bundled node — not the container's node (ABI mismatch).
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// Workaround: copy the bundled node to /tmp and chmod +x it there.
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const cursorDir = "/usr/local/lib/cursor-agent";
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const entryPoint = `${cursorDir}/index.js`;
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const bundledNode = `${cursorDir}/node`;
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const tmpNode = "/tmp/cursor-node";
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if (!existsSync(entryPoint)) {
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const dirExists = existsSync(cursorDir);
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throw new Error(`cursor-agent not found at ${entryPoint}. Dir: ${dirExists}. Contents: ${dirExists ? readdirSync(cursorDir).join(", ") : "N/A"}`);
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}
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logger.info("Spawning cursor-agent", { workspace, model });
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// Copy bundled node to /tmp and make it executable
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copyFileSync(bundledNode, tmpNode);
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chmodSync(tmpNode, 0o755);
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logger.info("Spawning cursor-agent", { node: tmpNode, entryPoint, workspace, model });
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const child = spawn(tmpNode, [
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entryPoint,
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"-p",
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"--force",
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"--output-format",
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"stream-json",
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"--model",
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model,
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payload.prompt,
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], {
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stdio: ["ignore", "pipe", "pipe"],
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env: {
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...process.env,
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CURSOR_API_KEY: process.env.CURSOR_API_KEY,
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CURSOR_INVOKED_AS: "cursor-agent",
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},
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cwd: workspace,
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});
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const child = spawnCursorAgent(
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["-p", "--force", "--output-format", "stream-json", "--model", model, payload.prompt],
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{ cwd: workspace, env: { CURSOR_API_KEY: process.env.CURSOR_API_KEY } },
30+
);
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let spawnError: Error | null = null;
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child.on("error", (err) => {

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