Batch-dispatch tasks to Google Jules in parallel — and use it as an MCP tool inside Claude Code or OpenAI Codex CLI.
🌐 Languages: English · 简体中文
🌐 Landing page & interactive docs
https://yuuqq.github.io/jules-dispatch/ — full onboarding guide and MCP integration examples
jules-dispatch is a CLI and an MCP server for the Google Jules API that lets you:
- Dispatch any number of Jules tasks with up to 50 concurrent session creations, optionally paced
- Define tasks as simple YAML files — title, repo, branch, prompt
- Poll for completion and collect generated PR links
- Approve plans, send follow-up messages, cancel runaway sessions, tail live activity
- Plug into Claude Code or Codex as an MCP server — your AI assistant calls Jules as a tool
It turns Jules from a "one task at a time" tool into a massively parallel coding workforce, controlled by either humans on the CLI or other AIs over MCP.
flowchart LR
O["🧠 Orchestrator<br/>(Claude / Codex / you)"]
O -->|writes| T["📄 tasks/*.yaml"]
T --> D["⚡ jules-dispatch batch"]
D -->|parallel| J1["🤖 Jules #1"]
D -->|parallel| J2["🤖 Jules #2"]
D -->|parallel| J3["🤖 Jules #3"]
D -->|parallel| J4["🤖 Jules #N"]
J1 --> P1["🔀 PR #1"]
J2 --> P2["🔀 PR #2"]
J3 --> P3["🔀 PR #3"]
J4 --> P4["🔀 PR #N"]
classDef orch fill:#7c3aed,stroke:#5b21b6,color:#fff
classDef tool fill:#0891b2,stroke:#0e7490,color:#fff
classDef worker fill:#f59e0b,stroke:#b45309,color:#fff
classDef pr fill:#10b981,stroke:#047857,color:#fff
class O orch
class D tool
class J1,J2,J3,J4 worker
class P1,P2,P3,P4 pr
Entirely optional. All core commands work without any LLM key. Skip this section if you only want raw dispatch.
Stop hand-writing task YAML. Give jules-dispatch one sentence and let an LLM expand it into N parallel Jules sessions.
$ jules-dispatch auto "Migrate every Express route to Fastify and add request-validation tests"
Planning with gpt-4o-mini...
Planned 6 task(s):
1. Migrate auth routes (/api/auth/*) to Fastify
2. Migrate user routes (/api/users/*) to Fastify
3. Migrate billing routes (/api/billing/*) to Fastify
4. Replace Express middleware with Fastify hooks
5. Update server bootstrap to use Fastify instance
6. Add Vitest request-validation tests for all migrated routes
Dispatch all 6 task(s)? [y/N]Bring your own LLM — works with any OpenAI-compatible /chat/completions endpoint:
| Provider | LLM_BASE_URL |
Example LLM_MODEL |
|---|---|---|
| OpenAI (default) | (omit — defaults to https://api.openai.com/v1) |
gpt-4o-mini, gpt-4o, o3-mini |
| OpenRouter | https://openrouter.ai/api/v1 |
openrouter/auto, anthropic/claude-opus-4.7 |
| Ollama (local, free) | http://localhost:11434/v1 |
llama3.1, qwen2.5-coder:32b |
| Groq | https://api.groq.com/openai/v1 |
llama-3.3-70b-versatile |
| Together / Fireworks / DeepInfra / vLLM / LiteLLM / Azure OpenAI | (their endpoint) | (their model id) |
Configure via env vars (LLM_API_KEY, LLM_BASE_URL, LLM_MODEL) or per-invocation flags (--llm-key, --llm-base-url, --llm-model). OPENAI_API_KEY and OPENROUTER_API_KEY are also recognised as fallbacks.
| Command / Tool | What it does |
|---|---|
jules-dispatch plan-tasks "<intent>" |
Plan only — print or write tasks to a YAML file |
jules-dispatch auto "<intent>" |
Plan + dispatch in one shot (with confirmation) |
MCP jules_plan_tasks |
Same planning, exposed to Claude Code / Codex (only registered if an LLM key is configured) |
MCP jules_auto |
One-shot plan + dispatch (only registered if an LLM key is configured) |
- 🧰 MCP server (
jules-dispatch mcp) — 15 always-registered tools, plus 2 optional planning tools when an LLM key is configured - 🤖
--jsonmode — machine-readable output on every command for AI agents and shell pipelines - ✅ Plan approval workflow —
plan,approvecommands +requirePlanApproval: truetask option - 📡 Live tailing —
tail <id>streams activity events as they happen - ❌ Cancel sessions —
cancel <id>aborts runaway runs - 🔍 Direct lookup —
get <id>,status --idsno longer limited to the recent page - 🛡️ Real failure detection — uses session.state, fails fast, distinct exit codes
- ⚡ Smart retries — exponential backoff with jitter, honours
Retry-After - 📥 Stdin input —
dispatch -reads YAML/JSON from a pipe - 🔑
--api-keyflag — pass keys per-invocation, no .env required
| Feature | Details |
|---|---|
| ⚡ Bounded, paced dispatch | Continuously replenish a 1–50 worker pool and optionally space launches with --pace-ms |
| 📋 YAML task files | Multi-document YAML supported (--- separators) |
| 🔄 Status polling | Auto-detects PRs, plan approvals, failures |
| 💬 Plan & message control | Approve plans, send follow-up messages, cancel sessions |
| 🤖 MCP server | Drop into Claude Code or Codex as a tool |
| 📦 Structured output | --json mode for clean piping into agents and scripts |
| 📝 Dispatch logs | JSON audit trail of every dispatch run |
jules-dispatch works best when a change can be split into independent, PR-sized tasks. If tasks edit the same files or depend on earlier output, dispatch them in separate waves instead of running them concurrently.
Suppose the auth, billing, users, and audit modules all need tests. Put one self-contained task file per module in a dedicated directory, then dispatch the directory as a batch:
jules-dispatch batch tasks/add-tests --parallel 4Each Jules session owns one module. With AUTO_CREATE_PR enabled, the result is a set of focused PRs that can be reviewed and merged independently. A failed task can be retried without restarting the rest.
Why it helps: independent test work runs at the same time without turning into one large, hard-to-review change.
For a goal such as migrating an Express API to Fastify, use the optional LLM planner to identify independent routes, middleware, startup code, and test work:
jules-dispatch auto "Migrate the Express API to Fastify and add request-validation tests" \
--max 8 --parallel 4auto shows the proposed tasks and asks for confirmation before dispatching them. Use plan-tasks instead when you want to save and edit the generated YAML before anything is sent to Jules.
Why it helps: the planner reduces the cost of decomposing a broad goal while keeping the task boundaries visible and reviewable.
To add a shared CI check, security baseline, or contribution policy across several Jules-connected repositories, give each task its own source:
title: "Add the security baseline to the API"
prompt: "Add the agreed security checks and open a focused PR."
source: "sources/github/acme/api"
branch: "main"
---
title: "Add the security baseline to the worker"
prompt: "Add the agreed security checks and open a focused PR."
source: "sources/github/acme/worker"
branch: "main"Place the task file in a dedicated batch directory and dispatch it with controlled concurrency and launch pacing:
jules-dispatch batch tasks/security-baseline --parallel 6 --pace-ms 250Why it helps: one command coordinates the rollout while preserving a separate session and PR for each repository plus an audit log for the batch.
Authentication, authorization, and database migrations often need review before implementation begins. Require Jules to stop after planning:
title: "Refactor authorization checks"
prompt: "Centralize API authorization checks without changing the public API."
requirePlanApproval: trueInspect the plan, send corrections if needed, approve it, and then continue monitoring:
jules-dispatch plan abc123
jules-dispatch message abc123 "Do not change the public API"
jules-dispatch plan abc123 # inspect the revised plan
jules-dispatch approve abc123
jules-dispatch wait abc123Why it helps: you keep control of high-impact decisions without giving up delegated execution.
After configuring the MCP server, describe the outcome instead of operating each session yourself:
Analyze this repository, split its test gaps into independent tasks, and dispatch them to Jules. Ask me before approving plans or answering feedback requests. When every session finishes, summarize the outcome and PR URL for each task.
The coding assistant can call jules_dispatch, wait with jules_monitor, inspect action-required sessions with jules_interact, and return a final PR summary.
Why it helps: you manage the goal and the important decisions while the assistant handles dispatch, follow-up, and result collection.
The MCP server exposes Jules as a set of tools your coding AI can call directly.
sequenceDiagram
autonumber
actor U as 👤 You
participant CC as 💬 Claude Code / Codex
participant MCP as ⚡ jules-dispatch (MCP)
participant J as ☁️ Google Jules
U->>CC: "Add tests to 5 modules"
CC->>MCP: jules_dispatch(tasks)
MCP->>J: POST /sessions × 5
J-->>MCP: 5 session IDs
MCP-->>CC: {dispatched: 5}
CC->>MCP: jules_monitor(ids, wait=true)
loop until terminal or action required
MCP->>J: GET /sessions/{id}
end
MCP-->>CC: {sessions, wait: {completed, actionRequired, ...}}
opt a session requires action
CC->>MCP: jules_interact(id)
MCP-->>CC: state + plan + activities
CC->>MCP: jules_approve_plan(id) or jules_send_message(id, text)
CC->>MCP: jules_monitor(ids, wait=true)
end
CC->>MCP: jules_interact(id)
MCP-->>CC: terminal status + PR output
CC-->>U: "Done. PRs: #42, #43, #44, #45, #46"
npm install -g @yuuqq/jules-dispatchFull setup guide (including GSD integration): docs/MCP-INTEGRATION.md
Add to ~/.config/claude-code/mcp.json (or use claude mcp add):
{
"mcpServers": {
"jules-dispatch": {
"command": "jules-dispatch",
"args": ["--project", "/path/to/your/project", "mcp"],
"env": {
"JULES_API_KEY": "your-api-key-here",
"JULES_DEFAULT_SOURCE": "sources/github/owner/repo",
"JULES_DEFAULT_BRANCH": "main"
}
}
}
}Then in Claude Code: "Dispatch 5 Jules tasks to add tests to the auth, payments, users, sessions, and audit modules." Claude calls jules_dispatch, monitors them with jules_monitor, and uses jules_interact when it needs full context or PR output.
Add to ~/.codex/config.toml:
[mcp_servers.jules-dispatch]
command = "jules-dispatch"
args = ["--project", "/path/to/your/project", "mcp"]
env = { JULES_API_KEY = "your-api-key-here", JULES_DEFAULT_SOURCE = "sources/github/owner/repo" }This repository also ships a lightweight skill wrapper at skills/jules-dispatch/. The skill teaches Claude Code, Codex, or any Agent Skills-compatible host when and how to use the jules-dispatch MCP tools.
For Codex, copy or install the folder as jules-dispatch in your Codex skills directory, then restart Codex:
cp -R skills/jules-dispatch "${CODEX_HOME:-$HOME/.codex}/skills/jules-dispatch"For Agent Skills-compatible hosts that use a shared skills directory, copy the same folder into that host's skills directory. The skill is only the instruction layer; you still need the MCP server configured with jules-dispatch mcp and a valid JULES_API_KEY.
The server always registers 15 tools: 3 recommended consolidated tools, 5 utility tools, and 7 deprecated aliases. Two additional planning tools are registered when an LLM key is configured.
Accepts a single task object, an array of tasks, or a YAML/JSON string.
Parameters:
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
tasks |
object | object[] | string |
Yes | — | Task definition(s). Objects need title + prompt. Strings are parsed as YAML/JSON. |
format |
"yaml" | "json" |
No | "yaml" |
Format when tasks is a string |
parallel |
number |
No | 10 |
Max concurrent dispatches (1–50) |
paceMs |
number |
No | 0 |
Global minimum delay between session creation starts (0–60000 ms) |
{
"tasks": [
{ "title": "Fix auth bug", "prompt": "Fix the null check in login()" },
{ "title": "Add tests", "prompt": "Add unit tests for auth.ts" }
],
"parallel": 5,
"paceMs": 250
}Dispatch uses a continuously replenished worker pool rather than fixed waves: whenever one task finishes creating its session, the next queued task can start. paceMs applies globally across all workers, so consecutive creation starts are separated by at least that interval while result order still matches task order.
Parameters:
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
sessionIds |
string[] |
Yes | — | Session IDs to monitor |
wait |
boolean |
No | false |
If true, poll until all sessions are terminal, any session requires action, or the timeout expires |
intervalMs |
number |
No | 10000 |
Poll interval in ms (min 1000) |
timeoutMs |
number |
No | 600000 |
Max wait time in ms (min 1000) |
failFast |
boolean |
No | false |
Exit immediately on first failure |
{
"sessionIds": ["abc123", "def456"],
"wait": true,
"timeoutMs": 300000
}Action-required states are AWAITING_PLAN_APPROVAL, AWAITING_USER_FEEDBACK, and PAUSED. When the result includes actionRequired, inspect those sessions with jules_interact, approve the plan or send feedback as appropriate, then call jules_monitor again for the unresolved IDs.
Returns session details, derived status, the globally latest plan, activity timeline, and PR output in one call. The server scans the complete oldest-first activity feed, then returns the newest activityCount entries in chronological order plus activityTotal for the full feed.
Parameters:
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
sessionId |
string |
Yes | — | Session ID to inspect |
activityCount |
number |
No | 10 |
Number of recent activities (1–100) |
{ "sessionId": "abc123", "activityCount": 20 }| Tool | Parameters | Description |
|---|---|---|
jules_list_sources |
(none) | List all GitHub repos connected to Jules |
jules_list_sessions |
pageSize?, pageToken? |
List recent sessions with pagination |
jules_approve_plan |
sessionId |
Approve a plan-gated session |
jules_send_message |
sessionId, text |
Send a follow-up message |
jules_cancel_session |
sessionId |
Cancel a running session |
| Tool | Parameters | Description |
|---|---|---|
jules_plan_tasks |
description, maxTasks?, source?, branch?, context? |
Plan tasks from a high-level description |
jules_auto |
description, maxTasks?, source?, branch?, parallel?, paceMs? |
Plan + dispatch in one shot |
All tools return:
{ "success": true, "data": { ... } }Errors return:
{
"success": false,
"error": {
"message": "Authentication failed",
"status": 401,
"name": "Error",
"recovery_hint": "Check your API key"
}
}jules_dispatch_task, jules_dispatch_batch, jules_get_session, jules_list_activities, jules_get_plan, jules_status, and jules_wait_for_completion remain functional for compatibility. New integrations should use the consolidated tools.
- Node.js 20+
- A Google Jules account and API key
- A GitHub repository connected to Jules
npm install -g @yuuqq/jules-dispatchjules-dispatch initThe wizard prompts for your API key, default source, and branch. It writes a .env file.
For CI/scripts (non-interactive):
jules-dispatch init --api-key sk-xxx --source sources/github/owner/repojules-dispatch doctor# tasks/add-dark-mode.yaml
title: "Add Dark Mode Support"
prompt: |
Add a dark mode toggle to the React app:
1. Add a ThemeContext with light/dark state
2. Wrap App with ThemeProvider
3. Add a toggle button in the Header
4. Persist preference in localStorage
5. Open a PRjules-dispatch dispatch tasks/add-dark-mode.yaml
# ✓ Add Dark Mode Support
# Session: https://jules.google.com/session/abc123
# ID: abc123jules-dispatch batch tasks/ --parallel 10That's it — 6 steps from install to your first PR.
| Flag | Default | Description |
|---|---|---|
-p, --project <dir> |
. |
Directory containing your .env file |
--api-key <key> |
Jules API key (overrides JULES_API_KEY) |
|
--json |
off | Machine-readable output. NDJSON for streaming commands. |
| Command | What it does |
|---|---|
init |
Interactive first-run wizard (API key, source, branch) |
dispatch <taskFile> |
Dispatch a single task. Use - to read from stdin. |
batch [taskDir] |
Dispatch all .yaml/.yml/.json files in a directory |
auto <description> |
LLM-plan + dispatch in one shot (with confirmation) |
plan-tasks <description> |
Use LLM to expand an intent into N task drafts (no dispatch) |
status |
Summary of recent sessions (or specific --ids) |
get <sessionId> |
Full details of one session |
wait <ids...> |
Poll until sessions are terminal, require action, or time out |
tail <sessionId> |
Live-stream activity events for a session |
plan <sessionId> |
Show the most recent generated plan |
approve <sessionId> |
Approve a pending plan |
message <sessionId> <text> |
Send a follow-up message |
cancel <sessionId> |
Cancel a running session |
sources |
List connected GitHub repos (auto-paginates) |
doctor |
Validate environment, API key, connectivity, task files |
mcp |
Run as an MCP server over stdio |
| Code | Meaning |
|---|---|
0 |
Success |
1 |
Generic error |
2 |
Authentication error (missing or rejected API key) |
3 |
Validation or configuration error (bad task file, args, or Jules settings) |
4 |
Partial failure (some batch tasks failed) |
5 |
Timeout (wait ran out of time) |
status reports session or activity lookup failures explicitly as status: "error" and exits nonzero instead of fabricating a Jules failure or trusting a potentially stale state. Polling commands retry only network, rate-limit, and server errors; invalid requests, authentication failures, and missing sessions fail immediately with the affected session ID in the error context.
# Override repo/branch
jules-dispatch dispatch tasks/my-task.yaml \
--source sources/github/org/other-repo --branch develop
# Read from stdin
echo 'title: Quick fix\nprompt: Fix typo in README' | jules-dispatch dispatch -
# JSON output (great for piping)
jules-dispatch dispatch tasks/my-task.yaml --json | jq -r '.sessionId'jules-dispatch batch tasks/ # default tasks/ dir
jules-dispatch batch tasks/ --parallel 20 # 20 concurrent
jules-dispatch batch tasks/ --parallel 10 --pace-ms 250 # globally space starts by 250 ms
jules-dispatch batch tasks/ --no-log # don't write dispatch log
jules-dispatch batch tasks/ --json # one JSON summary at the endbatch and auto both use the same continuously replenished worker pool. --parallel caps in-flight session creation and --pace-ms sets the global minimum spacing between creation starts; it does not add a delay separately inside each worker.
# Chain dispatch → wait via JSON output:
ID=$(jules-dispatch dispatch tasks/x.yaml --json | jq -r '.sessionId')
jules-dispatch wait "$ID" --interval 10000 --timeout 1800000jules-dispatch tail abc123 # human-readable stream
jules-dispatch tail abc123 --json # NDJSON event streamjules-dispatch tracks every Jules session through its full lifecycle and surfaces each state through the CLI / MCP:
stateDiagram-v2
[*] --> QUEUED
QUEUED --> PLANNING
PLANNING --> IN_PROGRESS
PLANNING --> AWAITING_PLAN_APPROVAL: approval required
AWAITING_PLAN_APPROVAL --> IN_PROGRESS: approve plan
IN_PROGRESS --> AWAITING_USER_FEEDBACK: input required
AWAITING_USER_FEEDBACK --> IN_PROGRESS: send feedback
IN_PROGRESS --> PAUSED: execution paused
PAUSED --> IN_PROGRESS: execution resumes
IN_PROGRESS --> COMPLETED: success
IN_PROGRESS --> FAILED: error
COMPLETED --> [*]
FAILED --> [*]
| Official state | Meaning | Recommended action |
|---|---|---|
STATE_UNSPECIFIED |
No specific state was supplied | Recheck with jules_monitor or inspect with jules_interact |
QUEUED / PLANNING / IN_PROGRESS |
Jules is actively progressing | Continue monitoring; use tail for live activity |
AWAITING_PLAN_APPROVAL |
The generated plan needs approval | Review with jules_interact, then use approve / jules_approve_plan |
AWAITING_USER_FEEDBACK |
Jules needs clarification or input | Inspect context, then use message / jules_send_message |
PAUSED |
Execution is paused and needs attention | Inspect context, provide guidance if appropriate, then monitor again |
COMPLETED |
Terminal success | Inspect the session and collect PR output |
FAILED |
Terminal failure | Inspect the newest failure activity and decide whether to retry or replace the task |
For compatibility, jules-dispatch also normalizes legacy API states: PENDING, RUNNING, AWAITING_USER_INPUT, CANCELLED, and CANCELED. Cancellation is sent with the Jules DELETE /sessions/{id} operation.
| Field | Type | Required | Default | Description |
|---|---|---|---|---|
title |
string |
Yes | — | Human-readable task name shown in CLI status and session lists |
prompt |
string |
Yes | — | Detailed instructions for the Jules agent. The more specific, the better the output. |
source |
string |
No | JULES_DEFAULT_SOURCE from .env |
Jules source identifier, e.g. sources/github/owner/repo. Override per-task. |
branch |
string |
No | JULES_DEFAULT_BRANCH from .env (or main) |
Git branch for the Jules session to start from |
autoMode |
string |
No | AUTO_CREATE_PR |
Automation mode. Values: AUTO_CREATE_PR (Jules creates a PR automatically), NONE |
requirePlanApproval |
boolean |
No | false |
When true, Jules pauses after generating a plan and waits for jules-dispatch approve <id> |
title: "Add unit tests for auth module"
prompt: |
Add comprehensive unit tests for src/auth.ts:
1. Test login with valid credentials
2. Test login with invalid credentials
3. Test token refresh flow
4. Test session expiry handling
5. Open a PR with the test file
source: "sources/github/myorg/myrepo"
branch: "develop"
autoMode: "AUTO_CREATE_PR"
requirePlanApproval: falsetitle: "Fix lint errors in src/auth"
prompt: "Fix all ESLint errors in src/auth.ts"
---
title: "Fix lint errors in src/api"
prompt: "Fix all ESLint errors in src/api.ts"
---
title: "Fix lint errors in src/utils"
prompt: "Fix all ESLint errors in src/utils.ts"{
"title": "Fix the thing",
"prompt": "Find the bug in src/auth.ts and fix it.",
"source": "sources/github/owner/repo",
"branch": "main"
}JSON array (for batch dispatch via MCP):
[
{ "title": "Task 1", "prompt": "Do thing A" },
{ "title": "Task 2", "prompt": "Do thing B" }
]The killer use case: combine jules-dispatch with Claude Code or Codex.
"I have a Node.js backend that needs to be migrated from Express to Fastify. Analyse the codebase, split the work into independent migration units, and dispatch them all to Jules in parallel using the jules-dispatch MCP tools. Then poll for completion and report back the PR URLs."
With the MCP server installed, your assistant will:
- Analyse your codebase
- Commit and push the target branch, because Jules works from the remote source branch rather than unpushed local changes
- Call
jules_dispatchwith N task definitions - Call
jules_monitorwithwait: true; if action is required, inspect withjules_interact, approve or send feedback, and monitor again - Use
jules_interactto collect terminal context and PR URLs
You get N parallel coding agents orchestrated by one strategic agent, hands-free.
jules-dispatch/
├── src/
│ ├── cli.ts CLI entry point (Commander)
│ ├── client.ts Jules REST client (retries, pagination)
│ ├── config.ts .env + task file loading
│ ├── dispatcher.ts Task dispatch logic
│ ├── collector.ts Status polling & wait
│ ├── errors.ts Structured error translation (Problem/Cause/Fix)
│ ├── output.ts Text vs JSON output mode, color detection
│ ├── init.ts Interactive init wizard
│ ├── doctor.ts Environment validation (doctor command)
│ ├── mcp.ts MCP server (15 tools + 2 optional planner tools)
│ ├── mcp-helpers.ts MCP response helpers (ok/fail/recovery hints)
│ ├── polling.ts Shared poll-with-callback engine
│ ├── tail.ts Bounded, cursor-aware activity tailing
│ ├── planner.ts Optional LLM task planner
│ ├── log.ts Verbose logging
│ └── types.ts TypeScript types
├── tasks/ Your task YAMLs live here
├── .env Generated by jules-dispatch init
└── .dispatch-logs/ JSON audit trail
npm install
npm run build # compile TypeScript → dist/
npm run dev # run CLI directly with tsx
npm run lint
npm run testMIT — see LICENSE
Built to make Google Jules actually scale.
