CoProgrammer

Shared tasks, file leases and handoffs for Codex, Claude Code and Copilot.

CoProgrammer coordinates coding agents working in separate Git worktrees. Claim scoped tasks atomically, spot blocked work, exchange durable handoffs, and turn branch changes into reviewable digests through a local CLI and MCP server. Python 3.10+, Git 2.36+, no runtime Python dependencies.

Use Codex, Claude Code, or GitHub Copilot for development, GitHub for PR review, and optionally Claude, GLM, or DeepSeek for a second opinion on a specific set of commits. Maintainers decide what reaches main.

简体中文 · Run the demo · Connect a client · Ecosystem comparison · Contributing · MIT

0.2.0a1 source preview. The multi-platform upgrade is available in PR #1. Client configuration generators and provider adapters are implemented; live client/provider verification is still pending. Use the source setup below.

New in this source update

• One-command offline demo: two real Git worktrees exercise claims, dependency and path guards, message receipt and task completion. No model key.
• One collaboration briefing: ready work, blockers, stale windows, open decisions and next actions, available through both CLI and MCP.
• Less repeated state replay: status views reuse validation within a snapshot, while transactions and standalone history checks stay intact. See the reproducible benchmark.
• A complete Chinese entrypoint and a six-project research update explaining the choices behind this increment.

When it helps

Suppose Codex is changing an API while Claude Code updates its callers in another worktree. Both branches may pass their own tests while disagreeing on the interface. A clean Git merge alone does not resolve that disagreement.

CoProgrammer gives the team a shared record:

Task scope → shared work state → branch digest → integration plan
                                                       ↓
                                      maintainer review + project CI

The local CLI, MCP server and GitHub Action use the same core. Leases coordinate cooperating agents; they do not lock files. Integration plans remain drafts: patch application, approval and merging stay with your existing review process.

Try the preview

Requires Python 3.10+ and Git 2.36+. Start with the offline demo; no model key is needed.

git clone --branch codex/multi-platform-upgrade https://github.com/QIU-Guanzong/CoProgrammer.git
cd CoProgrammer
python3 -m venv .venv
source .venv/bin/activate
python -m pip install -e .

coprogrammer demo

On Windows, create the environment with python -m venv .venv and activate it in PowerShell with .venv/Scripts/Activate.ps1. The clone command above selects the upgrade branch explicitly. For your own project, keep this environment active, change to that project's checkout, and use its base branch.

The demo creates and cleans up a temporary repository and two worktrees. It exercises the actual coordination code; the Codex/Claude names are local session labels, not connected coding clients. Use coprogrammer demo --json for step-by-step evidence. See what the demo checks.

Then inspect your own repository:

coprogrammer integrations doctor
coprogrammer manager briefing
coprogrammer digest --base origin/main --head HEAD

doctor checks local tools and credential-variable presence without contacting providers. briefing summarizes current local coordination. digest produces a Markdown report; add --language zh-CN for Chinese output. Choose your own repository's base branch when it differs from origin/main.

Read the room before editing

coprogrammer manager briefing --session codex-api
coprogrammer manager briefing --json --limit 20 --fail-on-attention

Register the session first (below), or omit --session for a repository-wide summary. The briefing explains blocked tasks and suggests the next checks. Its MCP equivalent is manager_briefing. Message bodies and claim tokens are omitted; counts remain complete when rows are truncated. A ready task still needs a successful claim. Briefing semantics and exit codes.

Where it fits

CoProgrammer connects independent coding windows to the project's existing review process. It complements tools that manage specifications, task memory or terminal sessions.

The source-backed comparison covers Beads, MCP Agent Mail, Overstory, agent-deck, GitHub Spec Kit and LangGraph, including current maintenance and license observations. It is a comparison, not a claim that those tools are installed or interoperable out of the box.

Connect your tools

From the project you want to coordinate, generate the configuration for your client:

coprogrammer integrations config --client codex
# Other clients: --client claude or --client copilot

coprogrammer manager lease request --holder codex-api --pattern 'src/api/**'
coprogrammer manager heartbeat --agent codex-api --task 'Update API response'
coprogrammer manager status

Configuration is printed for you to add to the client; existing settings are not overwritten. The local MCP server exposes branch digests, status, conflict forecasts, leases, heartbeats, contract proposals, window sessions, task dispatch, discussions and bounded change waiting. Git worktrees share the repository's local coordination log by default.

Coordinate two coding windows

To add reusable workflows and project guidance before starting the windows:

coprogrammer knowledge list
coprogrammer setup --client codex --include-content  # preview only
coprogrammer setup --client codex --apply

Use claude or copilot for those clients. Setup includes six Skills, Markdown instructions and task/handoff templates, plus native MCP configuration. It creates missing files, preserves existing project instructions, and refuses conflicting skills, generated documents or MCP settings. Use --no-mcp when keeping existing configuration and integrating the server separately.

The MCP server also exposes twelve bundled Markdown resources and two prompt templates for task briefs and handoffs. Resources are read-only catalog entries; prompts prepare document context and do not execute tasks. Setup does not prove the client connected. See the setup and knowledge guide for native paths, conflict handling and connection verification.

After installing the preview, run each block in that window's existing Git worktree. Each window gets a unique session ID, even if both use the same client.

# Window A: Codex, API worktree
coprogrammer manager session register --session codex-api --client codex --task API-42

# Window B: Claude Code, UI worktree
coprogrammer manager session register --session claude-ui --client claude --task API-42

From window A, save a handoff; from window B, read it:

# Window A
coprogrammer manager message send --from codex-api --to claude-ui \
  --task API-42 --kind handoff --key api-handoff-v1 \
  --body 'API changes are ready for review. Check the caller and report the checks you ran.'

# Window B
coprogrammer manager sync --session claude-ui
coprogrammer manager message inbox --session claude-ui --task API-42
# Replace msg_... with the returned message ID.
coprogrammer manager message ack --session claude-ui --id msg_...

Use session pulse to report progress or blockers, and manager sync --after evt_... to resume from the previous next_cursor. Unacknowledged messages remain in the inbox after restart. Identical sends with the same sender and --key return the original message. Replies use --reply-to msg_....

These operations also have MCP tools. Sessions carry optional provider/model labels, so an OpenCode or other MCP-capable client using GLM or DeepSeek can use the same workflow. Labels do not verify a provider connection. Freshness measures explicit pulses, not whether a process is alive. Messages are local and pulled by clients; they do not wake or inject text into another window. Receipt never approves code or transfers a lease. See the full workflow and limits and comparison with Agent Mail, agent-deck, Overstory and Claude Teams.

Dispatch work without conflicting owners

In a registered window, create a task with its allowed paths and optional dependencies or client labels. A worker claims a compatible ready task:

coprogrammer manager task create --session codex-api --id api-v2 \
  --title 'Update the API response' --pattern 'src/api/**' --client codex
coprogrammer manager task claim --session codex-api --id api-v2
# Save the returned claim_id and substitute it below.
coprogrammer manager task guard --session codex-api --id api-v2 \
  --claim claim_... --file src/api/routes.py
coprogrammer manager task board

Claiming atomically reserves the paths. Competing tasks, unfinished dependencies, stale windows and another task in the same worktree block the claim. Use separate worktrees for parallel development. Before committing, run the guard with --working-tree to check staged, unstaged and untracked nonignored paths, including both sides of renames. Renew long-running claims with task renew.

Use task finish with an accurate work summary to release the lease, or task release to requeue. An expired claim needs explicit creator recovery; it never silently moves to a new owner. Guards are cooperative checks and do not intercept arbitrary writes. Completion does not certify tests or approval.

After draining manager sync, use manager wait --session claude-ui --after evt_... for a bounded wait, and manager message thread --session claude-ui --task api-v2 for the task conversation. See the complete CLI/MCP workflow, recovery and platform limits.

Request and compare model reviews

To preview an optional review request locally:

coprogrammer review --provider deepseek --model YOUR_MODEL_ID \
  --base origin/main --head HEAD

Replace YOUR_MODEL_ID with an available model from your provider. Review commands contact the provider only when you add --send; this sends the captured diff and may incur provider charges. Model advice is distinct from a maintainer approval. See the multi-platform guide for credentials, request limits, client setup and draft plan generation.

After saving review artifacts, compare them locally against the same commits:

coprogrammer review-summary --base origin/main --head HEAD \
  --review claude=.coprogrammer/claude-review.json \
  --review glm=.coprogrammer/glm-review.json \
  --expect deepseek --format markdown

Missing files and expected reviewers stay visible. The summary checks recorded evidence, preserves risks and conflicting recommendations, and never calls a provider or selects a winning review. Reviewer identity and independence are not authenticated. The same read-only operation is available through the review_summary MCP tool. See the review summary guide.

Build a shared workflow

Assign roles by task, independently of which model or client performs them. Each handoff should name the goal, scope, base/head commits, checks actually run, unresolved questions and next owner. Keep review disagreements visible.

We draw on gstack's explicit planning, review and verification stages, alongside GitHub's maintainer review model. For CoProgrammer, that means portable artifacts and checks tied to the code being reviewed. See the design notes and sources and contributor handoff checklist.

Documentation

The repository contains implemented tooling and research proposals. In design documents, sections marked "future" describe planned work. A hosted Manager, automatic patch reconstruction and automatic merging are outside this preview.

Contribute

Useful contributions include reproducible coordination failures, client setup reports, focused fixes and evidence from real PRs. Start with a small issue or change that explains the problem, expected behavior and validation.

python -m unittest discover -s tests
coprogrammer config validate

Read CONTRIBUTING.md for development rules and review artifacts. Source code is under MIT.