Agent coordination protocol for shared codebases

Agent coordination protocol for shared codebases

Declare intents. Lock symbols. Detect conflicts. Before code is written.

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Wit coordinates multiple AI coding agents working on the same repository simultaneously. It sits between your agents and git — git handles version control, Wit prevents the conflicts.

The name comes from the word itself: the intelligence to coordinate before colliding. It also stands for Workspace Intent Tracker.

The Problem

You have three Claude Code instances (or Cursor, Copilot, Devin — any combination) working on the same repo. Without coordination, they each write code independently and produce merge conflicts that waste time and break work.

Git detects conflicts after they happen. Wit prevents them before code is written.

How It Works

Wit runs a lightweight daemon in the background. Agents communicate with it over a Unix socket using JSON-RPC. The daemon tracks four things:

Primitive	What it does	Example
Intents	Agent announces planned work scope	"I'm refactoring the auth module"
Locks	Agent reserves a specific function/type/class	Lock src/auth.ts:validateToken
Conflicts	Daemon warns when intents or locks overlap	"Agent B also declared intent on auth.ts"
Contracts	Agents agree on function signatures	"validateToken accepts string, returns boolean"

Intents and locks are warnings, not blocks. Agents always get to decide what to do. The only hard enforcement is contracts — a git pre-commit hook blocks commits that violate an accepted contract signature.

Quick Start

Prerequisites

Wit requires Bun (v1.0+). It uses Bun-native APIs for the daemon, SQLite, and process management. Install Bun if you don't have it:

curl -fsSL https://bun.sh/install | bash

Install the CLI

From npm:

bun install -g wit-protocol

From source:

git clone https://github.com/amaar-mc/wit.git
cd wit
bun install
bun link

After either method, the wit command is available globally.

Initialize in your repo

cd your-project
wit init

This creates a .wit/ directory, starts the daemon, and generates a CLAUDE.md with coordination instructions. You only run this once per project — the daemon auto-starts on subsequent commands.

Every Claude Code session in this project will now automatically read the CLAUDE.md and follow the coordination protocol. Agents declare intents, lock symbols, and respect conflicts without any manual setup.

Basic workflow

# See what's happening
wit status

# Declare intent before working
wit declare --description "Adding rate limiting to API" --files src/api.ts --files src/middleware.ts

# Lock a specific function you're about to modify
wit lock --symbol "src/api.ts:handleRequest"

# Check status — your intent and lock are visible to all agents
wit status

# Release when done
wit release --symbol "src/api.ts:handleRequest"

# Watch live updates (like htop for coordination)
wit watch

What agents see

When Agent B tries to work in an area Agent A has claimed:

# Agent B declares intent on the same file
$ wit declare --description "Fixing auth bug" --files src/api.ts

# Response includes conflict warning:
# {
#   "intentId": "abc-123",
#   "conflicts": {
#     "hasConflicts": true,
#     "items": [{
#       "type": "INTENT_OVERLAP",
#       "message": "Agent A has active intent on src/api.ts"
#     }]
#   }
# }

Agent B sees the warning, checks what Agent A is doing, and chooses to work on a different part of the codebase.

Claude Code Plugin

Wit ships as a Claude Code plugin. Once installed, agents automatically declare intents and lock symbols before editing — no manual configuration.

Step 1: Add the Wit marketplace (one-time)

/plugin marketplace add amaar-mc/wit

Step 2: Install the plugin

/plugin install wit@amaar-mc-wit

Step 3: Make sure the CLI is installed (see Install the CLI above)

Step 4: Initialize Wit in your project

wit init

That's it. Every Claude Code instance in the project now coordinates automatically.

What the plugin provides:

• wit:coordinate skill — Instructs agents to declare intents and acquire locks before editing code. Activates automatically when .wit/ exists.
• Session hook — On session start, loads current coordination state so agents immediately see what other agents are working on.

Without Claude Code: Wit works with any AI agent that can run shell commands. Add instructions to your agent's system prompt to call wit declare, wit lock, wit status, and wit release. See the Protocol Specification for the raw JSON-RPC API.

Commands

Command	What it does
wit init	Create .wit/, start daemon, generate session ID
wit status	Show all active intents, locks, contracts, and conflicts
wit declare	Announce intent to work on files/symbols
wit lock	Acquire a semantic lock on a specific symbol
wit release	Release a held lock
wit watch	Live dashboard of coordination state
wit hook install	Install git hooks for contract enforcement and intent tracking

All commands support --json for machine-readable output.

Semantic Locking

Wit doesn't lock files — it locks symbols. A symbol is a function, class, type, or export identified by its path:

src/auth.ts:validateToken      # a function
src/models.ts:User             # a type/class
src/utils.py:calculate_score   # a Python function
src/utils.py:RateLimiter       # a Python class

Wit uses Tree-sitter WASM grammars to parse your code and identify symbol boundaries — the exact byte range of each function, class, and type. Two agents can safely work on different functions in the same file.

Supported languages: TypeScript, JavaScript, Python.

Conflict Detection

When an agent declares an intent, Wit runs three checks:

Check	What it catches
Intent Overlap	Two agents targeting the same code region
Lock Intersection	Intent targets a symbol locked by another agent
Dependency Chain	Intent targets a caller of a locked symbol

All conflicts are warnings. The intent still succeeds. The agent decides what to do.

Contracts

Agents can agree on function signatures. Once accepted, a git pre-commit hook enforces the contract — commits that change the agreed signature are blocked.

# Install enforcement hooks
wit hook install

# Now if an accepted contract's signature changes, the commit is rejected
git commit -m "changed params"
# ERROR: Contract violation — src/auth.ts:validateToken signature changed

Contracts are propose/accept/reject. No counter-proposals in v1.

Intent-to-Commit Tracking

wit hook install also installs a prepare-commit-msg hook. Active intents are linked to commits via git trailers:

feat: add rate limiting

Wit-Intent: abc-123-def-456

Architecture

+-----------+    +-----------+    +-----------+
| Claude A  |    | Cursor B  |    | Copilot C |
+-----+-----+    +-----+-----+    +-----+-----+
      |                |                |
      |   JSON-RPC over Unix socket    |
      |                |                |
      +--------+-------+----------------+
               |
         +-----+------+
         | Wit Daemon  |
         |             |
         |  Hono HTTP  |
         |  SQLite WAL |
         |  Tree-sitter|
         +-----+------+
               |
         .wit/daemon.sock
         .wit/state.db

• Daemon: Bun process, Hono HTTP server, Unix domain socket
• Storage: SQLite with WAL mode for concurrent agent access
• Parsing: Tree-sitter WASM grammars (zero native dependencies, no build step)
• CLI: Clipanion, auto-starts daemon on first use
• Protocol: JSON-RPC 2.0 with witVersion field for version negotiation

Protocol Specification

Wit exposes 12 JSON-RPC methods for agent coordination. Full spec in two formats:

• docs/PROTOCOL.md — Human-readable with request/response examples for every method
• docs/openrpc.json — Machine-readable OpenRPC 1.4.0 schema

Any AI coding tool that can POST JSON to a Unix socket or run a shell command can participate in the coordination protocol. Build your own integration using the spec.

.wit/ Directory

File	Purpose
daemon.sock	Unix domain socket for JSON-RPC communication
daemon.pid	Daemon PID for lifecycle management and crash recovery
state.db	SQLite database with WAL mode for concurrent access
session.id	Stable session identifier for agent tracking

Add .wit/ to your .gitignore.

Supported Languages

Wit uses Tree-sitter WASM grammars to parse source code at the AST level. Currently supported:

• TypeScript / JavaScript (functions, arrow functions, methods, types, interfaces, classes)
• Python (functions, classes)

Adding a new language is straightforward. See issue #1 (Go), #2 (Rust), or #4 (Java/Kotlin) for examples of what's involved.

Limitations (v1)

• Single machine only (no network coordination between remote agents)
• TypeScript/JavaScript and Python (more languages planned, architecture is extensible)
• CLI and API only (no GUI or dashboard beyond wit watch)
• Warnings only (locks and conflicts never block, except contract enforcement)
• Bun runtime required (standalone binary planned, see #10)

Contributing

Wit is open source and contributions are welcome. Good places to start:

• Good first issues — language support, CLI improvements, documentation
• Help wanted — MCP server, Windows support, standalone binary

git clone https://github.com/amaar-mc/wit.git
cd wit
bun install
bun test

License

MIT

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