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git-arc

v1.1.0

Published

Git-native decentralized task tracker.

Vulnerabilities

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Links

Git

Maintainers

jercikjercik

Keywords

gittrackertasksclidecentralizeddag

Readme

git-arc

Git-native decentralized task tracker. All state lives inside Git objects under refs/tracker/main, completely separate from your branches, working tree, and CI. Tasks form a directed acyclic graph with typed edges, synced between repositories via standard git push/git fetch.

Requirements

  • Node.js >= 22.14.0
  • Git >= 2.38 (git merge-tree --write-tree support)
  • Self-hosted Git server for server-side validation (GitHub/GitLab SaaS do not support custom pre-receive hooks)

Install

npm install -g git-arc

Quick start

# Initialize the tracker in an existing repo
git arc init

# Create tasks
git arc task create "Design authentication flow"
git arc task create "Implement login endpoint"

# Link tasks with directed edges
git arc edge add blocks <task-a-id> <task-b-id>

# Add comments
git arc comment add <task-id> "Decided to use JWT"

# Sync with remote
git arc push
git arc pull

Commands

Core

| Command | Description | | ----------------------- | ------------------------------------------------- | | git arc init | Initialize the tracker, configure fetch refspec | | git arc validate | Check all invariants against the current tree | | git arc push [remote] | Validate locally, then push to remote | | git arc pull [remote] | Fetch, fast-forward or 3-way merge reconciliation |

Tasks

| Command | Description | | ----------------------------- | ----------------------------------------------------------------- | | git arc task create <title> | Create a task (-p priority, -b body) | | git arc task list | List tasks (-a includes deleted) | | git arc task show <id> | Show task details | | git arc task update <id> | Update fields (-t title, -s status, -p priority, -b body) | | git arc task delete <id> | Soft-delete (tombstone) |

Edges

| Command | Description | | ---------------------------------------- | ----------------------------------------------- | | git arc edge add <type> <from> <to> | Add a directed edge (e.g. blocks) | | git arc edge remove <type> <from> <to> | Remove an edge | | git arc edge list | List edges (--from, --to, --type filters) |

Comments

| Command | Description | | ----------------------------------------------- | ------------------------------------- | | git arc comment add <task-id> <body> | Add a comment to a task | | git arc comment list <task-id> | List comments (-a includes deleted) | | git arc comment delete <task-id> <comment-id> | Soft-delete (tombstone) |

Storage model

All data is stored as Git objects under refs/tracker/main. No working-tree checkout is needed — reads and writes use Git plumbing (ls-tree, hash-object, mktree, commit-tree, update-ref).

tasks/
  <uuid>.md              # YAML frontmatter + Markdown body
edges/
  <type>__<from>__<to>   # Zero-byte file, identity encoded in filename
comments/
  <task-id>/
    <uuid>.md            # Markdown body, optional frontmatter for deletion
  • Tasks and comments are soft-deleted (tombstoned with deleted: true in frontmatter)
  • Edges are hard-deleted (file removed)
  • IDs are UUID v7 (lexicographic order = chronological order)

Validation

Four invariants are enforced both client-side (git arc validate, git arc push) and server-side (pre-receive hook):

  1. Parse validity — all files parse as valid YAML frontmatter + Markdown
  2. Referential integrity — all edges and comments reference existing tasks
  3. DAG acyclicity — no cycles among non-deleted tasks
  4. Edge uniqueness — no duplicate (type, from, to) tuples

Sync

Pushes must be fast-forward. When two agents diverge, git arc pull reconciles via git merge-tree --write-tree (3-way merge), validates the result, and commits. The agent then pushes again.

Server-side validation (pre-receive hook)

Install a pre-receive hook on your bare repository to enforce invariants on every push:

# In your bare repo
cat > hooks/pre-receive << 'EOF'
#!/bin/sh
exec git-arc hook pre-receive
EOF
chmod +x hooks/pre-receive

The hook validates the proposed tree for any push targeting refs/tracker/main. Invalid state (dangling references, cycles, parse errors) is rejected with descriptive error messages. Deletion of the tracker ref is also rejected.