naxe 0.1.0

Dependency-aware task graph engine for AI agents (MCP server)

Naxe

A local-first MCP server that acts as a dependency-aware task graph engine for AI agents. Agents write tasks with dependencies; the engine surfaces only the tasks that are actionable right now.

Core insight: agents shouldn't have to reason about what they can do — only what they should do.

Install

uv tool install '/path/to/naxe[postgres]'

This makes naxe, naxe-init, naxe-config, and naxe-ui available globally. Replace /path/to/naxe with the path where you cloned this repo.

For development (editable install with test deps):

uv sync

Quick Start

1. Run the setup wizard

naxe-init

This walks you through database selection (SQLite or PostgreSQL), tests the connection, optionally registers an agent, and prints the exact claude mcp add command to paste into your shell.

Or configure manually (after uv tool install):

claude mcp add --scope user --transport stdio naxe \
  --env NAXE_DB_URL=postgresql://user:pass@localhost/naxe \
  --env NAXE_API_KEY=naxe_sk_... \
  -- naxe

Omit --env NAXE_API_KEY if running in open mode (no registered agents). --scope user makes the MCP available in all your projects.

2. Start using it

In a Claude Code session, ask Claude to use Naxe for multi-step tasks:

"Use Naxe to track this refactor. Create a job with tasks for each step."

Claude will call create_job and add_tasks to plan the work, then work through tasks using claim_task and complete_task.

Database

Naxe supports two backends:

SQLite (default — zero setup)

A naxe.db file is created in the working directory automatically. Good for personal use and ephemeral agent sessions.

# Override the path
export NAXE_DB_PATH=/path/to/my.db
# Or use a full URL
export NAXE_DB_URL=./naxe.db

PostgreSQL (recommended for multi-agent or shared use)

Install the PostgreSQL extra:

uv sync --extra postgres
# or: pip install 'naxe[postgres]'

Then point naxe at your database:

export NAXE_DB_URL=postgresql://user:pass@localhost/naxe

Or store it permanently:

naxe-config set-url postgresql://user:pass@localhost/naxe

PostgreSQL is the right choice when:

• Multiple agents run concurrently against the same job graph
• You want the task history to persist across machine restarts
• You're running a team setup where multiple people share one naxe instance

Note: SQLite is single-writer by design. For multiple concurrent agents writing tasks, use PostgreSQL.

Authentication

By default, naxe runs in open mode — any caller is accepted and agent_id is self-reported. This is fine for personal local use.

To enforce identity and access control, register agents with API keys:

# Register an agent (first registration requires no key)
naxe-config register-agent my-agent
# → Key: naxe_sk_...   Store this — it will not be shown again.

# Add the key to your MCP config
claude mcp remove naxe
claude mcp add --scope user --transport stdio naxe \
  --env NAXE_API_KEY=naxe_sk_... \
  -- naxe

Once any agent is registered, naxe enforces NAXE_API_KEY on every connection. The key carries the agent's identity — all tool calls are attributed to the registered name regardless of what the caller passes as agent_id.

Managing agents

naxe-config list-agents           # Show all registered agents and their status
naxe-config revoke-agent <name>   # Revoke an agent's key
naxe-config register-agent <name> # Register a new agent (requires NAXE_API_KEY if others exist)

When to use auth

Use case	Recommendation
Personal local use	Open mode (no keys needed)
Ephemeral agent sessions	Open mode (each agent owns its own naxe instance)
Multi-agent, shared PostgreSQL	Register each agent with a key
Team / shared deployment	Register each user/agent with a key

Configuration

naxe-config get-url          # Show current DB URL and where it came from
naxe-config set-url <url>    # Save a DB URL to ~/.config/naxe/config
naxe-config get-theme        # Show current TUI theme
naxe-config set-theme <name> # Save theme (built-in: naxe, naxe-bold)

Environment variables take precedence over config files:

Variable	Purpose
NAXE_DB_URL	Full database URL (postgresql:// or file path)
NAXE_DB_PATH	SQLite file path shorthand
NAXE_API_KEY	Agent API key for authenticated deployments
NAXE_THEME	TUI theme name

Tools

Naxe exposes 33 MCP tools grouped by function:

Job lifecycle

Tool	Description
create_job	Create a new task graph job
get_job_status	Full snapshot: all tasks, progress counters, blocking jobs
list_jobs	List jobs with per-job progress summaries
edit_job	Rename a job
cancel_job	Cancel a job and all pending tasks atomically
pause_job	Pause a job (no new claims until resumed)
resume_job	Resume a paused job
add_job_dependency	Declare that one job must complete before another starts
set_job_concurrency	Set or clear a max concurrent agent limit
set_worktree_paths	Store git worktree paths keyed by repo

Task execution

Tool	Description
add_tasks	Add tasks with dependencies. job_id is optional — omit it to auto-create a job.
get_next_actions	Return all currently unblocked tasks (orchestrator use)
claim_task	Atomically claim a specific task
claim_next_action	Atomically find and claim the next unblocked task (worker use)
complete_task	Mark done; returns newly unblocked tasks
fail_task	Mark failed with optional reason and output
heartbeat_task	Prevent a long-running task from being reclaimed as stale
update_task_progress	Report 0–100 progress on a task you own
cancel_task	Cancel a single pending or in-progress task
edit_task	Edit metadata or dependencies of a pending task
requeue_task	Reset a failed or cancelled task back to pending

Approval workflow

Tool	Description
request_approval	Transition an in-progress task to awaiting_approval
approve_task	Approve a task, marking it complete and unblocking dependents
reject_task	Hard-fail a task awaiting approval
return_task	Return a task to pending with feedback for the agent

Comments & audit

Tool	Description
add_task_comment	Add a comment to a task (agent or human)
get_task_comments	Retrieve comment history, optionally by approval round
get_task_events	Full event history for a single task
get_job_audit_trail	All events across every task in a job
get_blocked_tasks	List pending tasks blocked by incomplete dependencies

Templates

Tool	Description
create_job_template	Save a reusable task graph as a named template
list_templates	List all saved templates
instantiate_template	Create a new job from a template

TUI

Naxe includes an interactive terminal UI for browsing jobs and tasks:

naxe-ui

Keyboard shortcuts: Enter open job, A approval queue, N new job, E edit, X cancel, P pause/resume, F cycle filter, Q quit.

Design notes

• SQLite is single-writer. Concurrent agents reading is fine; concurrent writes will serialize. Use PostgreSQL for true multi-agent parallelism.
• Authentication is optional. Open mode (no registered agents) is the zero-config default. Once any agent is registered, all connections require a valid key.
• agent_id is server-enforced when auth is enabled. With a registered key, the server ignores whatever agent_id the caller passes and uses the registered name instead. The audit trail is trustworthy.
• Pre-1.0: breaking schema changes will require dropping and recreating the database. A proper migration system will be added before 1.0.

Run Tests

uv run pytest tests/ -v