Parallel tool calls
Run independent read, search, and inspection calls together instead of waiting on a serial queue.
Neo Harness
Fast · Workflow-first · Open source
Built for real engineering.
Neo turns complex repository work into a visible workflow. Delegate focused tasks to subagents and keep tools, tests, reviews, and delivery moving in one terminal.
curl -fsSL https://raw.githubusercontent.com/owainlewis/neo/main/install.sh | bash~/Code/payments-api · main working
Fix reported webhook bugs and ship the change
- Create the issueCreated GitHub issue #210complete
- Create an isolated branch and worktreeRunning git worktree addin progresstoolcreating a clean workspace for the fix
- Trace and fix the bugspending
- Review the diff with a subagentpending
- Run focused testspending
- Open the pull requestpending
- Watch CI and code reviewpending
- Address valid feedbackpending
- Merge the changepending
Built for speed
Less waiting. More useful work in motion.
Neo coordinates visible workflows and focused subagents. Independent reads, searches, and inspection subagents run concurrently while writes stay serial.
Parallel subagents
Give focused workers separate jobs, run them concurrently, then return their evidence to one coordinator.
Workflow-native
See the plan, active work, tool activity, tests, and delegated tasks without reading a wall of chat.
Providers and models
Use the best model for the job.
Connect Anthropic, OpenAI, Google, or OpenRouter. Switch models for the active provider from the terminal without changing how Neo works.
AnthropicAPI key
OpenAIAPI key or subscription
Google GeminiAPI key
OpenRouterLive model catalogue
Model availability and names come from provider APIs and can change. Neo passes your configured model ID to the active provider.
From issue to merge
Follow the work from issue to merge.
Neo can inspect the issue, isolate the work, change the code, run tests, delegate review, open the pull request, and respond to feedback. The workflow stays visible from start to finish.
Works in the real repository
Start with the code, git state, project instructions, and tools your team already uses.
Proves the change
Keep tests, builds, diff review, CI, and feedback inside the same visible workflow.
Follows your rules
Load AGENTS.md, reusable skills, and optional tool confirmations for the way your team works.
Focused delegation
One coordinator. Focused workers.
Neo can start fresh subagents on focused parts of a task and return their findings to one coordinator. You can see who owns each part while runtime limits keep the work bounded.
How the agent loop worksNeoHarden webhook verificationcoordinator
01Trace request pathcomplete
02Check failure modesworking
03Review test coveragequeued
Depth, fan-out, runtime, and agent count stay capped.
The foundation
One Go binary. No runtime or plugin stack.
- Built-in tools
- Read, search, edit, write, and run shell commands without adding plugins.
- Local sessions
- Resume or search past work from session files stored on your disk.
- Open source
- Read the code that runs commands and edits files in your repository.
- No telemetry
- Neo does not send product analytics from your machine.
Neo Harness
Try Neo in a real repository.
Install the binary, connect a model provider, and run neo.