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Tern CLI
Diagnose broken dev environments, AI coding agents, and MCP
Hey Product Hunt 👋
I built Tern CLI after repeatedly running into small environment issues that waste a surprising amount of development time.
Things like:
- missing ".env" variables
- ports already being used
- Node/package manager mismatches
- Git and deployment configuration problems
- AI coding agents that are installed but misconfigured
- broken MCP server configs
- “works on my machine, fails on VPS” situations
Tern tries to put those checks behind a simple command:
npx tern-cli doctor
For AI coding environments:
npx tern-cli agent
It supports Codex, Claude Code, Gemini CLI, OpenCode, and MCP diagnostics.
A big priority for me was privacy: the core diagnostics run locally, and AI features are opt-in. Environment variable values and credentials are not included in diagnostic reports or AI requests.
Tern is still at v0.1.0, so I’m mainly launching here to get feedback from developers using different systems and workflows.
I’d especially love feedback on:
- false positives
- missing environment checks
- CLI UX
- Windows/macOS compatibility
- AI agent & MCP detection
Thanks for checking it out!
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About Tern CLI on Product Hunt
“Diagnose broken dev environments, AI coding agents, and MCP”
Tern CLI was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #74 on the daily leaderboard. Open-source CLI that diagnoses Node.js projects, env vars, ports, Git, deployments, Codex, Claude Code, Gemini CLI, OpenCode, and MCP.
Tern CLI was featured in Developer Tools (520.4k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 115.9k products, making this a competitive space to launch in.
Who hunted Tern CLI?
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