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Tern CLI
Diagnose broken dev environments, AI coding agents, and MCP
Open-source CLI that diagnoses Node.js projects, env vars, ports, Git, deployments, Codex, Claude Code, Gemini CLI, OpenCode, 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!
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.
On the analytics side, Tern CLI competes within Developer Tools and GitHub — topics that collectively have 561.8k followers on Product Hunt. The dashboard above tracks how Tern CLI performed against the three products that launched closest to it on the same day.
Who hunted Tern CLI?
Tern CLI was hunted by New User. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Tern CLI including community comment highlights and product details, visit the product overview.
New User