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How to launch a coding agent with only the key it needs with Envlatch

Run any command with selected Keychain keys injected as environment variables, nothing else exposed.

Credentials. Anyone who can run Envlatch as your user can request saved keys, so lock your Mac and review paired agents.

Who it is forA developer who keeps API keys in plain .env files across many projects.

The problemPlain-text key files leak easily and give every process every key.

The outcomeProcesses that receive exactly the named keys from the Keychain.

What you need first

  • macOS
  • Swift toolchain to build from source

Steps

  1. Install with git clone https://github.com/Raylinkh/envlatch.git, cd envlatch and ./scripts/install.sh
  2. Open the app and save your keys
  3. Run envlatch run --using ANTHROPIC_API_KEY -- claude
  4. Check setup with envlatch doctor

Prompt for your agent

With Raylinkh/envlatch, launch <command> using `envlatch run --using <KEY_NAME> -- <command>` and confirm inside the process that only that key is set in the environment.

Caveat. No code change is needed because the launched process sees normal environment variables.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for Raylinkh/envlatch and "Launch a coding agent with only the key it needs"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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