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External agent plugins are discovered through executable naming and $PATH lookup:
  1. You create an executable named entire-agent-<name>
  2. Place it anywhere on your $PATH
  3. The CLI discovers it at startup and registers it as a new agent
The plugin communicates with the CLI through subcommands that read/write JSON over stdin/stdout. Each invocation is stateless. Every subcommand invocation receives these environment variables: The working directory is always set to the repository root. The plugin follows these conventions:
  • Output: JSON on stdout (unless noted otherwise)
  • Errors: Non-zero exit code + message on stderr
  • Stateless: Each invocation is independent, no persistent connection