Module detect 

AI CLI detection.

Scans PATH for known AI coding CLI binaries and merges with custom CLIs from the user’s configuration. Provides the combined list for interactive selection or direct use.

Thread-Safe Architecture

This module uses a thread-safe approach for PATH-based command resolution:

1. No Global Environment Mutation: Unlike the previous implementation that used unsafe { std::env::set_var("PATH", ...) }, this version never modifies the global environment.

2. Process-Isolated PATH: The resolve_command_in function and related internal functions use std::process::Command::env() to set PATH only for individual process executions. This ensures thread safety and allows true parallel test execution.

3. Test Parallelization: All tests can run in parallel without #[serial_test::serial] attributes because there’s no shared mutable state.

4. Robust PATH Construction: When testing with custom PATH directories, the implementation automatically includes system paths (/usr/bin:/bin:/usr/local/bin) to ensure the which command itself can be found.

Structs

CliInfo

Information about an available AI CLI.

CustomCliDef

A custom CLI definition provided by the user’s configuration.

Enums

CliSource

How a CLI was discovered.

Functions

detect_clis

Detects all available AI CLIs by combining auto-detected and custom CLIs.

detect_known_clis

Scans PATH for known AI CLI binaries.

resolve_custom_clis

Resolves custom CLI definitions to CliInfo entries.