pub fn read_oauth_access_token(config_dir: &Path) -> Option<String>Expand description
Read the Claude OAuth access token from an isolated auth dir’s
.credentials.json (claudeAiOauth.accessToken). Returns None when the
file/token is absent — notably on macOS, where the CLI stores creds in
the Keychain rather than this file (see the COMMAND_CHECK_CLI_AUTH
handler in cli_handlers.rs); resolve_access_token then tries its
other sources before falling back to the bundled catalog. Windows/Linux
keep the token here.