Detect which AI coding agent is invoking gh by checking well-known
environment variables and include the agent name in the User-Agent
header sent to GitHub APIs.
Supported agents: Codex, Gemini CLI, Copilot CLI, OpenCode,
Claude Code, and Amp. Generic AI_AGENT env var is also supported
with validation to prevent header injection.
Fixesgithub/cli#1111
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit expands the in-line docs around updaterEnabled package variable used to affect release checking.
Along with clarifying specific details discovered when talking with @williammartin, I'm also removing a useless local variable.
This commit is a bit of refactoring to bring the extension update checking logic up to par with what is done with `gh` including creation of state file per extension and listening to env vars for disabling version checking.
This work is not complete as it does not address necessary test changes.
