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>
The assertions should check for header values instead of single string,
because when getting a single header value, we get an empty string if
the header is not set or is set to an empty string. So, to make sure a
header is not set we should check the `Values` slice which is `nil` only
if the header is missing.
Signed-off-by: Babak K. Shandiz <babakks@github.com>
This commit replaces `os.Setenv` with `t.Setenv` in tests. The
environment variable is automatically restored to its original value
when the test and all its subtests complete.
Reference: https://pkg.go.dev/testing#T.Setenv
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
