git

func HeadSHA ¶

func HeadSHA(repoRoot string) string

HeadSHA returns the current HEAD commit SHA in the given repo. Returns "" if git is unavailable, repoRoot is not a git repo, or the repo has no commits yet. Never returns an error — callers treat "" as "git unavailable" and skip commit tracking gracefully.

func LogSince ¶

func LogSince(repoRoot, startCommit string) []string

LogSince returns a slice of short commit descriptions (e.g. "a1b2c3d fix: typo") for all commits reachable from HEAD that are NOT reachable from startCommit. This is the set of commits made after startCommit became HEAD.

Returns nil when:

• repoRoot or startCommit is empty
• git is not installed or repoRoot is not a git repo
• startCommit is no longer in history (rebase/force-push) — rebase-safe
• no commits exist since startCommit

Note: commits are repo-wide. In multi-agent scenarios, commits from other agents working in the same repo are included. Git provides no per-agent isolation — this is the correct tradeoff.