Method isPathExcluded

internal/diff/git.go:257–287

isPathExcluded returns true when the given relative file path should be skipped based on hardcoded dir rules or .gitignore patterns. Patterns are resolved the way git resolves them: in file order, with the LAST matching pattern deciding, and a leading "!" inverting that pattern's verdict. Order mat

(relPath string, gitignorePatterns []string)

// correct under last-match-wins. Treating negations as unmatchable made every
// file in such a repository look excluded, so a review silently covered nothing.
func (p *Provider) isPathExcluded(relPath string, gitignorePatterns []string) bool {
	// Hardcoded directory prefix checks. These are an unconditional blocklist:
	// a .gitignore negation cannot re-admit .git/ or node_modules/.
	for _, prefix := range providerDirIgnoreDirs {
		dirPart := strings.TrimSuffix(prefix, "/")
		if relPath == dirPart || strings.HasPrefix(relPath, prefix) {
			return true
		}
	}

	excluded := false
	for _, pat := range gitignorePatterns {
		body, negated := strings.CutPrefix(pat, "!")
		if body == "" {
			continue
		}

		// Directory-only patterns (trailing "/") apply to directories, never to
		// files. Git uses a negated one such as `!*/` to keep descending into
		// subdirectories, not to re-admit the files inside them — honouring it
		// here would readmit everything below the root.
		if negated && strings.HasSuffix(body, "/") {
			continue
		}

		if matchGitignoreBody(relPath, body) {
			excluded = !negated
		}
	}
	return excluded
}

// matchGitignorePattern checks if relPath matches a single .gitignore pattern.
//