Function pickToolByPriority

internal/sessions/session_injection.go:165–193

pickToolByPriority checks a priority list first, then falls back to the first tool whose lowercased name matches the given predicate function.

(sess *Session, priority []string, fallbackMatch func(string) bool)

// pickToolByPriority checks a priority list first, then falls back to the first tool
// whose lowercased name matches the given predicate function.
func pickToolByPriority(sess *Session, priority []string, fallbackMatch func(string) bool) string {
	if sess == nil {
		return ""
	}
	sess.mu.Lock()
	tools := make([]observedtools.ObservedTool, len(sess.Tools))
	copy(tools, sess.Tools)
	sess.mu.Unlock()

	nameSet := make(map[string]bool, len(tools))
	for _, t := range tools {
		nameSet[t.Name] = true
	}

	for _, name := range priority {
		if nameSet[name] {
			return name
		}
	}

	// Fallback: first tool matching the predicate.
	for _, t := range tools {
		if fallbackMatch(strings.ToLower(t.Name)) {
			return t.Name
		}
	}

	return ""
}

// BuildReadArguments constructs the arguments map for a file-read tool invocation.
func BuildReadArguments(sess *Session, toolName, filePath string) map[string]any {