Function cleanOneOfMessage

pkg/parser/schema_errors.go:89–127

cleanOneOfMessage simplifies 'oneOf failed, none matched' error messages by: 1. Removing "got X, want Y" type-mismatch lines (from the wrong branch of a oneOf) 2. Removing the "oneOf failed, none matched" wrapper line 3. Extracting the most meaningful sub-error (e.g., enum constraint violations) Th

(message string)

//
//	"value must be one of 'claude', 'codex', 'copilot', 'gemini'"
func cleanOneOfMessage(message string) string {
	if !strings.Contains(message, "'oneOf' failed") {
		return message
	}

	schemaErrorsLog.Printf("Simplifying oneOf error message (%d lines)", strings.Count(message, "\n")+1)
	lines := strings.Split(message, "\n")
	var meaningful []string

	for _, line := range lines {
		trimmed := strings.TrimSpace(line)
		if trimmed == "" {
			continue
		}
		// Skip the "oneOf failed" wrapper line — it's schema jargon, not user guidance
		if strings.Contains(trimmed, "'oneOf' failed, none matched") {
			continue
		}
		// Skip "got X, want Y" type-mismatch lines from the wrong oneOf branch
		if isTypeConflictLine(trimmed) {
			continue
		}
		meaningful = append(meaningful, trimmed)
	}

	if len(meaningful) == 0 {
		// All sub-errors were type conflicts — synthesize a plain-English message
		// instead of returning raw JSON Schema jargon.
		return synthesizeOneOfTypeConflictMessage(lines)
	}

	// Strip "- at '/path':" prefixes and format each remaining constraint
	var cleaned []string
	for _, line := range meaningful {
		cleaned = append(cleaned, stripAtPathPrefix(line))
	}

	return strings.Join(cleaned, "; ")
}

// typeConflictGotWantPattern extracts "got X, want Y" components from type-conflict lines.
// Matches both bare "got X, want Y" and embedded "- at '/path': got X, want Y" forms.