parsePromptOverrideMap function

Map<String, String> parsePromptOverrideMap(Object? node)

Validates the raw prompts: yaml section into a prompt name → raw source map (values stay raw: a file path or inline text — classified later, at file-resolution time).

Strict, like the roles:/ttsr: sections: a non-map section, a non-string or empty value, an unknown prompt name, or systemPromptAlias given together with codeModePromptName throws ConfigException instead of silently dropping the section. A null node (absent section) yields an empty map.

Implementation

Map<String, String> parsePromptOverrideMap(Object? node) {
  if (node == null) return const {};
  if (node is! Map) {
    throw ConfigException(
      '"prompts" must be a map of prompt name → file path or inline text',
    );
  }
  final result = <String, String>{};
  for (final entry in node.entries) {
    final name = entry.key;
    final value = entry.value;
    if (name is! String || !overridablePromptNames.containsKey(name)) {
      throw ConfigException(
        'unknown prompt override "$name" — supported names: '
        '${overridablePromptNames.keys.join(', ')}',
      );
    }
    if (value is! String || value.trim().isEmpty) {
      throw ConfigException(
        '"prompts.$name" must be a non-empty string '
        '(a file path or inline text)',
      );
    }
    result[name] = value;
  }
  if (result.containsKey(systemPromptAlias) &&
      result.containsKey(codeModePromptName)) {
    throw ConfigException(
      '"prompts" maps both "$systemPromptAlias" and "$codeModePromptName" — '
      'they are aliases for the same prompt; keep only one',
    );
  }
  return result;
}