Function matchPattern

packages/core/sdk/src/policies.ts:85–103

(pattern: string, toolId: string)

// ---------------------------------------------------------------------------

export const matchPattern = (pattern: string, toolId: string): boolean => {
  if (pattern === "*") return true;
  const patternSegments = pattern.split(".");
  const toolSegments = toolId.split(".");
  for (let i = 0; i < patternSegments.length; i++) {
    const seg = patternSegments[i]!;
    if (seg === "*") {
      // Trailing `*` is a subtree: the literal prefix already matched, so the
      // address matches at this position and anything deeper (or nothing).
      if (i === patternSegments.length - 1) return toolSegments.length >= i;
      // A non-trailing `*` consumes EXACTLY ONE segment; one must exist here.
      if (i >= toolSegments.length) return false;
      continue;
    }
    if (i >= toolSegments.length || toolSegments[i] !== seg) return false;
  }
  // Pattern exhausted with no trailing `*`: an exact match requires equal length.
  return patternSegments.length === toolSegments.length;
};

export const isValidPattern = (pattern: string): boolean => {
  if (pattern.length === 0) return false;