Function shouldReject

src/tools/ast/syntax-check.ts:110–114

(beforeHadErrors: boolean | null, afterHasErrors: boolean)

/** Pure: the gate decision. Reject only if the EDIT introduced the breakage. */
export function shouldReject(beforeHadErrors: boolean | null, afterHasErrors: boolean): boolean {
  if (!afterHasErrors) return false;          // new content is clean → write
  if (beforeHadErrors === true) return false; // file was already broken / grammar gap → step aside
  return true;                                // clean (or new) file would become broken → refuse
}

/** Pure: the observation the model receives on refusal. */
export function buildSyntaxRejectMessage(filePath: string, language: string, issues: SyntaxIssue[]): string {