Method checkToolCall

src/session/tdd_state.js:406–424

(toolName, toolArgs)

  // ─── Guards ────────────────────────────────────────────────────────────────

  checkToolCall(toolName, toolArgs) {
    if (this.disabled || this._phase === PHASES.IDLE) return null;
    const isWrite = toolName === 'write_file' || toolName === 'patch'
      || toolName === 'append_file' || toolName === 'read_and_patch';
    if (!isWrite) return null;

    const filePath = toolArgs && (toolArgs.path || '');
    const isTestFile = _isTestFile(filePath);

    if (this._phase === PHASES.RED && !this._redConfirmed && !isTestFile) {
      return `[TDD-GATE] RED phase — NOT YET confirmed red. Call run_tests (test_filter="${this._targetTest}") first to confirm this test fails. Do not write implementation yet.`;
    }

    if (this._phase === PHASES.GREEN && isTestFile) {
      return `[TDD-GATE] GREEN phase — do NOT modify test files. Edit only implementation files. To change the test, call tdd_reset and start a new cycle.`;
    }

    return null;
  }

  // ─── Internal ──────────────────────────────────────────────────────────────