Method confirmRed

src/session/tdd_state.js:243–266

(testResult)

  }

  confirmRed(testResult) {
    if (this.disabled) return { ok: true, phase: 'idle', message: 'TDD gating disabled.' };
    if (this._phase !== PHASES.RED) {
      return { ok: false, phase: this._phase, message: `confirmRed called but phase is "${this._phase}", expected "red".` };
    }

    if (!this._isTargetFailing(testResult) && testResult && testResult.failed === 0 && testResult.exitCode === 0) {
      return {
        ok: false,
        phase: PHASES.RED,
        message: `RED phase confirmation failed: all tests passed — "${this._targetTest}" is not failing yet. ` +
          'Write the test first, then call run_tests to confirm it fails before implementing.',
      };
    }

    this._redConfirmed = true;
    this._save();

    return {
      ok: true,
      phase: PHASES.RED,
      message: `RED confirmed: "${this._targetTest}" is failing. Now write the minimum implementation to make it pass.`,
    };
  }

  advanceToGreen(testResult) {
    if (this.disabled) return { ok: true, phase: 'idle', message: 'TDD gating disabled.' };