WebhookLab — six written lessons with local exercises

WebhookLab 0.1.3: six short written lessons, explained quizzes, workbook and offline HookReplay/ContractLens exercises. Includes corrected array-uncertainty behavior. Modern browser; no paid runtime. Not video training or accreditation; no production authentication or recovery endpoint. Free provider documentation is a strong alternative. Original work by Shruti. Rights/delivery guidance: LICENSE.txt.