JavaScript / Motion
Celebration.js
Explore visual effects, sequence composition, and restrained feedback.
Zyel Lab / Code, questions, tradeoffs
Lab discussions
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Reader comments and 100 clearly labeled worked examples are kept separate. The example names and timestamps are fictional.
TypeScript / Runtime boundaries
TypeScript Boundary Lab
Trigger malformed responses and stale updates, then inspect the safeguards.
PHP / Transactions
PHP Transaction Lab
Follow stale inventory and repeated requests through a browser PHP runtime.
Go / Cancellation
Go Worker Lab
Compare blocked workers with a bounded, cancellation-aware design.
AI / Structured output
AI Integration Workbench
Validate a fixture response, inspect citations, and keep review decisions visible.
Vue / Order workflow
Vue Dealer Portal
Follow synthetic quotes, approvals, and orders through a dealer interface.
GIS / Linked records
GIS Territory Explorer
Connect a synthetic service map with filters and an accessible records view.
CSS / Preferences
UX Workspace Studio
Adjust allowed design tokens and transfer validated browser preferences.
Workflow / Guarded handoffs
Codex Bridge Workshop
Inspect a workshop about local handoffs and repeat-safe workflow concepts.
Commerce / Prototype
GardenerDirect prototype
Inspect a synthetic commerce reconstruction and its stated boundaries.
Security / Offline companion
Secure Merchant Checkout
Read the static companion to an offline checkout security exercise.
Teaching / Screen recording
Tutorial Recording Playbook
Plan a readable result-first recording with captions and a verified learning package.
Coordination / Reconciliation
Codex to Scrum
Explore a workstation-to-AWS teaching model with guarded, repeat-safe reconciliation.
React / Application state
React Reconciliation Lab
Change a reservation and check whether editor, summary, and server state agree.
PostgreSQL / Reporting
SQL Reporting Lab
Find inflated revenue, event-versus-person counting, and reporting-day errors.
Identity / Data isolation
Tenant Boundary Lab
Inspect company boundaries, viewer permissions, and missing data filters.
Go / Service recovery
Go Service Resilience Lab
Explore how timeouts, retries, and capacity change a slowing dependency.
Tracing / Diagnosis
Trace the Wait Lab
Follow a slow request and inspect which part of its path owns the delay.
Delivery / Compatibility
Safe Rollout Lab
Compare old and new application versions through a database compatibility window.
Python / Evidence evaluation
Python Evidence Evaluation Lab
Check whether cited documents support an answer and whether a workflow respects its limits.