zeroday27

Transform, validate, and summarize CSV, JSON, JSONL, and YAML tables without loading entire files into chat.

Test-driven development for a single behavior — write a failing test first, then the minimum implementation, then refactor.

Reduce output and context tokens without losing technical accuracy.

Deep UX design review for web applications — reads all code to map user flows, count friction, challenge whether each screen should exist…

Verify a running web app in a real browser — click, type, submit, screenshot, and check console errors.

Audit UI files for accessibility, interaction, performance, and UX implementation quality.

Structured review of a diff, PR, or recent changes for correctness, regressions, security, and maintainability.

Build distinctive, production-quality UI that does not look AI-generated.

Create, edit, and optimize Agent Skills (SKILL.md) for token efficiency, reliable triggering, and real-world reuse.

Debug production and development failures with a hypothesis loop instead of shotgun edits.

Write and revise interface copy — labels, buttons, empty states, errors, onboarding, notifications, and confirmation text.