fab

End-to-end feature fabrication: idea to testable implementation with four human touchpoints. Challenges the user's product framing before building, creates a spec, sets up an isolated worktree, implements with adversarial review and visual QA, delivers a running local instance with screenshots, and handles post-ship doc audit and retro. Use when the user wants to build a feature hands-off, or says "fab", "fabricate", or "build this end to end".

Senior UX advisor that critiques screens, flows, and design decisions by predicting first-fixation, the mental model the screen seeds, and where that model will mismatch the actual affordances. Applies Nielsen's heuristics, Krug's scannability, progressive disclosure, split-attention ("mental math") analysis, Jakob's-Law pattern conformance, and a cognitive-bias and dark-patterns audit. Use when the user asks to review a UI, critique a screen, give UX feedback, evaluate a flow, assess onboarding, audit a design, or check a screen for dark patterns / bias exploitation. Pairs with `fab` (https://github.com/headlinevc/fab) — fab invokes this skill in Stage 2.5 (UX pre-flight on the spec) and Stage 4.4 (advisory review of built UI).