Skills de Claude Code · página 47

Read and write compressed sequence files (gzip, bzip2, BGZF) using Biopython. Use when working with .gz or .bz2 sequence files. Use BGZF for indexable compressed files.

Generate consensus FASTA sequences by applying VCF variants to a reference using bcftools consensus. Use when creating sample-specific reference sequences or reconstructing haplotypes.

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Keep coding agents focused on requested and necessary work. Use when a request sets a read-only, answer-only, file, action, or stopping boundary; when evidence shows scope creep, speculative hardening, unnecessary hashing or dependencies, repeated audit loops, or valueless delegation; or when the user invokes Stop That Shit. Do not invoke for an ordinary focused fix without a boundary or scope-creep signal.

Reduce defensive disclaimers, stacked hedging, and self-protective narration in proposals and decision-facing writing. Use when the user asks to rewrite or audit a proposal, plan, research contribution, executive summary, or similar text for directness. Do not use for ordinary code work or unrelated prose.

Design an A/B experiment — hypothesis, variants, primary metric, and sample size. Use when a change can be measured quantitatively at scale. For observing behaviour qualitatively, use `test-scenario`.

Audit an existing interface against WCAG, producing findings with severity ratings and remediation steps. Use when you have a design or build to assess now. Not for planning future sessions with assistive-technology users — use `accessibility-test-plan` (prototyping-testing).

Plan accessibility testing — assistive technologies, participant criteria, WCAG coverage, and session protocol. Use when scheduling testing with real AT users. Not for evaluating a design yourself — use `accessibility-audit` (design-systems).

Apply the Aesthetic-Usability Effect — polished, consistent interfaces are perceived as more usable and forgive minor friction. Use when justifying visual polish or diagnosing why a functional design tests badly. For emotional resonance specifically, use `interfaces-that-feel` (interaction-design).

Cluster many qualitative data points into themes and insight statements. Use when synthesising across multiple sessions or sources. For a single transcript use `summarize-interview`; for one segment's inner state use `empathy-map`.

Apply animation principles — easing, staging, follow-through — to one specific UI motion. Use when tuning how an animation feels. For product-wide duration and easing tokens use `motion-system` (design-systems); for a full interaction spec use `micro-interaction-spec`.

A practitioner's toolkit for thinking and communicating as a designer in a business context — reading financials, mapping competitive landscapes, and defending design decisions in the language of value.

Analyse open or closed card sort results into a proposed grouping and label set. Use after running a sort study. For turning that evidence into a full structure, use `information-architecture` (ux-strategy).

Craft a portfolio case study with narrative arc, process evidence, and outcomes. Use when telling a project's story to an external audience. For an internal stakeholder deck, use `presentation-deck`.

Design first-click and click tests for findability and navigation. Use when testing whether people can locate something. For full task-based observation, use `test-scenario`.

Build a product colour system — tonal scales, semantic roles, and contrast compliance. Use when defining or rebuilding colour from scratch. For dark-mode adaptation use `dark-mode-design`; for chart palettes use `data-visualization`; for multi-brand token architecture use `theming-system` (design-systems).

Conduct a structured competitive analysis comparing UX patterns, features, strengths, and gaps across rival products.

Specify one component — props, states, variants, accessibility, and usage rules. Use when defining a library component. For the reusable doc scaffold use `documentation-template`; for a problem-solution pattern use `pattern-library`.

Define what content a product needs, how it should be structured, and who owns it.

Design voice and conversational interfaces — dialog flows, error recovery, and persona. Use when the interface speaks and listens rather than being tapped. For graphical input collection, use `form-design`.

Adapt an existing palette to dark mode — surface elevation, contrast rebalancing, and desaturation rules. Use when you already have a light palette to translate. For building the base palette first, use `color-system`.

Select chart types and design data encodings — marks, axes, labels, and accessible chart styling. Use when presenting data graphically. Owns chart selection and encoding only; the categorical colour ramp itself belongs to `color-system`.

Facilitate a structured team critique — framing, feedback rules, and actionable outcomes. Use when running a session with people in the room. For a solo expert review, use `heuristic-evaluation` (prototyping-testing).

Inventory and prioritise accumulated design inconsistencies across a product. Use when drift has built up over time. For token coverage specifically use `design-token-audit` (designer-toolkit); for WCAG gaps use `accessibility-audit` (design-systems).

Communicate design's contribution to business and user outcomes in stakeholder language. Use when reporting results upward. For choosing the metrics in the first place, use `metrics-definition` (ux-strategy).

Advocate for design quality, scope, and timeline with partners and leadership using evidence and shared goals. Use in the conversation itself. For the commercial vocabulary behind it, use `business-design` (ux-strategy).

Build a QA checklist for verifying that a build matches the design. Use at implementation review. For the spec engineers build from, use `handoff-spec`.

Write rationale connecting decisions to user needs, business goals, and principles. Use when a decision needs defending in writing. For a live conversation, use `design-negotiation`.

Establish review gates — criteria, checkpoints, and approval flow. Use when work ships without consistent review. For running one individual session, use `design-critique`.

Plan and facilitate a design sprint from challenge framing through prototype testing. Use when compressing discovery into days. For ongoing team cadence, use `team-workflow`.

Create adoption strategy and enablement materials to drive design system usage. Use when the system exists but teams ignore it. For contribution and versioning rules, use `design-system-governance` (design-systems).

Define how the system evolves — contribution model, versioning, deprecation, and change management. Use when multiple teams contribute. For driving uptake use `design-system-adoption` (designer-toolkit); for design file history use `version-control-strategy` (design-ops).

Define and organise tokens for colour, spacing, type, and elevation with naming and usage rules. Use when establishing the token layer. For auditing existing usage use `design-token-audit` (designer-toolkit); for multi-brand mapping use `theming-system`.

Audit token usage across a product for coverage, drift, and hard-coded values. Use when tokens exist and you suspect they are being bypassed. For defining tokens in the first place, use `design-token` (design-systems).

Design a diary study — prompts, cadence, duration, participant criteria, and analysis frame. Use when behaviour unfolds over days or weeks. For a single-session study, use `usability-test-plan`.

Generate a reusable documentation scaffold for components, patterns, or guidelines. Use when standardising how the system is documented. For the content of one component's spec, use `component-spec`.

Apply the Doherty Threshold — keep system response under 400ms to preserve user flow. Use when diagnosing perceived slowness or setting a performance budget. For what to show during unavoidable waits, use `loading-states`.

Build a Says, Thinks, Does, Feels map for one user or segment. Use when sharing user understanding quickly. For a composite archetype with goals and behaviours use `user-persona`; for cross-session themes use `affinity-diagram`.

Design error prevention, detection, and recovery across a product — message content, placement, and escape routes. Use when errors span multiple flows. For validation inside a single form, use `form-design`.

Design confirmations, status updates, and notifications that tell users an action registered. Use when the system must acknowledge success or change. For waiting states use `loading-states`; for failures use `error-handling-ux`.

Apply Fitts's Law — target acquisition time depends on size and distance. Use when sizing and positioning controls, especially for touch. For how many controls to show at once, use `hicks-law`.

Design a form end to end — field order, grouping, validation, and completion. Use when the artifact is a form. For product-wide error strategy use `error-handling-ux`; for first-run signup use `onboarding-design`.

Design gesture interactions for touch and pointer — swipe, drag, long-press, and their discoverability. Use when input is gestural. For OS-standard gestures on iOS and Android, use `platform-conventions` (ui-design).

Write the implementation handoff — measurements, behaviours, assets, states, and edge cases. Use when engineering picks up the work. For verifying the result afterwards use `design-qa-checklist`; for reusable library components use `component-spec` (design-systems).

Run an expert review against Nielsen's heuristics and domain criteria, with severity ratings. Use when you need findings without recruiting participants. For a facilitated team feedback session, use `design-critique` (design-ops).

Apply Hick's Law — decision time grows with the number of simultaneous choices. Use when a screen offers too many options at once. For how many items survive in memory afterwards, use `millers-law`.

Specify an icon system — grid, sizing, stroke weight, naming, categories, and implementation. Use when standardising iconography. For broader illustration, use `illustration-style` (ui-design).

Define an illustration style guide — visual language, colour usage, and application rules. Use when commissioning or standardising illustration. For icons, use `icon-system` (design-systems).

Apply an emotional resonance lens to a UI that is technically correct but flat, prescribing changes at the copy, motion, and interaction layer. Use when a design tests fine but lands cold. For the polish-perception argument, use `aesthetic-usability` (ui-design).

Write a structured interview guide — warm-up, core exploration, and wrap-up. Use before running interviews. For analysing what comes back, use `summarize-interview`.

Apply Jakob's Law — users expect your product to work like the others they already use. Use when deciding whether to innovate on a familiar pattern. For OS-mandated conventions specifically, use `platform-conventions` (ui-design).

Map functional, emotional, and social jobs with outcome expectations. Use when reframing decisions around motivation rather than features. For who the user is, use `user-persona`.

Map one persona's end-to-end experience with stages, touchpoints, emotions, and pain points. Use when improving an existing experience. For the multi-channel ecosystem use `experience-map` (ux-strategy); for screen-level paths use `user-flow-diagram` (prototyping-testing).

Apply the Law of Closure — the eye completes implied shapes from partial forms. Use when reducing visual weight by dropping borders or letting negative space suggest structure. For explicit containers, use `law-of-common-region`.

Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing. Use when grouping must survive a tight layout. For grouping by spacing alone, use `law-of-proximity`.

Apply the Law of Continuity — the eye follows alignment and unbroken paths. Use when sequencing steps, aligning content, or designing carousels and timelines. For grouping rather than sequencing, use `law-of-proximity`.

Apply the Law of Figure-Ground — establish which layer is foreground and actionable versus background. Use when designing modals, overlays, and depth. For emphasising one element among peers, use `von-restorff-effect`.

Apply the Law of Proximity — spatial closeness groups elements more strongly than any other cue. Use when spacing alone must carry grouping. For grouping via containers use `law-of-common-region`; via shared appearance use `law-of-similarity`.

Apply the Law of Similarity — shared colour, shape, or size signals that elements belong to one category. Use when signalling relationships across distance. For grouping by position, use `law-of-proximity`.

Define responsive layout grid systems with columns, gutters, margins, and breakpoint behavior.

Design waiting experiences — spinners, skeletons, optimistic updates, and progressive reveal. Use when content takes time to arrive. For the latency budget itself use `doherty-threshold`; for success confirmation use `feedback-patterns`.

Design for multiple languages, writing directions, and cultural contexts — text expansion, RTL mirroring, and locale formats. Use when shipping beyond one locale. For the words themselves, use `ux-writing` (designer-toolkit).

Specify one micro-interaction completely — trigger, rules, feedback, loops, and modes. Use when handing a single interaction to engineering. For motion craft alone use `animation-principles`; for multi-state components use `state-machine`.

Apply Miller's Law — chunk information into groups of about four to fit working memory. Use when grouping fields, menu items, or steps. For reducing the number of choices offered, use `hicks-law`.

Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide. Use when standardising motion across a system. For crafting one specific animation, use `animation-principles` (interaction-design).

Establish naming rules for components, tokens, and layers with patterns and worked examples. Use when names are inconsistent or being set. For what the tokens actually contain, use `design-token`.

Select and design a navigation pattern — tabs, drawer, hierarchy, or hub — matched to product structure and user tasks. Use when choosing how users move between sections. For the underlying content structure, use `information-architecture` (ux-strategy).

Design the first-run experience — activation path, progressive disclosure, and time to first value. Use for a user's very first session. For the mechanics of the signup form itself, use `form-design`.

Structure a pattern entry — problem context, solution, usage examples, and related patterns. Use when documenting a recurring solution rather than a component. For a single component's API, use `component-spec`.

Apply the Peak-End Rule — a flow is remembered by its most intense moment and its last. Use when designing completion, celebration, or cancellation moments. For sustaining engagement mid-flow, use `zeigarnik-effect`.

Structure a design presentation for a specific audience and decision. Use when presenting internally. For a portfolio narrative use `case-study`; for the written argument use `design-rationale`.

Choose prototype fidelity and method to match the design question and the decision at stake. Use before building a prototype. For what to test once it exists, use `test-scenario`.

Set optimal line lengths for readability across typography scales and responsive layouts.

Build a repository that makes findings findable, reusable, and cumulative across teams. Use when the same research keeps getting redone. For synthesising one study, use `affinity-diagram`.

Design adaptive layouts and interactions that work across all screen sizes and input methods.

Design search — query input, zero results, refinement, and result presentation. Use when users retrieve rather than browse. For browse structure, use `navigation-patterns`.

Apply the Serial Position Effect — first and last items in a sequence are recalled best. Use when ordering menus, lists, and steps. For emphasising one item regardless of its position, use `von-restorff-effect` (ui-design).

Create a consistent spacing system based on a base unit with contextual application rules.

Model component behaviour as explicit states, events, and transitions. Use when a component has many interacting states that must be exhaustive. For the feel and feedback of a single interaction, use `micro-interaction-spec`.

Turn one interview transcript into themes, supporting quotes, and action items. Use immediately after a session. For synthesising many sessions at once, use `affinity-diagram`.

Design unbiased survey instruments — question wording, scales, and sampling — to measure attitudes at scale. Use when you need quantitative breadth. For behavioural experiments, use `a-b-test-design` (prototyping-testing).

Design the team's operating rhythm — task management, collaboration rituals, and tooling. Use when the day-to-day cadence needs structure. For a time-boxed sprint, use `design-sprint-plan`.

Apply Tesler's Law — every process has irreducible complexity that someone must absorb. Use when deciding whether the product or the user carries it. For reducing apparent choice, use `hicks-law`.

Write realistic usability task scenarios with success criteria and facilitation notes. Use when you have a study and need the tasks. For the surrounding study design, use `usability-test-plan` (design-research).

Design theming architecture — brand variants, dark mode, and high-contrast — mapped through token layers. Use when one system must serve multiple themes. For a single palette use `color-system` (ui-design); for dark mode craft use `dark-mode-design` (ui-design).

Create a modular typography scale with size, weight, and line-height relationships.

Design a usability study — research questions, methodology, participant criteria, metrics, and facilitation guide. Use when planning the study as a whole. For writing the task scenarios inside it, use `test-scenario` (prototyping-testing).

Diagram screen-level paths, decision points, and branch logic. Use when specifying how a feature is traversed. For the emotional end-to-end arc, use `journey-map` (design-research).

Build research-grounded personas with goals, frustrations, and behavioural patterns. Use when decisions need a consistent user reference. For one session's emotional snapshot use `empathy-map`; for motivation framing use `jobs-to-be-done`.

Write interface copy — microcopy, error messages, empty states, and CTAs. Use when the words are the deliverable. For content structure and ownership, use `content-strategy` (ux-strategy).

Define version control for design files, components, and libraries — branching, naming, and release. Use when file history is chaotic. For design system contribution rules, use `design-system-governance` (design-systems).