C4 Level 2 + Level 3 system decomposition. Per container: technology, purpose, responsibilities, APIs exposed + consumed, data stores, deployment, scaling, tenant model, ownership. Per container relationship: protocol + purpose + synchronicity + failure mode + rate. L3 scopes to one container with typed components (controller / service / repository / adapter). Avoids L4 code details. Mermaid diagrams with optional PNG export.
Plugin system-decomposition from marketplace svens-claude-plugins in SSiertsema/claude-code-plugins. Commands read from the repo's manifest — 1 month ago.
system-decompositionC4 Level 2 (containers) and Level 3 (components) system decomposition. Per container: purpose, technology, responsibilities, APIs, data stores. Per component: role, collaborators. Relationships with protocol + purpose.
Frame A/B tests with falsifiable hypothesis, variants, pre-committed primary/secondary/guardrail metrics, MDE, sample size (formula shown), duration spanning a weekly cycle, peek policy, pre-committed decision rule, validity risks with mitigations, and ethics review. Mermaid diagrams with optional PNG export.
1 skill
Write, audit, or split acceptance criteria for a user story. Given/When/Then (Gherkin) default + rule-based + mixed formats. Systematic coverage (happy path + negative + edge + boundary + a11y + optional performance/security/data/integration). INVEST at story + AC level. SPIDR split (Spike / Path / Interface / Data / Rule) when story too big. Scenario outlines for parametric data. Mermaid coverage pie + split diagrams with optional PNG export.
1 skill
Define accessibility requirements against WCAG 2.2 AA (default), AAA, EN 301 549, EAA, Section 508, ADA. Produces per-feature Given/When/Then criteria, assistive-technology support matrix per platform, combined automated + manual + AT + user-testing plan, and remediation priority for existing products. Not a conformance audit. Mermaid diagrams with optional PNG export.
1 skill
Write, review, supersede, or index Architecture Decision Records. Michael Nygard format (default) + Y-statement alternative. Immutable once accepted — supersession chain preserves old ADRs. Status lifecycle (Proposed / Accepted / Deprecated / Superseded). ADR log with chronological index + supersession chains visible. Review mode flags stale ADRs + missing consequences. Integrates with traceability-matrix. Mermaid timeline with optional PNG export.
1 skill
Bottom-up thematic clustering of unstructured items (research notes, interview quotes, brainstorm ideas, feedback) using the KJ method. Discovers emergent themes with evidence traceability, identifies patterns/tensions/gaps, flags outliers, and prioritizes clusters by signal strength. Mermaid diagrams with optional PNG export.
1 skill
Algorithm design pre-implementation: problem + inputs/outputs + constraints, ≥2 candidate approaches compared on time+space+stability+in-place+parallelism, chosen approach with loop/data/global invariants, language-neutral pseudocode, correctness argument (invariant / induction / preservation / reduction), edge-case catalog, worst/avg/space complexity, numerical + concurrency concerns, property-based + boundary + performance + fuzz tests, parallelization + out-of-core + streaming variants.
1 skill
Comprehensive feature development workflow with specialized agents for codebase exploration, architecture design, and quality review
1 command · 3 agents
Professional UI/UX design intelligence for AI coding assistants. Includes searchable databases of styles, colors, typography, charts, and UX guidelines for React, Next.js, Astro, Vue, Nuxt.js, Nuxt UI, Svelte, SwiftUI, React Native, Flutter, Tailwind, shadcn/ui, Jetpack Compose, Angular, Laravel, JavaFX, and Three.js.
7 skills
Official Next.js skills: adopt and optimize Cache Components, adopt Partial Prefetching, and verify runtime behavior against a running dev server.
6 skills
AI-powered codebase understanding — analyze, visualize, and explain any project
9 skills · 10 agents · hooks
Build, preview, and test UI components with Storybook.
7 skills
ADR lifecycle management — create, index, supersede, and link Architecture Decision Records to code
5 skills · 1 command · 1 agent
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