Write formal UML-style use cases (Cockburn conventions). Brief / casual / fully-dressed formats. Per UC: primary actor + supporting actors, stakeholders & interests, preconditions, postconditions, trigger, numbered main success scenario, alternate flows indexed to steps, exception flows, special requirements, frequency, priority. Cockburn level (summary / user-goal / subfunction). UML use-case diagram. Mermaid with optional PNG export.
Plugin use-case-writing from marketplace svens-claude-plugins in SSiertsema/claude-code-plugins. Commands read from the repo's manifest — 1 month ago.
use-case-writingWrite formal UML-style use cases. Per use case: name, actor(s), preconditions, postconditions, trigger, main success scenario (numbered steps), alternate flows, exception flows, special requirements, frequency. Supports brief, casual, and fully-dressed formats (Cockburn).
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 Status lifecycle (Proposed / Accepted / Deprecated / Superseded).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
Neural trading strategies — self-learning LSTM/Transformer/N-BEATS models with Rust/NAPI backtesting
9 skills · 1 command · 4 agents
Editorial diagrams in your brand, as self-contained HTML and SVG. Architecture, flowcharts, sequence, state machines, ER and database schemas, timelines, swimlanes, org charts, Gantt, Wardley maps, user journeys, service blueprints, UML class, lifecycle phase maps, and charts from bar, line and scatter to Sankey, treemap and heatmap, plus many more. Redraws draw.io, Mermaid, Excalidraw and PlantUML files. Exports SVG and PNG.
1 skill · 7 commands
Database migration automation, observability, and cross-database migration strategies
2 commands · 2 agents
Free AI-powered SEO toolkit — audit websites, plan content strategy, optimize pages, generate schema markup, cluster keywords, and track AI visibility. Works with any website or codebase.
11 skills · 6 commands
33 C-level advisory skills (install the separate companion c-level-agents plugin for the persona layer): virtual board of directors (CEO, CTO, COO, CPO, CMO, CFO, CRO, CISO, CHRO) plus General Counsel, CDO, CAIO, CCO, and VP of Engineering (DORA delivery throughput analyzer, engineering hiring funnel calculator with conversion + pipeline gap, eng team structure designer with squad/tribe + manager-trigger), executive mentor, founder coach, orchestration (Chief of Staff, board meetings, decision logger), strategic capabilities (board deck builder, scenario war room, competitive intel, M&A playbook), culture frameworks. The 13 cs-* persona agents + 21 /c-level-agents:* slash commands (founder-mode router, office-hours intake, multi-role boardroom, strategic sprint pipeline, cross-model consensus, cooldown freeze) ship in the companion c-level-agents plugin.
34 skills · hooks
Product strategy skills for PMs: vision, strategy canvas, value propositions, lean canvas, business model canvas, SWOT, PESTLE, Ansoff Matrix, Porter's Five Forces, and monetization.
12 skills · 5 commands
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