Desenvolvimento

Audit e-commerce and retail product return systems for return rate reduction strategies, reverse logistics efficiency, refurbishment routing, fraud detection in returns, and return reason analytics. Use when reviewing order management systems, RMA workflows, warehouse return processing, disposition engines, or retail loss prevention tools.

Generate Excalidraw architecture diagrams (.excalidraw JSON files) from your codebase. Produces hand-drawn-style C4 context and container diagrams, sequence diagrams for key flows, ER diagrams from database schemas, and module dependency graphs. Use when you need whiteboard-style sketches that read as a thinking artifact rather than a polished spec — ideal for design docs, onboarding, and slide de

Test strategy review and design from the perspective of a Principal SDE/T. `/tester` audits the current test strategy and appends a dated finding to TESTING.md. `/tester design` writes (or revises) a durable test-architecture contract in TESTING.md and seeds rollout items in BACKLOG.md. Manual invocation only. Do not invoke automatically.

Generate skill catalog — auto-discovers skills, builds README tables, JSON, or HTML output. Triggers: generate skill catalog, update skills documentation, list all skills

Maps the entire API surface of a codebase -- route definitions, middleware chains, auth requirements, request/response types, deprecated endpoints, orphaned endpoints, and cross-endpoint inconsistencies. USE THIS SKILL WHEN: - You need a complete inventory of all API endpoints in a project - Someone asks "what endpoints do we have?" or "what does our API look like?" - You are onboarding to a new b

Quantify cyber risk using FAIR methodology with Monte Carlo simulation, assess control effectiveness against NIST CSF/CIS/ISO 27001 frameworks, evaluate risk appetite alignment, and analyze cyber insurance coverage adequacy. Covers threat landscape mapping, asset valuation, loss event frequency and magnitude estimation, annualized loss expectancy calculation, control gap analysis with ROI ranking,

Configure linting, formatting, and editor integration for any stack. Sets up ESLint 9 or Biome for JS/TS, Ruff for Python, golangci-lint for Go, Clippy for Rust, RuboCop for Ruby, or dart analyze for Flutter. Adds Prettier or equivalent formatter, .editorconfig, and VS Code format-on-save. Use when you need to add a linter, fix formatting inconsistencies, migrate from legacy lint tools, or set up

Turn vague implementation requests into testable requirements before coding.

Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always

Address actionable GitHub pull request review feedback. Use when the user wants to inspect unresolved review threads, requested changes, or inline review comments on a PR, then implement selected fixes.

Audit corporate tax compliance systems across jurisdictions. Analyzes tax engine configuration (Avalara, Vertex, ONESOURCE), nexus determination and Wayfair economic nexus tracking, sales/use tax calculation accuracy, federal and state income tax compliance (book-to-tax adjustments, NOL, R&D credits, apportionment), ASC 740 tax provision automation (ETR, deferred tax, uncertain tax positions), tra

Automated QA agent that starts the app, walks through every screen and API endpoint, verifies functionality, evaluates modern design and usability, runs domain analysis, and fixes issues found.