Skills Catalog

Test-driven development for Spring Boot using JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo. Use when adding features, fixing bugs, or refactoring.

Verification loop for Spring Boot projects: build, static analysis, tests with coverage, security scans, and diff review before release or PR.

Suggests manual context compaction at logical intervals to preserve context through task phases rather than arbitrary auto-compaction.

Thread-safe data persistence in Swift using actors — in-memory cache with file-backed storage, eliminating data races by design.

Swift 6.2 Approachable Concurrency — single-threaded by default, @concurrent for explicit background offloading, isolated conformances for main actor types.

Protocol-based dependency injection for testable Swift code — mock file system, network, and external APIs using focused protocols and Swift Testing.

SwiftUI architecture patterns, state management with @Observable, view composition, navigation, performance optimization, and modern iOS/macOS UI best practices… more

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and… more

N coordinated agents on shared task list using Claude Code native teams

Interactive agent picker for composing and dispatching parallel teams

Evidence-first repo execution workflow for ECC. Use when the user wants a command run, a repo checked, a CI failure debugged, or a narrow fix pushed with exact… more

Toolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fo… more

Offers the user an informed choice about how much response depth to consume before answering. Use this skill when the user explicitly wants to control response… more

Evidence-driven tracing lane that orchestrates competing tracer hypotheses in Claude built-in team mode

Transcribe audio files to text with optional diarization and known-speaker hints. Use when a user asks to transcribe speech from audio/video, extract text from… more

Record polished UI demo videos using Playwright. Use when the user asks to create a demo, walkthrough, screen recording, or tutorial video of a web application.… more

QA cycling workflow - test, verify, fix, repeat until goal met

Parallel execution engine for high-throughput task completion

Operate notifications as one ECC-native workflow across GitHub, Linear, desktop alerts, hooks, and connected communication surfaces. Use when the real problem i… more

React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reus… more