Convert C/C++ project build.sh and test.sh scripts to support incremental builds. Use when fixing build scripts for re-execution after docker commit, converting to out-of-tree builds, or making scripts idempotent for repeated execution.

Use when managing memory in C programs with malloc/free, pointers, and avoiding common memory safety pitfalls.

Use when c systems programming including file I/O, processes, signals, and system calls for low-level system interaction.

Use when bootstrapping C3 documentation for any project - guides through Socratic discovery and delegates to layer skills for document creation

c3-alter

Use when verifying C3 documentation quality - checks methodology compliance (layer rules, structure, diagrams) and implementation conformance (docs vs code drift)

Use when documenting component implementation patterns, internal structure, or hand-off points - enforces NO CODE rule and diagram-first approach for leaf-level C3 documentation

Use when changes affect component organization, technology stack, or cross-container communication - triggered by new components, pattern changes, or needing to map external interfaces to internal components

Use when exploring Context level impact during scoping - system boundaries, actors, cross-container interactions, and high-level concerns

Use when designing, updating, or exploring system architecture with C3 methodology - iterative scoping through hypothesis, exploration, and discovery across Context/Container/Component layers

Use when upgrading .c3/ documentation to current skill version - reads VERSION, applies transforms from migrations/ directory in batches

c3-query

Generate comprehensive C4 architecture documentation for an existing repository/codebase using a bottom-up analysis approach.

Generate software architecture documentation using C4 model diagrams in Mermaid syntax.

Expert C4 Code-level documentation specialist. Analyzes code

Expert C4 Component-level documentation specialist. Synthesizes C4

Expert C4 Container-level documentation specialist. Synthesizes

Creates and manages C4 architecture diagrams using PlantUML. Use when the user wants to visualize software architecture, create context/container/component/sequence diagrams, document system design with the C4 model, or mentions architecture diagrams, system design, or PlantUML. Supports iterative diagram building through conversational workflow.

C4 model architecture visualization and documentation

C4 architectural modeling for documenting software architecture. Use when creating architecture diagrams, planning new systems, communicating with stakeholders, or conducting architecture reviews.

Review C99 code for compliance with HBF's strict coding standards including compiler warnings, Linux kernel style, and licensing constraints. Use when reviewing or writing C code in this project.

ALWAYS use this skill proactively for Consumer Affairs Django repositories (located in ../ca/ directory) when ANY of these occur - (1) After writing or modifying ANY Python code files in CA repos (2) After tests pass and before telling user work is complete (3) User mentions linting, formatting, ruff, code style, or code quality (4) After using the ca-django-tests skill successfully (5) Before preparing to commit code. This skill runs 'ca exec ruff format' and 'ca exec ruff check --fix' to ensure code quality. CRITICAL - Always run this automatically after code changes and before declaring work complete.

ALWAYS use this skill proactively for Consumer Affairs Django repositories (located in ../ca/ directory) when ANY of these occur - (1) User mentions coverage, codecov, test coverage, partial coverage, branch coverage, or uncovered lines/code (2) User asks to write tests, add tests, run tests, or fix test failures (3) User asks to implement features, fix bugs, or modify code in CA repos and tests are needed (4) User provides a file path containing 'test' or 'tests' in CA repos (5) After writing new code in CA repos that needs test coverage. This skill handles Django test execution using the 'ca magictest' command and ensures 100% code coverage for CI requirements.

cache-clear

When fetching library documentation, API references, or technical docs for project dependencies via WebFetch, automatically save a copy to the docs/ folder. Also triggers when user pastes documentation or discusses library APIs that should be cached for reference. Every non-stdlib import in the project should have corresponding reference docs cached.

Covers Dagger Engine caching internals including cache key derivation, invalidation, and the immutable DAG model. Use when debugging cache misses, unexpected invalidations, or implementing caching-related engine features.

cache-health

cache-list

cache-metrics

Caching patterns, TTL management, eviction policies for Redis implementations. Use when implementing cache-aside, write-through, write-back patterns, TTL management, or cache invalidation strategies.

Implement caching strategies for HTTP, service workers, and memoization

Design effective caching strategies for performance and consistency.

Dramatically speed up CI pipelines with intelligent caching.

Implement efficient caching strategies using Redis, Memcached, CDN, and cache invalidation patterns. Use when optimizing application performance, reducing database load, or improving response times.

Expert CAD Engineering Specialist with comprehensive knowledge of CAD

CAD and Mesh Generation Skill

Expert skill for parametric 3D CAD model development with design intent and configuration management

Convert CAD/BIM files to structured data. Extract element data from Revit, IFC, DWG, DGN files

caddy-https-troubleshoot

caddy-subdomain-add

caddy

Use when spacing, sequencing, and pacing multi-touch email programs.

Guidance for building and training with the Caffe deep learning framework on CIFAR-10 dataset. This skill applies when tasks involve compiling Caffe from source, training convolutional neural networks on image classification datasets, or working with legacy deep learning frameworks that have compatibility issues with modern systems.

Scans Cairo/StarkNet smart contracts for 6 critical vulnerabilities including felt252 arithmetic overflow, L1-L2 messaging issues, address conversion problems, and signature replay. Use when auditing StarkNet projects.

Interact with the Cal.com API v2 to manage scheduling, bookings, event types, availability, and calendars. Use this skill when building integrations that need to create or manage bookings, check availability, configure event types, or sync calendars with Cal.com's scheduling infrastructure.

Use to enforce cadence rules, timezone coverage, and operational controls

DEBUG calendar inbox showing 0 tasks when inbox has tasks. Fix Vue 3 + Pinia calendar filtering issues where sidebar filters hide calendar inbox tasks.

COMPREHENSIVE calendar system skill combining TypeScript interface architecture,

Balance the 4 types of professional time (Management, Creation, Consumption, Ideation). Use when discussing productivity, calendar management, time allocation, or work-life balance.

This skill should be used when fixing Vue.js calendar task scheduling issues, specifically when tasks with due dates incorrectly appear in calendar grid instead of staying in calendar inbox. The skill provides comprehensive research-backed solutions for separating task management from calendar scheduling with mandatory Playwright testing.