Context-efficient codebase navigation and documentation using structured frontmatter headers. Use this when exploring an unfamiliar codebase, answering "where is X / how does Y work" questions, or when asked to add/maintain file-level documentation. Index a tree's headers in one pass instead of reading every file, and generate or validate frontmatter with the bundled scripts. Reach for it whenever token budget matters while navigating code, even if the user does not say "frontmatter".

Use when creating Docusaurus plugins — write remark transformers for markdown AST, rehype transformers for HTML/HAST, lifecycle plugins that add routes/webpack config/global data via loadContent and contentLoaded, theme plugins and swizzled components, and content plugins for custom data sources. Triggers on tasks involving custom remark/rehype plugins, content plugins, theme plugins, or Docusaurus lifecycle hooks.

Use when writing or reviewing PostgreSQL/PL-pgSQL, designing table schemas, writing functions and procedures, building migrations, defining domains, or architecting a Postgres application database. Also use when writing RAISE EXCEPTION patterns, BEFORE/AFTER triggers for cross-table constraints, base/subtype hierarchies, composite key designs, row-level security policies, or idempotent DDL scripts. If you are touching Postgres for an application database, use this skill. PostgreSQL-specific — examples will not run on other engines.

Multi-platform content distribution across X, LinkedIn, Threads, and Bluesky. Adapts content per platform using content-engine patterns. Never posts identical content cross-platform. Use when the user wants to distribute content across social platforms.

Implements HTMX interactions, configures swap behaviors, debugs hx-* requests, and builds hypermedia-driven UI components. Use when tasks involve hx-* attributes, HTMX AJAX requests, swap strategies, server-sent events, WebSockets, or hypermedia-driven UIs.

Implements, evaluates, and deploys multi-armed bandit algorithms — including Thompson Sampling, UCB, epsilon-greedy, LinUCB, EXP3, and contextual bandits. Covers algorithm selection, experiment harnesses, offline evaluation (IPS, Doubly Robust), infrastructure patterns, and correctness verification. Use when the user asks about multi-armed bandits, exploration-exploitation tradeoffs, adaptive experiments, A/B testing alternatives, online optimization, bandit-based recommendation or personalization systems, or contextual bandits.

Create baseline context from .context/session/in/ folder with manifest-driven organization (run once per project). Use when bootstrapping project context, setting up .context/session/ctx/ snapshot. Triggers include "create context", "bootstrap context", "setup context", "init context".

Automatic quality control, linting, and static analysis procedures. Use after every code modification to ensure syntax correctness and project standards. Triggers onKeywords: lint, format, check, validate, types, static analysis.

Generate PromQL queries for calculating error rates, aggregating metrics across labels, creating histogram percentiles, writing recording rules, and building SLO burn-rate alerts following Prometheus best practices. Use when creating new PromQL queries, implementing monitoring and alerting rules, building observability dashboards, working with Prometheus metrics (counters, gauges, histograms, summaries), or applying RED (Rate, Errors, Duration) and USE (Utilization, Saturation, Errors) monitoring patterns.

Comprehensive toolkit for validating, optimizing, and understanding Prometheus Query Language (PromQL) queries. Use this skill when working with PromQL queries, prometheus queries, metrics queries, alerting rules, recording rules, or grafana dashboards to check syntax, detect anti-patterns, identify optimization opportunities, and interactively plan queries with users.

Apply Clean Architecture principles to define layer boundaries, identify dependency violations, and structure domain vs infrastructure code. Use when designing service boundaries, separating business logic from infrastructure, evaluating hexagonal/onion/ports-and-adapters architecture, structuring module layout, or resolving dependency inversion and circular dependency issues.

Select and apply structural design patterns (Strategy, Factory, Adapter, Observer, etc.) to reduce complexity in class design. Use when evaluating whether a pattern solves a concrete problem, refactoring conditional logic, dealing with too many if/else statements or code smells, resolving inheritance problems, or deciding how to structure classes.

Apply SOLID principles (SRP, OCP, LSP, ISP, DIP) for tactical class design, method extraction, and interface definition. Use when reviewing class design, refactoring code for maintainability, or designing interfaces and abstractions.

Creates bash scripts with argument parsing, error handling, logging, and input validation following current standards. Use when creating new bash or shell scripts, .sh files, CLI tools, scripting automation, text processing workflows (grep/awk/sed pipelines), or building production-ready command-line utilities. Trigger phrases include 'write a bash script', 'create a shell script', 'generate a .sh file', 'bash command', 'scripting', or 'automate with bash'.

Comprehensive toolkit for validating, linting, and optimizing bash and shell scripts. Use this skill when working with shell scripts (.sh, .bash), validating script syntax, detecting unquoted variables, checking POSIX compliance, identifying unsafe command substitutions, validating shebang lines, finding security vulnerabilities, or debugging shell script problems.

Generates Jenkinsfiles with stages, agents, parallel builds, post-build actions, and security scanning for Declarative and Scripted pipeline syntaxes. Use when creating a Jenkins pipeline script, Groovy pipeline, or build configuration; implementing CI/CD workflows, continuous integration, or build automation; adding Docker/Kubernetes deployments, matrix builds, parameterized pipelines, or DevSecOps security scanning to a Jenkins setup.

Comprehensive toolkit for validating, linting, testing, and automating Jenkinsfile pipelines (both Declarative and Scripted). Use this skill when working with Jenkins pipeline files, validating pipeline syntax, checking best practices, debugging pipeline issues, or working with custom plugins.

Ports the visual identity of any live website into a React plus Tailwind CSS project. Extracts colours, typography, spacing, component styles via browser automation, source inspection, curl, wget, DevTools. Writes structured documentation, applies findings as Tailwind v4 CSS tokens, then verifies by visually diffing the original site against the local build. Use when cloning a brand, replicating a design system, matching a reference site, migrating visual identity, copying a style guide, porting a theme from any live URL into a React codebase, matching a client reference design.

Runs multiple independent tasks concurrently by dispatching one focused agent per problem domain, completing batch workloads faster than sequential processing. Use when facing 2+ parallel tasks such as multiple failing test files, broken subsystems, or independent bugs that can be investigated and fixed simultaneously without shared state or sequential dependencies. Also useful when users ask to "run things in parallel", "work on multiple issues at the same time", handle "batch processing", or "multi-task" across independent problem domains.

Create structured journal entries with YAML frontmatter, template-based sections, and compliance validation. Use when user asks to 'create journal entry', 'new journal', 'document [topic]', 'journal about [topic]', or needs to create timestamped .md files in YYYY/MM/ directories. Supports four entry types: general journal entries, troubleshooting sessions, learning notes, and article summaries. Keywords: journal, documentation, troubleshooting, learning, article-summary, YAML frontmatter, template schemas, validation.

Configure and operate Mise for deterministic developer environments. Use when installing runtime/tool versions, defining reusable tasks, managing layered environment variables, migrating from asdf/nvm/pyenv, or debugging mise.toml behavior in CI and local shells. Keywords: mise, mise.toml, tool versions, tasks, env, asdf migration, setup automation, dev environment.

Generate label matchers, line filters, log aggregations, and metric queries in LogQL (Loki Query Language) following current standards and conventions. Use this skill when creating new LogQL queries, implementing log analysis dashboards, alerting rules, or troubleshooting with Loki.

Complete Commander.js CLI framework guidance covering command structure, options, arguments, subcommands, action handlers, version management, and TypeScript integration. Use when: building CLI tools, parsing command-line arguments, implementing subcommands, handling options/flags, creating interactive CLIs, or migrating from other CLI frameworks. Keywords: Commander.js, CLI, command-line, arguments, options, flags, subcommands, action handlers, version, help text, TypeScript, yargs, meow, program, parseAsync, opts, args, variadic, required options, default values, custom help, error handling

Build authoritative real-time multiplayer servers with Colyseus 0.17+. Use when implementing rooms, schema state sync, client message validation, matchmaking, authentication, reconnection handling, or server-side anti-cheat constraints. Keywords: colyseus, room lifecycle, schema, multiplayer, websocket, matchmaking, onJoin, onLeave, onDrop, allowReconnection.

Enforce AWS CDK security and compliance controls with cdk-nag. Use when adding rule packs, triaging findings, writing justified suppressions, integrating checks in CI/CD, or preventing insecure infrastructure patterns in CDK stacks.