Claude Skills by coroboros

Create, configure, and orchestrate Claude Code subagents — specialized Claude instances with focused roles and limited tool access. Covers YAML frontmatter (name, description, tools, model, permissions, hooks, MCP servers), system prompt design, tool restriction patterns, background execution, and multi-agent orchestration. Use whenever the user mentions subagents, delegation, specialists, agent configs, `.claude/agents/`, the `/agents` command, or wants to parallelize work — even when they j...

Systematic implementation using APEX methodology (Analyze-Plan-Execute-eXamine) with parallel subagents and self-validation. Use when implementing features, fixing bugs, or making code changes that benefit from structured workflow.

Use this skill whenever a user has an audio file (.wav/.mp3/.flac/etc.) that needs to loop as background on a website or web page — hero ambience, landing-page atmosphere, portfolio mood audio, ambient wind/rain/ocean/forest/breeze/pad beds, or any "play quietly behind the page while users read/scroll/interact" use case. Trigger on intents like making a clip loop without audible gaps or boundary artifacts on a site, fixing a click/tick/pop/bump at the loop boundary, fixing stereo bias or L/R ...

Art director for award-level frontend design (Awwwards SOTD 7.5+, FWA, CSSDA). Takes the lead when the brief names the ceiling — award-winning, premium, signature, a new visual identity, an uplift or ground-up redesign — forces a committed, anti-default visual universe, writes it as a DESIGN.md and a design-plan.md whose ladder of build chunks any executor runs one at a time; handed one chunk, builds that chunk alone under its gates. Adapts to an existing DESIGN.md and alerts when it is thin....

Govern the BRAND-VOICE.md — extract a brand's writing voice from URL, Notion page, MD file/directory, or interview into a structured executable doc; update incrementally; diff versions; validate the canonical format; show testable rules. Supports multi-voice via `voice.extends` (founder on corporate, persona on institutional, multi-host) with `_replace`/`_remove` overrides. Consumed by writing skills via `-f` (e.g. `humanize-en`). Use when defining, extracting, refreshing, validating, or insp...

Create and optimize CLAUDE.md memory files or .claude/rules/ modular rules for Claude Code projects. Covers file hierarchy, content structure, path-scoped rules, best practices, and anti-patterns. Use when working with CLAUDE.md files, .claude/rules directories, setting up new projects, or improving Claude Code's context awareness — even when the user just says "memory file" or mentions Claude instructions without naming the filename.

Eight-axis judgment code review for the current diff — Correctness, Simplification, Tests, Documentation, Style, Intent, Design/API, Performance (+ Coherence on metadata changes). Five-phase pipeline scope → atomic deterministic tool battery (project-declared or installed PATH tools; no runtime package resolution) → 8 parallel LLM axis reviewers → fresh-context validators on sub-80 findings (verbatim rubric, ≥80 threshold) → synthesis with no-silent-drop + Conventional Comments JSONL. Missing...

Govern an existing DESIGN.md during UI work. Enforce token-backed colors, typography, spacing, and radius when the file exists; steps aside when it does not. Use for token-affecting edits and seven subcommands, four backed by the canonical CLI — audit, diff, export, spec, migrate, init, and extension drift checks. CLI-backed operations stop with exact remediation when the canonical validator is unavailable or invalid.

Download video or audio from ~1800 sites (YouTube, Vimeo, SoundCloud, Twitch, X…) with the `yt-dlp` CLI — full videos, mp3 audio, playlists, time-range clips, subtitles, capped resolutions. Use whenever the user wants to download, save, grab, or rip a video/audio/playlist from a URL, extract a song as mp3, clip a segment, or fetch subtitles — even when they just say "download this", "get the audio", or "save this playlist".

Pre-implementation thinking — research the problem space, weigh approaches with devil's-advocate rigor, decide what's reversible and conventional while surfacing the load-bearing forks for the user, and emit one apex-ready plan. Use whenever a non-trivial task needs thinking, comparison, or decomposition before code — even when the user doesn't say "forge" (e.g. "should we", "what's the best way", "compare", "evaluate", "pros and cons", "think through", "plan this", "break this down", "spec o...

Senior frontend developer for everyday UI work — pages, dashboards, forms, components, quick landings. The default lane for "design this", "add a page", "build a dashboard", "make it look better" — commits a five-line direction before any code when no brief exists, fixes composition by surface archetype, holds hard floors on type, spacing, color, and motion, and refuses the model's fingerprint page. Reads a DESIGN.md or an award-design ladder chunk as the brief when one exists. Award-level as...

Strip AI writing tells from English prose — em-dash overuse, rule of three, negative parallelisms, AI vocabulary (delve, tapestry, crucial, pivotal, underscore, showcase), vague attributions, promotional tone, conjunctive padding (moreover, furthermore, indeed), hedging, signposting, chatbot artifacts. Preserves meaning, structure, code blocks, links, anchors, and frontmatter — rewrites only the flagged phrasing. Operates on inline text or a prose file path; optionally loads a `BRAND-VOICE.md...

Convert any document to Markdown with Microsoft's `markitdown` CLI — PDF, Word, Excel, PowerPoint, HTML, CSV, JSON, XML, ZIP, EPub, images (OCR/EXIF), audio (transcription), and YouTube URLs. Use whenever the user wants to extract text from a binary document, transcribe audio, OCR an image, scrape a YouTube transcript, or pre-process a file for an LLM context window — even when they just say "convert this pdf", "what's in this docx", "transcribe this mp3", or "get the text out of this".

Notion access from Claude Code via the official MCP connector (default path, ~95% of intents) or the `ntn` CLI (only for file uploads, Notion Workers, headless/CI scripts, raw API discovery, shell piping). Routes intent to the right transport, pre-flights the Notion-flavored Markdown spec and target data-source schema, and pins the empirical gotchas not surfaced by tool descriptions or `ntn --help`. Use whenever the user wants to read, fetch, search, create, update, query, or organize Notion ...

Single-pass feature implementation using Explore → Code → Test. Ships focused changes at maximum speed, with a built-in circuit breaker that stops and recommends `/ultrapex` (or `/apex`) or `/forge` when the task turns out more complex than it looked. Use this whenever the user wants a quick win on a single, focused task — even when they don't say "oneshot" (e.g. "just", "quickly", "small change", "#42", or a GitHub issue URL for a small fix).

Bootstrap a new web project on a strictly opinionated Cloudflare Workers stack — Next.js 16 or Astro 6, TypeScript strict, pnpm, Biome, Tailwind. Use whenever the user asks to start, bootstrap, initialize, or scaffold a site/app in an empty or new directory. No fallbacks: skip for existing projects with package.json or framework config, non-Cloudflare deployments, Vercel/Netlify, ESLint/Prettier, or stack substitutions.

Turn a music brief into Suno v5.5-ready prompt artifacts — TRACK.md per generation, optional ALBUM.md for multi-track projects, optional ARTIST.md for artist-scoped identity. Artifact-emit-only — the user copy-pastes the prompt block into Suno's UI, listens, then iterates via `revise`. No API integration. Hardens the copyright contract — never lets artist names or copyrighted citations through into a prompt (legal exposure + Suno filters them anyway). Use when the user wants to make a song, p...

Outcome-driven end-to-end implementation for frontier models — scope the task, commit to an approach, build, and adversarially verify with parallel subagents, in one run. Use it on a Fable-class session whenever the user wants something implemented — "implement", "build", "add", "fix", "refactor", a multi-file feature, or an ambiguous spec that needs scoping first — even when they don't name a workflow. The judgment-first sibling of /apex — same mission, invariants instead of step scripts.

Create a looping background video — crossfade the loop point, encode optimized MP4 + WebM, optional poster frame. Use whenever the user has a video that needs to loop for web use (hero sections, backgrounds, landing-page ambience), wants to fix a visible jump at the loop point, or needs to optimize a clip for web delivery — even if they just say "make this loop smoothly" or "compress this for the site".

Author, audit, or polish a project README — clarity, structure (Pattern A per-section collapse / Pattern B grouped / Pattern C per-entry), wording concision, anchor integrity. Reads the repo first, proposes diffs, applies on approval. Use when creating, restructuring, auditing, optimizing, or polishing a README for clarity, concision, or scannable structure — "write readme", "audit readme", "polish readme", "clarify readme", "optimize readme", "restructure readme", README clarity/wording — fo...

Fixture for compound skills + npm tooling detection.

Fixture skill for repo-kind classifier tests.