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Cert-Lifecycle-Harness guides certificate renewal, migration, and audit through inventory, risk assessment, planning, layered review, execution, rollback, and verification. It produces L3 decision, L2 strategy, and L1 execution documents so reviewers can work in bounded time, and it may perform Import or Modify writes only after six gates are satisfied. Delete operations stay script-only, while cloud APIs, kubectl, and production changes still require explicit authorization and human approval.

cm-committee routes a methodology question to a structured debate among seven independently deployable scholarly perspectives, including systems dynamics, urban systems, spatial statistics, Bayesian workflow, and leverage-point thinking. Each lens is grounded in primary sources, states where it should defer, and can be used alone or orchestrated with others. The result is a disciplined thinking aid, not an authentic statement from any scholar and not a substitute for factual research.

research-agent is a set of three system prompts rather than a standalone program. A lead agent plans the question and delegates up to 20 parallel workers, research subagents gather facts within a tool budget, and the lead synthesizes their results into Markdown before a citations agent adds attribution without changing the prose. It is intended for hosts that can run subagents and research tools, and the prompts enforce source-quality and role boundaries.

VirtualSMS exposes physical-SIM phone numbers for receiving verification SMS and OTP codes across more than 145 countries and 2,500 services. The Agent Skill can be used from Claude, Cursor, Codex, Windsurf, OpenClaw, and other MCP-aware clients through an MCP server, REST API, or x402 pay-per-call endpoints. Pricing is returned at request time rather than hardcoded; MCP use requires the service configuration and an API key, while x402 uses USDC on Base.

imessage-spam-cleanup scans the Messages chat database read-only, classifies conversations as spam, normal, or unknown, and creates a human-readable report before anything is removed. After explicit approval, it uses Messages.app UI automation, protects whitelisted contacts, and relies on the app's Recently Deleted area for 30-day recovery. The skill requires macOS 14 or later, a signed-in Messages.app, Full Disk Access, Accessibility permission, and Python 3.9+.

Urban Experience UI guides an agent from a chosen city and vibe to a complete frontend brief. It researches architecture, lighting, street rhythm, and materials, records design decisions, builds a storyboard and compiled specification, then implements HTML, CSS, and JavaScript with responsive and reduced-motion considerations. The city is treated as research input rather than a visual template to copy, and the workflow includes checks intended to prevent repetitive or low-quality generated layouts.

jackson-wang.skill distills public interviews, posts, performances, and works into five mental models, eight decision heuristics, and a style reference for advisory or role-play conversations. It can switch among Cantonese, English, Mandarin, and Korean and recognize recurring references. The project explicitly treats its answers as inferences from public material rather than Jackson Wang's real opinions; its research cutoff is April 2026 and private thoughts are out of scope.

humanizer rewrites text to sound more natural without changing API names, product names, or version numbers. It detects 18 patterns such as inflated vocabulary, filler transitions, passive voice, excessive em dashes, vague attribution, and formulaic conclusions, then adjusts the tone for design documents, READMEs, code comments, emails, or Slack. It works as a Claude Code or opencode skill and focuses on language style rather than technical correctness.

ATS Resume Builder deconstructs a target job posting, maps its requirements to the candidate's real background, and rewrites bullets with an action, metric, and result structure. Each run produces an ATS-clean resume, a recruiter-readable version, a keyword-gap report, and tailoring notes. The skill follows Canadian conventions such as city-and-province formatting, Canadian English, and omitting photos, birth dates, and marital status, so its guidance is calibrated primarily for that market.

Context Window Management adds operational rules for long Claude Code runs: hard caps on subagent handoffs, a marker-line protocol that accounts for injection and truncation, a launch-turn barrier before merging results, and eight named anti-patterns. Use it before kickoff only when at least two conditions hold: raw tool output is large, several agents reuse the same artifact, or three or more parallel branches need to be merged. If only one condition holds, the project recommends a flat plan instead.

Council selects three thinking personas from a pool of five based on the user's situation, gathers their independent views, and lets a JUDGE synthesize them while representing the two absent perspectives. It offers a lightweight role-play mode and a heavier mode with three parallel executions, using Regret, Reversibility, and Alignment as evaluation axes. The skill supports personal choices such as career, relationships, money, and ethics; it is not for fact lookup, technical implementation decisions, decisions for someone else, or urgent life-and-death situations.

app-store-connect-skill provides terminal commands for listing apps, uploading resized App Store screenshots, reading reviews, managing TestFlight groups, and submitting an update for review. Interrupted uploads can resume by sending only the missing pieces. The documented setup targets Windows 10 or 11 and requires a stable connection plus an Apple Developer Team ID and API key file, so it is intended for operators who already have access to the relevant developer account.

This Claude Skill prototype creates a 20-question multiple-choice English reading session from two or three authentic passages. Questions cover tone, main idea, vocabulary, references, restatement, analogy, and other UTBK/TOBK literacy skills, with a 20-minute timer, one-question navigation, automatic scoring, category breakdowns, and answer review. It relies on Claude Skills and Visualizer, works best in a desktop browser, and may not render well on mobile devices.

SPRUCE SQL Advisor grounds Claude in AWS Cost and Usage Report 2.0 schemas and the green-operations columns added by SPRUCE. It covers nested arrays, BILLING_PERIOD partition semantics, Athena and DuckDB syntax differences, and the meaning and units of carbon, electricity, and water fields. The skill is aimed at FinOps and GreenOps queries against this specific data shape, rather than general-purpose SQL assistance.

production-ready asks what quality means for the current project, combining baseline rules such as secret-free code, boundary validation, specific error handling, no leftover placeholders, and focused functions with custom requirements for tests, auth, database, logging, CI, or rate limits. It applies those standards as Claude writes and explains any proposed shortcut instead of silently weakening the result. A separate check command reviews existing code against the saved standards.

apca-contrast-skill bundles a deterministic Python implementation of APCA-W3 that measures Lc for text and background pairs, looks up passing font sizes and weights, audits Tailwind v4 light and dark tokens, and reverse-solves a color for a target Lc. It accepts common CSS color notations and needs no third-party Python package. APCA is still a WCAG 3 draft model, so legal accessibility work also needs a WCAG 2.x ratio check; alpha, wide-gamut displays, typography, and vision conditions need additional judgment.

Chiron accepts repositories, PDFs, vocabulary CSVs, and research papers, then produces a self-contained interactive lesson HTML. It supports separate learning paths for code, medicine, and language, using a five-stage ingest, generate, validate, build, and assemble pipeline with structured-output retries. Each lesson has its own SQLite state, while the parent Claude Code agent handles the text-LLM steps.

lets.skill distills public posts, interviews, and livestream material about the Chinese internet phenomenon known as Wanxue into response and expression frameworks. It offers role-play, researcher-oriented event analysis, trap-question detection, and a separate language-literature branch. The project states that it is not authorized or endorsed by the person represented, uses material current through 2025, and treats undisclosed topics as framework-based inference rather than a real private reaction.