Claude Skills by Mixard

Monthly staleness check for version-fragile skills - verify pinned versions and APIs against current releases via web search, file outdated-info issues. Use when asked to check pack freshness or when a scheduled sweep fires.

Release procedure for fable-pack - validate, bump plugin versions, changelog, push, refresh local plugin cache. Use whenever committing content changes to plugins/ in this repo.

Use when adding x402 payment execution to AI agents - paying 402-gated APIs, enforcing per-task spending budgets, or charging agents for an API. Covers the agentwallet-sdk MCP server (Base), OKX Agent Payments Protocol (X Layer, eip155:196), seller SDK doc locations per language, and fail-closed budget enforcement.

Use when orchestrating parallel Claude Code agents via the Claude DevFleet MCP server - planning projects into mission DAGs, dispatching agents in isolated git worktrees, monitoring progress, and reading structured reports. Covers exact tool signatures, the auto_dispatch draft-status gotcha, and concurrency limits.

Use when gating refactors, commits, or PRs on structural code health via the CodeScene MCP server (@codescene/codehealth-mcp). Covers the MCP config, the four standalone-mode tools, platform-only tools to avoid, and how to interpret 1-10 Code Health scores.

Use when building zero-cost scraping or data-enrichment pipelines on free API tiers. Covers Gemini free-tier model IDs and rate limits, the generativelanguage REST endpoint and payload, Notion API property JSON shapes, model fallback, and scraping-method choice.

Use when reading, searching, commenting on, or transitioning Jira issues via MCP or the REST API v3. Covers mcp-atlassian config, tool names, curl examples, the ADF comment schema, JQL patterns, and error troubleshooting.

Use when finding or evaluating Laravel packages (maintenance health, Laravel/PHP version compatibility, vendor reputation) via the free LaraPlugins.io MCP server. Covers the MCP endpoint config and the exact SearchPluginTool / GetPluginDetailsTool parameter schemas and filter values.

Use when implementing transactional email sending via the Mailtrap Email API or debugging non-delivery in dev/staging. Covers the exact production and sandbox send endpoints, Bearer auth, request payload shape, and the sandbox-vs-production routing pattern.

Use when configuring MCP servers in .claude.json or .mcp.json. Covers exact launch commands, package names, pinned versions, and hosted HTTP endpoints for common MCP servers (Jira, GitHub, Supabase, Playwright, fal.ai, Cloudflare, Vercel, and others).

Use when operating a self-hosted n8n instance (npm/systemd, no Docker) - importing workflows via CLI without an API key, exposing env vars to workflow expressions, credential export/import that keeps node links, and the Telegram human-in-the-loop pattern that avoids the broken sendAndWait node. Verified on n8n 2.8.

Use when converting, OCRing, extracting, redacting, watermarking, signing, or form-filling documents with the Nutrient DWS API. Covers the /build endpoint, instructions JSON schemas, redaction presets, OCR language codes, and the MCP server config.

Use when interacting with the X (Twitter) API programmatically - posting tweets, threads, media, reading timelines, or searching. Covers v2 endpoints, the v1.1 media upload endpoint, OAuth 1.0a vs Bearer token rules, reply/thread payload shapes, rate-limit headers, and error handling.

Use when running, testing, or deploying projects with Bun, or migrating from Node. Covers the bun.lock vs bun.lockb version change, Bun.serve/Bun.file/bun:test APIs, key CLI flags, Node compatibility, and Vercel setup.

Use when designing ClickHouse schemas or queries. Covers MergeTree engine selection, State/Merge aggregate combinators, materialized view patterns, system.query_log and system.parts introspection, and data type / insert gotchas.

Use when writing or reviewing schema migrations. Covers zero-downtime Postgres patterns (concurrent indexes, instant defaults, expand-contract) and tool-specific CLI workflows and gotchas for Prisma, Drizzle, Kysely, Django, TypeORM, and golang-migrate.

Use when reading ERC-20 balances, pricing tokens, or hashing Ethereum data in JS/TS/Python/Solidity. Covers per-chain token decimal drift with runtime decimals() lookup and WAD normalization, and the Node sha3-256 vs Keccak-256 mismatch with correct ethers/viem/web3 APIs.

Use when building short animated technical explainers (graphs, architectures, system diagrams) with Manim. Covers render commands and quality flags, output paths, and a reusable network-graph scene starter.

Use when packaging Python GUI apps into small, fast Windows installers with Nuitka standalone mode plus Inno Setup. Covers verified Nuitka flag recipes (anti-bloat, module exclusion, console-mode), 32-bit vs 64-bit size tradeoffs, dist slimming rules, DLL size analysis, Inno Setup LZMA2 template, and deprecated-flag gotchas.

Use when building or debugging Nuxt 4 apps with SSR, hybrid rendering, or data fetching. Covers routeRules (swr/isr/prerender), useFetch/useAsyncData usage, and Lazy-hydration specifics — hydrate-on-visible and other strategy props, defineLazyHydrationComponent, and the single-file-component/new-props-trigger-hydration gotchas.

Use when writing or tuning PostgreSQL. Covers the RLS initPlan wrap trick, SKIP LOCKED job queues, diagnostic queries for unindexed FKs and bloat, and index type selection.

Use when searching biomedical literature via PubMed or NCBI E-utilities — MeSH queries, PMID lookup, abstract/citation retrieval, or API-backed literature monitoring. Covers PubMed field tags, publication-type and date filters, MeSH subheading syntax, and the E-utilities REST endpoints with a working Python request pattern.

Use when writing, reviewing, or refactoring React 18/19 and Next.js code for performance. Covers waterfall elimination, bundle-size APIs, server-side gotchas, and version-specific/counterintuitive rendering behavior — Next.js 15 after(), React 19 Activity, useEffectEvent, optimizePackageImports, and the `&&`-renders-0 gotcha.

Use when writing or reviewing Remotion code (video creation in React). Covers compositions, frame-driven animation with interpolate/spring, calculateMetadata, media embedding, captions, transitions, Mediabunny metadata/frame extraction, fonts, charts, 3D, Lottie, and Tailwind.

Use when completing tasks, implementing major features, or before merging to verify work meets requirements. Dispatches a code reviewer subagent with a precisely scoped context.

Design statistically valid A/B tests and run a growth experimentation program — sample-size tables, hypothesis framework, ICE prioritization, velocity targets, and an experiment playbook template. Use when the user wants to test two versions, asks how long to run a test, mentions statistical significance, or wants a systematic experiment backlog.

Generate and iterate ad creative at scale — platform character limits (Google RSA, Meta, LinkedIn, TikTok, X), the grounded-inputs corpus method, angle-based variation, and a performance-iteration loop. Use for RSA headlines, bulk ad copy, ad variations, creative testing, or "write me some ads." For campaign strategy and targeting use the ads skill.

Plan and optimize paid campaigns on Google, Meta, LinkedIn, TikTok, and X — the Meta Andromeda-era playbook (broad targeting + creative volume), per-platform creative-vs-targeting ratios, retargeting windows and the 4-component retargeting framework, headline mirroring, and scaling discipline. Use for PPC, ROAS/CPA questions, retargeting, budgets, "should I run ads," or "when should I kill an ad."

Optimize content to get cited by AI search engines (Google AI Overviews, ChatGPT, Perplexity, Claude, Gemini, Copilot) — Princeton GEO visibility numbers, extractable content patterns, AI crawler robots.txt rules, llms.txt and pricing.md files, and citation-rate data by content type. Use for AEO, GEO, LLMO, AI Overviews, "optimize for ChatGPT," AI citations, or zero-click search questions.

Audit and optimize App Store and Google Play listings — platform indexation rules (what Apple vs Google indexes), character/byte limits, a weighted 6-dimension scoring rubric, brand-maturity-tiered evaluation, and conversion benchmarks (video lift, screenshot behavior). Use when the user shares an app store URL, asks why downloads are low, or wants keyword/listing optimization.

Reduce voluntary and involuntary churn — cancel flows with reason-matched save offers, exit surveys, churn risk signals and health scoring, dunning with smart retry timing, and recovery benchmarks. Use for cancel flows, save offers, failed payment recovery, pause subscriptions, win-back, "churn rate is too high," or "customers are leaving."

Write B2B cold emails and follow-up sequences that get replies, backed by reply-rate benchmarks, subject-line data, a 4-level personalization system, and follow-up cadence numbers. Use for cold outreach, prospecting emails, SDR sequences, "nobody's replying to my emails," subject lines, and breakup emails. For warm/lifecycle sequences this is the wrong skill.

Create competitor comparison and alternative pages for SEO and sales — four page formats with URL patterns, keyword targets, and section-by-section structures (singular alternative, plural alternatives, you-vs-competitor, competitor-vs-competitor). Use for "[Product] vs [Product]" pages, "[Product] alternative" pages, comparison landing pages, or battle-card-adjacent content.

Systematically edit existing marketing copy with the Seven Sweeps framework (clarity, voice, so-what, prove-it, specificity, emotion, zero-risk) and word-level replacement tables. Use when the user wants copy reviewed, tightened, polished, or refreshed — "edit this copy," "too wordy," "make this better" — rather than written from scratch.

Conduct and synthesize customer research — extraction frameworks for transcripts/surveys/tickets, watering-hole source maps by ICP, confidence guardrails, sample-bias checks, evidence-based persona templates. Use for VOC, review mining, Reddit/G2 research, JTBD analysis, persona building, or "find out why customers churn/convert/buy."

Plan the directory layer of a product launch — a tiered catalog of startup/SaaS/AI/MCP directories, the Product Hunt 3-week prep timeline and launch-day rules, the G2 10-reviews-in-30-days protocol, destination-page strategy (alternative/use-case/template pages), and 30/90-day KPI targets. Use for "submit to directories," backlink campaigns, Product Hunt launches, or G2/Capterra listings.

Design or fix the offer itself — the value equation, six-component offer anatomy (deliverable, bonus stack, guarantee, scarcity, name, payment structure), diagnostic loop, banned-vocabulary rules. Use for "my offer isn't converting," value stacks, guarantee design, scarcity/urgency, productizing a service. Best for services/coaching/high-ticket B2B; for self-serve SaaS see the pricing skill.

Create and optimize popups, modals, slide-ins, and banners that convert without annoying users — trigger thresholds (scroll depth, exit intent, time delays), conversion benchmarks by popup type, sizing and frequency-capping rules, and mobile/SEO compliance. Use for exit intent, email capture popups, announcement banners, sticky bars, or "collect emails with a popup."

Design or fix SaaS pricing, packaging, and monetization — value metrics, tier structure, price-increase strategy, Van Westendorp research, and pricing-page patterns. Use when the user asks what to charge, how to structure plans, whether to offer freemium, when to raise prices, or mentions pricing tiers, willingness to pay, or annual vs monthly.

Create or update a product marketing context document (.agents/product-marketing.md) capturing positioning, ICP, personas, competitors, objections, customer language, and proof points. Use at the start of a project before other marketing skills, or when the user mentions positioning, ICP, target audience, or wants to stop repeating foundational product info across marketing tasks.

Build SEO pages at scale from templates and data using the 12 pSEO playbooks (templates, comparisons, locations, integrations, glossary, directories, and more) without thin-content penalties. Use when the user wants "[keyword] + [city]" pages, comparison pages, template galleries, "generate 100 pages," or any data-driven page generation for search.

Build qualified, verified prospect lists across four motions — B2B SaaS, general B2B, local SMB, and early-stage demand-signal discovery — with a five-phase workflow, Hot/Warm/Cold scoring rubric, evidence and confidence rules, compliance guardrails, and lead-sheet output schemas. Use for "build a prospect list," "find leads," ICP-fit accounts, outbound lists, or "find my first customers."

Design revenue operations systems — lead lifecycle stages with entry/exit criteria, MQL fit+engagement scoring, routing and speed-to-lead rules, pipeline stage hygiene, deal-desk tiers, funnel benchmarks. Use for lead scoring, MQL/SQL definitions, marketing-to-sales handoff, CRM automation, "leads aren't getting to sales," or pipeline management.

Audit and diagnose SEO issues — crawlability, indexation, Core Web Vitals thresholds, on-page limits, hreflang/international SEO error catalog, and E-E-A-T. Use when the user asks why they're not ranking, traffic dropped, mentions technical SEO, meta tags, indexing issues, or says "help with SEO" — start with an audit.

Plan and build compliant SMS/MMS marketing — TCPA/A2P 10DLC/GDPR/CASL rules, phone number type selection (short code vs toll-free vs 10DLC), segment-encoding cost math (GSM-7 vs UCS-2), sequence templates with timing, and DTC benchmark ranges. Use for abandoned cart texts, welcome/win-back flows, promotional sends, Klaviyo/Postscript/Twilio questions, or "SMS vs email."

Use when generating images, video, or audio via the fal.ai MCP server. Covers MCP config, the tool set, model app_ids with per-model parameter schemas (Nano Banana, Seedance, Kling, Veo 3, CSM-1B, ThinkSound), and cost-estimate call shapes.

Use when cutting, reframing, or preprocessing video/audio with FFmpeg, or generating voiceover via the ElevenLabs API. Covers segment extraction, concat, loudnorm parameters, scene and silence detection, aspect-ratio crop formulas, and the ElevenLabs TTS endpoint.

Use when writing code against the VideoDB Python SDK (videodb package) for video upload, transcription, moment search, timeline editing, transcoding, reframing, generative media, RTSP/RTMP live streams, or desktop capture. Covers exact method signatures, enums, exception handling gotchas, and the WebSocket event workflow.

Use when integrating Apple's on-device LLM via the FoundationModels framework (iOS 26+). Covers SystemLanguageModel availability cases, LanguageModelSession, @Generable/@Guide guided generation, PartiallyGenerated snapshot streaming, tool calling, and the 4096-token context limit.

Use when adding an iOS share extension or custom keyboard extension to an Expo/React Native app via @bacons/apple-targets (expo-apple-targets, by Evan Bacon). Covers expo-target.config.js schema, App Groups data hand-off, EAS Build signing, share-extension activation rules and memory limits, keyboard RequestsOpenAccess constraints, and known prebuild bugs.