Teach engineering concepts for real understanding using the Feynman technique, strong metaphors, and diagrams (render via beautiful-mermaid). Use when users ask to explain/teach/break down engineering concepts, build intuition/mental models, understand trade-offs/failure modes/design choices, or want a visual diagram.

Performs authorized security scanning using static, dynamic, and vulnerability-focused methods. Use when mapping exposed services, profiling application behavior, and identifying known weaknesses for validation.

Browser automation using Vercel's agent-browser CLI. Use when you need to interact with web pages, fill forms, take screenshots, or scrape data. Alternative to Playwright MCP - uses Bash commands with ref-based element selection. Triggers on "browse website", "fill form", "click button", "take screenshot", "scrape page", "web automation".

Render Mermaid diagrams to SVG or ASCII/Unicode with beautiful-mermaid (Node/Bun/Deno/browser, no DOM). Use when you need Mermaid render without DOM.

Framework (OSS). Integrate Expo and React Native into an existing native iOS or Android app. Use for brownfield, embedding a React Native screen in SwiftUI/UIKit or Kotlin, or AAR/XCFramework packaging. Covers isolated and integrated approaches. For building or distributing a purely native app with EAS, use eas-app-stores.

EAS service (paid). Deploy Expo websites and Expo Router API routes to EAS Hosting - export the web bundle, run eas deploy for production and PR preview URLs, manage environment secrets and custom domains, and work within the Cloudflare Workers runtime. Also covers authoring API routes (+api.ts handlers, HTTP methods, request handling, CORS). Use when deploying an Expo web app or API routes, setting up EAS Hosting, or configuring hosting environments and domains. Not for native builds or store releases - use the eas-app-stores skill for those.

Evaluate Expo skills in this repo end-to-end - trigger accuracy, generated code quality, and runtime screenshots on iOS simulator and Android emulator via Expo Go (web optional). Use when the user wants to eval an Expo skill, test that a skill produces working code, benchmark a skill with device screenshots, or verify a skill's output renders correctly.

Create Obsidian Canvas files from text content, supporting both MindMap and freeform layouts. Use this skill when users want to visualize content as an interactive canvas, create mind maps, or organize information spatially in Obsidian format.

Infer gene regulatory networks (GRNs) from gene expression data using scalable algorithms (GRNBoost2, GENIE3). Use when analyzing transcriptomics data (bulk RNA-seq, single-cell RNA-seq) to identify transcription factor-target gene relationships and regulatory interactions. Supports distributed computation for large-scale datasets.

Unified Python interface to 40+ bioinformatics services. Use when querying multiple databases (UniProt, KEGG, ChEMBL, Reactome) in a single workflow with consistent API. Best for cross-database analysis, ID mapping across services. For quick single-database lookups use gget; for sequence/file manipulation use biopython.

Refresh Claude Ads platform, API, policy, regulation, benchmark, issue, pull-request, fork, and repository evidence. Use for ads research refresh, expired refresh_due dates, stale API or platform claims, reverify-or-demote decisions, release-current claim validation, ecosystem review, current platform changes, or updating paid-media knowledge. When tools or sources are unavailable, still demote the stale claim for the current run and block dependent release-current assertions before requesting access.

Converts X (Twitter) tweets and articles to markdown with YAML front matter. Uses reverse-engineered API requiring user consent. Use when user mentions "X to markdown", "tweet to markdown", "save tweet", or provides x.com/twitter.com URLs for conversion.

Posts content to Weibo (微博). Supports regular posts with text, images, and videos, and headline articles (头条文章) with Markdown input via Chrome CDP. Use when user asks to "post to Weibo", "发微博", "发布微博", "publish to Weibo", "share on Weibo", "写微博", or "微博头条文章".

Create, repair, validate, visually QA, and package Codex-compatible animated pets and pet spritesheets from character art, generated images, company or prospect brand cues, or visual references. Use when a user wants a lightweight-worker Codex pet workflow, a non-pixel custom pet style, a prospect or company mascot pet, or a full 8x9 animated pet atlas with transparent unused cells, QA contact sheets, and pet.json packaging. This skill composes the installed $imagegen system skill for visual generation and uses bundled scripts for deterministic spritesheet assembly.

Service performance monitoring with RED metrics (Rate, Errors, Duration) and runtime-specific telemetry for Java, .NET, Node.js, Python, PHP, and Go. Use when analyzing service health, SLA compliance, or runtime issues. Trigger: "service response time", "error rate", "throughput", "SLA compliance", "service mesh overhead", "JVM GC", "Java heap", "Node.js event loop", ".NET CLR", "Python threads", "PHP OPcache", "Go goroutines", "service performance", "p95 latency", "request failures", "database response time by name". Do NOT use for explaining existing queries, product documentation questions, infrastructure metrics (use dt-obs-hosts), log analysis (use dt-obs-logs), or distributed tracing workflows (use dt-obs-tracing).

Use this skill whenever anyone asks about migrating from Stytch to Descope — whether they're a developer doing it themselves or a technical lead evaluating the move. Triggers on: "how do I migrate from Stytch", "replace Stytch with Descope", "we're moving off Stytch", "Stytch to Descope", "switch from Stytch", "our app uses stytch / @stytch/nextjs / Stytch UI / Stytch SSO / Connected Apps / SCIM and we want to use Descope instead", or any question about Stytch features (Consumer authentication, Multi-tenant / B2B Authentication, Enterprise SSO, SCIM, Admin Portal, M2M Authentication, Connected Apps, Session Management, Fraud & Risk) in the context of Descope. Works for any language or framework with a Descope SDK. Always use this skill before producing migration guidance — do not rely on memory alone.

Use this skill for migrations from PingOne for Customers / PingOne CIAM to Descope. Trigger on requests such as "migrate PingOne to Descope", "PingOne CIAM to Descope", "replace PingOne for Customers", "move DaVinci flows to Descope", "PingOne customer auth migration", or questions about PingOne customer applications, populations, authentication policies, DaVinci, customer MFA, Protect, Verify, customer SSO, SCIM/provisioning, token claims, or PingOne APIs and supported client orchestration SDKs in the context of Descope. This skill is CIAM-only and must stop for workforce IAM, employee SSO, PingFederate, PingDirectory, PingAccess, PingID workforce auth, or general ForgeRock/PingOne Advanced Identity Cloud migrations unless the user explicitly says those products are in scope.

Build the project's shared language and bounded contexts before writing code, so names stay consistent and the agent stops paraphrasing domain concepts. Produces a CONTEXT.md glossary and decision records. Use at the start of a project or feature, or when the codebase and the people describing it speak different languages.

Handle the parts of a plan that can't be decided by talking — answer every question the PRD, prompt, or codebase can already settle, then resolve what's genuinely unknowable with timeboxed probes and manipulable prototypes, gating progress on the user actually understanding what was decided. Keeps its map and findings on disk so an effort can span many context resets. Use this alongside or inside an interview-based planning skill such as plan-with-docs, whenever the user answers "I don't know yet", says a plan feels premature, says they need to prototype first, says they don't understand what the agent produced, or when the work is too big for one session. Also use it when a previous plan turned out to be wrong once building started, or to resume a fogged effort already underway.

Build end-to-end data pipelines that fetch, analyze, synthesize, and visualize intelligence from Slack channels, documents, and other sources using incremental processing and AI extraction. Use when building "data pipelines", "intelligence gathering", "Slack analysis", or "data synthesis dashboards".