Practical day-1 guide to building applications in Rust well. Covers the mental model (ownership, errors as values, traits-not-interfaces), day-1 decisions (String vs &str, Box vs Rc vs Arc, dyn vs impl Trait, anyhow vs thiserror), idioms to internalize early, anti-patterns to avoid, and a tight crate shortlist (tokio, serde, anyhow, clap, reqwest, tracing, axum, sqlx). Use when starting a new Rust project, learning Rust coming from Python/JS/Go/Java/C++, deciding on types and lifetimes, choosing crates, structuring modules, configuring Cargo.toml/clippy/rustfmt, writing tests, benchmarking, profiling, speeding up builds, or releasing and distributing a binary, or whenever the user mentions Rust, cargo, ownership, borrow checker, lifetimes, traits, async Rust, testing, or "writing this in Rust".
GitHub CLI for remote repository analysis, file fetching, codebase comparison, and discovering trending code/repos. Use when analyzing repos without cloning, comparing codebases, or searching for popular GitHub projects.
Build, secure, and optimize production MCP servers with the TypeScript SDK (spec 2025-11-25, SDK v1.29 / v2 beta). Use when building or reviewing MCP servers or tools - covering transports, tool and schema design, error handling, security and OAuth, performance, known SDK bugs, content vs structuredContent delivery, v2 migration, MCP Apps, extensions, and the Registry.
Pre-release code review - runs lint/type checks, launches parallel review agents (cleanliness, design, efficiency, side-effect gating) on the diff, validates findings, and fixes with approval. Use before committing, pushing, or releasing changes.
Conducts deep, multi-angle research using glim MCP tools and parallel subagents. Use for deep research, competitive landscape analysis, strategic intelligence, or /deep-research-glim [topic]. Triggers - deep research, deep dive on, competitive landscape, strategic intelligence, multi-source synthesis.
Save a live webpage as a high-fidelity PDF that preserves the original layout AND every image (including lazy-loaded ones) using the agent-browser CLI. Use this whenever the user asks to "download this page as PDF", "save this article", "archive this URL", "fetch this page for reference", or otherwise wants a local PDF of a web page that looks like the browser version. Especially important on modern JS-heavy sites (engineering blogs, Next.js sites, anything with IntersectionObserver lazy loading) where naive `chrome --headless --print-to-pdf` or a bare `agent-browser pdf` produces blank rectangles or broken-image placeholders. Trigger this skill even when the user does not name the tool - any request to capture a webpage's full visual content as a PDF on disk should pull this in. For reader-mode/article-only output (no nav, no footer, no manual trimming) prefer percollate instead - see "When NOT to use this".
Comprehensive Effect-TS development guide for TypeScript, focused on Effect v4 (the recommended default) with full v3 (stable) support for existing codebases. Use when building, debugging, reviewing, or generating Effect code: typed errors, fibers, Context/Layers, Scope, Schedule, streams, Schema, observability, HTTP, Config, SQL, CLI, RPC, STM, and Effect AI. Includes exhaustive wrong-vs-correct API tables to prevent hallucinated Effect code. Triggers when code imports from 'effect', '@effect/platform', '@effect/ai', or '@effect/sql', or the user mentions Effect-TS, functional TypeScript, Context, Layer, or Schema from Effect.
Build Grafana dashboards as code with the grafana-foundation-sdk typed builders (TypeScript or Go). Use when creating, modifying, or generating Grafana dashboard JSON programmatically, converting hand-written dashboard JSON to typed code, building monitoring dashboards, or working with Prometheus/Loki queries in dashboards.