Dev Tools Reviews

pdfcn (shadcn-labs, MIT, 2,102 GitHub stars) explained through its official documentation and published benchmarks. Two Rust/WASM engines sit at the core - Takumi (Apache-2.0) and Forme (MIT) - and neither launches a browser or subprocess. An 80-line invoice renders cold in 176ms and warm in 26ms, against react-pdf at 236ms. Covers 20 blocks from six invoice styles to shipping labels, 24 components and 9 themes, with practical uses from payslips to e-invoicing.

Andrew Ng (@AndrewYNg) published 'AI Engineering Skills Map: Using coding agents' on X — an illustrated explainer with 2 diagrams. Of the 4 pillars (Building and deploying AI applications / Software engineering fundamentals / Using coding agents / Shaping the build) built from 10,000+ job postings, it focuses on Using coding agents: the dev workflow (Plan → Execute → Deploy/Monitor) and 5 key skills (Directing the Workflow, Enabling Agent Autonomy, Reviewing the Work, Customizing the Agent and Its Environment, Coding Agent Foundations). Covers the mindset shift from 'let agents run' to 'direct + verify', plus a practical 5-step roadmap.

On Sep 3, 2026, Matt Pocock (Total TypeScript author, ex-Vercel, ~300K followers) called the Claude Code skill "show-me" a "phenomenal skill", gathering 6,390 likes. It makes PR descriptions dramatically easier to read by using visual diagrams instead of walls of text. This article explains the mechanism and concrete usage in code review and PR review workflows. Created by Dexter Horthy, CEO of HumanLayer (YC F24).

show-me is a skill that makes AI agents (Claude Code) explain the current topic visually — pseudocode for logic, call trees for control flow, component trees for UI, Mermaid for data flow, diffs for changes, and focused HTML artifacts for dense concepts. MIT-licensed from HumanLayer; install in one command, invoke with /show-me. All 8 output formats with examples.

Use Meta Muse Spark 1.3 Contributor for free on OpenCode Zen ($0) or Go ($10/month, 45,300 req/5h). The catch: Contributor tier allows your prompts and completions to train future Meta models. Setup in 4 steps, benchmark highlights (DeepSWE 75.4), and Contributor vs Standard guidance.

Complete guide to Obscura, the Rust open-source headless browser (24,000+ stars, Apache 2.0). 30 MB memory, 85 ms page load — about 6x faster than Chrome. Drop-in replacement for Puppeteer/Playwright with CDP & MCP support, plus Stealth Mode. The technical origin of Cloudflare Kitesurf. Install and 3 ways to use it.

Complete roundup of the 10 best websites to get DESIGN.md (Google's open-sourced design spec for AI agents), with each site's own image. Refero Styles (2,000+), DesignMD, OpenDesign, designmd.supply, getdesign.md (550+), Aura, Neuform, Hyperbrowser, TypeUI, MotionSites AI. Includes how to choose by type and how to use them.

OpenCode 2.0 (beta) fully explained. TUI, desktop, and web share the same backend and sync automatically. V1 comparison, 3 breaking changes, installation, usage, and migration, based on official docs for beginners.

Google XLS / DSLX explained for beginners: how this open-source HLS toolchain turns Rust-like DSLX code into synthesizable Verilog/SystemVerilog. Full pipeline (interpreter, ir_converter, opt, codegen), DSLX language reference links, and step-by-step start guide (Colab, binary, source build) — based on official docs.