harness

Source-of-truth feature specs with preflight/postflight gates that stop agent drift

Live web-app verification — drive real browser flows via Playwright MCP, assert console and network health

User stories, task breakdowns, and PRD writing

Shared conventions, coding style, and meta-skills

Design review — layout + responsive behavior, design systems, usability heuristics, and user flows

Edge case discovery, bug review, and regression checking

Unit, integration, and end-to-end test generation

An open-source way of work for AI-assisted building — Claude Code plugins with second-brain (Obsidian) support and tracker (Linear) integration

System design, tradeoff analysis, and architecture decision records

README generation and API documentation