hallmark
What it is
Anti-slop design skill for Claude Code, Cursor, and Codex. Anti-patterns, a slop-test gate, and twenty themes with distinct macrostructures — it refuses to ship generic UI.
Featured in
Issue #6 — Skill Files Eat the Stack · — the full issue has that week's other tools, reads, and big-lab releases.
More coding tools we've covered
- anti-slop Fifteen opinionated Oxlint rules that reject low-evidence TypeScript and JavaScript: chained type assertions, `unknown` parameters and returns, runtime `typeof` checks, module mocking, widen-then-assert. It is meant to be vendored rather than depended on — an agent skill copies the plugin in, merges the lint config, and then the files are yours to edit.
- Prime Agent A coding and research agent for long-running autonomous work, built on a Recursive Language Model — context as variables, subagents as function calls inside a persistent IPython REPL — plus a Continual Harness that keeps supplemental prompts, memories, and skills as durable state it refines with small evidence-backed updates.
- book-to-skill Converts technical books, PDFs, EPUBs, and document folders into structured agent skills — a SKILL.md mental model, chapter files loaded on demand, a glossary, and cheatsheets — for Claude Code, Copilot CLI, and Amp. Claims 24×–51× fewer tokens than dumping the book into context.
- Matt Pocock Skills A collection of composable agent skills for real engineering work — TDD, code review, debugging, domain modeling. Written to work across models, not just one vendor's CLI.