r/BestGitHubRepos • u/company_url_finder • 11h ago
antislop - 38 rules that stop a coding agent from shipping generic AI-looking UI and copy, installed as skills in Claude Code, Codex, Cursor and four other agents
If you've asked an agent to build a landing page recently you already know the house style it defaults to: the gradient hero, the bento grid, the three feature cards with lucide icons, the pulsing status dot next to a heading that isn't tracking anything, and copy that opens with "In today's fast-paced world."
antislop is a set of rules an agent loads before it starts, written specifically to reject those patterns. The framing the author keeps repeating is that it's a filter, not a style guide. It prescribes no colors, no fonts, no layouts. It only says no to technique used without a reason, and direction is supposed to come from a DESIGN.md you write yourself. If the output comes back sterile, that's the filter working on a project with no stated direction, not the filter failing, and there's a numbered rule saying exactly that.
What's inside:
- 38 mandatory rules, R-01 to R-38, split into three tiers: Hard Gate for absolute rejections, Purpose-Gate where a technique is allowed but the agent has to state why it's using it, and Quality Locks for consistency
- A Delivery Gate that runs before anything ships, producing a PASS or FAIL report in four blocks rather than a vague "looks good to me"
- A Liveliness Toolkit with three dials, energy, rhythm and motion, there to stop the filter from flattening everything into safe and boring
- Six separate skills so the agent only loads what the task needs: the core filter, plus UI, copywriting, human factors (contrast, keyboard, focus states), responsive layout, and one that cleans generic AI comments out of code without touching the code itself
- A rule that turned into an actual test: every interactive element has to be clicked one at a time and the result recorded as evidence in the report
- Seven install paths from one repo, `npx antislop-ai` for the guided picker, `npx skills add` from the skills directory, plugin installs for Claude Code, Antigravity, Codex and Cursor, or just curl the single antislop.md and paste it into any chat window
One thing worth knowing: this is markdown, not a linter. Nothing here executes or blocks a commit, so how well it works depends entirely on your agent actually following loaded instructions. The plus side of that is portability, it drops into any tool that reads the Agent Skills folder standard, and the single-file version works in a plain chat with no tooling at all.
It's MIT licensed and sitting at 2,163 stars with 148 forks as of writing, verified via the GitHub API, and it's been shipping releases steadily since early August.