Open-Source Antislop Filters Generic AI Output Across 7 Coding Agents
A 3,500-star open source rules pack forces AI coding agents to strip out generic hero sections, invented metrics, and useless comments before shipping.
- antislop is an MIT-licensed rules pack that stops AI coding agents from shipping generic UI, copy, and comments.
- Ships 38 mandatory rules in three tiers plus a PASS/FAIL Delivery Gate run before output is delivered.
- Installed via
npx antislop-ai, works with Claude Code, Cursor, Codex, Copilot, Antigravity, Gemini CLI, Hermes, OpenCode, Kimi Code. - Split into optional skills for UI, copywriting, accessibility, mobile layout, and code comments so context stays small.
- Two modes: During guides new builds, After audits existing code with a numbered fix list you approve.
- Filter only, no colors or fonts prescribed; visual direction comes from your own
DESIGN.md.
Antislop gives coding agents a filter for generic output
Landing pages generated by Claude Code, Cursor, or Codex often converge on the same details: sparkle logos, beta pills, decorative terminals, implausible latency figures, and invented ROI claims. The open-source antislop project targets those defaults through a reusable set of agent instructions. Its GitHub repository has attracted roughly 3,500 stars.
The project instructs agents to reject common patterns in generated interfaces, marketing copy, accessibility work, mobile layouts, and code comments. Teams provide their own visual direction through a DESIGN.md file. Because antislop operates as an instruction layer, compliance depends on the agent following the loaded rules.
Inside the filter
The core file defines 38 mandatory rules, numbered R-01 through R-38, across three enforcement tiers:
- Hard Gate: absolute prohibitions.
- Purpose Gate: techniques that require an explicit reason.
- Quality Locks: checks for consistency across the result.
Several supporting components extend those rules:
- Liveliness Toolkit: three controls named
ENERGY,RHYTHM, andMOTION, plus a Design Read intended to prevent sterile results. - Delivery Gate: a required four-part
PASS/FAILreport that the agent completes before delivery. - Optional skills: focused instruction sets for UI, copywriting, accessibility, mobile layout, and code comments.
Separating the skills keeps prompts smaller and lets teams load only the relevant rules. A marketing repository can use
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