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    PromptLint

    ESLint for LLM prompts. Your prompts have bugs. PromptLint f

    PromptLint

    PromptLint

    ESLint for LLM prompts. Your prompts have bugs. PromptLint f

    A
    Aryaan Sheth

    Screenshots

    Screenshot 1
    Screenshot 2
    Open Source
    Free
    DevTool
    Security
    Built with
    PythonPython
    VercelVercel
    TypescriptTypescript

    PromptLint is a static analyzer for LLM prompts — think ESLint, but for the text driving your AI pipelines.

    Most teams ship prompts with zero guardrails. PromptLint catches the bugs before they hit production: injection attacks, token waste, vague language, and missing structure. No API calls, no latency, results in milliseconds.

    What it catches:

    • Prompt injection: detects role-hijacking and "ignore previous instructions" patterns before they reach your pipeline
    • Token bloat: flags politeness filler, redundant phrasing, and structural waste burning your API budget
    • Missing structure: warns on prompts lacking delimiters, output format specs, or role definitions that degrade output quality
    • Cost projection: estimates token cost at real-world scale so you know the budget impact before you ship

    How it works:

    • VS Code extension: inline linting as you type, squiggly underlines and lightbulb auto-fix, just like ESLint
    • CLI tool: drop it into any pipeline as a pre-commit hook or GitHub Action, fails builds on CRITICAL issues
    • Auto-fix: safe changes applied automatically, ambiguous rewrites shown as suggestions you approve

    Built for prompt engineers, AI developers, and any team shipping LLM features who wants their prompts to be secure, efficient, and consistent.

    VBM
    Vyshnav TR & 3 others upvoted
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