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Best agent skills for prompt engineering

We found 172 agent skills for prompt engineering in the catalog; these are the 15 that rank highest. The order comes from our rank, which weighs adoption, freshness, documentation and publisher identity. Nobody can pay for a place on this list. natural, research-writing-prompts and venice-characters lead it. prompt-optimizer is published by the company that makes it. prompt-engineer comes from the largest repository here (12,039 stars). 11 of the 15 had activity in the last 30 days. Each entry lists why it made the list and links to its install page.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

Top 15 of 172

  1. 1
    natural

    NPC-Worldwide

    Render the provided prompt template with Jinja context and send it to the active NPC's LLM.

    • Repository has 1.5K stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 1.5KLast active Oct 12, 2026Claude Code, Claude apps, Codex, Cursor +6

  2. 2
    research-writing-prompts

    QJHWC

    Use when the user wants paper-writing prompt templates or wants Codex to automatically choose and apply the best prompt logic for tasks such as 翻译, 润色, 改写…

    • Active in the last 30 days

    ★ 639Last active Oct 11, 2026Claude Code, Claude apps, Codex, Cursor +6

  3. 3
    venice-characters

    veniceai

    Discover and use Venice public characters (persona-driven system prompts with a suggested model).

    • Active in the last 30 days
    • Open source (MIT)

    ★ 155Last active Oct 5, 2026Claude Code, Claude apps, Codex, Cursor +6

  4. 4
    lintlang

    hermes-labs-ai

    Use when writing or reviewing AI agent configs, system prompts, or tool definitions (JSON/YAML/Python) and you need to catch ambiguous tool descriptions…

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 143Last active Oct 20, 2026Claude Code, Claude apps, Codex, Cursor +6

  5. 5
    lintlang-audit

    hermes-labs-ai

    Audit a named AI agent config, system prompt, tool-definition or instruction file (YAML, JSON, Markdown, text, or Python) with the released LintLang CLI, on…

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 143Last active Oct 20, 2026Claude Code, Claude apps, Codex, Cursor +6

  6. 6
    optimize-prompt

    mimimaster

    Rewrite system prompts, tool descriptions, and agent instructions into dense, contract-style, XML-bounded specs with a before/after comparison.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 142Last active Oct 8, 2026Claude Code, Claude apps, Codex, Cursor +6

  7. 7
    optimize-prompt

    mimimaster

    Refactor system prompts, tool descriptors, and agent instructions into high-density, contract-driven, XML-structured production specifications.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 142Last active Oct 8, 2026Claude Code, Claude apps, Codex, Cursor +6

  8. 8
    prompt-optimizer

    getsentryOfficial

    Creates, optimizes, and iteratively refines agent prompts, system prompts, developer prompts, and reusable prompt templates.

    • Published by the vendor
    • Repository has 1.1K stars
    • Open source (Apache-2.0)

    ★ 1.1KLast active May 4, 2026Claude Code, Claude apps, Codex, Cursor +6

  9. 9
    llm-patterns

    alinaqi

    AI-first application patterns, LLM testing, prompt management

    • Open source (MIT)

    ★ 711Last active Sep 8, 2026Claude Code, Claude apps, Codex, Cursor +6

  10. 10
    prompt-engineer

    https://github.com/Jeffallan

    Writes, refactors, and evaluates prompts for LLMs — generating optimized prompt templates, structured output schemas, evaluation rubrics, and test suites.

    • Largest repository here (12,039 stars)
    • Active in the last 30 days
    • Open source (MIT)

    ★ 12KLast active Oct 16, 2026Claude Code, Claude apps, Codex, Cursor +6

  11. 11
    llm-application-dev

    MoizIbnYousaf

    Building applications with Large Language Models - prompt engineering, RAG patterns, and LLM integration.

    • Repository has 1.2K stars
    • Open source (MIT)

    ★ 1.2KLast active May 3, 2026Claude Code, Claude apps, Codex, Cursor +6

  12. 12
    prompt-engineering-expert

    CraftOS-dev

    Advanced expert in prompt engineering, custom instructions design, and prompt optimization for AI agents

    • Active in the last 30 days
    • Open source (MIT)

    ★ 400Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

  13. 13
    dspy-bootstrap-fewshot

    OmidZamani

    Use for BootstrapFewShot, bootstrapped demonstrations, teacher-model demos, and low-data DSPy prompt optimization.

    • Open source (MIT)
    • Ships helper scripts
    • For Python

    ★ 124Last active Jun 23, 2026Claude Code, Claude apps, Codex, Cursor +6

  14. 14
    senior-prompt-engineer

    foryourhealth111-pixel

    World-class prompt engineering skill for LLM optimization, prompt patterns, structured outputs, and AI product development.

    • Repository has 3.8K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 3.8KLast active Oct 18, 2026Claude Code, Claude apps, Codex, Cursor +6

  15. 15
    filescom-ai-assistant-personalities

    Files-com

    An AI Assistant Personality defines a system prompt used to customize the in-app AI Assistant.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 46Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

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