AI repos for Prompt engineering
Open-source AI projects built around Prompt engineering or genuinely useful if you work with it, each with what it does for you. 26 repos, most relevant first.
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system_prompts_leaks
Read real vendor system prompts for Claude, ChatGPT and Grok to learn how they instruct models.
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awesome-gpt-image-2
Copy from 544 categorized GPT Image 2 prompt cases and 20+ reusable templates with a structured prompt schema.
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dive-into-llms
Has a prompting chapter with slides, a tutorial and a runnable notebook.
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12-factor-agents
Covers owning your prompts and context window for context engineering.
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stop-slop
Ready-made instruction files with banned phrases and sentence rules that make LLM writing read as human.
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vibe-coding-playbook
XML prompt templates for domain tasks and planning-first feature work.
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leanctx
Compresses long prompts locally while keeping code and tool calls exact, cutting token costs without rewriting prompts.
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5-persona-advisory-board
A single SKILL.md prompt that interviews you, then applies five strategic lenses to produce a decision brief.
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andrej-karpathy-skills
Shows four concise behavioral rules for steering LLM coding output through a instruction file.
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skills
Learn how to structure instructions and the Agent Skills spec with a starter template.
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caveman
Rule file that makes agents answer tersely, plus middleware to shrink prompts.
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humanizer
A worked example of encoding 26 writing patterns into a skill prompt with draft, critique, final steps.
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i-have-adhd
Editable response rules show how to shape agent output style with a skill.
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academic-research-skills
Study structured prompts and staged confirmations for drafting, simulated peer review and citation integrity checks.
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Pixelle-Video
Uses LLM prompts to turn a single topic into a script and per-scene image prompts.
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gallery
Prompt Lab workspace to test and compare prompts against on-device models.
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easy-vibe
Teaches how to describe what you want to an AI so it builds the right software.
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ai-berkshire
Examples of task-specific skill prompts with anti-bias and number cross-check rules.
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ian-xiaohei-illustrations
Shows a structured prompt and QA checklist approach for getting consistent image-generation style from an agent.
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evolver
Generates structured improvement prompts from past agent runs instead of ad hoc prompt tweaks.
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eve
Keeps agent instructions in Markdown files you edit directly.
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loopy
Published loops give tested prompt, check and stop-rule patterns to adapt.
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llms-txt
Write an llms.txt markdown file so language models get a clean summary and links to your docs.
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minto-pyramid-skill
A worked example of a carefully scoped skill prompt with named operations and documented limits.
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ai-marketing-panel
Shows how to structure persona dossiers and independent seat prompts, then synthesize their critiques while keeping dissent.
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skills
Markdown skill playbooks show how to write grilling, review and plain-writing instructions for agents.