prompt-engineer SKILL.md skillA
prompt-engineer from aznatkoiny/zai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aznatkoiny/zai-skills/prompt-engineer@git:20261010.5b03da5Pins git:20261010.5b03da5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aznatkoiny/zai-skills
- Path
AI-Toolkit/skills/prompt-engineer/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261010.5b03da5, committed Oct 10, 2026
- Size
- 16,907 bytes
- Repository stars
- 10
- License
- MIT
Write, review, debug, and migrate prompts for Claude models (Fable 5.1, Opus 5.5, Sonnet 5.5, Haiku 5.5) using Anthropic's official prompt engineering guidance. Covers system prompts, agent and harness prompts, tool descriptions, few-shot examples, and effort/thinking settings. Use this whenever the user wants to create or improve a prompt or system prompt. Also use it when they ask why Claude is behaving a certain way: too verbose or too terse, stops early or asks permission mid-task…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Prompt engineer Help the user get the behavior they want from a Claude model by writing or changing the words, and sometimes the API settings, that the model sees. The guidance here comes from Anthropic's prompt engineering docs (fetched 2026-10-09). It is current for Claude Fable 5.1 / Mythos 5.1, Opus 5.5, Sonnet 5.5, and Haiku 5.5. ## Reference files Read only what the task needs. The files are long, so grep for the section you want instead of reading top to bottom. | File | Read when | |---|---| | `references/best-practices.md` | Any prompt work. General techniques for all current models, with many ready-to-use sample blocks: clarity, examples, XML, long context, formatting, prefill migration, tool use, parallel calls, thinking, agentic and long-horizon work, overeagerness, hallucination, frontend design. | | `references/models/fable-5-1.md` | Target is Claude Fable 5.1 or Mythos 5.1 | | `references/models/opus-5-5.md` | Target is Claude Opus 5.5 | | `references/models/sonnet-5-5.md` | Target is Claude Sonnet 5.5 | | `references/models/haiku-5-5.md` | Target is Claude Haiku 5.5 | …
Read the whole file at its exact version.
How to install
mdr add aznatkoiny/zai-skills/prompt-engineer@sha256:ca12edda42647a17The line at the top of this page pins the label git:20261010.5b03da5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_qzw4l6fqfmygd3jt)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 10, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16907 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
aznatkoiny/zai-skills · 10 stars · license MIT · pushed 2026-11-07 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_qzw4l6fqfmygd3jt GET https://markdownregistry.com/api/v1/resolve?ref=aznatkoiny/zai-skills/prompt-engineer GET https://markdownregistry.com/api/v1/blob/ca12edda42647a17d7ed703ac426293764a787c5ba0b3befeb7eee931d2beb7b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from aznatkoiny/zai-skills
Every file in aznatkoiny/zai-skills