okhp3-custom-gpt-builder SKILL.md skillA
okhp3-custom-gpt-builder from okhp3/skillz is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add okhp3/skillz/okhp3-custom-gpt-builder@v1.3.0Pins v1.3.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- okhp3/skillz
- Path
.agents/skills/okhp3-custom-gpt-builder/SKILL.md- Versions recorded
- 2
- Latest version
- v1.3.0, committed Aug 26, 2026
- First version recorded
- Jul 24, 2026
- Size
- 20,343 bytes
- Repository stars
- 3
- License
- MIT
Build, audit, and improve OpenAI Custom GPTs with production-grade methodology. Use this skill when the user asks to create, configure, test, evaluate, audit, improve, troubleshoot, compare, document, or package a Custom GPT or reusable ChatGPT workflow. Also use it for GPT Builder instructions, knowledge files, Actions, Apps/connectors, GPT Store readiness, Gemini Gem comparison, Copilot declarative-agent comparison, or conversion between Custom GPTs and Agent Skills.
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
# okhp3-custom-gpt-builder **OverKill Hill P³** · [overkillhill.com](https://overkillhill.com) · [github.com/OKHP3](https://github.com/OKHP3) A production-grade methodology for designing, building, testing, and maintaining OpenAI Custom GPTs. Treats GPT creation as product engineering, not prompt tinkering. > **Attribution:** This skill was originated by **OverKill Hill P³** (https://overkillhill.com) and is licensed under CC BY 4.0. Attribution is required in all derivative works. See `LICENSE.md`. ## Current-platform verification rule Platform details change frequently. Before stating limits, feature availability, pricing, model behavior, GPT Builder constraints, Actions/App compatibility, Gemini Gem capabilities, or Copilot agent behavior as definitive, verify against current official documentation or clearly label the statement as unverified. Prefer stable design principles over brittle platform trivia. ## What This Skill Covers This skill guides the full lifecycle of Custom GPT development: 1. **Product definition** (job-to-be-done, user, scope, acceptance criteria) 2. **Instruction architecture** (layered system prompt, no-contradictions rule) …
Read the whole file at its exact version.
How to install
mdr add okhp3/skillz/okhp3-custom-gpt-builder@sha256:8f8a9b22e802a1baThe line at the top of this page pins the label v1.3.0, 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_47df3dzerbnqow6i)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 24, 2026 and Aug 26, 2026, about one every 33 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.3.0 latest | 2026-08-26 | 7647b43 | 20,343 B | A | view · diff |
| v1.3.0 | 2026-07-24 | 3026887 | 19,682 B | A | view |
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 (20343 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
okhp3/skillz · 3 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_47df3dzerbnqow6i GET https://markdownregistry.com/api/v1/resolve?ref=okhp3/skillz/okhp3-custom-gpt-builder GET https://markdownregistry.com/api/v1/blob/8f8a9b22e802a1ba8c027b64c447c97e73952cef15822a159c3708f87f5cfd1f
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.