harness-door-pattern SKILL.md skillA
harness-door-pattern from gaia-research/gaia-skill-heaven is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gaia-research/gaia-skill-heaven/harness-door-pattern@git:20261105.bfcefe9Pins git:20261105.bfcefe9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gaia-research/gaia-skill-heaven
- Path
packages/core/skills/harness-door-pattern/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261105.bfcefe9, committed Nov 5, 2026
- First version recorded
- Aug 8, 2026
- Size
- 9,885 bytes
- Repository stars
- 4
- License
- MIT
Build a Skill Heaven door for a new AI coding harness. Use when adding support for any harness (claude, pi, codex, hermes, grok, or a new one) — covers the four suppression-mechanism classes, how to probe without being lied to, the door package shape, and the traps that have already cost time.
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
# The Harness Door Pattern A **door** boots a harness into a chosen posture. Five have been built. The work is the same shape every time, and most of the cost is in the probe, not the code. This skill exists so door six is cheap. --- ## The core insight **Every harness hides its skills somewhere different, but there are only about four places.** Identify which class you are dealing with and you have most of the answer. Guess wrong and you will burn a probe campaign proving a flag does nothing. ### Class 1 — Allowlist flags that read like suppression flags The flag takes a list of scopes to **load**. Naming a scope *keeps it alive*. The instinct to "name the thing you want to suppress" is exactly backwards, and it looks correct in a diff. | harness | flag | the trap | |---|---|---| | claude | `--setting-sources` | naming `project` **keeps** project-scope skills. Empty string is the suppression. | | hermes | `--toolsets` | naming a set that omits `skills` is what drops the skill index. | This class has bitten twice in this repo — KC4 on `curated`, then P8 on `product-floor` (#24), which shipped with the same defect for a month because the fix was applied to one posture and …
Read the whole file at its exact version.
How to install
mdr add gaia-research/gaia-skill-heaven/harness-door-pattern@sha256:4c3fe75fff853a44The line at the top of this page pins the label git:20261105.bfcefe9, 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_6fhuzkgpxqbhpozr)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Aug 8, 2026 and Nov 5, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261105.bfcefe9 latest | 2026-11-05 | bfcefe9 | 9,885 B | A | view · diff |
| git:20260819.c6b9b72 | 2026-08-19 | c6b9b72 | 9,610 B | A | view · diff |
| git:20260810.ae24947 | 2026-08-10 | ae24947 | 9,563 B | A | view · diff |
| git:20260808.44f0e9d | 2026-08-08 | 44f0e9d | 9,573 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 (9885 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
gaia-research/gaia-skill-heaven · 4 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6fhuzkgpxqbhpozr GET https://markdownregistry.com/api/v1/resolve?ref=gaia-research/gaia-skill-heaven/harness-door-pattern GET https://markdownregistry.com/api/v1/blob/4c3fe75fff853a44001737effb20eb26046e16f5bdd72105abd1a85c2e0bb6f5
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.