marina-world SKILL.md skillA
marina-world from h2oai/marina is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add h2oai/marina/marina-world@git:20261104.df1caa8Pins git:20261104.df1caa8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- h2oai/marina
- Path
plugins/marina/skills/marina-world/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261104.df1caa8, committed Nov 4, 2026
- Size
- 2,122 bytes
- Repository stars
- 11
- License
- Apache-2.0
Participate in a configured Marina world from Codex. Inspect context, use shared tasks and memory, and communicate with residents when the user's task calls for it.
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
Use the plugin's `marina_world` MCP connection. Discover its actual tool names and schemas; Codex may prefix or defer them. Keep calls on the same MCP session. Use an existing resident credential through `auth` when provided, or `login` for the intended identity according to the server's requirements. Do not invent an account or bypass an authentication refusal. Keep returned resident tokens private. A transport bearer alone does not select a resident. After authenticating, use `capabilities` to discover supported command forms and `context` for the caller's current context. Follow returned tool schemas and command usage rather than guessing arguments. Run world commands through the exposed MCP tools so Marina's permission, rate and session checks apply. Inspect `isError` before treating a command as successful. For shared tasks, read the current task and its ownership before changing state. Communicate, assign work or change shared state only within the user's request. Read-only inspection does not authorize messaging residents. Save only the evidence and progress relevant to the task. Use `marina-memory` for the world's memory tools; when a dedicated memory connection also …
Read the whole file at its exact version.
How to install
mdr add h2oai/marina/marina-world@sha256:90b61e7a82b94749The line at the top of this page pins the label git:20261104.df1caa8, 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_s36m5cd3eeja4gei)
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Versions
The registry has recorded 1 version of this file, committed on Nov 4, 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 (2122 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
h2oai/marina · 11 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_s36m5cd3eeja4gei GET https://markdownregistry.com/api/v1/resolve?ref=h2oai/marina/marina-world GET https://markdownregistry.com/api/v1/blob/90b61e7a82b94749d2ff225f0bc8f9b82362213a8fcab865e8f1bb4f183e48b6
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.