run-marina SKILL.md skillA
run-marina 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/run-marina@git:20261030.ef35195Pins git:20261030.ef35195 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- h2oai/marina
- Path
.claude/skills/run-marina/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261030.ef35195, committed Oct 30, 2026
- Size
- 7,261 bytes
- Repository stars
- 11
- License
- Apache-2.0
Build, run, and drive the Marina server on an isolated port. Use when asked to start Marina, run a world command against a live instance, open or screenshot the dashboard, hit the dashboard API, smoke-test a change end to end, or run engine code in-process without a server.
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
Marina is a Bun server (WebSocket/HTTP on one port, MCP on +1, log viewer on +2) with a built React dashboard. Drive it through `.claude/skills/run-marina/driver.mjs`: it boots an **isolated** instance (port 3400, its own SQLite DB under `$TMPDIR/marina-run-3400`, no provider keys), runs world commands over the WebSocket, logs into the dashboard with headless Chromium (Playwright, no xvfb), screenshots it, and reads the dashboard REST API. All paths are relative to the repo root. ## Prerequisites Bun ≥ 1.4.4 (`.bun-version`; older Bun fails in ways that look like Marina bugs), Node (the driver runs under `node`), and the Playwright Chromium that `playwright-core` expects in `~/.cache/ms-playwright`. Check which build it wants: ```bash bun --version node node_modules/playwright-core/cli.js install --dry-run chromium ``` If the install location it names is empty, run the same command without `--dry-run` (it downloads Chrome for Testing into `~/.cache/ms-playwright`). ## Setup and build ```bash bun install # one root install covers every workspace member …
Read the whole file at its exact version.
How to install
mdr add h2oai/marina/run-marina@sha256:91b2cb99fc16c263The line at the top of this page pins the label git:20261030.ef35195, 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_jqcyb2csilbemiwk)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 30, 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 (7261 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_jqcyb2csilbemiwk GET https://markdownregistry.com/api/v1/resolve?ref=h2oai/marina/run-marina GET https://markdownregistry.com/api/v1/blob/91b2cb99fc16c26317dd1770c5eeb03e69231c0b0112ed5e766e707f1e207c8a
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.