cratis-stage-rendering-and-sandbox SKILL.md skillA
cratis-stage-rendering-and-sandbox from cratis/ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cratis/ai/cratis-stage-rendering-and-sandbox@git:20261017.620d528Pins git:20261017.620d528 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cratis/ai
- Path
.cratis/ai/skills/cratis-stage-rendering-and-sandbox/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261017.620d528, committed Oct 17, 2026
- First version recorded
- Oct 17, 2026
- Size
- 16,940 bytes
- Repository stars
- 4
- License
- MIT
What Cratis Stage and `cratis render` do with a Screenplay `.play` model: the model shape Stage admits and refuses (`STAGE-ESM-*`, `PLAY0268` render refusals), what it emits (C# Arc/Chronicle backend, React/Vite scaffold with Arc `CommandForm` shell emission over Scene typed bindings, Debug specifications), managed publication, `--force`, recovery, scoped renders (`--scope`) and `--check`, authored-UI omission/parity checks, the unmanaged `Customizations/` seam, and the `cratis/stage` sandbox…
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
# What Stage renders, and what it refuses Stage turns a Screenplay `.play` model into a Cratis Arc + Chronicle application. It ships a **renderer** (a .NET library, driven from a terminal by `cratis render`), a disposable **sandbox** container (`cratis/stage`, started by `cratis run`) and a **specification runner** container (`cratis/stage-specrunner`). A model Stage cannot render exactly produces **no artifacts**, never thinner ones. Probe the model; admission rules are not a render result. Requires cratis CLI ≥ 3.57 (`cratis --version`) to render ESM v14 and v15 models; an older CLI refuses newer ESM versions with `CLI-RENDER-004` (or `STAGE-ESM-016` from Stage directly). Requires Cratis CLI 3.74.0 to render ESM v21–v26 models and 3.75.0 for v27; CLI 3.66.0–3.73.0 refuse v21 and later with `CLI-RENDER-004`, and every CLI refuses v28 and later with it. Above the ceiling, a construct the bundled compiler cannot bind reports PLAY0268 before `CLI-RENDER-004` is reached. ## Batches, described handlers, text rules and protected reads Read [language admission](../cratis-screenplay-toolchain/references/language-admission.md) …
Read the whole file at its exact version.
How to install
mdr add cratis/ai/cratis-stage-rendering-and-sandbox@sha256:d612b19fc2181385The line at the top of this page pins the label git:20261017.620d528, 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_wlsg27wcaj7mpyfa)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, all committed on Oct 17, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261017.620d528 latest | 2026-10-17 | 620d528 | 16,940 B | A | view · diff |
| git:20261017.47972bd | 2026-10-17 | 47972bd | 18,680 B | A | view · diff |
| git:20261017.f65ceff | 2026-10-17 | f65ceff | 18,306 B | A | view · diff |
| git:20261017.b093239 | 2026-10-17 | b093239 | 18,294 B | A | view · diff |
| git:20261017.d3a5d1e | 2026-10-17 | d3a5d1e | 17,578 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 (16940 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
cratis/ai · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wlsg27wcaj7mpyfa GET https://markdownregistry.com/api/v1/resolve?ref=cratis/ai/cratis-stage-rendering-and-sandbox GET https://markdownregistry.com/api/v1/blob/d612b19fc21813858ded731abdeb33e209476b93f0f12b9fceea27293b823d56
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.