What is cratis-screenplay-command-surface?

A guide to the write side of a Cratis Screenplay model. It covers commands that express intent, events that record changes, and the rules, data types, policies, and concurrency limits around them.

Use it to declare or change commands, event shapes, validation and authorization rules, handlers, and related domain concepts.

It helps keep business rules and state changes explicit instead of scattering them across undocumented code.

cratis-screenplay-command-surface

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add Cratis/AI --skill cratis-screenplay-command-surface

Clone the repo

git clone --depth 1 https://github.com/Cratis/AI

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cratis/ai/cratis-screenplay-command-surface/github.svg)](https://agentmods.dev/skills/cratis/ai/cratis-screenplay-command-surface)

Your own site

<a href="https://agentmods.dev/skills/cratis/ai/cratis-screenplay-command-surface"><img src="https://agentmods.dev/badge/skills/cratis/ai/cratis-screenplay-command-surface/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cratis/ai/cratis-screenplay-command-surface"><img src="https://agentmods.dev/badge/skills/cratis/ai/cratis-screenplay-command-surface.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 126 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,305 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00126	$0.04305
Opus 5.5	$0.00050	$0.01722
Sonnet 5.5	$0.00025	$0.00861
Haiku 4.5	$0.00013	$0.00430

Measured 2d ago against content hash c394a201086b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cratis-screenplay-command-surface scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cratis/ai/skills/cratis-screenplay-command-surface/SKILL.md · 325 lines

How it starts

The opening of the file, as written. The whole thing — 325 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The Screenplay write surface

Read preferred syntax when writing or reviewing .play.

Everything that changes the system: the command that expresses intent, the event it appends, the rules that can refuse it, and the strongly-typed values they are all built from.

Locate the model

Look first for the project's existing .play files: their folder is the model. For a new model, check Source/ or src/, else use Screenplay/ at the repository root. Never put a model under .cratis/ or hand-copy it between repositories. cratis ai install manages .cratis/ai/, never model files. Keep explanatory Markdown in project documentation; .play is the single flow model.

Product sources

Tool versions: toolchain SKILL.md; sources below. Compilation is not execution.

Examples and executable boundaries; inline events, repairs, canonical optional.
handler, code attachments, persona and compliance binding (Semantics/SemanticModelBinder*.cs, Diagnostics/DiagnosticCodes.cs).
Generated-value and response rules (ESM v7).
Identity and compliance syntax (identity.md, context.md, concepts.md, purposes.md, events.md, diagnostics.md); v13 compliance admission: references/compliance.md.
v15 generation strategies, strict fixtures and freshness; Stage realization: references/generated-values-and-responses.md; shop: references/shop-generation.md.

"Parses" and "runs" are different claims. The executable profile, and what each construct binds to, is in the cratis-screenplay-model-authoring language reference.

`concept` and `type`

concept InvoiceId : Uuid
concept DiscountPercentage : Decimal
  validate
    >= 0    message "A discount cannot be negative"
    <= 100  message "A discount cannot exceed 100 percent"
concept PersonName : String pii
  pii reason "Identifies the billing contact."
concept InvoiceStatus : Enum
  draft
  sent
  paid

Primitives: Uuid, String, Int, Decimal, Bool, Date, DateTime. Enum is a separate concept kind; details: references/enum-numbers.md. Use bare pii (personal alias) and secret on concepts; Compliance is inherited. Keep protection even when a compiler or renderer refuses it. Read compliance and purposes for ESM v13, binder-only refusals, consumer ceilings, marker repairs, reasons, scopes and provider limits.

Read the full file on GitHub · 325 lines

Files

What ships with it

18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2d ago Changed c394a201086b
3d ago Changed · +3 lines 1b8af5ffbc38
4d ago Changed · +14 lines 2829398d8f33
7d ago Changed · -87 lines 78136a037c38
8d ago Changed · -5 lines 5d8c27505d04
9d ago Changed 47d37d1cc121
10d ago Changed · +13 lines 65b4c15a7f69
12d ago Changed · -151 lines 52ef45e554a3
14d ago Changed · +78 lines 4891caa70cc4
17d ago First seen · 460 lines · 126 tokens per session scan A 86adbaae0bfc

Subscribe to this mod's changes

cratis-screenplay-command-surface is a skill published in the GitHub repository Cratis/AI (4 stars, last pushed yesterday), licensed MIT. It adds 126 tokens to every session and 4,305 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-19.

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