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.
npx skills add Cratis/AI --skill cratis-screenplay-model-authoringgit clone --depth 1 https://github.com/Cratis/AIWrote 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.
[](https://agentmods.dev/skills/cratis/ai/cratis-screenplay-model-authoring)<a href="https://agentmods.dev/skills/cratis/ai/cratis-screenplay-model-authoring"><img src="https://agentmods.dev/badge/skills/cratis/ai/cratis-screenplay-model-authoring.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00103 | $0.02450 |
| Opus 5 | $0.00051 | $0.01225 |
| Sonnet 5 | $0.00021 | $0.00490 |
| Haiku 4.5 | $0.00010 | $0.00245 |
Grade A, and why
cratis-screenplay-model-authoring 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 232 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Author a Screenplay .play model
Screenplay is a declarative, indentation-based language that describes a whole event-sourced CQRS system in one document set: concepts, events, commands, queries, projections, screens and specifications. This repository owns the language and its compiler front end.
⚠️ Screenplay is experimental, and it is a front end. It parses, validates
and prints .play source, and binds a deliberately narrow subset to a versioned
executable semantic model. It does not generate, render or run an
application. Nothing in it emits C#, TypeScript or any target artifact — that
is Stage's job, and Stage admits less than Screenplay parses. Author against that
reality, not against the ecosystem diagram.
Verified product sources
| Package | Version | Purpose |
|---|---|---|
Cratis.Screenplay |
4.12.1 |
The compiler: parser, syntax tree, validator, diagnostics, printer, semantic model |
Cratis.Screenplay.Tool |
4.12.1 |
The screenplay dotnet tool |
Cratis.Screenplay.CanonicalCorpus |
4.12.1 |
The frozen RegisterProject conformance vector downstream tools verify against |
Behavior below is read from the repository at revision 7e2d91d. Reverify before
claiming another version behaves the same.
Verify a model
dotnet tool install -g Cratis.Screenplay.Tool
screenplay # or: screenplay path/to/model
The tool takes one positional argument — a directory or a single .play
file, defaulting to the current directory — plus --no-color and
--warnaserror. That is the entire surface: no verbs, no --help, no
--version, and no output or emit flag.
⚠️ It only verifies. It never writes anything. A tool invocation that appears to have "generated" something did not.
A directory is compiled as one application, recursively over **/*.play, so
a name declared in one file resolves from another. A single file is compiled
alone. Exit code is 1 when there is any error, or any warning under
--warnaserror; otherwise 0. Diagnostics print compiler-style with the
offending line and a caret:
What ships with it
1 file 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.
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.
- today First seen · 232 lines · 103 tokens per session scan A 3ef425bbea2d
cratis-screenplay-model-authoring is a skill published in the GitHub repository Cratis/AI (2 stars, last pushed today), licensed MIT. It adds 103 tokens to every session and 2,450 once invoked, about $0.0005 per session on Opus 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 2026-09-06.
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