Borrowing it
Nothing to install: this file belongs to Cratis/VerticalSlices. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Cratis/VerticalSlices/main/.ai/skills/create-event-model/SKILL.mdgit clone --depth 1 https://github.com/Cratis/VerticalSlicesWrote 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/verticalslices/create-event-model)<a href="https://agentmods.dev/skills/cratis/verticalslices/create-event-model"><img src="https://agentmods.dev/badge/skills/cratis/verticalslices/create-event-model/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.
<a href="https://agentmods.dev/skills/cratis/verticalslices/create-event-model"><img src="https://agentmods.dev/badge/skills/cratis/verticalslices/create-event-model.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00069 | $0.01435 |
| Opus 5.5 | $0.00028 | $0.00574 |
| Sonnet 5.5 | $0.00014 | $0.00287 |
| Haiku 4.5 | $0.00007 | $0.00144 |
Grade A, and why
create-event-model 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 1mo 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.
This is a copy
100% identical to create-event-model — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create Event Model Diagram
Use this skill when adding a module/feature, or when any slice within it is added, renamed, or removed — the EventModel.md for the affected area is updated in the same change. If the event vocabulary/stream boundaries aren't decided yet, use event-modeling first; this skill renders an already-chosen model.
Diagrams use Mermaid's native eventmodeling diagram type (v11.15+). The full grammar is at https://mermaid.js.org/syntax/eventmodeling.html; that page wins when in doubt.
What an event model is
It arranges a module's commands, events, read models, and automations on a left-to-right business-flow timeline — answering "what happens in this module, and in what order?" One file per module (or feature), in a fenced ```mermaid block, alongside the code: <Module>/EventModel.md; a system-overview at the source root shows only cross-module flows.
Mermaid eventmodeling cheat sheet
Frame prefix: tf (timeframe — auto-connects to the previous frame) · rf (resetframe — breaks the chain; start each independent flow with it). rf replaces tf; tf N rf Name is invalid.
Frame: <prefix> <number> <type> <EntityName>. Number is unique (order of declaration doesn't matter — frames position by reference). Type is one of:
| Type | Swimlane | Represents |
|---|---|---|
ui |
UI / Automation | the persona interacting (persona name only — not a screen name) |
pcr |
UI / Automation | a reactor / automation processor |
cmd |
Command / Read Model | a [Command] record |
rmo |
Command / Read Model | a [ReadModel] record |
evt |
Events | an [EventType] record — use the exact, self-describing C# name |
Multiple sources (->>): a read model or fan-in reactor fed by several frames references them by frame number: tf 10 rmo Profile ->> 03 ->> 06 ->> 09. Namespaces: a Module. prefix (tf 04 pcr Billing.CreateInvoice) creates a sub-swimlane — use it for cross-module entities and in the system overview. Comments: %% ── Section ── (don't use a frame as a section header).
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.
- 1mo ago First seen · 81 lines · 69 tokens per session scan A 620e9d13a8e2
create-event-model is a skill published in the GitHub repository Cratis/VerticalSlices (2 stars, last pushed 1mo ago), licensed MIT. It adds 69 tokens to every session and 1,435 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to create-event-model, differing in 4 lines, and is treated as a copy.
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