Free, MIT-licensed AI skills, rules, and agent guidance for building event-sourced and CQRS applications with the Cratis ecosystem (preview).
This repository also configures its own agents. See what AI tells them →
Skill Claude CodeCodex
Inspect or operate a running Chronicle server with the cratis CLI - list failed partitions, read why an observer is stuck, replay a partition, browse events, event types, read models, projections and jobs. Use when a question is about the state of a live store rather than the source code, when a projection will not…
Skill Claude CodeCodex
Isolate tenants in a Cratis application with Chronicle namespaces — Arc maps the current tenant to a namespace (TenantNamespaceResolver), and each namespace has its own events, projections, reducers, and read models. Every Cratis application is assumed multi-tenant, so use this when setting up tenancy, when writing…
Skill Claude CodeCodex
Use this skill when asked to implement a new feature, command, query, slice, or screen in a Cratis-based project. Guides the full end-to-end workflow: C# backend → Debug+Release build → specs → React frontend → quality gates.
Skill Claude CodeCodex
Practical guidance for debugging and exploring Cratis Arc observable queries with cURL or other plain HTTP clients. Use this whenever the user mentions observable queries together with cURL, curl, HTTP GET debugging, waiting for the first payload, Server-Sent Events, SSE, streaming JSON, or long polling. Also use it…
Skill Claude CodeCodex needs its repo
Use this skill to visually QA rendered Cratis docs pages after changes under Documentation/ — screenshot headless in light AND dark, check diagrams/tables/code blocks render, and diagnose layout-shift ("flicker"/"jump"/"pop") bugs. Trigger on screenshot the docs, check how a page looks, review the docs visually…
Skill Claude CodeCodex
Add server-side paging and sorting to a Cratis read-model query — return IQueryable for one-shot paging, ISubject > for observable + paged results, and consume them from React with useWithPaging. Use when a list query can grow large enough that returning all rows is wasteful, or needs server-side sorting.
Skill Claude CodeCodex
Use this skill when asked to review, check, or validate code in a Cratis-based project. Produces a structured review report with blocking issues and suggestions, checked against all project architecture and style standards.
Skill Claude CodeCodex
Use this skill when asked to check for performance issues, inefficiencies, or scalability problems in a Cratis-based project. Covers Chronicle projections, MongoDB query patterns, .NET allocations, and React render overhead.
Skill Claude CodeCodex
Use this skill when asked to perform a security review or security audit of code in a Cratis-based project. Checks for injection, auth/authz, data exposure, secrets, and event-sourcing-specific vulnerabilities.
Skill Claude CodeCodex
Use this skill when asked to create a new feature, section, or page that does not yet exist in a Cratis-based project. Sets up the folder, composition page, routing, and navigation entry before any slices are added.
Skill Claude CodeCodex needs its repo
Ship staged or unstaged local changes: create a branch, make logical commits, push to origin, open a PR with the correct description and label, merge it, prepare no-effect dispositions for related issues, and delete the branch locally and on origin. Use whenever the user asks to commit, push, create a PR, ship, or…
Skill Claude CodeCodex needs its repo
Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, update or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.
Skill Claude CodeCodex needs its repo
Step-by-step guidance for building a multi-step wizard dialog (StepperCommandDialog) in a Cratis Arc application. Use whenever a command requires gathering information across multiple steps, implementing a wizard flow, breaking a complex form into named stages, or using StepperCommandDialog, StepperPanel…
Skill Claude CodeCodex
Use this skill when asked to add or build a canvas-style icon toolbar using the @cratis/components Toolbar component. Covers Toolbar, ToolbarButton, ToolbarSeparator, ToolbarSection, ToolbarContext, and ToolbarFanOutItem. Use whenever building tool panels, drawing tool selectors, zoom controls, or any icon-button…
Skill Claude CodeCodex
Diátaxis classification and authoring guidance for Cratis docs — decide whether a page is a Tutorial, How-to, Reference, or Explanation and draft its content in that style. For WHERE a new page goes + sidebar wiring use add-cratis-docs-page; to change an existing page use edit-cratis-docs.
Skill Claude CodeCodex
Use this skill when asked to write tests or specs for event appending, event log behavior, constraint violations, or concurrency violations using EventScenario in a Cratis-based project. Produces infrastructure-free in-process specs using EventScenario and AppendResult Should extensions.
Skill Claude CodeCodex needs its repo
Use this skill to write specs for the React/TypeScript surface of a Cratis APPLICATION slice — view models, helpers, and component behavior (Vitest + Mocha-style describe/it + Sinon + Chai .should). The frontend peer to write-specs (backend). For framework @cratis/ package specs use cratis-specs-typescript instead.
Skill Claude CodeCodex
Use this skill when asked to write tests or specs for read model projections, reducers, or model-bound projections using ReadModelScenario in a Cratis-based project. Produces infrastructure-free in-process specs using ReadModelScenario .
Skill Claude CodeCodex
Use this skill to write specs for an event-sourced Cratis APPLICATION slice (command, query, projection, reactor, constraint) using the in-process scenario family (CommandScenario / EventScenario / ReadModelScenario / ReactorScenario); out-of-process Chronicle integration is an advanced fallback. NOT for…
Skill Claude CodeCodex
Run the private Studio repository's local release preparation workflow. Use only inside this repository after reading its project context.
Skill Claude CodeCodex
Place and wire a new Cratis documentation page after its product, audience, document type, and authoritative source are known. Use when the page does not exist; route existing-page edits, content drafting, and visual QA to their focused companion workflows.
Skill Claude CodeCodex
Draft accurate Cratis documentation content after the owning repository, page placement, document type, and authoritative product sources are known. Use for tutorials, how-to guides, explanations, and references; defer placement, existing-page discovery, and visual QA to their companion workflows.
Skill Claude CodeCodex
Locate and change the authoritative source of an existing Cratis documentation page, then sync and verify it. Use for corrections, rewording, broken links, and outdated examples; route new pages, fresh content design, and visual QA to their focused companion workflows.
Skill Claude CodeCodex
Classify and interpret Chronicle MCP inspection requests without invoking tools. Use whenever a user asks to inspect a running Chronicle store through MCP, choose an MCP capability, assess whether an MCP action is observational, or interpret already-provided redacted MCP output. This skill is classification-only until…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: