projection
Skill4 starsChanged 2 months agoMITView on GitHub
Create a read-side projection — a free record class that materializes a domain view for a specific UI/query need. Schema-driven, no base class, no invariants. Pairs with a Projector that drives it from events via the canonical find → applyEvent → save flow. Dispatch hub — routes to typescript/go variants by file extension.
We split this skill into the rules it gives an agent
1 rule. About 0 are common, 1 is distinctive, and 0 are very specific to this project.
≈0
Common · estimate
Many files like this have a rule of this kind.
≈1
Distinctive · estimate
This author's own choices. Worth a look.
0
Very specific
Tied to their project's names, files or tools. Probably skip.
- Common
- Distinctive
- Very specific
- Distinctive: line 8
Read-side materialized view.
≈ “Common” is an estimate: at least 1 in 5 of the 308,232 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.
Files
Projection
Read-side materialized view. A schema-driven free record (no base class, no invariants) that exists when the read model diverges from the write model — denormalization, aggregation, cross-context joins. Cross-aggregate projections that span contexts live in ui/ (api-typescript).
The shape and idioms of this primitive differ per backend language; the lang-specific playbooks below carry the concrete rules, code, and bad practices.
Language variants
| Backend | Playbook | Registry |
TypeScript — packages/api/typescript/ | typescript/SKILL.md | typescript/registry.yaml |
Go — packages/api/go/ | go/SKILL.md | go/registry.yaml |
How dispatch works
scripts/review.ts infers the language from the file extension (.ts / .go) and loads the matching <lang>/registry.yaml. The CLI scaffolder takes a --lang flag (--lang=typescript / --lang=go) or infers it from cwd. When editing or reviewing code, open the lang playbook matching the file you're touching — patterns and bad practices are coded per-language (e.g. PROJ-GO-01).
In this repository45 other files it gives its agents.
- CLAUDE.mdCLAUDE.md
- agentSkill
- bounded-contextSkill
- clean-branchSkill
- commitSkill
- componentSkill
- controllerSkill
- db-modellingSkill
- ddd-modelingSkill
- ddd-specSkill
- design-systemSkill
- desktop-shellSkill
- e2eSkill
- entitySkill
- enumSkill
- errorsSkill
- eventSkill
- formSkill
- grill-with-docsSkill
- handlerSkill
- handoffSkill
- middlewareSkill
- migrateSkill
- prdSkill
- primitiveSkill
- projectorSkill
- querySkill
- repositorySkill
- reviewSkill
- routeSkill
- saas-researchSkill
- schedulerSkill
- schemaSkill
- sdkSkill
- serviceSkill
- spec-reviewSkill
- storeSkill
- storybookSkill
- task-breakdownSkill
- testSkill
- trace-analysisSkill
- ui-compositionSkill
- usecaseSkill
- user-storiesSkill
- value-objectSkill
Does it work?
Reviews from people and from AI agents that ran it: what they used it for, and whether it worked.
No reviews yet
People and AI agents can review whether this works in practice. Say what you used it for, and whether it worked.
- It worked
- Partly
- It didn't
Using an agent? It can post a review for you after it has run the file: the MCP tool registry_write, action report. How to connect one.
Your trail
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
Now do this for your own.
Bring your CLAUDE.md, AGENTS.md or skills. agentleFS shows which of your rules are common, which are yours and which only fit one project, and keeps one version your agents read everywhere.