principle-model-the-domain from theonlyfusioncube/potetos-for-everyone is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
Encode the domain in the right structure: state machine, typed model, table, registry, reducer, boundary, or collection instead of scattered conditionals. Use when when stateful logic accumulates branches or repeated shape assumptions.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Model the Domain
## Trigger
When stateful logic accumulates branches or repeated shape assumptions.
## Rule
Encode the domain in the right structure: state machine, typed model, table, registry, reducer, boundary, or collection instead of scattered conditionals.
## Application
1. Name the concrete decision this principle changes.
2. Apply the rule to that decision, not as a decorative citation.
3. Prefer evidence from the current repository/runtime over generic preference.
4. If the principle conflicts with an explicit user constraint, keep the constraint and state the tradeoff.
The line at the top of this page pins the label git:20260908.ec65ed5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_dgzve6qan3uy7loy
GET https://markdownregistry.com/api/v1/resolve?ref=theonlyfusioncube/potetos-for-everyone/principle-model-the-domain
GET https://markdownregistry.com/api/v1/blob/e543e0f8885dae1c6aefb43ac351454a5ddb78a7397fa7b44f808906ecbf96ec
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
theonlyfusioncube/potetos-for-everyone · automations/benny/skills/reproduce-and-fix-issues/SKILL.md · Reproduce a confirmed issue on the closest real surface, find root cause, and optionally prepare a minimal draft fix…
theonlyfusioncube/potetos-for-everyone · automations/benny/skills/triage-issue-reports/SKILL.md · Triage incoming software issue reports using available repository and runtime evidence, without editing code. Use for…
theonlyfusioncube/potetos-for-everyone · skills/architect/SKILL.md · Settle data shapes, ownership, boundaries, and interfaces before code crosses a function/module boundary. Use for…
theonlyfusioncube/potetos-for-everyone · skills/arena/SKILL.md · Spawn parallel candidate implementations for the same task, cross-judge, and graft the best parts into the winning…
theonlyfusioncube/potetos-for-everyone · skills/automate-me/SKILL.md · Create a personal mode skill from recurring workflow patterns in available history. Use when the user wants their own…
theonlyfusioncube/potetos-for-everyone · skills/benchmark-checklist/SKILL.md · Vet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened)…
theonlyfusioncube/potetos-for-everyone · skills/blast-radius/SKILL.md · Prove what a small-looking change can affect before or after editing. Use for compatibility, caller, state, schema, or…
theonlyfusioncube/potetos-for-everyone · skills/bro/SKILL.md · Restate the last technical explanation in plain human language with minimal jargon. Use when the user asks for a…
theonlyfusioncube/potetos-for-everyone · skills/correct/SKILL.md · Find the mistakes agents keep repeating in this repo and make each one impossible. Try architecture first, then types…
theonlyfusioncube/potetos-for-everyone · skills/create-formal-verification-skill/SKILL.md · Generate a project-local skill that formally verifies the code where a bug costs the most and tests reach the least, in…
theonlyfusioncube/potetos-for-everyone · skills/create-verification-skill/SKILL.md · Generate a project-local verification skill that drives the real app and captures evidence. Use when setting up…
cursor/plugins · harness/pstack/claude-code/skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.
cursor/plugins · pstack/skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.
nightly-labs/openbot · marketplace/production-catalog/bundles/pstack/skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.
michael-denyer/pstack-claude · plugins/pstack/skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.
backnotprop/pstack · skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files.
iap/pstack-hermes · skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files. Encode the…
j-star-films-studios/vibecode-protocol-suite · assets/.agent/skills/engineering-principles/model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files. Encode the…
barbieri/local-openfinance · .agents/skills/principle-model-the-domain/SKILL.md · Apply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files. Encode the…
