Use when deciding how to organise code in an AI-assisted codebase — whether to split or merge a file, where to draw module boundaries, how big a file should get, whether to separate logic from rendering/styles/data, whether to use barrel/index re-export files, or where types and test files should live. Triggers on "should I split this file", "this file is getting too big", "separate concerns", "where should this code live", "are barrel files worth it", "central types file or co-locate", "colocate tests or a tests folder", reviewing or refactoring file/module organisation, structuring a new component or feature, or any architecture decision where part of the audience is an AI coding agent. Apply this whenever someone is choosing how to lay code out across files and an LLM will be reading or editing it, even if they only say "refactor this" or "clean up the structure" without mentioning AI.
83
87%
Does it follow best practices?
Impact
82%
1.54xAverage score across 9 eval scenarios
Passed
No known issues
{
"context": "A pure presentational Avatar is copy-pasted into 12 components, defended as 'self-contained for the agent'. The criteria check whether the answer extracts the shared component, grounds it in the understood-in-isolation test, and rejects the self-containment argument for a reusable primitive.",
"type": "weighted_checklist",
"checklist": [
{
"name": "Recommends extracting shared Avatar",
"description": "Recommends extracting the shared Avatar component rather than keeping 12 inline copies",
"max_score": 8
},
{
"name": "Pure-presentation isolation test",
"description": "Grounds it in the pure-presentation / understood-in-isolation test (low external context to consume)",
"max_score": 6
},
{
"name": "Rejects keep-inline argument",
"description": "Rejects the 'keep inline for self-containment' argument as misapplied to a reusable primitive",
"max_score": 6
},
{
"name": "Frames as real abstraction",
"description": "Frames the shared component as a real abstraction (read at the call site without opening internals), not merely DRY",
"max_score": 6
}
]
}