DRY rules

These rules detect duplicated knowledge and drift risk. They are experimental and unweighted.

These rules are planned. None of them is available in a release yet.

The refactoring these rules point toward is described in Martin Fowler's catalog entry Extract Function.

ID	Rule	Default	Concern
DRY001	Uniform try wrapping	off	advisory
DRY002	Over parameterized helper	off	advisory
DRY003	Symmetric boilerplate	off	advisory
DRY004	Manual dataclass projection	off	advisory

Rule details

DRY001 Uniform try wrapping

• Claim: risk
• Detection/default: Every method wrapped in an identical broad try/except
• Message template: {class} wraps {count} methods in the same broad exception structure, duplicating one failure policy.

DRY002 Over parameterized helper

• Claim: design
• Detection/default: Helper taking parameters never varied across call sites
• Message template: Helper {helper} accepts {parameters} even though every call site supplies the same values.

DRY003 Symmetric boilerplate

• Claim: design
• Detection/default: ≥3 near-identical methods differing only by a literal
• Message template: {scope} contains {count} near-identical methods whose only observed variation is {variation}.

DRY004 Manual dataclass projection

• Claim: design
• Detection/default: Dataclass is rebuilt as a dictionary with unchanged field names and values
• Message template: This dictionary manually copies every User field and can drift when the dataclass changes.