Stabilize Cargo's linting system

[tomassedovic]

Metadata
Point of contact	@epage
Team(s)	cargo, clippy, compiler
Goal document	2026/cargo-lints

Summary

Polish the unstable linting system in Cargo so users can get the benefit of the current and future lints for their workspace and packages.

Tasks and status

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Note: we have updated the body to match the 2026 goal. Your original text is preserved below.

Details

Metadata
Point of contact	@epage
Team(s)	cargo, clippy, compiler
Goal document	2026/cargo-lints

Summary

Polish the unstable linting system in Cargo so users can get the benefit of the current and future lints for their workspace and packages.

Tasks and status

[tomassedovic]

This issue is intended for status updates only.

For general questions or comments, please contact the owner(s) directly.

[epage]

Key developments

• Process for adding lints is simplifed
• Lint pass summary reports are now included
• cargo::default group is added

Blockers: none

Help wanted: can't think of anything

[epage]

Key developments

• docs(diag): Provide jumping off points for writing diagnostics and passes cargo#17090
• fix(diag): Give diagnostics the same display path behavior as rustc cargo#17101
• fix(install): Run cargo lints like rustc lints cargo#17107

Blockers: none

Help wanted: can't think of anything

[epage]

Key developments

• Requested a lint review by clippy and cargo teams
• feat(diag): Support build.warnings for cargo lints cargo#17112
• fix(diag): Remove sometimes-invalid removal suggestions  cargo#17139
• docs(lints): Reduce the superfluous whitespace by grouping bullet items cargo#17146
• docs(lints): Add a false-positive example solution cargo#17147
• docs(ref): Clarify MSRV for lints cargo#17184