Future: convention lint checks ported from assist (filename convention, import extensions)

[robdmoore]

Idea

assist ships custom lint checks for conventions that oxlint doesn't cover. We deliberately did not port these (our lint check is plain oxlint) — capturing them here as potential future built-ins.

What assist has

From staff0rd/assist:

• oxlint-rules/filenameConvention.ts — a custom oxlint rule enforcing that a file is named after its main export (e.g. updateWorkerCapacity.ts for updateWorkerCapacity).
• assist lint (src/commands/lint/lint/) — bespoke ts-morph checks for "conventions not enforced by oxlint":
  • checkFileNames.ts / runFileNameCheck.ts — the filename convention.
  • fixFileNameViolations.ts / renameExports.ts / applyMoves.ts — auto-fix: rename the file and rewrite all imports across the project.
  • runImportExtensionCheck.ts — check import extensions (e.g. require/forbid explicit .ts/.js).
  • createLintProject.ts — ts-morph project setup.

Possible built-ins for verifyx

• filename-convention — file name must match its primary export; with a fix mode that renames + updates imports.
• import-extensions — enforce a consistent import-extension policy.

Notes / design

• Would be native checks. We'd implement on the TypeScript compiler API (like our other native checks) rather than pulling in ts-morph as a dependency — though the rename-and-update-imports fix is exactly what ts-morph is good at, so that's a real dependency trade-off to weigh (a fix mode may justify ts-morph; a check-only mode probably doesn't).
• Fits the fix/check model: check mode reports; fix mode renames/rewrites (destructive — guard accordingly).
• filename-convention needs a config knob for the naming rule (kebab vs camel, index files, etc.).

Status

Parked. Not scheduled.