Milestone 2 (#14826) is now complete.

• Pretty much the whole of ESLint's plugin API surface is supported by Oxlint.
• Conformance tests show very high pass rate (99.5%+ on popular plugins).

Next milestone has multiple areas of focus:

1. Support framework plugins (Vue, Svelte etc)
2. Fill in small gaps in API
3. Fix out-of-memory errors on Windows
4. Improve performance
5. Fix TS types
6. Fix small bugs/oddities

Framework plugins

We should now support linting JS/TS sections of multi-part files, but there are no tests. We need to add some.

Supporting custom template syntax (Vue, Svelte etc) is more difficult. First step is to research and scope out what's required.

• Add tests for linting JS/TS sections of multi-part files
• Support custom template syntax

API gaps

• context.languageOptions.parser Linter plugins: Support languageOptions.parser #20373
• Add new options to RuleTester Linter plugins: Add new options to RuleTester #19916
• RuleTester check output validity Linter plugins: RuleTester check output is valid after applying fixes/suggestions #19917

Fix Windows OOM

We have problems with memory exhaustion on Windows in some cases due to the large allocations required by raw transfer. We have mitigated it, but not managed to completely remove the problem.

See #19395 and #19480.

Fixing this will require overhauling our arena allocator.

Performance

• Rustify scopes
• Use lazy deserialization for tokens
• Improve perf of globals Linter plugins: Improve perf of passing globals to JS plugins #16359
• Address various TODO comments in JS-side code

TS types

We should improve our TS type defs, so they work for plugins written in TS. They are mostly correct, but some oddities remain.

• Fill out TS type defs for Plugin. Some properties are likely missing.
• Fill out TS type defs for Rule. Some properties are likely missing.
• Fix visitor object type linter: JS Plugins types for custom rules with createRule() seem incorrect #18154
• Any other fixes
• More type tests

Small bugs/oddities

• Refactor how plugins + rules are stored in configs on Rust side Linter plugins: Various changes #12437