feat(linter): add .oxlintrc.jsonc config file support#19870
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camc314 merged 11 commits intooxc-project:mainfrom Mar 3, 2026
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feat(linter): add .oxlintrc.jsonc config file support#19870camc314 merged 11 commits intooxc-project:mainfrom
camc314 merged 11 commits intooxc-project:mainfrom
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Teach the config discovery layer to recognize `.oxlintrc.jsonc` alongside `.oxlintrc.json`. The JSONC parsing already works via `json_strip_comments`, so this is purely a filename discovery change. - Add `DEFAULT_JSONC_OXLINTRC_NAME` constant - Update `find_configs_in_directory`, `to_discovered_config`, `try_load_config_from_dir`, and `load_many` to handle `.jsonc` - Prefer `.json` over `.jsonc` when both exist (matches oxfmt behavior) - Add `.oxlintrc.jsonc` to LSP file watch patterns - Update CLI help text, error messages, and diagnostic notes - Add unit tests for JSONC discovery and `.json` preference Closes oxc-project#19729
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# Oxlint ### 🚀 Features - e6b604f oxlint: Auto-enable gitlab formatter on GitLab (#20076) (camc314) - 2488a68 linter: Add .oxlintrc.jsonc config file support (#19870) (Scott S.) - 61bf388 linter: Add `options.reportUnusedDisableDirectives` to config file (#19799) (Peter Wagenet) - c92422b oxlint: Auto-enable github formatter on GitHub Actions (#19944) (Boshen) - 0337c6d linter: Implement typescript/no-unecessary-type-conversion (#19955) (camc314) - 2919313 linter: Introduce denyWarnings config options (#19926) (camc314) - a607119 linter: Introduce maxWarnings config option (#19777) (camc314) ### 🐛 Bug Fixes - 0861d9a linter/plugins: Remove getters from `Context` (#20115) (overlookmotel) - 92cfb14 linter/plugins: Fix types for `walkProgram` and `walkProgramWithCfg` (#20081) (overlookmotel) - 10e211f oxlint/lsp: Send other code actions besides `source.fixAll` if requested (#20042) (Sysix) - 602daaa linter/plugins: Fix type definition for `VisitorObject` (#20065) (overlookmotel) - ee0491e apps,napi: Explicitly specify libs in tsconfigs (#20071) (camc314) - b6e9499 linter: Fix the logic for `unicorn/prefer-dom-node-remove` to handle literal callees as well as arguments. (#20059) (connorshea) - 3874ae1 linter: Update `unicorn/prefer-query-selector` to also catch `getElementsByName()`. (#20060) (connorshea) - 77c93fb linter: Handle array-type shorthand inside union members (#20034) (camc314) - 50eb160 linter/no-unused-vars: Allow unused type params in ambient module blocks (#19615) (Don Isaac) - 1dd0d21 linter/no-restricted-imports: Apply regex pattern checks to side-effect imports (#20028) (camc314) - 7f3d735 linter: Error when --type-check is used without --type-aware (#20025) (camc314) - eea201c unicorn/prefer-string-slice: Avoid unsafe autofix for substr-to-slice (#20010) (camc314) - 50359dc oxlint/lsp: Detect `reportUnusedDisableDirectives` from oxlint config, change lsp `unusedDisableDirectives` default value to `None` (#20011) (Sysix) - 4bc84b1 linter/plugins: Allow `null` and `undefined` for `rule.meta.fixable` (#20008) (overlookmotel) - 753e27e linter/role-supports-aria-props: Add `aria-posinset` to supported `option` ARIA properties (#20003) (JongKyung Lee) - f57b2c9 linter/plugins: Fix return types of tokens methods (#19985) (overlookmotel) - 27ee4fc linter/no-loss-of-precision: Avoid double rounding for negative exponents (#19999) (camc314) - 77a94bb linter: Avoid no-loss-of-precision false positive for 3e-308 (#19992) (camc314) - 6245c56 linter/no-unused-private-class-members: Treat logical lhs access as usage (#19991) (camc314) - 65891e3 linter: Avoid prefer-const false positive for mixed-scope destructuring (#19982) (camc314) - 89991fe linter: Avoid prefer-const false positive for operator reassignments (#19975) (camc314) - 87318e7 oxlint/lsp: Load js config with reforcing fs read (#19551) (Sysix) - d40a942 linter/no-useless-constructor: Mark fixer as suggestion (#19961) (camc314) - ccbd959 linter/prefer-code-point: Report String.fromCharCode member references (#19931) (camc314) - 14fbbfc linter: Add help text to oxc/no-rest-spread-properties rule (#19900) (Subin Kim) ### ⚡ Performance - 2baa5fb napi: Unify build-test profile to coverage for cache sharing (#20090) (Boshen) - 77f1c71 linter/plugins: Make tokens class instances (#19980) (overlookmotel) - 758b424 linter/plugins: Reduce memory copies for tokens (#19979) (overlookmotel) - 236847f linter/plugins: Cache token objects (#19978) (overlookmotel) - 94b597a linter/plugins: Store tokens as a `Box<[Token]>` (#19969) (overlookmotel) ### 📚 Documentation - 2c0010a linter/plugins: Move comment about "bivariance hack" into generated code (#20082) (overlookmotel) - 7538f09 linter: Improve `import/extensions` and `import/no-named-as-default` rule docs. (#20053) (connorshea) - 1f909cf linter: Improve docs for `unicorn/require-post-message-target-origin` rule. (#20061) (connorshea) - 12ae35c oxlint/lsp: Remove outdated ToDo for `LintOptions.run` (#20012) (Sysix) - 3be73e6 linter/plugins: Fix JSDoc comments for tokens methods (#20004) (overlookmotel) - 48ef285 linter: Update `--config` docs (#19965) (camc314) - 6ea49a0 linter: Fix some identation issues for the generated types used in `oxlint.config.ts`. (#19942) (connorshea) - 6c0e0b5 linter: Add oxlint.config.ts to the config docs. (#19941) (connorshea) - 160e423 linter: Add a note that the typeAware and typeCheck options require oxlint-tsgolint (#19940) (connorshea) - d54c275 linter: Improve rule docs for 27 unicorn rules (#19903) (connorshea) # Oxfmt ### 🚀 Features - ee26215 oxfmt: Support css-in-js substitution (#20019) (leaysgur) - 0f0ff51 oxfmt: Display default settings was used message in cli stats (#19939) (leaysgur) - 88815b8 oxfmt: Reintroduce stats line for write mode (#19938) (leaysgur) ### 🐛 Bug Fixes - ee0491e apps,napi: Explicitly specify libs in tsconfigs (#20071) (camc314) - 92f4490 oxfmt: Apply `is_ignored_dir` for glob paths too (#20056) (leaysgur) - 114f974 oxfmt/lsp: Prefer language_id over file extension when formatting (#19977) (copilot-swe-agent) ### ⚡ Performance - 2baa5fb napi: Unify build-test profile to coverage for cache sharing (#20090) (Boshen) Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
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Summary
.oxlintrc.jsoncalongside.oxlintrc.jsonjson_strip_comments::strip()inOxlintrc::from_file(), so this is purely a filename discovery change.jsonover.jsoncwhen both exist in the same directory (matches oxfmt behavior).oxlintrc.jsoncto LSP file watch patterns.jsoncChanges
apps/oxlint/src/lib.rsDEFAULT_JSONC_OXLINTRC_NAMEconstantapps/oxlint/src/config_loader.rsfind_configs_in_directory,to_discovered_config,try_load_config_from_dir,load_many) + add testsapps/oxlint/src/lsp/server_linter.rs.jsoncto watch patterns and extended path filter + update testsapps/oxlint/src/command/lint.rsapps/oxlint/src/lint.rsTest plan
cargo check -p oxlint— compiles cleanlycargo test -p oxlint -- test_jsonc_config_discovery— new test:.oxlintrc.jsoncis discovered and loadedcargo test -p oxlint -- test_json_preferred_over_jsonc— new test:.jsonpreferred when both existcargo test -p oxlint -- test_watchers— all 10 watcher tests pass with updated pattern countsCloses #19729