Replace tslint with ESLint

.agents/skills/verify-codepush/SKILL.md

@@ -20,7 +20,7 @@ This skill covers bare RN only. The Expo variants (`test:setup:expo:*`, `test:fa
    npm run setup          # npm install + build:ts -> lib/
    ```
    Run this again after every rebase or pull. Stale `node_modules` (for example an old TypeScript) makes `npm pack` fail in `build:ts` during `test:setup:*`, and the doctor does not detect it.
-   Mocha runs the `.mts` test sources directly (Node type-stripping), so tests need no build step. An edit to `test/*.mts` takes effect on the next run. `npm run typecheck:tests` (tslint + `tsc --noEmit`) is the only place type errors in `test/` get caught. The harness does not need the local `lib/`, because `npm pack` runs `prepare`, which builds `lib/` again.
+   Mocha runs the `.mts` test sources directly (Node type-stripping), so tests need no build step. An edit to `test/*.mts` takes effect on the next run. `npm run typecheck:tests` (`tsc --noEmit`) is the only place type errors in `test/` get caught. The harness does not need the local `lib/`, because `npm pack` runs `prepare`, which builds `lib/` again.
 
 2. **Provision the test app.** Run one of these commands:
    ```

.github/workflows/ci-test.yml

@@ -17,6 +17,7 @@ jobs:
 
       - name: Lint and type-check
         run: |
+          npm run lint
           npm run typecheck
           npm run typecheck:tests
 

.github/workflows/publish.yml

@@ -24,6 +24,7 @@ jobs:
 
       - name: Lint and type-check
         run: |
+          npm run lint
           npm run typecheck
           npm run typecheck:tests
 

.npmignore

@@ -110,4 +110,5 @@ CLAUDE.md
 AGENTS.md
 mise.toml
 tsconfig.json
+eslint.config.mjs
 babel.config.js

AGENTS.md

@@ -15,8 +15,11 @@ React Native CodePush is a native module that enables over-the-air updates for R
 
 Prefer unit testing what's possible (even though, on iOS, this involves a simulator). Legacy code used E2E tests for everything, which is complex, error-prone, and slow. The existing E2E tests are still useful, but this is not a pattern to follow.
 
+#### Lint
+- `npm run lint` (`lint:fix` to autofix)
+
 #### E2E Tests
-- `npm run typecheck:tests` - Lints and type-checks `test/`. Mocha runs the `.mts` test sources directly via Node's native TypeScript type-stripping, so this is the only place type errors in `test/` get caught.
+- `npm run typecheck:tests` - Type-checks `test/`. Mocha runs the `.mts` test sources directly via Node's native TypeScript type-stripping, so this is the only place type errors in `test/` get caught.
 
 Use the `verify-codepush` skill (`.agents/skills/verify-codepush/`) to run iOS and Android E2E tests and to prove a behavior end to end. It explains how the harness works, and how to drive and verify one CodePush behavior. Do not duplicate E2E details in this file.
 

eslint.config.mjs

@@ -0,0 +1,19 @@
+import bitrise from '@bitrise/eslint-plugin';
+
+// The ported upstream tests in src/**/__tests__ are not part of any tsconfig yet, see "Testing Notes" in AGENTS.md.
+const files = ['src/**/*.ts', 'test/**/*.mts'];
+const ignores = ['src/**/__tests__/**'];
+
+export default [
+  { ...bitrise.react, files, ignores },
+  {
+    files,
+    ignores,
+    rules: {
+      // tsc already reports undefined identifiers, and no-undef misreads Node/mocha globals and type namespaces.
+      'no-undef': 'off',
+      // React Native has no stdout, so console is the logging channel.
+      'no-console': 'off',
+    },
+  },
+];