Add Scala tooling to Claude Code workflow

.github/workflows/claude.yml

@@ -17,34 +17,32 @@ jobs:
       (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
       (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
       (github.event_name == 'issues' && (contains(github.event.issue.body, '@claude') || contains(github.event.issue.title, '@claude')))
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       contents: read
       pull-requests: read
       issues: read
       id-token: write
-      actions: read # Required for Claude to read CI results on PRs
+      actions: read
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
           fetch-depth: 1
 
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+          cache: 'sbt'
+
+      - name: Set up sbt
+        uses: sbt/setup-sbt@3e125ece5c3e5248e18da9ed8d2cce3d335ec8dd # v1, specifically v1.1.14
+
       - name: Run Claude Code
         id: claude
         uses: anthropics/claude-code-action@v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-
-          # This is an optional setting that allows Claude to read CI results on PRs
-          additional_permissions: |
-            actions: read
-
-          # Optional: Give a custom prompt to Claude. If this is not specified, Claude will perform the instructions specified in the comment that tagged it.
-          # prompt: 'Update the pull request description to include a summary of changes.'
-
-          # Optional: Add claude_args to customize behavior and configuration
-          # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
-          # or https://code.claude.com/docs/en/cli-reference for available options
-          # claude_args: '--allowed-tools Bash(gh pr:*)'
-
+          timeout_minutes: 60

CLAUDE.md

@@ -0,0 +1,24 @@
+# sttp - Scala HTTP client
+
+## Build commands
+- Compile all: `sbt compile`
+- Compile specific Scala version/platform: `sbt "compileScoped 3 JVM"` (options: 2.12, 2.13, 3 / JVM, JS, Native)
+- Test all: `sbt test`
+- Test specific: `sbt "testScoped 3 JVM"`
+- Compile docs: `sbt compileDocs`
+
+## Project structure
+- Multi-module sbt project using ProjectMatrix for cross-compilation
+- Scala versions: 2.12, 2.13, 3
+- Platforms: JVM, JS, Native
+- Core module in `core/`, backends in dedicated directories (e.g., `okhttp-backend/`, `http4s-backend/`)
+- JSON support modules in `json/`
+- Effects modules in `effects/` (cats, zio, fs2, monix, ox)
+
+## Testing
+- Tests require a test server running (started automatically via `testServerSettings`)
+- Use `sbt "testScoped <version> <platform>"` for targeted testing
+
+## Code style
+- Follow existing patterns in the codebase
+- Use `%%%` for cross-platform dependencies, `%%` for JVM-only