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Repository Guidelines
Scope & Inheritance
- This file contains backend-specific guidance only.
- Follow
../../AGENTS.mdfor shared monorepo workflow, PR, and security policy.
Project Structure & Module Organization
apps/opik-backend is the Java backend module in the Opik monorepo.
- Source:
apps/opik-backend/src/main/java - Tests:
apps/opik-backend/src/test/java - Resources:
apps/opik-backend/src/main/resources - Migrations/config:
apps/opik-backend/data-migrationsand local runtime scripts (scripts/) - Related modules in the repository:
apps/opik-frontend,apps/opik-documentation,sdks/*,tests_end_to_end,deployment
Build, Test, and Development Commands
See also ../../AGENTS.md#build-test-and-development-commands for full monorepo commands.
./opik.sh --build— launch full stack in Docker (full verification environment)../opik.sh --verify/./opik.sh --stop— health check and shutdown.scripts/dev-runner.sh --be-only-restart— local Java backend process mode with hot workflow.scripts/dev-runner.sh --be-only-start— start backend quickly without restart.scripts/dev-runner.sh --build-be— rebuild backend dependencies/artifacts only.scripts/dev-runner.sh --lint-be— run backend lint/format checks.scripts/dev-runner.sh --migrate— run DB migrations (MySQL + ClickHouse).cd apps/opik-backend && mvn test— unit/integration tests (includes testcontainers-backed suites).cd apps/opik-backend && mvn spotless:apply— apply Java formatting.
Coding Style & Naming Conventions
- Backend follows a layered design: resource → service → DAO.
- Use constructor DI (
@Inject) and existing Guice modules; keep layer boundaries intact. - Java style follows Spotless defaults (format only changed files, avoid blanket reformatting).
- Use clear names, camelCase for methods/variables, PascalCase for classes.
- Prefer immutable collections (
List.of,Set.of,Map.of) and logging with quoted values in structured logs.
Testing Guidelines
- Frameworks: JUnit, Mockito, and Testcontainers under Maven test lifecycle.
- Test naming:
*Test.javainsrc/test/java(use descriptive class names for integration boundaries). - Add/adjust tests for changed behavior before PR.
- For cross-stack changes, validate locally with the backend running and required services (MySQL, ClickHouse, Redis) available.
Agent Contribution Workflow
- This module is part of the Opik monorepo; follow the shared workflow in
../../AGENTS.md#agent-contribution-workflow. - Run backend format and test commands in this file before requesting review.
Commit & Pull Request Guidelines
- Follow shared commit/PR policy in
../../AGENTS.md. - Backend-specific convention: use
[OPIK-####] [BE]in commit/PR titles when applicable.
Security & Configuration Tips
- Follow shared security policy in
../../AGENTS.md. - Backend-specific check: run migrations and verify
/healthcheckafter major backend changes.