iot-dc3/AGENTS.md

AGENTS.md

Shared engineering instructions for AI coding agents working in this repository.

This is the canonical project guidance file. Keep tool-specific files such as CLAUDE.md as thin compatibility pointers to this file so various AI coding assistants follow the same rules.

Project Snapshot

IoT DC3 is a distributed industrial IoT platform for device connectivity, data collection, metadata management, and gateway access. The project is built around Spring Boot services, gRPC contracts, RabbitMQ messaging, PostgreSQL persistence, and Docker/Podman Compose deployment.

Primary runtime layers:

• Gateway: HTTP entrypoint through Spring Cloud Gateway.
• Auth Center: tenant, token, user, role, resource, and API authorization.
• Manager Center: driver, device, point, profile, and metadata coordination.
• Data Center: point value ingestion, query, command dispatch, and data dashboards.
• Agentic Center: AI-assisted operations backed by OpenAI-compatible APIs.
• Drivers: protocol adapters for Modbus TCP, MQTT, OPC DA/UA, PLC S7, and virtual drivers.

Core stack:

• Java 21
• Maven 3.9+
• Spring Boot 4.0.6 / Spring Framework 7
• PostgreSQL, RabbitMQ, optional EMQX, optional Grafana/Elasticsearch stacks
• Spring gRPC with generated protobuf APIs
• Docker Compose or Podman Compose, wrapped by the root Makefile

Repository Map

• dc3-api/: protobuf and gRPC API contracts.
• dc3-common/: shared domain, business, facade, transport, persistence, configuration, and utility modules.
• dc3-center/: deployable center services.
• dc3-driver/: deployable device drivers.
• dc3-gateway/: HTTP gateway service.
• dc3/: compose files, runtime env files, scripts, and project docs.
• .mvn/settings.xml: local Maven mirror configuration used for mainland China development.
• Makefile: preferred command entrypoint for build, compose, hooks, and release helpers.

Command Rules

Prefer the root Makefile when a target exists. It keeps commands consistent across local machines and CI.

Common commands:

make dev-db
make dev-optional
make dev-all
make package
make changelog
make install-hooks

Direct Maven commands should use the checked-in settings file for local development:

mvn -s .mvn/settings.xml clean package
mvn -s .mvn/settings.xml -q -DskipTests compile

GitHub Actions should not need .mvn/settings.xml unless a workflow is intentionally testing the mainland-China mirror path. CI should prefer public Maven Central defaults.

Environment Files

• Root .env.example: template for Docker/Podman Compose interpolation.
• Root .env: local, untracked Compose interpolation file created from .env.example.
• dc3/env/dev.env: IDE-friendly local Java process variables without export.
• dc3/env/dev.env.sh: shell-friendly local Java process variables with export.

Do not treat these files as interchangeable. See dc3/doc/ENVIRONMENT.md before changing environment variables.

Compose Rules

The compose files under dc3/ are the canonical container definitions:

• docker-compose.yml
• docker-compose-dev.yml
• docker-compose-db.yml
• docker-compose-optional.yml
• docker-compose-grafana.yml
• docker-compose-elasticsearch.yml

Registry selection is controlled by environment variables and Make arguments, not by duplicated *-aliyun.yml files:

make dev REGISTRY=aliyun
make app-all REGISTRY=global
make compose-config STACK=grafana REGISTRY=cn

For container changes, run docker compose config --quiet or the corresponding make compose-config path for every touched compose file.

Architecture Rules

Tenant Safety

Tenant isolation is a hard requirement.

• New queries must preserve tenant scope.
• New gRPC requests must carry tenant IDs when the contract supports them.
• Cache keys for tenant-scoped data must include tenant context.
• Cross-service lookups must validate ownership before returning or mutating data.
• Do not add tenantId IS NULL shortcuts unless the data model explicitly defines global records.

Facade Boundaries

Use facade interfaces for cross-service calls from business code.

• Put contracts in dc3-common-facade-api.
• Put gRPC-backed implementations in dc3-common-facade-grpc.
• Put in-process implementations in dc3-common-facade-local.
• Keep controllers and service classes from binding directly to transport details unless they are transport adapters.

gRPC

Proto files live under dc3-api/*/src/main/protobuf.

When changing a gRPC contract:

1. Update the .proto file.
2. Regenerate by compiling the affected module or the full project.
3. Update server implementations and client builders/stubs together.
4. Preserve backward compatibility where practical.
5. Verify tenant propagation and error envelope behavior.

Server classes should be Spring beans extending generated *ImplBase classes. Client stubs should come from shared stub configuration instead of ad hoc channel construction.

Web API

• Controllers return the standard response envelope.
• Do not expose persistence entities directly.
• Use BO/VO/DTO separation and existing builder classes.
• Use grouped validation annotations consistently.
• Keep validation and exception messages in English.

Configuration

• Custom @ConfigurationProperties prefixes must use dc3.*.
• Prefer typed properties with validation over scattered @Value usage.
• Keep legacy aliases only when they protect existing deployments during migration.
• YAML should use ${ENV:default} placeholders for deploy-time values.
• Services built on dc3-common-web use WebFlux; configure request base paths with spring.webflux.base-path, not server.servlet.context-path.

Current custom prefixes:

• dc3.agentic
• dc3.driver
• dc3.driver.mqtt
• dc3.resource-registrar
• dc3.thread

Logging

Use the repository logging convention in dc3/doc/LOGGING.md.

• Use English, stable event names, and parameterized SLF4J placeholders.
• Prefer key-value fields such as tenantId={}, userId={}, deviceId={} over prose-only messages.
• Do not log secrets, tokens, passwords, full request bodies, or raw private payloads at info.
• Pass the exception object to warn/error logs for caught exceptions unless the stack trace is intentionally suppressed.

Driver Metadata

Driver application.yml files are user-facing metadata. Keep name, attribute-name, and remark values in English.

Driver code values are routing-critical and must remain stable after a driver is used in real deployments. Changing a driver code requires a migration plan for manager metadata and RabbitMQ routing.

Release Notes

dc3/doc/CHANGE.md is generated from git history. Do not hand-edit the current release block unless fixing generator output.

Use:

make changelog
make changelog FROM=<previous-tag-or-ref> TO=HEAD VERSION=<version>

Commit message quality directly affects release notes. Vague subjects such as update, fix, ., add comment, or non-English subjects make the generated changelog poor and should be rejected.

Generated changelog-only commits with subject docs(release): update generated changelog are skipped by default by the generator so rerunning make changelog after committing CHANGE.md remains stable.

Commit Rules

Use Conventional Commit subjects:

feat(agentic): add session cleanup policy
fix(manager): validate tenant scope for device queries
docs(env): explain JetBrains IDEA environment variables
refactor(container): deduplicate compose registry overrides

Required subject format:

<type>(optional-scope): <english imperative summary>

Allowed types:

• feat
• fix
• perf
• refactor
• docs
• build
• ci
• test
• chore
• style
• security
• revert

Rules:

• Use English in the subject.
• Keep the subject specific enough to be useful in CHANGE.md.
• Prefer a scope for anything outside a tiny root-only change.
• Do not use weak subjects such as update, fix bug, change code, misc, wip, or ..
• Use ! for breaking changes and explain the impact in the body.
• For release-note-only commits, use exactly docs(release): update generated changelog.

Install local commit validation:

make install-hooks

The hook checks commit subjects before git commit completes. It is a local Git mechanism; CI or branch protection should run the same script for server-side enforcement if needed.

Validation Checklist

Run checks proportional to the change:

• Java/shared behavior: mvn -s .mvn/settings.xml -q -DskipTests compile
• Full package: mvn -s .mvn/settings.xml clean package
• Changelog script: python3 -m py_compile dc3/bin/changelog.py
• Compose files: docker compose -f dc3/<file>.yml config --quiet
• YAML syntax: parse changed YAML after normalizing Maven placeholders such as @project.artifactId@
• Agent or docs changes: check links, command examples, stale filenames, and current workflow names

Before committing code that changes public behavior, mention what was verified and what was not verified.

Git Identity For AI Commits

AI-generated commits in this repository must use:

Author: Claude <209825114+claude[bot]@users.noreply.github.com>
Committer: Claude <209825114+claude[bot]@users.noreply.github.com>

Use command-scoped identity instead of changing repository config:

GIT_COMMITTER_NAME='Claude' GIT_COMMITTER_EMAIL='209825114+claude[bot]@users.noreply.github.com' \
git commit --author='Claude <209825114+claude[bot]@users.noreply.github.com>' -m '<message>'

Do not run git config --local user.name or git config --local user.email for this rule. Human contributors must keep their own identity.

Editing Rules

• Keep changes focused on the request.
• Do not revert unrelated user changes.
• Prefer existing patterns and helper APIs over new abstractions.
• Keep public/user-facing text in English unless a specific localized document is being edited.
• Preserve AGPL headers where they already exist.
• Avoid generated metadata churn unless the task requires it.
• Use structured parsers or existing toolchains for structured files when practical.

Documentation Rules

• Root README files in multiple languages should stay structurally aligned.
• Runtime and environment changes should update dc3/doc/ENVIRONMENT.md.
• Driver authoring changes should update dc3/doc/DRIVER-AUTHORING.md.
• Container changes should update compose examples and .env.example if variables change.
• Release workflow changes should update CONTRIBUTING.md and this file.