{"slug":"iflytek-backend-module-structure","name":"backend-module-structure","description":"Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction.","long_description":"---\nname: backend-module-structure\ndescription: Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction.\nlicense: Apache-2.0\n---\n\n# Backend Module Structure Skill\n\n## Trigger\n\nUse this skill when:\n- Adding or modifying Java backend code\n- Creating new services, controllers, repositories, or entities\n- Refactoring backend code across files\n- Reviewing backend code placement\n\n## Rules\n\n### Dependency Direction\n\nThe design-doc dependency direction:\n\n```\napp → domain, auth, search, storage, infra, notification\ninfra → domain          # implements domain repository interfaces\nauth → domain\nsearch → domain\nnotification → domain\nstorage → (independent) # pure SPI\n```\n\n**Design intent**: `skillhub-domain` should be the innermost layer, defining entities,\nrepository interfaces, and domain services without depending on infra, auth, search, or storage.\n\n**Code reality**: `skillhub-domain` declares a Maven dependency on `skillhub-storage` (via\n`pom.xml`), and several domain services (`SkillHardDeleteService`, `SkillDownloadService`,\n`SkillPublishService`, `SkillGovernanceService`, `SkillQueryService`,\n`SkillStorageDeletionCompensationService`) import `com.iflytek.skillhub.storage.ObjectStorageService`.\nThis is an existing deviation from the ideal clean architecture. New code should avoid adding\nfurther cross-module dependencies from domain.\n\n### Where to Place Code\n\n| Code Type | Module | Java Package |\n|-----------|--------|-------------|\n| Entity / Value Object | skillhub-domain | `com.iflytek.skillhub.domain.{submodule}/` |\n| Repository Interface | skillhub-domain | `com.iflytek.skillhub.domain.{submodule}/` |\n| Domain Service | skillhub-domain | `com.iflytek.skillhub.domain.{submodule}/service/` |\n| Domain Event | skillhub-domain | `com.iflytek.skillhub.domain/event/` |\n| Domain Exception | skillhub-domain | `com.iflytek.skillhub.domain/shared/exception/` |\n| JPA Repository Impl | skillhub-infra | `com.iflytek.skillhub.infra.repository/` |\n| Controller | skillhub-app | `com.iflytek.skillhub.controller/` |\n| App Service | skillhub-app | `com.iflytek.skillhub.service/` |\n| Query Repository | skillhub-app | `com.iflytek.skillhub.repository/` |\n| DTO / Response | skillhub-app | `com.iflytek.skillhub.dto/` |\n| OAuth2 / Auth Config | skillhub-auth | `com.iflytek.skillhub.auth/` |\n| Search SPI / Impl | skillhub-search | `com.iflytek.skillhub.search/` |\n| Storage SPI / Impl | skillhub-storage | `com.iflytek.skillhub.storage/` |\n| Notification Service | skillhub-notification | `com.iflytek.skillhub.notification/` |\n\n### Maven Modules\n\nThe parent POM (`server/pom.xml`) defines 7 modules with `spring-boot-starter-parent:3.2.3`:\n\n```\nskillhub-app | skillhub-domain | skillhub-auth | skillhub-search\nskillhub-storage | skillhub-infra | skillhub-notification\n```\n\n### Repository vs Query Repository\n\n- **Domain Repository** (`skillhub-domain`): Aggregate reads, state transitions, rule evaluation.\n  Returns domain objects. Defined as interfaces, implemented in `skillhub-infra` via Spring Data JPA.\n- **Query Repository** (`com.iflytek.skillhub.repository`): Read-model assembly, joins multiple\n  sources, presentation projection. Returns DTOs. Implemented directly in `skillhub-app`.\n\nCurrent query repositories:\n- `GovernanceQueryRepository` / `JpaGovernanceQueryRepository`\n- `MySkillQueryRepository` / `JpaMySkillQueryRepository`\n- `ProfileReviewQueryRepository` / `JpaProfileReviewQueryRepository`\n- `AdminSkillReportQueryRepository` / `JpaAdminSkillReportQueryRepository`\n\nWhen a new read use case arrives:\n1. If it's for state transition or domain rule → domain repository port\n2. If it's for page/list/detail response assembly with joins → app query repository\n3. If it's a thin single-aggregate read → direct domain repository call from app service\n4. If direct SQL/EntityManager is needed → add class-level comment explaining why\n\n### Building Backend Tests\n\nNever run `./mvnw -pl skillhub-app clean test` directly under `server/`. Use:\n```bash\nmake test-backend-app   # skillhub-app + dependencies (includes -am)\nmake test-backend       # all backend modules\n```\n\nRunning clean test on skillhub-app alone can fall back to stale artifacts from the local Maven\nrepository, surfacing misleading `cannot find symbol` and signature-mismatch errors.\n\n### User Identity Type\n\nUser identity is **always String** throughout the codebase. This covers:\n- Authentication, API params, permissions, audit\n- Resource owner, creator, reviewer, actor, submittedBy\n- All user-associated fields\n\nThe `UserAccount` entity uses `@Column(length = 128)` for its ID. The platform needs to support\nexternal SSO/OIDC/SCIM identity sources whose UIDs are typically stable strings.\n","tagline":"Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction.","category":"research","tags":["agent-skill"],"author":"iflytek","verified":false,"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"github fast track","sourceDetail":"iflytek/skillhub","creatorName":"iflytek","creatorUrl":"https://github.com/iflytek","sourceUrl":"https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/iflytek-backend-module-structure#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. 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Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"backend-module-structure\" as a Claude Code skill from https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"iflytek-backend-module-structure\",\"task\":\"Install backend-module-structure\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. 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notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/iflytek-backend-module-structure","api":"https://www.openagentskill.com/api/agent/skills/iflytek-backend-module-structure","audit":"https://www.openagentskill.com/skills/iflytek-backend-module-structure/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=iflytek-backend-module-structure&task=Use%20backend-module-structure%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20backend-module-structure%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20backend-module-structure%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/iflytek-backend-module-structure/install","manifest":"https://www.openagentskill.com/api/registry/manifest/iflytek-backend-module-structure"}},"supply_profile":{"track":{"slug":"research","label":"Research and knowledge work","shortLabel":"Research","description":"Deep research, source comparison, literature review, RAG, knowledge search, and reports."},"scenario":{"label":"Research agents","description":"I need my agent to research a topic, compare sources, and produce a concise report.","useCases":[{"slug":"research-agents","title":"Research agents"},{"slug":"coding-agents","title":"Coding agents"},{"slug":"browser-automation","title":"Browser automation"}]},"applicableAgents":["Claude Code","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add iflytek/skillhub --skill backend-module-structure","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":4937,"starsLabel":"4.9K","forks":821,"license":"Apache-2.0","qualityScore":84,"trustScore":78,"auditScore":84},"maintenance":{"status":"fresh","label":"6d since push","daysSincePush":6,"lastPushedAt":"2026-09-01T18:58:50+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, network or browser surface"]},"coverageTags":["Research","Research agents","agent-skill"]},"audit":{"audit_score":84,"risk_level":"needs_review","risk_label":"Needs review","quality_score":84,"trust_score":78,"maintenance_score":100,"security_score":79,"install_score":92,"warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, network or browser surface","Permission surface: shell or command execution, filesystem or document access"]},"quality_signals":{"model":"v2","star_score":25.85,"usage_score":0,"review_score":5.1,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code"],"use_cases":[{"slug":"research-agents","title":"Research agents","url":"https://www.openagentskill.com/use-cases/research-agents"},{"slug":"coding-agents","title":"Coding agents","url":"https://www.openagentskill.com/use-cases/coding-agents"},{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"}],"stacks":[{"slug":"research-report-agent","title":"Research report agent","url":"https://www.openagentskill.com/collections/research-report-agent"},{"slug":"coding-review-agent","title":"Coding review agent","url":"https://www.openagentskill.com/collections/coding-review-agent"},{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"}],"install":"npx skills add iflytek/skillhub --skill backend-module-structure","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add iflytek-backend-module-structure","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"backend-module-structure\" agent skill from https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"iflytek-backend-module-structure\",\"task\":\"Install backend-module-structure\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"backend-module-structure\" as a Claude Code skill from https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"iflytek-backend-module-structure\",\"task\":\"Install backend-module-structure\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"backend-module-structure\" from https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Rules for the SkillHub backend Maven multi-module clean architecture. Ensures agents place new code in the correct module and respect dependency direction. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"iflytek-backend-module-structure\",\"task\":\"Install backend-module-structure\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure","github_repo":"iflytek/skillhub","version":"1.0.0","license":"Apache-2.0","urls":{"web":"https://www.openagentskill.com/skills/iflytek-backend-module-structure","repository":"https://github.com/iflytek/skillhub/tree/main/.agents/skills/backend-module-structure","api":"/api/agent/skills/iflytek-backend-module-structure","install_api":"/api/skills/iflytek-backend-module-structure/install"},"meta":{"created_at":"2026-09-01T20:03:45.856816+00:00","updated_at":"2026-09-01T20:03:45.913739+00:00","agent_friendly":true}}