archflow

Visual Java-Native Platform for AI Agent Workflows

Build, visualize, and orchestrate AI agent workflows with a drag-and-drop designer and enterprise-grade Java backend.

Features | Quickstart | Agent Patterns | Production | Documentation | Examples

📖 Documentação em Português: docs/readme.md · Visão Geral · Roadmap

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Features

Visual Workflow Designer

• Web Component: <archflow-designer> works in React, Vue, Angular, Svelte, or vanilla HTML
• Drag-and-drop: 15+ node types plus n8n-style annotations (sticky notes, group frames, section dividers)
• Framework-agnostic: Zero frontend lock-in via standard Web Components and Shadow DOM
• Internationalised: PT-BR (default) and EN out of the box; over 1,180 translation keys spanning every UI surface
• npm distribution: npm install @archflow/component

Java-Native AI Engine

• LangChain4j 1.12.2: 15+ LLM providers (OpenAI, Anthropic, Google, Mistral, Ollama, and more)
• MCP Protocol: Model Context Protocol for standardized tool integration, with cleanup hooks for stdio servers
• Agent Skills: Load, activate, and manage behavioral instruction bundles (agentskills.io spec) — now per-tenant scoped
• Brain Sentry: Long-term agent memory with automatic context injection, hybrid search, and PII protection — per-tenant credentials
• Spring Boot 4.0.0: Native integration with the Spring ecosystem
• Suspend/Resume: Conversational workflows with dynamic forms and human-in-the-loop

Agent Patterns

archflow implements the industry-standard agent patterns validated by Anthropic, OpenAI, and Google:

Pattern	Description	Use Case
ReAct	Thought-Action-Observation loop	General tool use, the default agentic pattern
Plan-and-Execute	Planner + Executor + Replanner	Multi-step tasks with cost efficiency
ReWOO	Plan all tool calls upfront with placeholders	Batch processing, predictable workflows
Routing	Semantic + LLM-based query routing	Multi-domain dispatch (customer support)
Supervisor/Worker	Orchestrator delegates to specialized agents	Multi-agent coordination
Reflexion	Self-critique with reflection memory	Tasks with clear success/failure signal
CoT-SC	Multi-path sampling with majority voting	High-accuracy reasoning

Agent Types

Agent	Description
ConversationalAgent	Customer service with intent classification, escalation policy, episodic memory
ResearchAgent	Multi-step research with task decomposition and action planning
DataAnalysisAgent	Text-to-SQL, schema introspection, statistical analysis
MonitoringAgent	Continuous metric collection, anomaly detection, alert dispatch
SupervisorTemplate	Workflow template with worker coordination and quality checking

Enterprise Ready

• JWT auth filter: Validates Authorization: Bearer headers via JwtService, populates user/role/tenant attributes, rejects 401 on protected paths. Disabled in dev, enforced in prod (archflow.security.auth.enabled=true).
• Multi-tenant isolation: BrainSentry, Linktor, and Skills configs are partitioned per tenant via TenantContext — one tenant's update cannot leak into another's slot.
• Role-aware impersonation: X-Impersonate-Tenant is honoured only when the property gate is on and the caller's JWT carries the superadmin role.
• Bounded execution: Parallel executor enforces per-step (5 min) and aggregate (10 min) timeouts; cancels pending futures on overrun to release worker threads and semaphore permits.
• Plugin lifecycle: ArchflowPluginManager is AutoCloseable — unload(pluginId) closes the per-plugin classloader so jar handles are released on hot reload.
• Observability: OpenTelemetry tracing, Prometheus metrics, in-memory trace store with FIFO eviction, structured logging with tenant MDC.
• Two-Level Caching: Caffeine (L1) + Redis (L2) for LLM responses and embeddings.
• Plugin Architecture: Dynamic plugin loading with SPI discovery and marketplace.

Standalone Export

Design workflows visually, then export them as self-contained JARs that run anywhere — no server, no database, no cloud required.

Design (browser) → Export (JSON) → Package (JAR ~15 MB) → Deploy (any machine with Java 25)

# Run a standalone workflow — only needs Java + LLM API key
export ARCHFLOW_API_KEY=sk-xxx
java -jar my-workflow.jar customer-support.json --input "Track order #123"

• Zero infrastructure: No Spring Boot, no PostgreSQL, no Redis
• ~15 MB JAR: Includes flow engine, agent patterns, and LangChain4j runtime
• CLI interface: --input, --var key=value, --timeout, --threads, --plugins
• Environment config: ARCHFLOW_API_KEY, ARCHFLOW_MODEL, ARCHFLOW_PROVIDER

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Quickstart

Docker Compose (full stack)

git clone https://github.com/edsonmartins/archflow.git
cd archflow
docker compose up

This starts the archflow server on :8080, PostgreSQL (with pgvector), and Redis. The default profile is dev — demo seed data is loaded so the admin UI has something to render. See RELEASE_NOTES_v1.md for prod hardening.

Build from source

Requires JDK 25 and Maven 3.8+:

# Backend (211 tests in archflow-api alone, full suite ~700 tests)
mvn clean install

# Frontend
cd archflow-ui
npm install
npm run dev          # development server on :5173
npm run build        # production bundle (Vite lib + UMD)
npm run test:e2e     # 67 hermetic Playwright tests

Embed the designer

npm install @archflow/component

<archflow-designer
  workflow-id="customer-support"
  api-base="http://localhost:8080/api"
  theme="dark">
</archflow-designer>

See the archflow-ui README for React, Vue, and Angular integrations.

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Architecture

archflow/
├── archflow-model/                       # Domain models (Workflow, Flow, Step, Edge)
├── archflow-core/                        # Flow engine, JDBC state repo, audit log
├── archflow-agent/                       # Agent patterns (ReAct, Plan-and-Execute, ReWOO, CoT-SC)
│   ├── pattern/                          #   ReactAgentExecutor, PlanAndExecuteAgent, ReWOOExecutor
│   ├── handoff/                          #   AgentHandoff, AgentHandoffManager
│   └── routing/                          #   SemanticRouter (embedding + LLM hybrid)
├── archflow-events-proto/                # Event protocol shared between engine and UI
├── archflow-plugin-api/                  # Plugin SPI: catalog, metadata, lifecycle
├── archflow-plugin-loader/               # Classloader-isolated plugin loader (AutoCloseable)
├── archflow-langchain4j/                 # LangChain4j 1.12.2 integration
│   ├── archflow-langchain4j-openai/      #   OpenAI adapter
│   ├── archflow-langchain4j-anthropic/   #   Anthropic adapter
│   ├── archflow-langchain4j-mcp/         #   MCP Protocol client
│   ├── archflow-langchain4j-skills/      #   Agent Skills (SKILL.md loader + manager)
│   ├── archflow-langchain4j-realtime/    #   Realtime / voice adapters
│   └── archflow-langchain4j-provider-hub/#   Multi-LLM Hub (15+ providers)
├── archflow-brainsentry/                 # Brain Sentry integration (long-term memory, PII)
├── archflow-conversation/                # Suspend/resume, episodic memory, summarization
├── archflow-security/                    # JWT, RBAC, API keys, CORS
├── archflow-observability/               # OpenTelemetry, Micrometer, audit logging
├── archflow-performance/                 # Two-level caching, connection pooling
├── archflow-templates/                   # Workflow templates (Customer Support, RAG, etc.)
├── archflow-marketplace/                 # Extension marketplace with signature verification
├── archflow-workflow-tool/               # Workflow-as-Tool pattern
├── archflow-standalone/                  # Export workflows as standalone JARs (no server)
├── archflow-plugins/                     # Built-in agents (Conversational, Research, etc.)
├── archflow-api/                         # Spring Boot REST + WebSocket layer
│   └── config/                           #   JwtAuthenticationFilter, ImpersonationFilter, TenantContext
├── archflow-ui/                          # React 19 + Vite + Mantine + Web Component designer
├── docs/                                 # PT-BR documentation, architecture diagrams
├── docs-site/                            # Docusaurus site
└── examples/                             # Spring Boot, React, and Vue integration demos

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Agent Patterns

ReAct (Reason + Act)

ReactAgentExecutor executor = ReactAgentExecutor.builder()
    .reasoningFunction(ctx -> thinkAboutNextStep(ctx))
    .toolExecutor(action -> executeTool(action))
    .maxIterations(10)
    .timeout(Duration.ofSeconds(30))
    .build();

ReactResult result = executor.execute("What is the weather in Sao Paulo?");

Semantic Router

SemanticRouter router = SemanticRouter.builder()
    .embeddingFunction(text -> embedModel.embed(text))
    .addRoute("billing", "Payment, invoice, charges")
    .addRoute("technical", "Bug, error, crash")
    .confidenceThreshold(0.7)
    .strategy(RoutingStrategy.HYBRID) // semantic + LLM fallback
    .build();

RoutingResult result = router.route("My payment failed");
// result.getRouteName() => "billing"

Agent Skills

// Load skills from file system (SKILL.md with YAML front matter)
SkillsAdapter adapter = new SkillsAdapter();
adapter.configure(Map.of("skills.directory", "skills/"));

// List available skills
List<Map<String, String>> skills = adapter.execute("list_skills", null, context);
// => [{name: "docx", description: "Edit Word documents"}, ...]

// Activate a skill — returns full instructions for the LLM
Map<String, Object> skill = adapter.execute("activate_skill", "docx", context);
// => {name: "docx", content: "You are a document editor...", resources: [...]}

Skills are tracked per tenant via TenantContext — activating docx for tenant A does not surface as active for tenant B.

Brain Sentry (Long-Term Memory)

// Connect to Brain Sentry for cross-session agent memory
var config = BrainSentryConfig.of("http://localhost:8081/api", "api-key", "tenant-1");
var client = new BrainSentryClient(config);

// As a ToolInterceptor — automatically enriches prompts with relevant memories
var interceptor = new BrainSentryInterceptor(client, true);
toolChainBuilder.addInterceptor(interceptor); // order 5, before guardrails

// As an EpisodicMemory backend — hybrid search (vector + BM25 + graph)
EpisodicMemory memory = new BrainSentryMemoryAdapter(client);
memory.store(Episode.of("user-1", "Customer prefers email over phone", 0.8));
List<ScoredEpisode> results = memory.recall("contact preference", "user-1", 5);

Agent Handoff

AgentHandoffManager manager = new AgentHandoffManager();
manager.registerAgent("billing", "Billing Agent", Set.of("payments", "invoices"));
manager.registerAgent("support", "Tech Support", Set.of("bugs", "errors"));

AgentHandoff handoff = AgentHandoff.peer("support", "billing",
    Map.of("customerId", "12345"), "Customer needs billing help");
manager.executeHandoff(handoff);

Standalone Export

// Export any workflow to a standalone JSON file
FlowSerializer serializer = new FlowSerializer();
serializer.exportToFile(myFlow, Path.of("customer-support.json"));

// Later, run it anywhere without archflow server
StandaloneRunner runner = new StandaloneRunner();
FlowResult result = runner.run(new CliArgs(
    "customer-support.json", "Track my order #123",
    Map.of("customerId", "C-456"), 300, 4, null));

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Production Checklist

Before deploying to production, activate the prod Spring profile and supply these env vars:

Variable	Required	Purpose
ARCHFLOW_JWT_SECRET	yes	HS256 signing key (≥256 bits)
SPRING_DATASOURCE_URL	yes	PostgreSQL JDBC URL for flow_states
SPRING_DATASOURCE_USERNAME	yes	DB user
SPRING_DATASOURCE_PASSWORD	yes	DB password
SPRING_DATA_REDIS_HOST	optional	Redis host (defaults to localhost)
OTEL_EXPORTER_OTLP_ENDPOINT	optional	OpenTelemetry collector endpoint
ARCHFLOW_CORS_ORIGINS	recommended	Comma-separated allowed origins

The prod profile (application-prod.yml):

• Enables the JWT auth filter — unauthenticated calls to /api/admin/* return 401.
• Sets archflow.admin.seedDemoData=false — no fixture tenants/users in responses.
• Empties archflow.admin.tenantFallback — missing X-Tenant-Id fails fast instead of collapsing into a shared workspace.
• Disables X-Impersonate-Tenant until a JWT with superadmin role is presented.

Full operational contract: docs/development/RELEASE_NOTES_v1.md.

What is in-memory in v1

The following admin controllers store state in memory only — they reset on each redeploy. This is intentional for v1; override the bean definitions in ArchflowBeanConfiguration with JDBC implementations when persistence is required.

• TenantControllerImpl (tenant catalogue)
• WorkspaceControllerImpl (per-tenant users + scoped API keys)
• BrainSentryConfigControllerImpl, LinktorConfigControllerImpl, SkillsControllerImpl (per-tenant configs)
• GlobalConfigControllerImpl (LLM models, plan defaults, feature toggles — platform-wide, superadmin-only)
• ScheduledTriggerControllerImpl (Quartz job + cron registrations)

The execution-state path (flow_states table via JdbcStateRepository) is persisted — your running workflows survive restarts.

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Documentation

• 📖 docs/readme.md — PT-BR documentation index
• 🏗 Architecture — engine, plugins, adapters
• 🚀 Quickstart — first workflow in ~10 minutes
• 🛠 Stack — Java 25, Spring Boot 4.0.0, LangChain4j 1.12.2
• 📋 Release notes (v1) — operations, profiles, env vars
• 🗺 Roadmap — what's next
• 🌐 Docusaurus site — built docs (work in progress)

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Examples

Example	Description	Directory
Spring Boot	Minimal Spring Boot app embedding the engine	examples/spring-boot/
Spring Boot Integration	Full Spring Boot app with auth, observability, multi-LLM	examples/spring-boot-integration/
React	Designer embedded in a React SPA	examples/react/
Vue	Designer embedded in a Vue 3 app	examples/vue/
React Customer Support	End-to-end customer-support workflow with chat UI	examples/react-customer-support/

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Technology Stack

Layer	Technology
Backend	Java 25, Spring Boot 4.0.0, Apache Camel 4.3.0
AI	LangChain4j 1.12.2, MCP Protocol, Agent Skills, Brain Sentry
Frontend	React 19, TypeScript, Vite, Mantine UI, React Flow (@xyflow/react), react-i18next
Databases	PostgreSQL with pgvector, Redis
Observability	OpenTelemetry, Micrometer, Prometheus, Grafana, Jaeger
Testing	JUnit 5 + Mockito + AssertJ (backend), Playwright + Vitest (frontend)
Build	Maven 3.8+, Node.js 18+, Docker

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Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feat/my-feature)
3. Run mvn test and cd archflow-ui && npm run lint && npm run test:e2e before pushing
4. Commit with Conventional Commits (feat:, fix:, docs:)
5. Open a Pull Request

See SECURITY.md for reporting vulnerabilities and the Contribution Guide for code style and review expectations (Google Java Style, 4-space indent, 120-char lines).

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License

Apache License 2.0

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Built with LangChain4j · GitHub · Issues · Documentação PT-BR