Data Modeling for AI Agents pt.3: the Orchestration Layer

Modern AI systems increasingly rely on multi-agent architectures, where specialized agents (planning, search, action, review, and response) collaborate to achieve complex goals. To make that collaboration reliable and efficient, we have found that data must flow cleanly across three key layers:

1. Systems of Record (SoR): The source of truth for your business and operational data.
2. Context & Knowledge Management System (CKMS): The intelligence layer that turns data into usable context for agents.
3. Orchestration Layer: The process brain that coordinates how agents use that context to act.

Each layer needs intentional data modeling. Done right, it eliminates duplication, reduces operational cost, and keeps your agents aligned with the real circumstances of your business, avoiding drift into disconnected silos.

👉 This series expands on the framework introduced in our main article, Data Modeling for Multi-Agent Architectures diving deeper into the third layer and how to design it effectively.

Here are the links to the rest of the series:

• Data Modeling for AI Agents pt.1: the Systems of Record Layer
• Data Modeling for AI Agents pt.2: the Context and Knowledge Layer
• Data Modeling for AI Agents pt.3: the Orchestration Layer: this article

The Orchestration Layer defines procedural rules for planning agents, specifying who does what, when, and under which conditions.

In practice, this often takes the form of DAGs (Directed Acyclic Graphs) and SOPs (standard operating procedures). These structures ensure that agents execute tasks reliably, consistently, and in alignment with business processes, without hardcoding logic into prompts or ad-hoc scripts.

1. Core Model: DAGs as Executable Workflows

Each process (e.g., “Customer Query Resolution”) should be modeled as a Directed Acyclic Graph (DAG):

• Each node represents a task or agent invocation
• Dependencies define execution order
• Inputs and expected outputs are clearly specified
• Error handling and retry logic are explicitly modeled

Why DAGs? They make the orchestration inspectable, testable, and replayable, which is critical for debugging multi-agent behavior. Store them as a combination of structured metadata and declarative configuration, rather than a single JSON blob.

2. Where and How to Store SOPs

Workflow definitions and SOPs can be persisted in several ways depending on maturity:

Best practice for early to mid-stage startups: Use Prefect or Temporal. Workflows are versioned as code, executions are tracked in a metadata DB, and failed tasks can be rerun or rolled back with minimal friction.

Consider storing SOP files in Git or object storage (e.g., S3) while keeping execution metadata in Postgres/SQL. This separation ensures traceability, observability, and flexibility for branching or rollback.

3. Linking Orchestration Data to CKMS

Workflows should explicitly reference CKMS entities:

• Each workflow run logs which context snapshot IDs it read from or wrote to
• CKMS records which workflow last interacted with each knowledge object

This guarantees context lineage, allowing agents to reason consistently and providing auditability. Feedback loops can also be established: orchestration logs → CKMS updates → inform future agent decisions.

4. Stack Options

A pragmatic orchestration stack may include:

• Workflow engine: Prefect, Temporal, Airflow, or Dagster (choose based on team size and maturity)
• Metadata storage: Postgres or SQLite for workflow state, versioning, and execution logs
• Object storage: Git or S3 for SOP/YAML/DSL workflow definitions
• Integration layer: Lightweight API connecting agents to orchestrator

Agents should never directly manipulate workflow definitions, the orchestrator enforces structure and consistency.

5. Practical Example: Hybrid SOP Model

Instead of storing the full workflow config in Postgres, store metadata and version pointers:

-- orchestration_workflows table
id | name                  | version | config_path              | created_at
---|------------------------|---------|--------------------------|------------
1  | customer_query_dag     | v2      | s3://workflows/customer_v2.yaml | 2025-10-15

At runtime, the orchestrator loads the workflow, executes tasks, and logs state in the metadata DB. This setup provides:

• Traceability: config history in Git/S3
• Observability: execution states and logs in DB
• Flexibility: easy rollback or branching

6. Common Pitfalls

1. Embedding workflow logic in code or prompts → hard to debug or version
2. Storing all SOPs in a single JSON blob → difficult to inspect or modify
3. Ignoring CKMS linkage → agents can act on stale or inconsistent context
4. No execution metadata tracking → impossible to replay or audit workflows

7. Key Takeaways

• Model orchestration workflows as DAGs with metadata, not hardcoded logic
• Store SOPs in versioned storage (Git/S3) and track execution state separately
• Link workflow runs to CKMS snapshots to maintain contextual consistency
• Choose a stack (Prefect, Temporal, Postgres/S3) that balances flexibility, observability, and simplicity

Proper orchestration ensures multi-agent AI systems act reliably, contextually, and predictably, even as workflows evolve.