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Architecture

Governed AI architecture for enterprise workflow execution

Sastra combines document execution, proprietary intelligence, governed memory, privacy controls, auditability, and human approval paths for document-heavy enterprise workflows.
Core stack

Three product layers with one governance model

The stack separates intelligence, control, and document workflow execution so enterprises can adopt AI with clearer boundaries.

Document workflow/action layer

SastraPDF

The product layer where governed AI capabilities are applied to real business documents for creation, extraction, redaction, review, signing, routing, approval, audit, transformation, and workflow continuation.

Governance and execution control layer

MedhaOS

The control layer for governance, memory, privacy, policy, identity, audit, RBAC, approval workflows, tenant isolation, and execution controls.

Proprietary intelligence engine

Medha

The reasoning, retrieval, contextual understanding, and workflow assistance engine used by the governed product stack.

Control layers

Enterprise controls around every workflow

Every workflow should be traceable through user actions, AI suggestions, approval decisions, policy checks, and execution logs.

MedhaOS Edge Guard

A deployment pattern for customer-controlled data boundaries, private integrations, and sensitive data handling before AI reasoning.

RBAC and identity

Role-based access control, identity-aware actions, tenant isolation, and permission-aware execution.

Audit layer

Trace user actions, AI suggestions, approval decisions, policy checks, system events, and execution logs.

Human approval layer

Automation can be governed through roles, policies, approval rules, and audit trails so accountable users remain in control.

Enterprise integrations

Secure integrations with document systems, identity providers, workflow tools, enterprise applications, and systems of record.

Private deployment readiness

Support for cloud, private cloud, hybrid, on-premise components, customer-controlled data boundaries, and policy enforcement.

Privacy and security

Sensitive data protection is part of the architecture

Sensitive enterprise data can be classified, filtered, tokenized, or de-identified before AI reasoning, depending on deployment configuration.

Data protection

Classification, filtering, tokenization, and de-identification patterns can reduce exposure before intelligence workflows run.

Security controls

Zero Trust principles, RBAC, tenant isolation, encryption, audit logs, policy enforcement, approval workflows, and private deployment readiness.

Safe execution

Workflow actions can be routed through approval rules, role checks, policy checks, and execution logs.

Execution path

From document context to governed action

The architecture is designed for workflow execution, not just question answering.

1Capture context

Documents, users, systems, policies, and task state are mapped into a workflow context.

2Protect sensitive data

Data can be classified, filtered, tokenized, or de-identified depending on deployment configuration.

3Reason and retrieve

Medha supports enterprise reasoning, retrieval, contextual understanding, and workflow assistance.

4Apply policy and approval

MedhaOS applies identity, RBAC, policy enforcement, approval rules, audit, and execution controls.

5Execute document workflow

SastraPDF applies governed intelligence to creation, extraction, redaction, review, signing, routing, approval, audit, transformation, and continuation.

6Record the trail

User actions, AI suggestions, approval decisions, policy checks, and execution logs remain traceable.

Design a governed AI architecture for your workflow

Discuss private, hybrid, cloud, on-premise component, Edge Guard, RBAC, audit, and approval requirements.

Sastra is a product-led enterprise AI company that builds governed AI products and delivers the services required to deploy them safely in real business environments.

DPIIT-recognized startup, founded in 2012, registered in India. Medha, MedhaOS, and SastraPDF are product names of Sastra Innovations.

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