The Trust Stack for AI Agents

Building the protocol for governed, verifiable, always-on agent systems.

Substr8 Labs is developing the infrastructure layer for trustworthy AI agents โ€” combining identity, governance, memory, delegation, execution integrity, and proof into one verifiable stack.

Join early access to prototypes and research. No spam โ€” real updates only.

AI agents are powerful. But they still lack trust.

Today's agents can act, call tools, retrieve memory, and make decisions โ€” but most systems still rely on black-box execution and fragile assumptions.

That creates hard questions:

Who is this agent, really?
What was it allowed to do?
What context did it have?
What did it actually do?
Can any of that be verified later?

Substr8 Labs exists to answer those questions.

A protocol for verifiable agent execution

We believe the next generation of agents needs more than orchestration. It needs a trust layer.

Our stack is built around a simple idea:

Every meaningful agent action should leave a verifiable proof.

โœ“ Governed identity
โœ“ Auditable memory
โœ“ Capability-based control
โœ“ Delegated authority
โœ“ Execution integrity
โœ“ Cryptographic proof

The Substr8 Trust Stack

FDAA

File-Driven Agent Architecture โ€” Portable, persistent, provable agent identity and execution foundation.

GAM

Git-Native Agent Memory โ€” Deterministic memory with governance, retrieval, and auditability.

ACC

Agent Capability Control โ€” Fine-grained authorization for skills, tools, and actions.

DCT

Delegation Capability Tokens โ€” Bounded, attenuated delegation when agents spawn or act on behalf of others.

RIL

Runtime Integrity Layer โ€” Governed execution substrate that enforces structural correctness and continuity.

RunProof

The proof layer that captures what happened, under what conditions, and whether it can be trusted.

Two products. One trust stack.

Governance Layer

TowerHQ

The governance layer for agents

Create agents, define identity, manage permissions, and oversee governed execution.

  • Define agent identity โ€” who the agent is
  • Manage permissions โ€” what it can do
  • Oversee execution โ€” what proof it must produce
Join Waitlist โ†’
Application Layer

ThreadHQ

The application layer for agents

Deploy verified agents into chats, voice, and customer-facing experiences with memory and proof built in.

  • Persistent memory โ€” agents that never forget
  • Verifiable context โ€” inspect what was retrieved
  • Proof-backed execution โ€” see what it did, not just said
Join Waitlist โ†’

From workflows to applications to always-on agents

We see agent systems evolving across three stages:

1. Workflows

Bounded, verifiable task trees

2. Agentic Applications

Stateful systems with branching and memory

3. Always-On Agents

Persistent, event-driven agents with append-only proof histories

Substr8 Labs is building the trust layer that makes each stage verifiable.

Built on Open Research

We're not just shipping features โ€” we're defining how AI agents should work.

Our research on provable, portable, auditable AI architecture underpins everything we build.

From the Blog

We build in public โ€” sharing what works, what doesn't, and everything in between.

AI agents need more than capability. They need accountability.

We're building the infrastructure that makes agent systems inspectable, governable, and provable by design.