Integration · Google Antigravity

# Architectural Governance for Google Antigravity

Google Antigravity lets coding agents plan, execute, and verify work across editor, terminal, and browser. Mneme adds deterministic architectural governance so autonomous agent workflows stay aligned with ADRs, constraints, and repository invariants.

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## Why Antigravity changes the governance problem

Agent-first IDEs move developers from writing every change to supervising autonomous execution. Antigravity is a particularly clean expression of that shift: agents plan tasks, run terminal commands, exercise the browser to verify behavior, and produce Artifacts — reviewable plans, screenshots, task lists, and verification outputs — that humans inspect later.

That changes what the surrounding infrastructure needs to do. PR review remains useful but is no longer the primary enforcement surface. By the time the diff exists, the agent has already chosen the architecture.

Antigravity makes agent work visible. The next layer has to make agent work governable.

## Where Mneme fits

Mneme runs as a repo-native governance layer before or during agent execution. The flow:

- Inject the relevant architectural decisions into the agent’s task context, derived deterministically from ADRs
- Validate proposed changes against compiled constraints at hook, commit, and CI boundaries
- Surface violations as structured verdicts the agent and human can both reason about

It does not run as an agent inside Antigravity. It runs as the layer Antigravity (or any other agent harness) calls before file writes, terminal actions, or commit.

## Governance surfaces in Antigravity-style workflows

The execution surfaces an agent-first IDE exposes — each a place architectural intent can survive or break:

Editor changes Terminal commands Generated files Browser-verified behavior Task plans Agent artifacts Workspace orchestration

The job of agentic IDE governance is to reach all of them with the same compiled constraints — not to enforce in some and miss others.

## What Mneme can enforce

Dependency policy

### Forbidden dependencies

Block disallowed libraries from entering autonomous code changes — even mid-session, before the agent commits.

Boundaries

### Architecture boundaries

Prevent cross-layer coupling, leaky abstractions, and unintended internal imports.

Approved patterns

### Approved abstractions

Make sure the agent uses the team’s sanctioned patterns instead of inventing parallel ones.

ADR enforcement

### ADR constraints

Validate generated changes against repository decision records before merge, with provenance back to the originating ADR.

Anti-patterns

### Anti-pattern blocks

Block structures the team has explicitly decided not to use, including deprecated dependencies.

Conventions

### Naming and path rules

Enforce repository conventions for paths, naming, and module organization across every agent surface.

## Artifacts are provenance, not governance

Antigravity Artifacts give humans a way to review what agents did — plans, screenshots, browser recordings, verification outputs. That is genuinely useful. It is also fundamentally different from governance.

Artifact provenance explains what happened. Architectural governance constrains what is allowed to happen.

See artifact provenance for the full distinction between the two layers and how they compose.

## Example flow

    Agent receives task
       ↓
    Mneme retrieves relevant ADRs
       ↓
    Governance packet is injected
       ↓
    Agent generates code
       ↓
    mneme check validates the diff
       ↓
    CI records the governance result

The agent does its job. The governance layer makes sure the work belongs in the system before it lands.

## Use Mneme to add architectural governance to agent-first development workflows

Open-source. Repo-native. Works alongside Google Antigravity and every other agent-first IDE — the same compiled architectural decisions enforced at hook, commit, PR, and CI.

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