# How to Set Up the Memory Layer for Persistent Patterns Across AIOX Sessions

> Learn to set up the memory layer in SynkraAI/aiox-core for persistent patterns. Capture, store, and reuse patterns across multiple agent executions with MemoryBridge.

- Repository: [SynkraAI/aiox-core](https://github.com/synkraai/aiox-core)
- Tags: how-to-guide
- Published: 2026-03-15

---

**Configure the `MemoryBridge` and persistence helpers in SynkraAI/aiox-core to capture, store, and reuse patterns across multiple agent executions.**

The AIOX memory layer enables agents to remember context, gotchas, and file-evolution snapshots between runs. According to the SynkraAI/aiox-core source code, this system relies on a consumer-only bridge, an optional provider interface, and disk-based persistence helpers that serialize state to the `.aiox/` directory.

## Understanding the Core Components

The memory architecture consists of three interconnected parts:

- **`MemoryBridge`** – Located at [`core/synapse/memory/memory-bridge.js`](https://github.com/SynkraAI/aiox-core/blob/main/core/synapse/memory/memory-bridge.js), this consumer-only bridge fetches memory hints for the SYNAPSE engine while enforcing strict **token budgets** and **timeouts**.
- **`SynapseMemoryProvider`** – Found in [`core/synapse/memory/synapse-memory-provider.js`](https://github.com/SynkraAI/aiox-core/blob/main/core/synapse/memory/synapse-memory-provider.js), this open-source provider lazily loads the optional Memory Intelligence System (MIS), applies sector preferences, and caches results per session.
- **Persistence Helpers** – The `ContextSnapshot`, `FileEvolutionTracker`, and `TimelineManager` modules (under `core/memory/`) record repository state, detect drifts, and build a chronological timeline that survives process restarts.

## Step-by-Step Configuration

### Enable the Memory Layer

The memory subsystem activates automatically when the SYNAPSE engine requests hints. To force initialization during development, set the environment variable:

```bash
export AIOX_MEMORY_ENABLED=true

```

The bridge checks `process.env.AIOX_MEMORY_ENABLED` internally and degrades gracefully if the MIS package is missing.

### Instantiate the MemoryBridge

Create a bridge instance in your orchestrator to mediate between agents and persistent storage. In [`src/orchestration/master-orchestrator.js`](https://github.com/SynkraAI/aiox-core/blob/main/src/orchestration/master-orchestrator.js):

```javascript
const { MemoryBridge } = require('../.aiox-core/core/synapse/memory/memory-bridge');

class MasterOrchestrator {
  constructor() {
    // Default timeout is 15ms; override as needed
    this.memoryBridge = new MemoryBridge({ timeout: 20 });
  }

  async getHints(agentId, bracket, tokenBudget) {
    return this.memoryBridge.getMemoryHints(agentId, bracket, tokenBudget);
  }
}

```

The `MemoryBridge` constructor and `getMemoryHints` method are implemented in [`core/synapse/memory/memory-bridge.js`](https://github.com/SynkraAI/aiox-core/blob/main/core/synapse/memory/memory-bridge.js) (lines 53–99).

### Integrate with the SYNAPSE Engine

Hook the bridge into the processing pipeline so the engine retrieves hints conditionally based on the active **bracket**. In [`engine.js`](https://github.com/SynkraAI/aiox-core/blob/main/engine.js), the integration appears as:

```javascript
if (needsMemoryHints) {
  const hints = await this.memoryBridge.getMemoryHints(
    activeAgent.id,
    activeBracket,
    tokenBudget,
  );
  // Inject hints into the prompt context...
}

```

This pattern is verified in the engine test suite at [`tests/synapse/engine.test.js`](https://github.com/SynkraAI/aiox-core/blob/main/tests/synapse/engine.test.js) (lines 450–466).

### Configure Sector Preferences (Optional)

`SynapseMemoryProvider` filters memories using `AGENT_SECTOR_PREFERENCES`. Override defaults by creating a local configuration file:

```javascript
// .aiox-core/config/memory-sectors.js
module.exports = {
  dev: ['procedural', 'semantic'],
  qa: ['reflective', 'episodic'],
  // Add custom agent mappings...
};

```

The provider merges this configuration with built-in defaults defined in [`core/synapse/memory/synapse-memory-provider.js`](https://github.com/SynkraAI/aiox-core/blob/main/core/synapse/memory/synapse-memory-provider.js) (lines 32–44).

### Persist Patterns Between Runs

The persistence workflow executes three distinct phases:

1. **Snapshot** – [`context-snapshot.js`](https://github.com/SynkraAI/aiox-core/blob/main/context-snapshot.js) records the full file tree, content hashes, and timestamps.
2. **Track Evolution** – [`file-evolution-tracker.js`](https://github.com/SynkraAI/aiox-core/blob/main/file-evolution-tracker.js) diffs the current snapshot against the previous run to generate **gotchas** (repeated failures) and **change lists**.
3. **Timeline Aggregation** – [`timeline-manager.js`](https://github.com/SynkraAI/aiox-core/blob/main/timeline-manager.js) compiles snapshots, evolutions, and build-state caches into [`.aiox/timeline.json`](https://github.com/SynkraAI/aiox-core/blob/main/.aiox/timeline.json).

Invoke these helpers directly or rely on automatic execution via [`execution/context-injector.js`](https://github.com/SynkraAI/aiox-core/blob/main/execution/context-injector.js):

```javascript
const { ContextSnapshot } = require('../.aiox-core/core/memory/context-snapshot');
const { FileEvolutionTracker } = require('../.aiox-core/core/memory/file-evolution-tracker');
const { TimelineManager } = require('../.aiox-core/core/memory/timeline-manager');

async function captureSession() {
  const snapshot = await ContextSnapshot.take();
  const evolution = await FileEvolutionTracker.compare(snapshot);
  await TimelineManager.record({ snapshot, evolution });
}

```

## Verifying Cross-Session Persistence

Confirm that patterns survive process restarts by running the integration test suite:

```bash
npm test tests/integration/pipeline-memory-integration.test.js

```

Successful execution produces output confirming that the timeline file updates and token budgets are respected:

```

✔ should include memory metadata in metrics
✔ should respect token budget
✔ timeline file updated with new snapshot

```

The end-to-end verification logic resides in [`tests/integration/pipeline-memory-integration.test.js`](https://github.com/SynkraAI/aiox-core/blob/main/tests/integration/pipeline-memory-integration.test.js) (lines 118–255).

## Summary

- **Instantiate** `MemoryBridge` in your orchestrator to mediate memory requests with configurable timeouts.
- **Ensure** the SYNAPSE engine calls `memoryBridge.getMemoryHints` when the active bracket requires historical context.
- **Customize** sector preferences per agent type via [`memory-sectors.js`](https://github.com/SynkraAI/aiox-core/blob/main/memory-sectors.js) to filter relevant memory types.
- **Persist** state using `ContextSnapshot`, `FileEvolutionTracker`, and `TimelineManager`, which serialize to [`.aiox/timeline.json`](https://github.com/SynkraAI/aiox-core/blob/main/.aiox/timeline.json).
- **Validate** setup with the `pipeline-memory-integration` test suite to confirm patterns persist across sessions.

## Frequently Asked Questions

### What is the AIOX memory layer?

The AIOX memory layer is a persistence system in SynkraAI/aiox-core that captures **gotchas**, **metadata**, and **file-evolution snapshots** across agent sessions. It enables the SYNAPSE engine to recall past failures and contextual changes when processing new requests.

### How does the MemoryBridge enforce resource limits?

The `MemoryBridge` accepts a `timeout` parameter in its constructor (default 15ms) and requires a `tokenBudget` argument in `getMemoryHints()`. According to [`memory-bridge.js`](https://github.com/SynkraAI/aiox-core/blob/main/memory-bridge.js), the implementation degrades gracefully if the MIS package is unavailable, ensuring the engine never blocks on memory retrieval.

### Where are persistent patterns stored?

Persistent patterns are serialized to [`.aiox/timeline.json`](https://github.com/SynkraAI/aiox-core/blob/main/.aiox/timeline.json) by the `TimelineManager`. This file aggregates outputs from `ContextSnapshot` (file tree hashes) and `FileEvolutionTracker` (diffs and gotchas), creating a chronological record that survives process restarts.

### Can I use the memory layer without the MIS package?

Yes. The `SynapseMemoryProvider` in [`synapse-memory-provider.js`](https://github.com/SynkraAI/aiox-core/blob/main/synapse-memory-provider.js) lazily loads the optional Memory Intelligence System (MIS) loader. If MIS is not installed, the provider operates in degraded mode, serving cached sector preferences and skipping advanced intelligence features while maintaining basic persistence through the timeline manager.