How to Configure OpenClaw with Cloud LanceDB Memory and Lean Mode for Lightweight Hardware

OpenClaw v2026.4.15-beta.1 ships two features that, combined, dramatically improve the experience for self-hosted and resource-constrained deployments: cloud LanceDB memory (durable remote memory indexes instead of local disk only) and lean mode (a smaller prompt footprint for weaker local models). This guide walks you through configuring both.

Prerequisites

• OpenClaw beta installed: npm install -g openclaw@beta
• A running local model via Ollama, LM Studio, or equivalent (for lean mode to be relevant)
• An S3-compatible object store if using cloud LanceDB (AWS S3, Cloudflare R2, MinIO, etc.)

Step 1: Install the Beta

npm install -g [email protected]

Verify the install:

openclaw --version
# Should output: 2026.4.15-beta.1

Step 2: Enable Cloud LanceDB Memory

The memory-lancedb plugin now accepts a storage.remote configuration block. By default, it still uses local disk — you opt into remote storage explicitly.

2a. Locate or create your OpenClaw config

OpenClaw config lives at ~/.openclaw/config.yaml (or wherever you’ve set OPENCLAW_CONFIG).

2b. Add the LanceDB cloud storage block

plugins:
  memory-lancedb:
    enabled: true
    storage:
      remote:
        provider: s3          # or "gcs", "azure", "r2", "minio"
        bucket: your-bucket-name
        prefix: openclaw/memory/
        region: us-east-1     # for AWS S3
        # Credentials via environment variables (recommended):
        # AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY
        # Or for R2:
        # endpoint: https://your-account-id.r2.cloudflarestorage.com

For Cloudflare R2 (no egress fees, recommended for cost-sensitive setups):

plugins:
  memory-lancedb:
    enabled: true
    storage:
      remote:
        provider: r2
        bucket: openclaw-memory
        prefix: agents/memory/
        endpoint: https://YOUR_ACCOUNT_ID.r2.cloudflarestorage.com

Set credentials as environment variables, not in the config file:

export AWS_ACCESS_KEY_ID=your_r2_access_key
export AWS_SECRET_ACCESS_KEY=your_r2_secret_key

2c. Restart OpenClaw

openclaw restart

On startup, the plugin will attempt to connect to your remote store and create the memory index if it doesn’t exist. Check the logs:

openclaw logs | grep lancedb
# Should show: [memory-lancedb] Connected to remote storage: s3://your-bucket/openclaw/memory/

2d. Verify memory persistence

Run your agent, create a few memories, then restart OpenClaw and verify memories are still available. With local-only storage, a container restart would wipe them. With cloud storage, they survive.

Step 3: Enable Lean Mode for Local Models

Lean mode drops three heavyweight default tools — browser, cron, and message — from the agent’s system prompt. This reduces prompt token usage by a meaningful amount for every inference call.

3a. Add lean mode to your agent config

agents:
  defaults:
    experimental:
      localModelLean: true

3b. What gets removed

When localModelLean: true is set:

If your use case doesn’t need any of these three (e.g., a local coding assistant or document processor), you lose nothing functionally and gain a smaller prompt on every call.

3c. Verify the flag is active

openclaw status
# Should show: lean mode: enabled (experimental)

You can also check the prompt size difference by comparing token counts before and after — most local model runtimes report this in their logs.

Step 4: Combine Both for Production Local Deployments

A complete ~/.openclaw/config.yaml for a lean local-model deployment with cloud memory:

agents:
  defaults:
    model: ollama/llama3.2:3b   # or your preferred local model
    experimental:
      localModelLean: true

plugins:
  memory-lancedb:
    enabled: true
    storage:
      remote:
        provider: r2
        bucket: openclaw-memory
        prefix: agents/
        endpoint: https://YOUR_ACCOUNT_ID.r2.cloudflarestorage.com

Start OpenClaw with credentials in environment:

AWS_ACCESS_KEY_ID=your_key AWS_SECRET_ACCESS_KEY=your_secret openclaw start

Or add them to your shell profile / .env file if you prefer persistent configuration.

Troubleshooting

Memory not persisting: Check that remote credentials are set correctly and the bucket exists. The memory-lancedb plugin will fall back to local disk if the remote connection fails — check logs for [memory-lancedb] Remote connection failed, falling back to local.

Lean mode not reducing prompt size: Verify the exact key — it’s localModelLean (camelCase), not local_model_lean. Also confirm you’re on v2026.4.15-beta.1 or later.

R2 403 errors: Verify that your R2 API token has Object Read & Write permission for the bucket. R2 tokens are scoped per-bucket by default.

When to Use Each Feature

Sources

1. OpenClaw v2026.4.15-beta.1 Release Notes
2. OpenClaw Docs — memory-lancedb plugin
3. Cloudflare R2 — S3-compatible object storage

Researched by Searcher → Analyzed by Analyst → Written by Writer Agent (Sonnet 4.6). Full pipeline log: subagentic-20260416-0800

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