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openclaw/docs/concepts/experimental-features.md

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---
summary: "What experimental flags mean in OpenClaw and which ones are currently documented"
title: "Experimental features"
read_when:
- You see an `.experimental` config key and want to know whether it is stable
- You want to try preview runtime features without confusing them with normal defaults
- You want one place to find the currently documented experimental flags
---
Experimental features in OpenClaw are **opt-in preview surfaces**. They are
behind explicit flags because they still need real-world mileage before they
deserve a stable default or a long-lived public contract.
Treat them differently from normal config:
- Keep them **off by default** unless the related doc tells you to try one.
- Expect **shape and behavior to change** faster than stable config.
- Prefer the stable path first when one already exists.
- If you are rolling OpenClaw out broadly, test experimental flags in a smaller
environment before baking them into a shared baseline.
## Currently documented flags
| Surface | Key | Use it when | More |
| ------------------------ | --------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------- |
| Local model runtime | `agents.defaults.experimental.localModelLean` | A smaller or stricter local backend chokes on OpenClaw's full default tool surface | [Local Models](/gateway/local-models) |
| Memory search | `agents.defaults.memorySearch.experimental.sessionMemory` | You want `memory_search` to index prior session transcripts and accept the extra storage/indexing cost | [Memory configuration reference](/reference/memory-config#session-memory-search-experimental) |
| Structured planning tool | `tools.experimental.planTool` | You want the structured `update_plan` tool exposed for multi-step work tracking in compatible runtimes and UIs | [Gateway configuration reference](/gateway/config-tools#toolsexperimental) |
## Local model lean mode
`agents.defaults.experimental.localModelLean: true` is a pressure-release valve for weaker local-model setups. When it is on, OpenClaw drops three default tools — `browser`, `cron`, and `message` — from the agent's tool surface for every turn. Nothing else changes.
### Why these three tools
These three tools have the largest descriptions and the most parameter shapes in the default OpenClaw runtime. On a small-context or stricter OpenAI-compatible backend that is the difference between:
- Tool schemas fitting cleanly in the prompt vs. crowding out conversation history.
- The model picking the right tool vs. emitting malformed tool calls because there are too many similar-looking schemas.
- The Chat Completions adapter staying inside the server's structured-output limits vs. tripping a 400 on tool-call payload size.
Removing them does not silently rewire OpenClaw — it just makes the tool list shorter. The model still has `read`, `write`, `edit`, `exec`, `apply_patch`, web search/fetch (when configured), memory, and session/agent tools available.
### When to turn it on
Enable lean mode when you have already proved the model can talk to the Gateway but full agent turns misbehave. The typical signal chain is:
1. `openclaw infer model run --gateway --model <ref> --prompt "Reply with exactly: pong"` succeeds.
2. A normal agent turn fails with malformed tool calls, oversized prompts, or the model ignoring its tools.
3. Toggling `localModelLean: true` clears the failure.
### When to leave it off
If your backend handles the full default runtime cleanly, leave this off. Lean mode is a workaround, not a default. It exists because some local stacks need a smaller tool surface to behave; hosted models and well-resourced local rigs do not.
Lean mode also does not replace `tools.profile`, `tools.allow`/`tools.deny`, or the model `compat.supportsTools: false` escape hatch. If you need a permanent narrower tool surface for a specific agent, prefer those stable knobs over the experimental flag.
### Enable
```json5
{
agents: {
defaults: {
experimental: {
localModelLean: true,
},
},
},
}
```
Restart the Gateway after changing the flag, then confirm the trimmed tool list with:
```bash
openclaw status --deep
```
The deep status output lists the active agent tools; `browser`, `cron`, and `message` should be absent when lean mode is on.
## Experimental does not mean hidden
If a feature is experimental, OpenClaw should say so plainly in docs and in the
config path itself. What it should **not** do is smuggle preview behavior into a
stable-looking default knob and pretend that is normal. That's how config
surfaces get messy.
## Related
- [Features](/concepts/features)
- [Release channels](/install/development-channels)