Claw-Written Plugin Adds Qwen 3.8 27B Thinking Level Support to OpenClaw

Running Qwen 3.8 27B on llama.cpp with OpenClaw 2026.6.9 but missing native thinking-level control? One OpenClaw user hit the same wall and let their AI agent write a plugin to fix it — fully generated, untested by human eyes.

Why You Need This Plugin

Qwen 3.8 controls thinking levels via the chat template rather than a dedicated parameter. OpenClaw's llama.cpp backend at version 2026.6.9 doesn't map this out of the box, so thinking levels get ignored or misapplied. The plugin bridges that gap.

What It Does

• Per-API-call thinking levels — correctly injects the enable_thinking value into the chat template for each request.
• Separate level for heartbeats — set a different thinking level for background heartbeat calls (the author uses xhigh).
• Instruct mode (thinking off) — disables thinking and applies sampling parameters recommended by unsloth for optimal output.
• Optional timeout guard — force compaction to instruct mode to avoid timeouts during long reasoning chains.

How to Get It

The plugin is published on GitLab:

git clone https://gitlab.com/moltwithhat/llamacpp-qwen-thinking

Author's note: “I didn't even look at the code” — the entire thing was written by the AI agent itself. It's a proof-of-concept that agents can produce useful, shareable tools without human review.

Who It's For

Anyone running Qwen 3.8 (or similar models) on llama.cpp through OpenClaw who wants fine-grained control over thinking levels per request. If you rely on heartbeats or need instruct mode as a fallback, this saves you the plumbing work.