Description

When channels.matrix is configured in openclaw.json, the gateway auto-registers plugins.entries.matrix on every restart. This conflicts with the Matrix extension at extensions/matrix/, which also auto-loads, resulting in a persistent warning:

plugins.entries.matrix: plugin matrix: duplicate plugin id detected; later plugin may be overridden
(/home/dolverin/.npm-global/lib/node_modules/openclaw/extensions/matrix/index.ts)

Steps to Reproduce

1. Configure channels.matrix in openclaw.json with a valid homeserver + token
2. Start/restart the gateway
3. Warning appears repeatedly in logs (every ~60s during config warning cycle)

Attempted Fixes

• Removing plugins.entries.matrix from config has no effect — the gateway re-adds it on restart because channels.matrix is present
• Setting plugins.entries.matrix.enabled: false gets overwritten

Expected Behavior

Either:

• The gateway should not auto-register plugins.entries.matrix when the extension already provides it, OR
• The extension and channel-config-based registration should be deduplicated silently

Environment

• OpenClaw 2026.2.12
• Linux (Ubuntu 24.04)
• Matrix homeserver: Synapse (self-hosted)

Impact

Cosmetic only — Matrix works fine despite the warning. No functional issues observed.