Problem Description

When a user explicitly changes the model via /model <model-id>, the session-level model override persists even after running /new or /reset. This causes the session to continue using the previously selected model instead of falling back to the configured default (agents.defaults.model.primary).

This behavior is unexpected because:

1. /new and /reset are documented as "start fresh" commands
2. Gateway restarts do not clear this override
3. The only way to restore the default model is to manually run /status default (or session_status model=default)

Steps to Reproduce

1. Configure agents.defaults.model.primary to anthropic_kimi/k2.6-code-preview
2. Start a conversation, verify model is anthropic_kimi/k2.6-code-preview
3. Run /model openai-codex/gpt-5.4 to switch model
4. Run /new or /reset to "start fresh"
5. Check /status — model is still openai-codex/gpt-5.4 (unexpected)
6. Expected: model should reset to anthropic_kimi/k2.6-code-preview

Current Workaround

After /new, manually run /status default to clear the model override.

Proposed Solutions

Option A (Preferred): /new and /reset should automatically clear session-level model overrides, respecting the agents.defaults.model configuration.

Option B: Add a configuration option like session.resetClearsModelOverride: true to enable this behavior explicitly.

Environment

• OpenClaw version: 2026.4.12
• Config: agents.defaults.model.primary = "anthropic_kimi/k2.6-code-preview"

Signatures

• Reported by: MiaoDX MiaoDX@hotmail.com
• Co-signed by: GSD GSD@floating.ai