Unclear It is not clear what the pane preview shows or does, or whether it is switched on for anyone by default.
What
MCP servers are outside programs that give Claude Code extra tools. Claude Code already had one preview setting for them, consentPreview, controlled by a flag. A flag is a switch Anthropic's server can turn on remotely. A second preview setting now sits next to it.
- The
mcpServersgetter now also works outpanePreview, which is controlled by a different flag. - Each value sticks for the session. Once it turns off, it stays off.
- The two values are combined in one place.
- The per-session state gains
panePreviewand dropspreloadOwedAt.
What the pane preview shows has not been traced.
Why
Nothing visible changes unless the flag is on. The code suggests a preview of an MCP pane is being prepared.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear what the pane preview shows or does, or whether it is switched on for anyone by default.