Opus 4.6 lands across Bedrock and API gateways; VS Code gains /mcp dialog, sessions panel, and plan views; Windows clipboard, voice mode, and performance regressions addressed.
/mcp in the chat panel to enable/disable servers, reconnect, and manage OAuth authentication without switching to the terminal/rename to work while Claude is processing, instead of being silently queued/poll rate to once per 10 minutes while connected (was 1–2s), cutting server load ~300×. Reconnection is unaffected — transport loss immediately wakes fast polling.ANTHROPIC_BASE_URL with a third-party gateway — tool search now correctly detects proxy endpoints and disables tool_reference blocksAPI Error: 400 This model does not support the effort parameter when using custom Bedrock inference profiles or other model identifiers not matching standard Claude naming patternsToolSearch — the server renders tool schemas with system-prompt-style tags at the prompt tail, which could confuse models into stopping earlyinstructions connects after the first turnSet-ClipboardvoiceEnabled: true was set in settings#NNN references incorrectly pointing to the current repository instead of the linked URL.claude/settings.json has a legacy Opus model string pinned/plugin/security-review command failing with unknown option merge-base on older git versions/color command having no way to reset back to the default color — /color default, /color gray, /color reset, and /color none now restore the defaultAskUserQuestion preview dialog that re-ran markdown rendering on every keystroke in the notes inputpermissions.defaultMode settings values other than acceptEdits or plan being applied in Claude Code Remote environments — they are now ignored--resume (~600 tokens saved per resume)