Claude docs changes for March 11th, 2026 [diff]

Executive Summary

• New /btw slash command lets you ask quick side questions without adding to conversation history — runs independently even while Claude is working, and answers appear in a dismissible overlay
• Plugin development workflow improved: /reload-plugins now hot-reloads plugins without a full restart (LSP config changes still require restart)
• Files API documentation updated with better code examples using $FILE_ID variable instead of hardcoded IDs, and clarified storage/retention language

Claude Code changes

Changed documents

best-practices [Source]

• Added recommendation to use /btw for quick questions that don't need to stay in context — the answer appears in a dismissible overlay and never enters conversation history. [line 425] [Source]

discover-plugins [Source]

• When auto-update updates installed plugins, the notification now prompts users to run /reload-plugins instead of suggesting a full restart of Claude Code. [line 444] [Source]

interactive-mode [Source]

• Added /btw <question> to the slash command table for asking side questions without adding to conversation history. [line 81] [Source]
• New full section documenting "Side questions with /btw": can run while Claude is working, has no tool access, is single-response only, reuses the parent conversation's prompt cache (low cost), and is dismissed with Space/Enter/Escape. [lines 318-344] [Source]

mcp [Source]

• MCP server listing reordered and updated with new entries in the marketplace.

plugins [Source]

• Plugin development instructions updated to use /reload-plugins instead of restarting Claude Code to pick up changes. Changes to LSP server configuration still require a full restart. [lines 198, 284, 354]

sub-agents [Source]

• Added guidance to use /btw instead of a subagent when you only need a quick answer about something already in your conversation context (no tool access, answer is discarded rather than added to history). [line 676] [Source]

API changes

Changed documents

agent-sdk/python [Source]

• Internal anchor links in the API reference table updated to use kebab-case format (e.g., #sdkbeta → #sdk-beta, #canusetool → #can-use-tool) for correctness.

agent-sdk/typescript [Source]

• Internal anchor links in the API reference table updated to use kebab-case format (same pattern as Python SDK fixes).

agents-and-tools/remote-mcp-servers [Source]

• New MCP servers added to the remote server listing: Daloopa (financial fundamental data), Airtable (structured data), Close (CRM), Supermetrics (marketing analytics), Sanity (content management), Stytch (authentication), Postman (API context for agents), Gusto (HR/payroll data), Harmonic (company research), Jotform (forms), Base44 (app building), PagerDuty (incident management), Brex (finance automation).
• Various existing entries reordered within the listing.

build-with-claude/files [Source]

• Code examples updated to use $FILE_ID environment variable instead of a hardcoded example file ID, making examples easier to copy and use. [lines 67-96] [Source]
• Retrieve, delete, and download file curl examples similarly updated to use $FILE_ID. [lines 193, 206, 219]