Claude docs changes for January 19th, 2026 [diff]

Executive Summary

Clarified permission rule syntax for --allowedTools flag and Bash(*) vs Bash matching behavior
New MCP server integrations added: Gamma, Guru, Klaviyo, Wix, Port IO, and Hex
Comprehensive 'Permission rule syntax' section added to settings documentation

The --allowedTools flag description now references the permission rule syntax documentation for pattern matching details. [line 25] [Source]

Added explanation that --allowedTools flag uses permission rule syntax, with :* suffix enabling prefix matching for command patterns. [lines 115-116] [Source]

Clarified rule evaluation order: deny rules are checked first, then ask, then allow rules, with the first match winning. [line 72] [Source]
Added note that Bash(*) does not match all Bash commands; use Bash without parentheses to match all uses. [line 78] [Source]
Added reference to permission rule syntax documentation in settings for wildcard patterns. [line 80] [Source]

Added Gamma MCP server for creating presentations, docs, socials, and sites. [lines 109-112] [Source]
Fixed Atlassian MCP server URL from /v1/sse to /v1/mcp. [line 153] [Source]
Added Guru MCP server for searching and interacting with company knowledge. [lines 259-262] [Source]
Added Klaviyo MCP server for reporting, strategizing, and creating with real-time Klaviyo data. [lines 299-302] [Source]
Added Wix MCP server for managing and building sites and apps on Wix. [lines 397-400] [Source]
Added Port IO MCP server for searching context lake and safely running actions. [lines 459-462] [Source]
Added Hex MCP server entry with public URL for answering questions with Hex agent. [lines 491-494] [Source]

Added comprehensive "Permission rule syntax" section documenting rule evaluation order, matching all uses of a tool, using specifiers, and wildcard patterns. [lines 177-265] [Source]
Updated permission settings table to reference the new permission rule syntax section. [lines 170-172] [Source]
Updated "See also" section to include more specific references to IAM documentation sections. [lines 1021-1023] [Source]

Added Gamma MCP server for creating presentations, docs, socials, and sites. [lines 111-116] [Source]
Added Guru MCP server for searching and interacting with company knowledge. [lines 313-318] [Source]
Added Klaviyo MCP server for reporting, strategizing, and creating with real-time Klaviyo data. [lines 399-404] [Source]
Added Wix MCP server for managing and building sites and apps on Wix. [lines 555-560] [Source]
Added Port IO MCP server for searching context lake and safely running actions. [lines 643-648] [Source]
Added Hex MCP server entry with public URL for answering questions with Hex agent. [lines 695-700] [Source]

Changed contact link for full thinking output access from email protection link to direct sales email. [line 98] [Source]

Changed contact link from direct sales email to email protection link for requesting higher rate limits. [line 284] [Source]