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v2.1.186 Claude Code Release Notes

Jun 22, 2026
Claude's Analysisby Sonnet 4.6
Full Analysis

Massive stability pass: 20 fixes for background agents, permission enforcement, and session rendering. ! bash now auto-responds; claude mcp login adds headless MCP auth.

Changes
33
Total Changes (vs Average)
1.9×
Version Type
Patch
Release Focus
Bug Fixes
Days Since Prior Release
2
Release # This Month
#21 of 28
Bug Fix Ratio
61%
Post-Release Edits
—
Change Category
Ecosystem Impact
Plugins/Skills and MCP each appeared in 5 of the last 10 releases, reflecting sustained investment in the extensibility layer. This release adds 4 plugin/skill and 3 MCP items, continuing the pattern of treating extensibility as a first-class platform concern.
Key Themes
12Background Agent & Multi-Agent Overhaul|4CLI Commands & MCP Auth|4Skills & Plugin Ecosystem|13Core Stability & Behavior Changes
May Help If You've Noticed
Claude errors out with 'Content block not found' or JSON parse errors after your laptop wakes from sleep
Background agents silently deny tool permissions instead of letting you decide
Pressing Esc or Ctrl+C does nothing while background agents are finishing up
Session cost is missing on your Enterprise or Team plan
You can't authenticate MCP servers over SSH without opening a browser

Changes in Claude Code v2.1.186

Added5 changes

  • •Added claude mcp login <name> and claude mcp logout <name> to authenticate MCP servers from the CLI without opening the interactive /mcp menu, with --no-browser stdin redirect support for completing over SSH
  • •Added status filtering (press f) to the /workflows agent detail view
  • •Added a "Skills" section to the /plugin Installed tab
  • •Added teammateMode: "iterm2" setting with a warning when auto mode cannot find the it2 CLI
  • •Added "Claude Platform on AWS - refresh credentials" option to /login when awsAuthRefresh is configured

Improved4 changes

  • •Improved claude mcp get and claude mcp remove to suggest the closest configured server name on a typo and truncate long server lists
  • •Improved memory: the agent is now reminded to compact its MEMORY.md index when nearing the size limit
  • •Improved skill frontmatter: display-name, default-enabled, fallback, and metadata.* keys now accept kebab-case, snake_case, and camelCase
  • •Improved malformed SKILL.md YAML frontmatter handling: loads the skill body with empty metadata instead of failing silently

Fixed20 changes

  • •Fixed streaming requests failing with "Content block not found" or JSON parse errors after the machine wakes from sleep
  • •Fixed subagent transcript scroll position bleeding into the main transcript on exit
  • •Fixed background task previews flashing raw tool names before the agent's plan loaded
  • •Fixed Chrome tab-group isolation not applying when the in-product permissions gate is off for concurrent CLI sessions
  • •Fixed background session recaps being duplicated; the agent's own end-of-turn summary now shows as the recap line
  • •Fixed opening a background session from claude agents leaving the previous screen painted behind it
  • •Fixed Agent(type) deny rules and Agent(x,y) allowed-types restrictions not being enforced for named subagent spawns
  • •Fixed Esc and Ctrl+C not responding while background agents are still running after the main turn ends
  • •Fixed misaligned option numbers in permission prompts when the option text overflows
  • •Fixed pressing x on a finished subagent in the agent panel not dismissing it
  • •Fixed a misleading "MCP server disconnected" notice for intentionally retired tools when resuming older sessions
  • •Fixed /plugin Installed showing a "more above" indicator when already scrolled to the top
  • •Fixed ~~strikethrough~~ showing literal tildes in assistant messages instead of rendering as strikethrough
  • •Fixed --tools allowing feature-gated tools to slip through before flags loaded on a cold first launch
  • •Fixed background job status in claude agents showing a stale "needs input" message after replying
  • •Fixed a dark-theme flash when opening a background session from claude agents on a light terminal
  • •Fixed mouse-selected text staying highlighted after deleting it in claude agents
  • •Fixed session cost not showing for usage-based Enterprise and Team subscribers
  • •Fixed agent teams: teammates spawned via tmux/pane backends now inherit the leader's --effort level
  • •Fixed Workflow agent({schema}) subagents looping forever on repeated schema validation failures instead of aborting after 5 attempts

Changed3 changes

  • •Changed CLAUDE_CODE_MAX_RETRIES to cap at 15; for unattended sessions, use CLAUDE_CODE_RETRY_WATCHDOG instead
  • •Changed background subagents to surface permission prompts in the main session instead of auto-denying; the dialog shows which agent is asking, and Esc denies just that tool
  • •Changed /review <pr> to use the same review engine as /code-review medium

Other1 change

  • •! bash commands now trigger Claude to respond to the output automatically; set "respondToBashCommands": false in settings.json to keep the previous context-only behavior

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