1> ## Documentation Index

2> Fetch the complete documentation index at: https://code.claude.com/docs/llms.txt

3> Use this file to discover all available pages before exploring further.

4 

5# Week 22 · May 25–29, 2026

6 

7> Run Claude Code on Claude Opus 4.8, orchestrate large tasks with dynamic workflows, catch security issues with the security-guidance plugin, and use fast mode on Opus 4.8 at a lower price.

8 

9<div className="digest-meta">

10 <span>Releases <a href="/en/changelog#2-1-150">v2.1.150 → v2.1.157</a></span>

11 <span>4 features · May 25–29</span>

12</div>

13 

14<div className="digest-feature">

15 <div className="digest-feature-header">

16 <span className="digest-feature-title">Claude Opus 4.8</span>

17 <span className="digest-feature-pill">new model</span>

18 </div>

19 

20 <p className="digest-feature-lede">Opus 4.8 is now the default on Max, Team Premium, Enterprise pay-as-you-go, and the Anthropic API. It defaults to high effort; use <code>/effort xhigh</code> for harder tasks. Requires v2.1.154 or later.</p>

21 

22 <Frame>

23 <video autoPlay muted loop playsInline className="w-full" src="https://mintcdn.com/claude-code/QsIrGXGFg6xd7joy/images/whats-new/opus-4-8.mp4?fit=max&auto=format&n=QsIrGXGFg6xd7joy&q=85&s=6ebcf5fe136467da2b254de1fe749ea7" data-path="images/whats-new/opus-4-8.mp4" />

24 </Frame>

25 

26 <p className="digest-feature-try">Switch to Opus 4.8 by name, or pick it from the model picker:</p>

27 

28 ```text Claude Code theme={null}

29 > /model claude-opus-4-8

30 ```

31 

32 <a className="digest-feature-link" href="/en/model-config#available-models">Model configuration</a>

33</div>

34 

35<div className="digest-feature">

36 <div className="digest-feature-header">

37 <span className="digest-feature-title">Dynamic workflows</span>

38 <span className="digest-feature-pill">research preview</span>

39 </div>

40 

41 <p className="digest-feature-lede">A workflow is an orchestration script Claude writes for your task and runs across many subagents in the background. Use one when a task is too large for one conversation to coordinate: a codebase-wide audit, a large migration, a research question that needs cross-checking. Manage runs with <code>/workflows</code>.</p>

42 

43 <Frame>

44 <img className="w-full" src="https://mintcdn.com/claude-code/QsIrGXGFg6xd7joy/images/whats-new/dynamic-workflows.png?fit=max&auto=format&n=QsIrGXGFg6xd7joy&q=85&s=26671fa8607cec3453ed9753f821bd4f" alt="Claude Code on Opus 4.8 showing a Dynamic workflow requested indicator for a prompt that asks for a workflow to migrate every internal fetch() call" width="3840" height="2160" data-path="images/whats-new/dynamic-workflows.png" />

45 </Frame>

46 

47 <p className="digest-feature-try">Describe the task and include the word workflow:</p>

48 

49 ```text Claude Code theme={null}

50 > create a workflow that migrates every internal fetch() call to the new HttpClient wrapper

51 ```

52 

53 <a className="digest-feature-link" href="/en/workflows">Dynamic workflows</a>

54</div>

55 

56<div className="digest-feature">

57 <div className="digest-feature-header">

58 <span className="digest-feature-title">Security guidance plugin</span>

59 <span className="digest-feature-pill">plugin</span>

60 </div>

61 

62 <p className="digest-feature-lede">The security-guidance plugin reviews Claude's code changes for vulnerabilities and fixes them in the same session. It runs a fast pattern check on each edit, a model review at the end of each turn, and a deeper agentic review on commit or push. Add project rules in <code>.claude/claude-security-guidance.md</code>.</p>

63 

64 <Frame>

65 <video autoPlay muted loop playsInline className="w-full" src="https://mintcdn.com/claude-code/QsIrGXGFg6xd7joy/images/whats-new/security-guidance.mp4?fit=max&auto=format&n=QsIrGXGFg6xd7joy&q=85&s=c91d865936411586f42b24c558bcdd1d" data-path="images/whats-new/security-guidance.mp4" />

66 </Frame>

67 

68 <p className="digest-feature-try">Install it from the official Anthropic marketplace:</p>

69 

70 ```text Claude Code theme={null}

71 > /plugin install security-guidance@claude-plugins-official

72 ```

73 

74 <p className="digest-feature-try">Then activate it in the current session:</p>

75 

76 ```text Claude Code theme={null}

77 > /reload-plugins

78 ```

79 

80 <a className="digest-feature-link" href="/en/security-guidance">Security guidance plugin</a>

81</div>

82 

83<div className="digest-feature">

84 <div className="digest-feature-header">

85 <span className="digest-feature-title">Fast mode on Opus 4.8</span>

86 <span className="digest-feature-pill">research preview</span>

87 </div>

88 

89 <p className="digest-feature-lede">Fast mode now defaults to Opus 4.8 at \$10/\$50 per MTok: 2x the standard rate for about 2.5x the speed. Opus 4.7 and 4.6 stay at \$30/\$150. Opus 4.6 fast mode is deprecated.</p>

90 

91 <p className="digest-feature-try">Toggle fast mode, now on Opus 4.8:</p>

92 

93 ```text Claude Code theme={null}

94 > /fast

95 ```

96 

97 <a className="digest-feature-link" href="/en/fast-mode#understand-the-cost-tradeoff">Fast mode pricing</a>

98</div>

99 

100<div className="digest-wins">

101 <p className="digest-wins-title">Other wins</p>

102 

103 <div className="digest-wins-grid">

104 <div>In <code>claude agents</code>, prefix a shell command with <code>!</code> to run it as a background job you can attach to and detach from; also available as <code>claude --bg --exec 'pytest -x'</code></div>

105 <div>Plugins in <code>.claude/skills</code> directories are now loaded automatically, no marketplace required, and <code>claude plugin init \<name></code> scaffolds a new plugin</div>

106 <div>New <code>/reload-skills</code> command re-scans skill directories without restarting, and <code>SessionStart</code> hooks can return <code>reloadSkills: true</code> to make skills they install available in the same session</div>

107 <div>Skills and commands can set <code>disallowed-tools</code> in frontmatter to remove tools from the model while the skill is active</div>

108 <div>New <code>MessageDisplay</code> hook event lets hooks transform or hide assistant message text as it is displayed</div>

109 <div>Claude Code now switches to your configured <code>--fallback-model</code> for the rest of the session when the primary model is not found, instead of failing every request</div>

110 <div>Plugins can declare <code>defaultEnabled: false</code> in <code>plugin.json</code> or a marketplace entry, so they install without turning on until you enable them</div>

111 <div>Vim mode: <code>/</code> in NORMAL mode opens reverse history search, matching Bash and Zsh vi-mode</div>

112 <div>Streaming tool execution is now always enabled, including with telemetry disabled and on Bedrock, Vertex, and Foundry</div>

113 <div><code>←←</code> to open the agents view now works on Bedrock, Vertex, Foundry, and with telemetry disabled</div>

114 <div>Claude in Chrome: pick which connected browser to use via <code>/chrome</code> → "Select browser…", or in-chat when a browser action runs with multiple connected</div>

115 <div><code>claude mcp list</code> and <code>claude mcp get</code> now show unapproved <code>.mcp.json</code> servers as pending approval instead of auto-approving and connecting when output is piped</div>

116 </div>

117</div>

118 

119[Full changelog for v2.1.150–v2.1.157 →](/en/changelog#2-1-150)