6 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.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 8 

9Releases [v2.1.150 → v2.1.157](/docs/en/changelog#2-1-150)9Releases [v2.1.150 → v2.1.157](/docs/en/changelog.md#2-1-150)

104 features · May 25–29104 features · May 25–29

11 11 

12Claude Opus 4.812Claude Opus 4.8

22/model claude-opus-4-822/model claude-opus-4-8

23```23```

24 24 

25[Model configuration](/docs/en/model-config#available-models)25[Model configuration](/docs/en/model-config.md#available-models)

26 26 

27Dynamic workflows27Dynamic workflows

28research preview28research preview

37create a workflow that migrates every internal fetch() call to the new HttpClient wrapper37create a workflow that migrates every internal fetch() call to the new HttpClient wrapper

38```38```

39 39 

40[Dynamic workflows](/docs/en/workflows)40[Dynamic workflows](/docs/en/workflows.md)

41 41 

42Security guidance plugin42Security guidance plugin

43plugin43plugin

58/reload-plugins58/reload-plugins

59```59```

60 60 

61[Security guidance plugin](/docs/en/security-guidance)61[Security guidance plugin](/docs/en/security-guidance.md)

62 62 

63Fast mode on Opus 4.863Fast mode on Opus 4.8

64research preview64research preview

71/fast71/fast

72```72```

73 73 

74[Fast mode pricing](/docs/en/fast-mode#understand-the-cost-tradeoff)74[Fast mode pricing](/docs/en/fast-mode.md#understand-the-cost-tradeoff)

75 75 

76Other wins76Other wins

77 77 

78In `claude agents`, prefix a shell command with `!` to run it as a background job you can attach to and detach from; also available as `claude --bg --exec 'pytest -x'`Plugins in `.claude/skills` directories are now loaded automatically, no marketplace required, and `claude plugin init <name>` scaffolds a new pluginNew `/reload-skills` command re-scans skill directories without restarting, and `SessionStart` hooks can return `reloadSkills: true` to make skills they install available in the same sessionSkills and commands can set `disallowed-tools` in frontmatter to remove tools from the model while the skill is activeNew `MessageDisplay` hook event lets hooks transform or hide assistant message text as it is displayedClaude Code now switches to your configured `--fallback-model` for the rest of the session when the primary model is not found, instead of failing every requestPlugins can declare `defaultEnabled: false` in `plugin.json` or a marketplace entry, so they install without turning on until you enable themVim mode: `/` in NORMAL mode opens reverse history search, matching Bash and Zsh vi-modeStreaming tool execution is now always enabled, including with telemetry disabled and on Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry`←←` to open the agents view now works on Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and with telemetry disabledClaude in Chrome: pick which connected browser to use via `/chrome` → "Select browser…", or in-chat when a browser action runs with multiple connected`claude mcp list` and `claude mcp get` now show unapproved `.mcp.json` servers as pending approval instead of auto-approving and connecting when output is piped78In `claude agents`, prefix a shell command with `!` to run it as a background job you can attach to and detach from; also available as `claude --bg --exec 'pytest -x'`Plugins in `.claude/skills` directories are now loaded automatically, no marketplace required, and `claude plugin init <name>` scaffolds a new pluginNew `/reload-skills` command re-scans skill directories without restarting, and `SessionStart` hooks can return `reloadSkills: true` to make skills they install available in the same sessionSkills and commands can set `disallowed-tools` in frontmatter to remove tools from the model while the skill is activeNew `MessageDisplay` hook event lets hooks transform or hide assistant message text as it is displayedClaude Code now switches to your configured `--fallback-model` for the rest of the session when the primary model is not found, instead of failing every requestPlugins can declare `defaultEnabled: false` in `plugin.json` or a marketplace entry, so they install without turning on until you enable themVim mode: `/` in NORMAL mode opens reverse history search, matching Bash and Zsh vi-modeStreaming tool execution is now always enabled, including with telemetry disabled and on Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry`←←` to open the agents view now works on Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and with telemetry disabledClaude in Chrome: pick which connected browser to use via `/chrome` → "Select browser…", or in-chat when a browser action runs with multiple connected`claude mcp list` and `claude mcp get` now show unapproved `.mcp.json` servers as pending approval instead of auto-approving and connecting when output is piped

79 79 

80[Full changelog for v2.1.150–v2.1.157 →](/docs/en/changelog#2-1-150)80[Full changelog for v2.1.150–v2.1.157 →](/docs/en/changelog.md#2-1-150)