Documentation Index
Fetch the complete documentation index at: https://code.claude.com/docs/llms.txt
Use this file to discover all available pages before exploring further.
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 /effort xhigh for harder tasks. Requires v2.1.154 or later.
Switch to Opus 4.8 by name, or pick it from the model picker:
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 /workflows.
Describe the task and include the word workflow:
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 .claude/claude-security-guidance.md.
Install it from the official Anthropic marketplace:
Then activate it in the current session:
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.
Toggle fast mode, now on Opus 4.8:
Other wins
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’.claude/skills directories are now loaded automatically, no marketplace required, and claude plugin init <name> scaffolds a new plugin/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 sessiondisallowed-tools in frontmatter to remove tools from the model while the skill is activeMessageDisplay hook event lets hooks transform or hide assistant message text as it is displayed—fallback-model for the rest of the session when the primary model is not found, instead of failing every requestdefaultEnabled: false in plugin.json or a marketplace entry, so they install without turning on until you enable them/ in NORMAL mode opens reverse history search, matching Bash and Zsh vi-mode←← to open the agents view now works on Bedrock, Vertex, Foundry, and with telemetry disabled/chrome → “Select browser…”, or in-chat when a browser action runs with multiple connectedclaude 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