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reopt Handbook
Claude Code Command MasterLabels and command selectionHow to read a detail guideComplete command listTerminal CLI Commands and Flags

Task guides

Core command basicsStarting and resuming workSkills and Custom CommandsAutomation and Web CommandsOperations and Safety CommandsCustom commands and skillsMCP connections and commands

Conversation and context

Cmd. /add-dirCmd. /backgroundCmd. /compactCmd. /contextCmd. /copyCmd. /exportCmd. /forkCmd. /importCmd. /initCmd. /memoryCmd. /recapCmd. /renameCmd. /resumeCmd. /rewindCmd. claude project purge

Planning and execution

Cmd. /autofix-prCmd. /batchCmd. /desktopCmd. /goalCmd. /loopCmd. /planCmd. /remote-envCmd. /scheduleCmd. /tasksCmd. /teleportCmd. /workflows

Review and verification

Cmd. /code-reviewCmd. /runCmd. /run-skill-generatorCmd. /security-reviewCmd. /simplifyCmd. /verify

Models and settings

Cmd. /claude-apiCmd. /configCmd. /effortCmd. /fastCmd. /modelCmd. /output-styleCmd. /update-config

Permissions and integrations

Cmd. /agentsCmd. /hooksCmd. /ideCmd. /mcpCmd. /permissionsCmd. /pluginCmd. /reload-pluginsCmd. /reload-skillsCmd. /sandboxCmd. /skillsCmd. /web-setup

Status and diagnostics

Cmd. /debugCmd. /diffCmd. /doctorCmd. /fewer-permission-promptsCmd. /release-notesCmd. /team-onboarding

Display and input

Cmd. /colorCmd. /focusCmd. /keybindingsCmd. /powerupCmd. /statuslineCmd. /terminal-setupCmd. /themeCmd. /tui

Account and usage

Cmd. /upgradeCmd. /usageCmd. /usage-credits

Legacy

Cmd. /costCmd. /pr-commentsCmd. /reviewCmd. /statsCmd. /ultrareviewCmd. /vimCmd. /approved-toolsCmd. /commandsCmd. /extra-usageCmd. /settingsCmd. /tagCmd. /todos

Verification and history

Current verification scopeHandbook updatesRelease coverage historyEarlier verification recordsCommand change history
Handbook›Claude Code Command Master›Earlier verification records
한국어English

Earlier verification records

Claude Code: Earlier review dates, version baselines, and findings, with a link to the current verification scope.

Key takeaways

  • This page preserves earlier review records. Use the detail guides and complete list for current behavior. Earlier minimum-version notes do not establish a newly verified introduction version.

Return to the current guide

September 22, 2026 second audit

The audit covers 239 pages across both books and languages: full command declarations, official URL destinations and anchors, internal links, and MDX compilation. Redirected documentation links now use the current destinations.

The official table now has 114 entries including /update-config. Corrections cover the retired /agents wizard, /review alias, configuration/MCP/reload/effort arguments, the /design minimum, and ultrareview billing and whole-repository fallback.

Checked 131 real external URLs (124 without fragments), with no 404s among source links. The OpenAI announcement was readable through a separate web fetch. The npm website and Claude routines console returned 403 here and remain unverified, rather than being counted as valid or broken. Reference checks do not establish account-specific runtime availability.

Running verification

Local checks validate complete declarations, CLI tables, locale coverage, and navigation against the reviewed snapshot. Live comparison fails when official names, arguments, types, descriptions, or latest releases change; source failures also fail. Behavior and availability still require editorial review.

pnpm --filter handbook check:claude-command-master
pnpm --filter handbook test:command-sources
pnpm --filter handbook check:command-sources

Official command audit — September 22, 2026

Reconciled 114 Commands entries, 34 CLI invocation forms, and 79 common CLI flags. The release baseline is v2.1.278 (September 19, 2026) in the official changelog. Older npm channel values below describe their recorded dates, not the current channels.

  • Restored /output-style [style] as a current documented command, with a reference row and usage page.

  • Added /claude-api build-eval and hillclimb (v2.1.259+), and /import cursor (v2.1.265+).

  • Added plugin install/update --accept-command <sha256> (v2.1.271), /plugin install <plugin> --marketplace <source> (v2.1.275), and runner --drain-marker-file <path> (v2.1.271).

  • Updated /config Project instructions and AGENTS.md fallback (v2.1.277), /status Auto mode server (v2.1.278), and /fast in Remote sessions (v2.1.271).

  • Added /update-config [request], corrected obsolete /agents and /review guidance, the /design minimum (v2.1.265), and CLI stream/budget details.

All slash commands · Terminal CLI reference

Sources: Commands, CLI reference, Changelog.

The sections below retain earlier update records.

Cross-checked all 112 entries in the official Commands table. Added /design and /skill-doctor to both locales and the checker. /output-style remains release-tracked.

September 12, 2026 release refresh

Updated for Claude Code v2.1.263–v2.1.269 (September 6–11). npm checked on September 12, 2026 KST: latest/next=2.1.269, stable=2.1.236. Keep latest-feature evaluation separate from a team's stable-channel rollout.

  • Plugins: claude plugin eval produces JSON and HTML evaluation reports; install, uninstall, update, enable, and disable accept --json. --plugin-dir can point to a parent directory containing multiple plugins.
  • Commands and settings: /output-style [name] works over Remote Control and in cloud/headless sessions. maxEffortLevel caps effort globally or per model under modelSettings. bashEditDiffEnabled adds file-edit diffs to Bash results.
  • Recovery and compatibility: 2.1.266 fixes forced gateway sign-in; 2.1.268 fixes HTTP 400s on Anthropic-compatible endpoints introduced in 2.1.265. /goal retries with backoff or pauses with a reason after API, network, or usage-limit failures.
  • Permissions and operations: fixes cover symlink deny/ask rules, Bash tee write boundaries, and secrets in MCP/plugin errors. WebFetch has a default 300-second deadline. /ultrareview --post posts the PR comment directly when findings arrive.

Sources: official changelog, npm dist-tags.

This refresh compares official release text with npm channels. It does not claim local CLI execution or live feature testing. Tables below retain prior dated checks; the channel values above supersede them.

Source Baseline

Checked on 2026-09-05 against:

  • Claude Fable 5.1 overview: https://platform.claude.com/docs/en/models/fable-5-1/overview

  • What's new in Claude Fable 5.1: https://platform.claude.com/docs/en/models/fable-5-1/whats-new-fable-5-1

  • Migrating to Claude Fable 5.1: https://platform.claude.com/docs/en/models/fable-5-1/migration-guide

  • Fable 5.1 and Mythos 5.1 announcement: https://www.anthropic.com/claude-fable-and-mythos-5-1

  • Official Commands reference: https://code.claude.com/docs/en/commands

  • Official CLI reference: https://code.claude.com/docs/en/cli-reference

  • Official Changelog: https://code.claude.com/docs/en/changelog

  • Official Model configuration: https://code.claude.com/docs/en/model-config

  • Official Agent View guide: https://code.claude.com/docs/en/agent-view

  • Official Skills guide: https://code.claude.com/docs/en/skills

  • Official Fast mode guide: https://code.claude.com/docs/en/fast-mode

  • Official Routines guide: https://code.claude.com/docs/en/routines

  • Claude Fable 5 and Claude Mythos 5: https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5

  • Fable refusals and fallback: https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback

  • Fable fallback credit: https://platform.claude.com/docs/en/build-with-claude/fallback-credit

  • Prompting Claude Fable 5: https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-fable-5

  • Usage credits: https://support.claude.com/en/articles/12429409-manage-usage-credits-for-paid-claude-plans

  • Claude Sonnet 5 announcement: https://www.anthropic.com/news/claude-sonnet-5

  • Claude models overview: https://platform.claude.com/docs/en/models/overview

  • Claude Opus 4.8 announcement: https://www.anthropic.com/news/claude-opus-4-8

  • npm package: https://www.npmjs.com/package/@anthropic-ai/claude-code

Locale Checks

  • /en/books/claude-code-command-master renders English content only.
  • The English root meta registers claude-code-command-master.
  • Home preview chapters are loaded with locale=en.
  • Unsupported English books remain translation requests instead of falling back to Korean content.
  • The locale switcher should allow English for this book once the page exists in both locales.

Editorial Checks

AreaStatus
Cover metadataComplete
Command catalogComplete
Core command groupingComplete
Skills/custom commandsComplete
Web automation commandsComplete
Operations and safety commandsComplete
Official Commands inventoryComplete: all 110 rows in both locale reference pages
Update logComplete

Current Baseline Checks

AreaBaseline
Claude Code versionv2.1.261 latest and next; v2.1.236 stable
v2.1.252–261 changesFable 5.1 as default Fable (v2.1.257), gateway aliases kept on Fable 5, /effort session-only s, CLAUDE_CODE_SUBAGENT_MODEL_FORCE, the v2.1.260 fullscreen /diff panel, Fable 5.1 picker/prompt-cache/[1m] fixes, and 1M auto-compact timing. /skill-doctor, managedMcpServers, and --permission-prompts none are changelog-only so far and stay out of the 110-row reference
Fable 5.1Released 2026-09-01 as claude-fable-5-1; Claude Code v2.1.255+; same pricing as Fable 5 with $0.25/MTok cache reads; not default on any plan; Fable 5 via /model claude-fable-5
Fable 5.1 API deltasForced tool_choice returns 400; thinking blocks bound to Fable 5.1; editing earlier turns invalidates thinking (enforced for accounts created on/after 2026-08-31); per-message effort, clear_at, display: "updates", and provenance are additive
Classifier fallback tableFable 5.1/5 biology to Opus 5, cybersecurity to Opus 4.8; Opus 5 cybersecurity to Opus 4.8, biology refused; switchModelsOnFlag: false; third-party needs ANTHROPIC_DEFAULT_OPUS_MODEL
Mythos 5.1Same specs and pricing as Fable 5.1 with a different safeguard level; Project Glasswing approved customers only; not selectable via /model
Fast modeOpus 5 and Opus 4.8 only; Fable 5.1 and Fable 5 unsupported; Opus 4.7 fast mode removed 2026-07-24
v2.1.248–251 changesModel-switch hooks, usage and prompt-cache telemetry, restricted mode, background-session CLI, workflow authoring, symlink/path hardening, and agent/Remote Control reliability
v2.1.239–247 changesPer-loop usage, Auto-mode rules, Claude API upgrade/cost optimization, feedback drafts, partial subagent continuation, headless recovery, and security hardening
v2.1.221–237 changesInteractive fork/background spawn, cross-session messaging, self-hosted runner, GitLab MR, default model, Concise output, security and reliability fixes
Default model envANTHROPIC_DEFAULT_MODEL is a low-precedence new-session default from v2.1.236
Task/Todo toolsDisabled by default on newer models from v2.1.233; compatibility flag documented
v2.1.206–220 changesOpus 5; /fork//subtask split; manual-only review/verify; forked-skill background default; agent limits; sandbox, hooks, and headless MCP-error updates
v2.1.202–205 changesWorkflow sizing/OTel, fast /review split, Agent View/background/MCP roots, headless hook streaming, full /doctor checkup, Auto-mode and JSON Schema fixes
v2.1.198–201 changesSubagents background-by-default (v2.1.198), /dataviz skill, Claude in Chrome GA, default permission mode renamed "Manual" (v2.1.200), Sonnet 5 mid-conversation system role removed (v2.1.201)
Fable path (history)Fable 5 on Claude Code v2.1.170+ (released June 9, 2026); fable resolved to Fable 5 before v2.1.255 and to Fable 5.1 afterwards; never the default
Fable 5 redeploymentSuspended 2026-06-12 under US export controls; restored globally 2026-07-01 with an improved safety classifier. Mythos 5 (no classifiers) is Project Glasswing invitation-only and not selectable via /model
Fable plan accessTemporary subscription allowance ended 2026-07-07; current Pro/Max/Team and seat-based Enterprise access requires usage credits, while API consumption is billed separately
Fable API refusalHTTP 200 with stop_reason: "refusal"; monitor it separately from transport and HTTP errors
Fable API fallbackServer-side fallbacks, SDK middleware, and manual retry documented separately from Claude Code availability fallback
Fallback billingPre-output refusals are not billed; fallback credit avoids duplicate prompt-cache write cost on a model switch
Fable promptingAvoid internal-reasoning extraction instructions; use concise rationale and structured adaptive-thinking blocks
Sonnet pathSonnet 5 on Claude Code v2.1.197+; default for Pro, Team Standard, and Enterprise subscription seats
Latest Opus pathOpus 5 with native 1M context on Claude Code v2.1.219+
Anthropic API aliasesfable → Fable 5.1 (v2.1.255+), best → latest Fable when available otherwise latest Opus, opus → Opus 5, sonnet → Sonnet 5; Claude apps gateway sessions keep fable/best on Fable 5
Recent command deltas/advisor accepts fable; /cd relocates the session and storage; --safe-mode isolates customization while keeping auth/model/permissions
Model fallbackFable classifier fallback to Opus; fallbackModel chains for availability failures
Skill controls--disable-slash-commands; disableBundledSkills; CLAUDE_CODE_DISABLE_BUNDLED_SKILLS
CI reliabilitySelf-hosted runner post-session hook; v2.1.170 transcript persistence fix for VS Code integrated terminals and inherited Claude Code env vars
Background workAgent View, /background//bg, claude --bg, claude --bg --exec
Dynamic work/goal and /workflows
Usage continuation/usage-credits; /extra-usage treated as legacy
Review split/code-review for correctness, /simplify for cleanup
MCP operationsclaude mcp login/logout; CLAUDE_CODE_MCP_TOOL_IDLE_TIMEOUT
Sandbox operationssandbox.credentials, sandbox.network.strictAllowlist, sandbox.filesystem.disabled, destructive-command and Windows fixes
Agent limitsThree-level nesting and 20 concurrent by default; old 200-per-session total removed in v2.1.224
Model warningsMain model restriction notes and stronger deprecated-model warnings

Coverage Model

The English edition groups detailed guidance by workflow instead of translating every Korean detail page one-to-one. Coverage is still exhaustive at the inventory level: the complete command reference contains all 114 official Commands rows checked on 2026-09-22, including the removed entries retained in the source table.

Related docs

Verification Report

Claude Code Complete Guide · Verification checklist for the English Claude Code handbook locale.

Cmd. /model

Saves the selected model as the default for new sessions. Press s on a picker row, or use a supported -p invocation, for a session-only change.

Claude Code Complete Guide

A practical guide to multi-session workflows, automation, and extension patterns in Claude Code.

Plan and Environment Setup

Claude Code Complete Guide · Prepare Claude Code plans, installation, update policy, and a safe repository baseline.

Update Log

Claude Code Complete Guide · English edition changes for the Claude Code Complete Guide.

Release coverage history

Claude Code: Dated release coverage and handbook update decisions, preserved separately from current instructions.

Command change history

Claude Code: Earlier command-version evidence and behavior changes, with links back to current detail guides.

On this page

September 22, 2026 second auditRunning verificationOfficial command audit — September 22, 2026September 12, 2026 release refreshSource BaselineLocale ChecksEditorial ChecksCurrent Baseline ChecksCoverage Model