Update Log

2026-06-25

• Updated the English handbook baseline to Claude Code v2.1.190 after checking the official changelog and npm dist-tags (latest=2.1.190, stable=2.1.179).
• Added v2.1.181~v2.1.190 operating notes for sandbox.credentials, destructive-command sandbox auto-approval, Windows PowerShell sandbox fixes, MCP login/logout, MCP idle timeout, misleading MCP status fixes, non-interactive fallback reliability, output-schema determinism, Korean paste handling, and app/schema bug fixes.
• Refreshed model guidance for model restriction and deprecation-warning behavior: main model restrictions center on Opus/Sonnet/Haiku/Fable families, Haiku remains subagent-only for this path, and deprecated models should trigger warnings.
• Refreshed subagent/background guidance for the three-level nesting cap, nested-agent stability, Agent deny rules, and background permission-prompt handling.

2026-06-13

• Fixed English locale internal links so they no longer leak to the Korean edition: the cross-references to the subagents chapter (in the context page) and the plan-mode chapter (in the multi-session page) now point to /en/books/... instead of bare /books/....
• Editorial review pass with no content, model, or policy changes for this handbook.

2026-06-10

• Updated the English handbook baseline to Claude Code v2.1.170 and Claude Fable 5.
• Added fable and best alias guidance, including the fact that Fable 5 is not the default and requires v2.1.170 or later.
• Documented Fable-specific automatic fallback to Opus, --safe-mode troubleshooting, Fable data-retention/thinking constraints, and ANTHROPIC_DEFAULT_FABLE_MODEL.
• Added fallbackModel chain guidance for overload or availability failures before long autonomous sessions.
• Added detailed v2.1.169 operating notes for /cd, self-hosted runner post-session hooks, and bundled skill/workflow disabling.
• Added the v2.1.170 transcript persistence fix for sessions launched from VS Code integrated terminals or shells inheriting Claude Code environment variables.
• Kept Opus 4.8 as the default high-capability Opus path and clarified when to use Fable, Opus, Sonnet, and Haiku.

2026-05-29

• Updated the English handbook baseline to Claude Code v2.1.154 and Claude Opus 4.8.
• Added current model alias guidance: Anthropic API, Claude Platform on AWS, and Bedrock/Vertex/Foundry resolve opus and sonnet differently.
• Documented /model default-saving behavior, resumed-session model preservation, and full model name pinning for reproducible work.
• Added Agent View, background sessions, claude --bg --exec, dynamic workflows, /goal, and /workflows to the operating model.
• Added current command guidance for /usage-credits, /reload-skills, /run, /verify, /run-skill-generator, /code-review, and the updated /simplify role.
• Added headless notes for --session-id, background-session automation, app-level verification, and nonessential-traffic controls.

2026-05-05

• Added the first English locale handbook: Claude Code Complete Guide.
• Registered claude-code-advanced under the English content tree.
• Documented the expected behavior for unsupported English handbook routes.
• Added English titles, descriptions, chapter labels, and internal links.

Editorial Policy

The English edition is localized by book, not by global fallback. A book becomes available in English only when its English content tree is present and registered.

This prevents Korean content from appearing under English URLs and keeps search, sitemap, home, and preview behavior aligned with actual content availability.