An entry is only as true as the day it was written.
Flags move on the server after a release ships. Anthropic's own notes land days later and their documentation later still. Sometimes an entry turns out to be wrong and gets corrected by hand. All of that is recorded against the entry it happened to, and this is the whole of it in the order it happened.
Nothing here replaces an entry. Every line links to the page its release published, still saying what that release said, because a correction is added and dated rather than swapped in.
| When | Entry | What happened |
|---|---|---|
v2.1.280AGENTS.md |
Documentation arrivedA small documentation edit on Glossary touched a line naming AGENTS.md after this was published.
the line in the docsA markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … |
|
v2.1.277AGENTS.md |
Documentation arrivedA small documentation edit on Glossary touched a line naming AGENTS.md after this was published.
the line in the docsA markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … |
|
v2.1.277AGENTS.md |
Documentation arrivedA small documentation edit on Glossary touched a line naming AGENTS.md after this was published.
the line in the docsA markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … |
|
v2.1.277AGENTS.md |
Documentation arrivedA small documentation edit on Glossary touched a line naming AGENTS.md after this was published.
the line in the docsA markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … |
|
v2.1.280/config |
Documentation arrivedA small documentation edit on Glossary touched a line naming /config after this was published.
the line in the docsA markdown file of project instructions you write for AI coding agents. If your repository has one and no [CLAUDE.md](#claude-md), Claude reads it as your project instructions without you adding a second file. You can change the **Project … |
|
v2.1.280claude.ai/code |
Documentation arrivedAnthropic's documentation has since written up claude.ai/code, on Claude Code changelog.
the line in the docs* \[VSCode] Fixed a claude.ai/code session opening empty or with only part of its conversation, with no error, when the server failed to return its history, part of it failed to load, or a network sign-in page answered in its place; it now… |
|
v2.1.278CLAUDE_CODE_AUTO_MODE_SERVER |
Documentation arrivedAnthropic's documentation has since written up CLAUDE_CODE_AUTO_MODE_SERVER, on Claude Code changelog.
the line in the docs* Changed `CLAUDE_CODE_AUTO_MODE_SERVER` to also apply on a direct Anthropic API connection: `0` opts out of the server-side auto mode classifier (the local classifier then counts toward usage), `1` opts in |
|
v2.1.280/diff |
Documentation arrivedAnthropic's documentation has since written up /diff, on Claude Code changelog.
the line in the docs* Improved `/diff`: a scrollbar shows where you are in a long list of changed files, and long paths no longer wrap their rows |
|
v2.1.280Home |
Documentation arrivedAnthropic's documentation has since written up Home, on Claude Code changelog.
the line in the docs* Improved the `/workflows` and `/mcp` lists: they page (PgUp/PgDn, Home/End) and take j/k and the mouse like other lists, their arrows follow `select:previous`/`select:next` rebinds, and `x` in `/workflows` stops the run the pointer is on |
|
v2.1.280Home |
Documentation arrivedAnthropic's documentation has since written up Home, on Claude Code changelog.
the line in the docs* Improved the `/workflows` and `/mcp` lists: they page (PgUp/PgDn, Home/End) and take j/k and the mouse like other lists, their arrows follow `select:previous`/`select:next` rebinds, and `x` in `/workflows` stops the run the pointer is on |
|
v2.1.280Home |
Documentation arrivedAnthropic's documentation has since written up Home, on Claude Code changelog.
the line in the docs* Improved the `/workflows` and `/mcp` lists: they page (PgUp/PgDn, Home/End) and take j/k and the mouse like other lists, their arrows follow `select:previous`/`select:next` rebinds, and `x` in `/workflows` stops the run the pointer is on |
|
v2.1.280/usage |
Documentation arrivedAnthropic's documentation has since written up /usage, on Claude Code changelog.
the line in the docs* Improved keyboard navigation in tabbed dialogs such as `/permissions` and `/usage`: ↑/↓ move focus between the tab row and the content, and a list responds to keys only while it has focus |
|
v2.1.265WorktreeCreate |
Documentation arrivedAnthropic's documentation has since written up WorktreeCreate, on Claude Code changelog.
the line in the docs* Improved `/batch` to run where a WorktreeCreate hook provides the agent worktrees, not only inside a git repository |
|
v2.1.265WorktreeCreate |
Documentation arrivedAnthropic's documentation has since written up WorktreeCreate, on Claude Code changelog.
the line in the docs* Improved `/batch` to run where a WorktreeCreate hook provides the agent worktrees, not only inside a git repository |
|
v2.1.265WorktreeCreate |
Documentation arrivedAnthropic's documentation has since written up WorktreeCreate, on Claude Code changelog.
the line in the docs* Improved `/batch` to run where a WorktreeCreate hook provides the agent worktrees, not only inside a git repository |
|
v2.1.248/heapdump |
Documentation arrivedAnthropic's documentation has since written up /heapdump, on Claude Code changelog.
the line in the docs* Fixed `/heapdump` summary saying most memory is native when it is in the JS heap snapshot |
|
v2.1.280/install-github-app |
Documentation arrivedAnthropic's documentation has since written up /install-github-app, on Claude Code changelog.
the line in the docs* Fixed keys that arrive in one burst of input (e.g. over Remote Control), such as an arrow key followed by Enter, `x` or `s`, acting on the previous selection: a stale effort level in `/effort` and the model picker, and the previously hig… |
|
v2.1.280Esc |
Documentation arrivedAnthropic's documentation has since written up Esc, on Claude Code changelog.
the line in the docs* Fixed Ctrl+C or Ctrl+D pressed twice quitting Claude Code instead of closing the dialog in the remaining dialogs and pickers, such as `/memory`, `/hooks`, `/mcp` (including a server's sign-in screen), `/export`, `/copy`, `/theme`, and `/… |
|
v2.1.280Esc |
Documentation arrivedAnthropic's documentation has since written up Esc, on Claude Code changelog.
the line in the docs* Fixed Ctrl+C or Ctrl+D pressed twice quitting Claude Code instead of closing the dialog in the remaining dialogs and pickers, such as `/memory`, `/hooks`, `/mcp` (including a server's sign-in screen), `/export`, `/copy`, `/theme`, and `/… |
|
v2.1.280/memory |
Documentation arrivedAnthropic's documentation has since written up /memory, on Claude Code changelog.
the line in the docs* Fixed Ctrl+C or Ctrl+D pressed twice quitting Claude Code instead of closing the dialog in the remaining dialogs and pickers, such as `/memory`, `/hooks`, `/mcp` (including a server's sign-in screen), `/export`, `/copy`, `/theme`, and `/… |
|
v2.1.274CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE |
Documentation arrivedAnthropic's documentation has since written up CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE, on Claude Code changelog.
the line in the docs* Fixed `known_marketplaces.json` recording a marketplace as refreshed when its remote could not be reached and `CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE` kept the existing clone |
|
v2.1.280--plugin-dir |
Documentation arrivedAnthropic's documentation has since written up --plugin-dir, on Claude Code changelog.
the line in the docs* Fixed `--plugin-dir` on a folder of plugins that also has a `.claude-plugin/marketplace.json` loading one empty plugin instead of the plugins in it |
|
v2.1.280claude remote-control |
Documentation arrivedAnthropic's documentation has since written up claude remote-control, on Claude Code changelog.
the line in the docs* Fixed the Artifact tool missing from Remote Control sessions that `claude remote-control` starts for you to open from Claude Desktop, claude.ai or the mobile app |
|
v2.1.277notices |
Documentation arrivedAnthropic's documentation has since written up notices, on Claude Code changelog.
the line in the docs* Fixed scheduled routine and notification turns in remote sessions not receiving turn-start notices (newly available tools, MCP changes, date, todos) until after the first tool call |
|
v2.1.277notices |
Documentation arrivedAnthropic's documentation has since written up notices, on Claude Code changelog.
the line in the docs* Fixed scheduled routine and notification turns in remote sessions not receiving turn-start notices (newly available tools, MCP changes, date, todos) until after the first tool call |
|
v2.1.280worktree |
Documentation arrivedAnthropic's documentation has since written up worktree, on Claude Code changelog.
the line in the docs* Fixed `--setting-sources` (and SDK `settingSources`) not being forwarded to spawned sessions: teammates, `/bg`, `claude agents` sessions and `--worktree --tmux` now start with the parent's restriction |
|
v2.1.280worktree |
Documentation arrivedAnthropic's documentation has since written up worktree, on Claude Code changelog.
the line in the docs* Fixed `--setting-sources` (and SDK `settingSources`) not being forwarded to spawned sessions: teammates, `/bg`, `claude agents` sessions and `--worktree --tmux` now start with the parent's restriction |
|
v2.1.280/skills |
Documentation arrivedAnthropic's documentation has since written up /skills, on Claude Code changelog.
the line in the docs* Added a scrollbar to the `/skills`, `/mcp` and `/plugin` Installed lists in fullscreen mode, like the one `/workflows` now has: it appears while the mouse is over the list and can be clicked or dragged |
|
v2.1.280blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.273blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.273blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.273blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.273blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.273blockReadsOutsideWorkingDirectories |
Documentation arrivedAnthropic's documentation has since written up blockReadsOutsideWorkingDirectories, on Claude Code changelog.
the line in the docs* Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` |
|
v2.1.280/fast |
Documentation arrivedAnthropic's documentation has since written up /fast, on overview.
the line in the docs* [Fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) (research preview) is available for Claude Opus 5.5 on the Claude API. |
|
v2.1.280prefix_mismatch_behavior |
Documentation arrivedAnthropic's documentation has since written up prefix_mismatch_behavior, on Or, for the Project Glasswing model with the same capabilities:.
the line in the docsprefix_mismatch_behavior: drop_block |
|
v2.1.280/config |
Documentation arrivedAnthropic's documentation has since written up /config, on files.
the line in the docsmount_path: /config.json |
|
v2.1.280claude-opus-5-5 |
Documentation arrivedA small documentation edit on API usage primer for Claude touched a line naming claude-opus-5-5 after this was published.
the line in the docs* Claude Opus 5.5 (`claude-opus-5-5`, adaptive thinking only, always on) |
|
v2.1.280claude-opus-5-5 |
Documentation arrivedA small documentation edit on API usage primer for Claude touched a line naming claude-opus-5-5 after this was published.
the line in the docs* Claude Opus 5.5 (`claude-opus-5-5`, adaptive thinking only, always on) |
|
v2.1.280claude-opus-5-5 |
Documentation arrivedA small documentation edit on API usage primer for Claude touched a line naming claude-opus-5-5 after this was published.
the line in the docs* Claude Opus 5.5 (`claude-opus-5-5`, adaptive thinking only, always on) |
|
v2.1.280claude-opus-5-5 |
Documentation arrivedA small documentation edit on API usage primer for Claude touched a line naming claude-opus-5-5 after this was published.
the line in the docs* Claude Opus 5.5 (`claude-opus-5-5`, adaptive thinking only, always on) |
|
v2.1.280/effort |
Documentation arrivedAnthropic's documentation has since written up /effort, on prompting-claude-opus-5.
the line in the docsClaude Opus 5 runs with [thinking](https://platform.claude.com/docs/en/build-with-claude/thinking) on by default, and thinking can be disabled only at [effort](https://platform.claude.com/docs/en/build-with-claude/effort) `high` or below. … |
|
v2.1.280/effort |
Documentation arrivedAnthropic's documentation has since written up /effort, on prompting-claude-opus-5.
the line in the docsClaude Opus 5 runs with [thinking](https://platform.claude.com/docs/en/build-with-claude/thinking) on by default, and thinking can be disabled only at [effort](https://platform.claude.com/docs/en/build-with-claude/effort) `high` or below. … |
|
v2.1.248claude-opus-4-8 |
Documentation arrivedA small documentation edit on prompting-claude-opus-4-8 touched a line naming claude-opus-4-8 after this was published.
the line in the docsThis guide covers the prompting patterns specific to Claude Opus 4.8. For the API changes involved in moving from Claude Opus 4.8 to Claude Opus 5.5, see [Migrating to Claude Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/… |
|
v2.1.280opus-4-8 |
Documentation arrivedA small documentation edit on prompting-claude-opus-4-8 touched a line naming opus-4-8 after this was published.
the line in the docsThis guide covers the prompting patterns specific to Claude Opus 4.8. For the API changes involved in moving from Claude Opus 4.8 to Claude Opus 5.5, see [Migrating to Claude Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/… |
|
v2.1.246opus-4-8 |
Documentation arrivedA small documentation edit on prompting-claude-opus-4-8 touched a line naming opus-4-8 after this was published.
the line in the docsThis guide covers the prompting patterns specific to Claude Opus 4.8. For the API changes involved in moving from Claude Opus 4.8 to Claude Opus 5.5, see [Migrating to Claude Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/… |
|
v2.1.280system |
Documentation arrivedA small documentation edit on Delivering work touched a line naming system after this was published.
the line in the docsClaude Fable 5.1's writing has few stock phrases and little unexplained jargon. In some cases, though, its prose is denser than Claude Fable 5's: sentences run longer and there are fewer paragraph breaks. An instruction that defines the an… |
|
v2.1.280user |
Documentation arrivedA small documentation edit on Delivering work touched a line naming user after this was published.
the line in the docsClaude Fable 5.1's writing has few stock phrases and little unexplained jargon. In some cases, though, its prose is denser than Claude Fable 5's: sentences run longer and there are fewer paragraph breaks. An instruction that defines the an… |
|
v2.1.280max |
Documentation arrivedA small documentation edit on Request 2 caches its request content (not the response) touched a line naming max after this was published.
the line in the docsecho $prewarm->stopReason, PHP_EOL; // "max_tokens" |
|
v2.1.274position |
Documentation arrivedA small documentation edit on Request 2 caches its request content (not the response) touched a line naming position after this was published.
the line in the docs| **Dropped thinking blocks** | ✓ | ✓ | ✘ | When the API drops a Claude Fable 5.1, Claude Mythos 5.1, or Claude Opus 5.5 thinking block that isn't [preserved](https://platform.claude.com/docs/en/build-with-claude/thinking#preserved-thinkin… |