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検証

Claude Code 13版の変更点を原文で確認

Claude Code の CHANGELOG.md を2026年9月28日 01:10 JST 時点と10月14日 09:25 JST 時点で比べると、10月14日の側にだけある版は 2.1.284 から 2.1.296 までの13版・1,110項目で、そのうち行頭の語が Added・Changed・Removed の項目は223件(Deprecated は0件)、さらにそのうち本文に掲げた20の英語の語句のいずれかを含む項目は42件でした。10月14日取得の CHANGELOG.md で確認した範囲では各版の公開日の記載は無く、13版がそれぞれ何月に出た版かは、このページからは決まりません。

最終確認
2026-10-14
確認方法
GitHub の anthropics/claude-code リポジトリの CHANGELOG.md を 2026-09-28 01:10 JST と 2026-10-14 09:25 JST に取得し、後者にだけある版の節を対象にした。項目は行頭の語で分け、Added・Changed・Removed・Deprecated の項目を逐語で並べた。本文に掲げた20の語句を含む項目は、本文に書いた規則どおりにスクリプトで抜き出した
扱わないもの
項目の和訳・要約・評価、各版の公開日、読者の環境で設定の変更が要るかどうか、コミット履歴・Releases・npm・公式ドキュメント
更新周期
毎月(今回の 2026-10-14 の取得版を次回の比較の起点にする)

この記事は、どの版を対象にしたか

対象は、2026年10月14日 09:25:56 JST に取得した CHANGELOG.md にあり、2026年9月28日 01:10 JST に取得した CHANGELOG.md に無い版で、2.1.284〜2.1.296 の13版です。

CHANGELOG.md は # Changelog の下に ## 2.1.296 のような版番号の見出しが並び、各見出しの下に - で始まる項目が続く形です。10月14日の版の版番号の見出しは418個、9月28日の版は405個で、9月28日の版にある405版はすべて10月14日の版にもあり、両方にある版の節は1行も違いませんでした。差の13個の見出しが、この記事の対象です。

途中の時点の CHANGELOG.md は、Internet Archive の保存版で見られます。5つの時点を並べると次のとおりです。

時点(JST)取得元URL のブランチ表記先頭の版版番号の見出しの数
2026-09-25 21:56:43Internet Archive の保存版(2026-09-25 12:56:43 UTC)main2.1.282404
2026-09-28 01:10raw.githubusercontent.com から取得main2.1.283405
2026-10-01 05:01:40Internet Archive の保存版(2026-09-30 20:01:40 UTC)refs/heads/main2.1.286408
2026-10-12 09:41:55Internet Archive の保存版(2026-10-12 00:41:55 UTC)refs/heads/main2.1.296418
2026-10-14 09:25:56raw.githubusercontent.com から取得main2.1.296418

どの時点の組み合わせでも、両方にある版の節は1行も違いませんでした。保存版の有無は、Internet Archive の保存版の一覧(CDX)で次の範囲を照会して確かめています。

CHANGELOG.md に各版の公開日は書かれているか

2026年10月14日に取得した CHANGELOG.md で確認した範囲では、版の見出しにも項目の本文にも、各版の公開日の記載はありません。

ファイル全体で YYYY-MM-DD の形の文字列は5か所あり、いずれも MCP のプロトコルの版(2026-07-28 が4か所、2025-11-25 が1か所)を指す項目の中の文字列です。この記事は版ごとの公開日・公開月を書きません。次の節の時刻は、版の項目が CHANGELOG.md に載っていた時点です。

13版は、いつまでに CHANGELOG.md に載ったか

2.1.284〜2.1.286 の3版は、2026年9月28日 01:10 JST の CHANGELOG.md には無く、10月1日 05:01:40 JST の保存版にはあります。2.1.287〜2.1.296 の10版は、10月1日 05:01:40 JST の保存版には無く、10月12日 09:41:55 JST の保存版にはあります。

版無かった時点(JST)あった時点(JST)
2.1.284〜2.1.286(3版)2026-09-28 01:102026-10-01 05:01:40
2.1.287〜2.1.296(10版)2026-10-01 05:01:402026-10-12 09:41:55

この表から言えるのは、各版の節が CHANGELOG.md に加わった時刻の幅だけです。2.1.284〜2.1.286 の幅(2026年9月28日 01:10 から10月1日 05:01 JST)には9月中の時刻が含まれます。2.1.287〜2.1.296 は10月1日 05:01 JST より後に加わっていますが、これらが10月に公開された版かどうかもこのページからは決まりません。

13版の項目は何件で、どの語で始まっているか

13版の項目は合わせて1,110件で、行頭の語は Fixed が735件、Improved が147件、Changed が123件、Added が99件、Removed が1件、Deprecated が0件、それ以外が5件です。

数え方は次のとおりです。

版項目数AddedChangedRemovedDeprecatedFixedImprovedその他追加・変更・削除の計うち掲げた語句を含む項目
2.1.2967984005692121
2.1.29514317160097130334
2.1.2942000011000
2.1.293563600387291
2.1.29292870064130152
2.1.2912000020000
2.1.290190152500131190408
2.1.289271000232110
2.1.28889760064120135
2.1.2871069100067200194
2.1.286887151049160231
2.1.285136102300861703313
2.1.28410014110057180253
計11109912310735147522342

2.1.294 と 2.1.291 は2項目ずつで、いずれも行頭の語は Fixed または Improved です。全項目の原文は GitHub の CHANGELOG.md で読めます。

行頭の語が Fixed・Improved・Reverted・Updated の887件を、接頭辞ごとに数えると次のとおりです。この記事はこの887件の原文を掲載せず、次の節の語句の照合もしていません。

接頭辞FixedImprovedRevertedUpdated計
(接頭辞なし)59112122716
[VSCode]6251068
[Claude Tag]31130044
[Cloud sessions]2220024
[Code Review]1140015
Windows:910010
Self-hosted runner:21003
[Remote Control]20002
macOS:20002
Bedrock, Vertex, Mantle:10001
Security:10001
WSL:10001
計73514732887

本文に掲げた語句を含む項目はどれか

行頭の語が Added・Changed・Removed・Deprecated の223件のうち、下に掲げた20の英語の語句のいずれかを含む項目は42件です。42件は語句が文字列として含まれるかどうかだけで決めており、設定の変更が要るかどうかを判定したものではありません。

照合した語句は次の20個です。指定する・取りやめる・上書きする・元に戻す・名前を変える・割り当て直すことを表すことがある英語の言い回しとして、この記事が選びました。語句の選び方はこの記事の選択であり、別の語句を選べば件数は変わります。

opt out opts out override overrides restore still works still can still turns turn off turns off turn it off turns it off turn them off unless set use you pass rename rebound keeps

当てはめの規則は次のとおりで、この規則をスクリプトで適用した結果をそのまま載せています。

この抜き出しが答える範囲。「設定の変更が要るかどうかを CHANGELOG が述べているか」という問いに対して、この抜き出しが示すのは、項目の英文に掲げた語句があるかどうかと、語句を含む句の原文までです。次の3つは示しません。

版区分含んでいた語句掲げた語句を含む句(逐語)
2.1.296AddedsetAdded CLAUDE_CODE_OVERLOADED_RETRY_MAX_DELAY_MS environment variable to set a longer maximum delay for the backoff when retrying an overloaded
2.1.295Addedseta value you set now limits how long a stream may take to start there, after which it fails over or gets a 502
2.1.295ChangedkeepsChanged Ctrl+C at the idle prompt of an attached background session to leave a pending /loop wakeup alone, so pressing it twice detaches and the loop keeps running
2.1.295Changedunlessrunning sessions now stop in about a minute unless it is run again, and a notice says so
2.1.295Changedopts outMCP_PROTOCOL_NEGOTIATION=legacy opts out
2.1.293ChangeduseChanged claude.ai skill syncing to check for changes about every 40 minutes, instead of every 10, while no session is in use
2.1.292AddedsetAdded CLAUDE_CODE_OVERLOADED_RETRY_BASE_DELAY_MS environment variable to set a longer base delay for the backoff when retrying an overloaded
2.1.292Changedopts outMCP_PROTOCOL_NEGOTIATION=legacy opts out
2.1.290AddedsetAdded /claude-api managed-agents-onboard <url> to set up the Managed Agents pattern a page describes as ant apply files
2.1.290Changeduseuse --chrome, /chrome or your user settings
2.1.290ChangedrenameChanged /model, /effort and /rename sent from claude agents to a busy background session to apply right away, without a confirmation, instead of when the turn ends
2.1.290Changedturns it offCLAUDE_CODE_WEB_SEARCH_REFILLS_PER_HOUR sets the rate, 0 turns it off
2.1.290Changedstill can, setChanged CLAUDE_CODE_DISABLE_ATTACHMENTS so a repository's .claude/settings.json or .claude/settings.local.json can no longer set it … shell, user and managed settings still can
2.1.290Changedset, usea host other than github.com set in GH_HOST or GH_REPO is now refused … use --hostname or a full URL
2.1.290Changedturn off, unless, useChanged the claude-api skill's Managed Agents examples to turn off the web tools unless the agent needs them and to use the auto permission policy
2.1.290[VSCode] Changedturn them offturn them off with the Claude Code
2.1.288Addedyou passthe choice is reused until you pass --max-findings default
2.1.288Addedrename, reboundboth, and rename, can be rebound in keybindings.json
2.1.288ChangeduseChanged the client-side auto mode classifier to ignore an ANTHROPIC_DEFAULT_SONNET_MODEL pin that names Claude Sonnet 5.5 or Opus 5.5 and use Claude Sonnet 5 instead
2.1.288Changedstill worksthe old name still works and prints a notice
2.1.288ChangedkeepsChanged /autocompact to save the auto-compact window per model, so each model keeps its own setting when you switch
2.1.287Windows: Addedturns offAdded a startup warning when denying the Bash tool also turns off the PowerShell tool, so Claude has no shell tool
2.1.287Self-hosted runner: Addedusefor sessions that use Anthropic-managed git on macOS and Linux machines where the GitHub CLI is not installed
2.1.287Changeduse, keepsChanged Opus 4.7+ and Fable to use a 1M context window by default on Bedrock, Vertex, Foundry and the Claude apps gateway, with no [1m] suffix … CLAUDE_CODE_DISABLE_1M_CONTEXT=1 keeps 200K
2.1.287Changedrestore, setset CLAUDE_AX_PREPARK_MS=50 to restore the pause
2.1.286[Claude Tag] Addedset[Claude Tag] Added an Add channel button to Claude Tag's spend limits page in admin settings, so a limit can be set on any channel, including a private one, from its channel ID or Slack link
2.1.285Addedturn offAdded CLAUDE_CODE_DISABLE_WEB_FETCH environment variable to turn off the WebFetch tool
2.1.285AddedsetAdded <server>.<key>=<value> to claude plugin install --config, so a bundled .mcpb MCP server's own settings can be set at install time and it starts without visiting /plugin → Configure
2.1.285AddeduseAdded allowedProviders managed setting to limit which API providers a machine may use
2.1.285ChangedsetChanged MCP tools so a tool that sets its own _meta['anthropic/alwaysLoad'] to false stays deferred when its --mcp-config, Agent SDK or plugin server is set to alwaysLoad
2.1.285Changedunless, setChanged Code Review's pull request reviews and /ultrareview to run when disableWorkflows is on, unless the machine running the review has it set by its own administrator
2.1.285ChangeduseChanged sessions behind a custom ANTHROPIC_BASE_URL to use the 1M context window of models that have one
2.1.285Changedstill worksturning it off there still works
2.1.285Changedoverrides--permission-mode still overrides it
2.1.285Changedrenameyour own server under it, or a close spelling such as widgets_, no longer loads, so rename it
2.1.285Windows: ChangedsetChanged project and local settings env to no longer set ALLUSERSPROFILE, SystemDrive, or the CommonProgramFiles variables … set them in user or managed settings instead
2.1.285Changedstill turns, turns it off/config chrome=false still turns it off when it was on
2.1.285Changedturn offChanged sandbox settings so project settings cannot widen or turn off an admin-required sandbox, replace the proxy behind a managed deny list, extend a strict allowlist, or reopen managed read-denies
2.1.285[Cloud sessions] Changedset[Cloud sessions] Changed MCP_DISCOVERY_CACHE=1, when set in your cloud environment's variables rather than a settings file, to reuse your connectors' tool lists after a session restart
2.1.284AddedreboundAdded effortSlider:decreaseEffort, increaseEffort and toggleUltracode keybinding actions, so the /effort slider's arrow and Tab keys can be rebound in keybindings.json
2.1.284Changedoverridespermissions.defaultMode still overrides it
2.1.284Changedunlessunless it is on a mapped network drive added with --add-dir

追加・変更・削除された223件は何か

13版のうち、行頭の語が Added・Changed・Removed・Deprecated の223件を、CHANGELOG.md の記載順(2.1.296 から 2.1.284 へ、版の中も記載順)のまま、英文で並べます。

「区分」は行頭の語で、接頭辞があれば接頭辞を含めて書いています。「掲げた語句を含む句」は前の節の規則で切り出した句で、20の語句のどれも含まない項目は「掲げた語句なし」としています。2.1.294 と 2.1.291 は該当する項目がありません。

2.1.296

2.1.296 の節は79項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は12件、掲げた語句を含む項目は1件です。

版区分項目(逐語)掲げた語句を含む句
2.1.296AddedAdded a code key to the Claude apps gateway's managed.policies[]: the same settings as cli, also applied in Claude Desktop's Code tab; beside desktop, it turns on Claude Desktop's gateway mode掲げた語句なし
2.1.296AddedAdded autoCompactWindow to subagent frontmatter and --agents definitions, so a subagent can auto-compact earlier than the main conversation's window掲げた語句なし
2.1.296AddedAdded CLAUDE_CODE_WORKFLOW_SUBAGENT_MODEL to run every workflow agent on one model while other subagents keep theirs掲げた語句なし
2.1.296AddedAdded CLAUDE_CODE_OVERLOADED_RETRY_MAX_DELAY_MS environment variable to set a longer maximum delay for the backoff when retrying an overloaded (529) requestAdded CLAUDE_CODE_OVERLOADED_RETRY_MAX_DELAY_MS environment variable to set a longer maximum delay for the backoff when retrying an overloaded
2.1.296AddedAdded a note in /plugin on a plugin whose hooks are left out because another enabled plugin has the same name掲げた語句なし
2.1.296AddedAdded an allow_large option to the Read tool so Claude can read a text file past the usual size limits in one call when it needs the whole file and the context has room掲げた語句なし
2.1.296ChangedChanged the default limit on MCP tool descriptions sent up front and on MCP server instructions from 2,048 to 4,096 characters掲げた語句なし
2.1.296ChangedChanged ←: a turn or ! command started while the session moves to the background is now stopped instead of finishing out of sight掲げた語句なし
2.1.296[VSCode] Changed[VSCode] Changed Claude in Chrome to ask before browser actions in every session, including one connected with @browser, as the terminal does; allowing a site for the session stops repeat asks掲げた語句なし
2.1.296[Cloud sessions] Added[Cloud sessions] Added a status filter to the Sessions and Runners lists on a self-hosted environment's Activity tab in admin settings; you can pick several statuses at once掲げた語句なし
2.1.296[Claude Tag] Changed[Claude Tag] Changed Claude in Slack to show the footer with the session link, model and cost only on its newest reply in a thread; the reply before it drops the footer掲げた語句なし
2.1.296[Claude Tag] Added[Claude Tag] Added creating, editing and deleting workspace and channel memory files on the Activity page's Memory tab for members with the Claude Tag Admin permission掲げた語句なし

2.1.295

2.1.295 の節は143項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は33件、掲げた語句を含む項目は4件です。

版区分項目(逐語)掲げた語句を含む句
2.1.295AddedAdded onFailure: "block" for command and HTTP hooks: a hook that can't start, times out, or exits with an unexpected code blocks the action instead of letting it through掲げた語句なし
2.1.295AddedAdded Program Status Protocol (OSC 7501) support: terminals that implement it can show whether Claude Code is working, waiting on you, or done掲げた語句なし
2.1.295AddedAdded quoted text to the /copy picker, so a drafted message copies without its > markers掲げた語句なし
2.1.295AddedAdded a warning to claude plugin install, enable, disable and marketplace add when the settings file they write to does not load掲げた語句なし
2.1.295AddedAdded a line on stderr, when it is a terminal, that says what a claude -p run is waiting for when it stays open after its last turn掲げた語句なし
2.1.295AddedAdded support for timeouts.upstream_ttfb_ms on the Claude apps gateway's Bedrock, Vertex, Foundry and other cloud upstreams: a value you set now limits how long a stream may take to start there, after which it fails over or gets a 502a value you set now limits how long a stream may take to start there, after which it fails over or gets a 502
2.1.295AddedAdded a "Backgrounding cancelled" message when you stop the turn while ← is waiting for the current tool to finish掲げた語句なし
2.1.295AddedAdded an optional models list to every Claude apps gateway upstream: only the listed models are sent there, on failover too, and one * in an entry is a wildcard掲げた語句なし
2.1.295AddedAdded support for forceLoginMethod: "gateway" and forceLoginGatewayUrl in your own user settings on machines with no managed settings, so /login opens on that Claude apps gateway掲げた語句なし
2.1.295AddedAdded advice to claude plugin validate when a plugin's README has no install line: it prints the line to paste and never changes the exit code, even with --strict掲げた語句なし
2.1.295AddedAdded upstream_request_id to the Claude apps gateway's inference audit event: the request ID from Amazon Bedrock, the Anthropic API or another upstream, for support cases掲げた語句なし
2.1.295AddedAdded $.ui.notify for mods: raises a native notification through your own notification setting and says which channel sent it掲げた語句なし
2.1.295AddedAdded children to a mod's Button: strings and Text, so a row of a list is one pressable with a chip or a dim detail inside掲げた語句なし
2.1.295AddedAdded CLAUDE_CODE_RETRY_WATCHDOG_MAX_WAIT_MS to limit how long unattended retry mode (CLAUDE_CODE_RETRY_WATCHDOG) waits out 429 and 529 errors掲げた語句なし
2.1.295AddedAdded a request-id header to the Claude apps gateway's successful inference responses, so request_id in Claude Code telemetry matches the gateway's audit log掲げた語句なし
2.1.295ChangedChanged MCP tool descriptions the model loads through tool search to be cut at 16,384 characters instead of 2,048掲げた語句なし
2.1.295ChangedChanged subagents to preload at most 32 skills from the skills field, each once; a subagent with the Skill tool can still invoke the rest掲げた語句なし
2.1.295ChangedChanged Ctrl+C at the idle prompt of an attached background session to leave a pending /loop wakeup alone, so pressing it twice detaches and the loop keeps running; press Esc to stop itChanged Ctrl+C at the idle prompt of an attached background session to leave a pending /loop wakeup alone, so pressing it twice detaches and the loop keeps running
2.1.295ChangedChanged claude agents stopped with its background service (macOS, or Linux without the service installed): running sessions now stop in about a minute unless it is run again, and a notice says sorunning sessions now stop in about a minute unless it is run again, and a notice says so
2.1.295ChangedChanged claude.ai connectors to negotiate MCP protocol version 2026-07-28 by default on installs that fetch no flags; MCP_PROTOCOL_NEGOTIATION=legacy opts outMCP_PROTOCOL_NEGOTIATION=legacy opts out
2.1.295ChangedChanged Artifact pages with no background of their own to show on white instead of off-white掲げた語句なし
2.1.295ChangedChanged what Claude and you read when a mod denies a tool call after the tool ran: it now says the tool ran and a plugin withheld its result掲げた語句なし
2.1.295ChangedChanged tab stops to count from where a text starts instead of from the screen's left edge: an answer indented by 2 has its first stop 8 cells in, where it was 6掲げた語句なし
2.1.295ChangedChanged the Artifact tool's permission prompts with telemetry disabled to the same five questions other installs get, instead of asking before each read of someone else's artifact and each data edit掲げた語句なし
2.1.295ChangedChanged scheduled and Run now routine runs in installs with telemetry disabled to publish new private artifacts, and update your own, without asking, as in other installs掲げた語句なし
2.1.295ChangedChanged toasts from your organization's mods to show ahead of other mods' toasts instead of waiting behind them掲げた語句なし
2.1.295ChangedChanged the Claude apps gateway to start with a warning and serve a desktop policy key its bundled Claude Desktop schema doesn't know, so new Desktop settings need no gateway upgrade掲げた語句なし
2.1.295ChangedChanged WebSocket (ws) MCP servers: a message over 16 MiB is no longer parsed and closes the connection, the limit the other transports already have掲げた語句なし
2.1.295[VSCode] Added[VSCode] Added a chat row for files Claude sends you: click a file's name to open it in the editor; Claude's caption shows underneath, and the row stays visible in Focus view掲げた語句なし
2.1.295Self-hosted runner: ChangedSelf-hosted runner: Changed the runner to stop passing CCR_AUTO_MODE_ALLOW, CCR_AUTO_MODE_ENVIRONMENT and CCR_AUTO_MODE_SOFT_DENY into a session's environment掲げた語句なし
2.1.295[Claude Tag] Changed[Claude Tag] Changed the settings confirmation cards Claude posts in a Slack channel to stay open for 30 minutes instead of 10掲げた語句なし
2.1.295[Claude Tag] Changed[Claude Tag] Changed Claude's notice that a channel shared across Enterprise Grid workspaces uses organization defaults to post only when someone mentions Claude, at most once a month掲げた語句なし
2.1.295[Claude Tag] Added[Claude Tag] Added a confirmation in Claude Tag admin settings before adding a channel manager moves that member to Custom roles, which can remove their other access掲げた語句なし

2.1.293

2.1.293 の節は56項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は9件、掲げた語句を含む項目は1件です。

版区分項目(逐語)掲げた語句を含む句
2.1.293AddedAdded Claude Haiku 5.5 (claude-haiku-5-5), now the default Haiku model on the Anthropic API — 1M context, $0.10/$0.50 per Mtok ($0.50/$2.50 for prompts over 100K)掲げた語句なし
2.1.293AddedAdded agentType to the subagentStatusLine payload, so scripts can tell custom subagent types apart掲げた語句なし
2.1.293AddedAdded isDeferred to $.tool.register for mods: false lists the tool's schema in the prompt from the start instead of behind tool search掲げた語句なし
2.1.293ChangedChanged claude.ai skill syncing to check for changes about every 40 minutes, instead of every 10, while no session is in useChanged claude.ai skill syncing to check for changes about every 40 minutes, instead of every 10, while no session is in use
2.1.293ChangedChanged the order of agent lists and of MCP servers announced to the model: names with non-ASCII characters now sort after ASCII names掲げた語句なし
2.1.293ChangedChanged OpenTelemetry claude_code.at_mention logging to emit at most 100 agent and 100 MCP-resource events each time a prompt is read掲げた語句なし
2.1.293Self-hosted runner: ChangedSelf-hosted runner: Changed the orchestrator to sleep 4 to 6 seconds between polls instead of a constant 5, so several replicas for one environment stop polling at the same moment掲げた語句なし
2.1.293[Claude Tag] Changed[Claude Tag] Changed Claude in Slack to join announcement channels, where only admins can post, without posting its intro掲げた語句なし
2.1.293[Claude Tag] Changed[Claude Tag] Changed the limit on channel rules in Claude Tag admin settings from 20 to 50 for each workspace and for the organization-wide Slack page掲げた語句なし

2.1.292

2.1.292 の節は92項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は15件、掲げた語句を含む項目は2件です。

版区分項目(逐語)掲げた語句を含む句
2.1.292AddedAdded --marketplace <source> to claude plugin install: adds the marketplace if needed, under the same policy checks as claude plugin marketplace add, then installs the plugin from it掲げた語句なし
2.1.292AddedAdded an effort parameter to the Agent tool, so Claude runs a sub-agent at the effort level you ask for掲げた語句なし
2.1.292AddedAdded CLAUDE_CODE_OVERLOADED_RETRY_BASE_DELAY_MS environment variable to set a longer base delay for the backoff when retrying an overloaded (529) requestAdded CLAUDE_CODE_OVERLOADED_RETRY_BASE_DELAY_MS environment variable to set a longer base delay for the backoff when retrying an overloaded
2.1.292AddedAdded prompt.autocomplete, an event a mod hooks to add its own rows to the prompt box's autocomplete list掲げた語句なし
2.1.292AddedAdded prompt caching to $.model.complete for mods: prompt and system take blocks of text, and cache: true on a block caches the request up to it掲げた語句なし
2.1.292AddedAdded workflow agents to the agent.spawn mod hook, with their run and index, so a mod can refuse them掲げた語句なし
2.1.292ChangedChanged local (stdio) MCP server connections to negotiate protocol version 2026-07-28 by default on every install, including Bedrock, Vertex and Foundry; MCP_PROTOCOL_NEGOTIATION=legacy opts outMCP_PROTOCOL_NEGOTIATION=legacy opts out
2.1.292ChangedChanged claude plugin test: a failed expect inside a hook the test registered, or a stub answer the engine refuses, now fails the test instead of passing silently掲げた語句なし
2.1.292ChangedChanged usage limit messages to write claude.ai settings links with https:// so terminals and apps can make them clickable掲げた語句なし
2.1.292ChangedChanged scheduled and Run now routine runs to publish a new artifact only you can see without asking for approval; artifacts that request connectors or other access still ask掲げた語句なし
2.1.292ChangedChanged agent names to allow at most 256 characters: a longer one is rejected, and a skill's or a plugin file's name longer than that is ignored掲げた語句なし
2.1.292[Claude Tag] Added[Claude Tag] Added an Edit button to the Allowed domains card on a channel's Configure page, so Enterprise admins can open the access bundle that sets the channel's domains掲げた語句なし
2.1.292[Claude Tag] Changed[Claude Tag] Changed the first message of a Slack thread continued with !fork to a card showing where it came from, the request, and who asked, with a link to the original thread掲げた語句なし
2.1.292[Claude Tag] Changed[Claude Tag] Changed the organization-wide and default spend limit boxes on Claude Tag's spend limits page in admin settings to save only when you press Save or Enter, not when you click away掲げた語句なし
2.1.292[Code Review] Added[Code Review] Added the period's total with its change from the previous period, and a breakdown by repository, to the PRs reviewed chart in Code Review analytics掲げた語句なし

2.1.290

2.1.290 の節は190項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は40件、掲げた語句を含む項目は8件です。

版区分項目(逐語)掲げた語句を含む句
2.1.290AddedAdded serverToolUses to the result of a mod's turn.step hook: the tool calls the API ran itself (the advisor), each with its id, name, input, start and end掲げた語句なし
2.1.290AddedAdded agentId to the tool.check event of plugin hooks, so a hook can tell a subagent's permission check from the main session's掲げた語句なし
2.1.290AddedAdded ceiling to the question and verdict a mod's tool.check hook reads, naming the approval an organization requires for a tool掲げた語句なし
2.1.290AddedAdded ThemeKey and Color types to the plugin hooks typings, so an editor lists the theme colors a mod's drawing can name掲げた語句なし
2.1.290AddedAdded to claude plugin validate: each hook a mod registers at a gating site is listed with whether it has a .catch (gatingHooks under --json)掲げた語句なし
2.1.290AddedAdded a Deny button to the Claude apps gateway's sign-in approval page: it ends the pending sign-in, so the waiting terminal stops within seconds掲げた語句なし
2.1.290AddedAdded claude attach <name> and claude logs <name>: part of a session name works in place of the id掲げた語句なし
2.1.290AddedAdded /claude-api managed-agents-onboard <url> to set up the Managed Agents pattern a page describes as ant apply filesAdded /claude-api managed-agents-onboard <url> to set up the Managed Agents pattern a page describes as ant apply files
2.1.290AddedAdded /claude-api managed-agents-onboard <quickstart-name> to build a Console quickstart template, such as deep-researcher, with the ant CLI掲げた語句なし
2.1.290AddedAdded a warning when a managed settings file is a link to a file outside the managed settings folder掲げた語句なし
2.1.290AddedAdded a /status and doctor warning when managed settings ignore user-configured sandbox allowRead paths or allowed domains掲げた語句なし
2.1.290ChangedChanged CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC to also skip the startup connection warm-up掲げた語句なし
2.1.290ChangedChanged Claude in Chrome so that a project's settings files can no longer turn it on; use --chrome, /chrome or your user settingsuse --chrome, /chrome or your user settings
2.1.290ChangedChanged the Bash tool to ask for permission before running pyright, which is no longer treated as a read-only command掲げた語句なし
2.1.290ChangedChanged what a mod's $.process.spawn rejects with when another mod denies it after the child ran: it now says the call ran and a plugin withheld its result掲げた語句なし
2.1.290ChangedChanged the background daemon's log to write a multi-line message as one JSON-quoted line掲げた語句なし
2.1.290ChangedChanged skills and custom commands to refuse a ! shell command that contains raw control characters other than tab and newline, with a message that shows where they are掲げた語句なし
2.1.290ChangedChanged /artifacts: opening an artifact in your browser now closes the list掲げた語句なし
2.1.290ChangedChanged Bash permission checks so that more forms of the ps command ask for approval instead of running without asking掲げた語句なし
2.1.290ChangedChanged plugin hooks so long text is clipped and logged instead of being refused or dropped silently掲げた語句なし
2.1.290ChangedChanged background sessions whose scheduled task is gone: they now move to Completed about 20 seconds later and can be updated or shut down when idle掲げた語句なし
2.1.290ChangedChanged the "Press ← again" confirm on a just-cleared prompt: a second ← no longer has to wait a second before it switches, and holding ← down now switches too掲げた語句なし
2.1.290ChangedChanged the errors shown when the /ultrareview upload fails at a git step: they name the step and what to try, and no longer repeat git's own error text掲げた語句なし
2.1.290ChangedChanged /code-review at medium effort to also report cleanup and CLAUDE.md conventions findings on models without tuned review settings, including Opus 5.5 and Sonnet 5.5掲げた語句なし
2.1.290ChangedChanged an in-process teammate's agent_id in Agent results to its agent ID (its name@team address stays in teammate_id); TeammateIdle hooks no longer fire from its subagents or forks掲げた語句なし
2.1.290ChangedChanged background sessions waiting on a scheduled wakeup (/loop): they are now left running through updates and low memory, where being restarted or shut down could silently lose the wakeup掲げた語句なし
2.1.290ChangedChanged /model, /effort and /rename sent from claude agents to a busy background session to apply right away, without a confirmation, instead of when the turn endsChanged /model, /effort and /rename sent from claude agents to a busy background session to apply right away, without a confirmation, instead of when the turn ends
2.1.290ChangedChanged the Claude apps gateway's minimum supported PostgreSQL version from 14 to 11掲げた語句なし
2.1.290ChangedChanged the interactive session's WebSearch budget to refill over time (100 calls/hour; CLAUDE_CODE_WEB_SEARCH_REFILLS_PER_HOUR sets the rate, 0 turns it off) instead of ending after 200 callsCLAUDE_CODE_WEB_SEARCH_REFILLS_PER_HOUR sets the rate, 0 turns it off
2.1.290ChangedChanged CLAUDE_CODE_DISABLE_ATTACHMENTS so a repository's .claude/settings.json or .claude/settings.local.json can no longer set it; shell, user and managed settings still canChanged CLAUDE_CODE_DISABLE_ATTACHMENTS so a repository's .claude/settings.json or .claude/settings.local.json can no longer set it … shell, user and managed settings still can
2.1.290ChangedChanged claude plugin update on a plugin loaded from a directory to print just its reason, without the "Failed to update plugin" prefix, as for built-in plugins掲げた語句なし
2.1.290ChangedChanged the built-in gh api in cloud sessions: a host other than github.com set in GH_HOST or GH_REPO is now refused (use --hostname or a full URL), and stderr notes requests to other hostsa host other than github.com set in GH_HOST or GH_REPO is now refused … use --hostname or a full URL
2.1.290ChangedChanged the claude-api skill's Managed Agents examples to turn off the web tools unless the agent needs them and to use the auto permission policyChanged the claude-api skill's Managed Agents examples to turn off the web tools unless the agent needs them and to use the auto permission policy
2.1.290Self-hosted runners: ChangedSelf-hosted runners: Changed claude --environment <id> to create its session through the current Sessions API; printed and JSON session ids keep their session_… form掲げた語句なし
2.1.290[VSCode] Added[VSCode] Added a screen reader announcement, "Message queued.", when you send a message while Claude is working掲げた語句なし
2.1.290[VSCode] Added[VSCode] Added a way to review and run a plugin marketplace's install or update command from the Manage plugins dialog掲げた語句なし
2.1.290[VSCode] Changed[VSCode] Changed message timestamps to show by default (turn them off with the Claude Code: Show Message Timestamps setting)turn them off with the Claude Code
2.1.290[Claude Tag] Added[Claude Tag] Added fast mode in Slack: mention Claude with !fast to switch a thread to fast mode, moving it to Opus if needed, and !fast off to switch back; replies show (fast) while it's on掲げた語句なし
2.1.290[Claude Tag] Added[Claude Tag] Added the optional Path prefixes field when creating a custom connection in an access bundle, so its allow rule can cover only those paths instead of the whole host掲げた語句なし
2.1.290[Claude Tag] Changed[Claude Tag] Changed the channel instructions limit to 8,192 characters instead of bytes, so non-English text gets the same room, and added a character count beside Save on the Configure page掲げた語句なし

2.1.289

2.1.289 の節は27項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は1件、掲げた語句を含む項目は0件です。

版区分項目(逐語)掲げた語句を含む句
2.1.289AddedAdded agent.spawn for teammates, one agent id across plugin hook events, and idle and waiting states in $.agent.list()掲げた語句なし

2.1.288

2.1.288 の節は89項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は13件、掲げた語句を含む項目は5件です。

版区分項目(逐語)掲げた語句を含む句
2.1.288AddedAdded $.ui.selection() for mods: returns the text you last selected in fullscreen mode and, when the selection lies within one transcript row, that row掲げた語句なし
2.1.288AddedAdded a built-in gh api to cloud sessions whose image has no GitHub CLI, and fixed the built-in sending control characters from file names, jq filters or GitHub errors to the terminal掲げた語句なし
2.1.288AddedAdded recovery for a prompt cleared with Ctrl+C: pressing Up on the empty prompt brings the draft back, including pasted text and images掲げた語句なし
2.1.288AddedAdded a re-authenticate prompt when an MCP server asks for more OAuth scope during a tool call掲げた語句なし
2.1.288AddedAdded --max-findings <n>|all to /code-review to report more or fewer findings than the usual limit; the choice is reused until you pass --max-findings defaultthe choice is reused until you pass --max-findings default
2.1.288AddedAdded Ctrl+F to find a session by name and Alt+↑/↓ to jump between groups in the agents view; both, and rename, can be rebound in keybindings.jsonboth, and rename, can be rebound in keybindings.json
2.1.288AddedAdded a screen reader mode announcement of the new permission mode when you approve a plan, including with Shift+Tab掲げた語句なし
2.1.288ChangedChanged the background command time limit to apply only in unattended sessions (-p, Agent SDK, CI, cloud); terminal, desktop app and VS Code sessions have no limit掲げた語句なし
2.1.288ChangedChanged the client-side auto mode classifier to ignore an ANTHROPIC_DEFAULT_SONNET_MODEL pin that names Claude Sonnet 5.5 or Opus 5.5 and use Claude Sonnet 5 insteadChanged the client-side auto mode classifier to ignore an ANTHROPIC_DEFAULT_SONNET_MODEL pin that names Claude Sonnet 5.5 or Opus 5.5 and use Claude Sonnet 5 instead
2.1.288ChangedChanged claude project purge to claude purge; the old name still works and prints a noticethe old name still works and prints a notice
2.1.288ChangedChanged the agents view n: filter (and Ctrl+F search) so Enter opens the session whose name matches best instead of the top row掲げた語句なし
2.1.288ChangedChanged /autocompact to save the auto-compact window per model, so each model keeps its own setting when you switchChanged /autocompact to save the auto-compact window per model, so each model keeps its own setting when you switch
2.1.288ChangedChanged MCP URL prompts from servers that can't report when you're done to wait for "I'm done, continue" before the tool call continues, so you can finish in the browser first掲げた語句なし

2.1.287

2.1.287 の節は106項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は19件、掲げた語句を含む項目は4件です。

版区分項目(逐語)掲げた語句を含む句
2.1.287AddedAdded Claude Mods: plugins may now modify deeper behavior掲げた語句なし
2.1.287AddedAdded You should know, a built-in mod where a side agent watches your back and flags things you or Claude might miss. Turn it on with /plugin enable cc-plugin-you-should-know@builtin (for first-party sessions with telemetry on)掲げた語句なし
2.1.287AddedAdded an n:<text> filter to the agents view that matches session names and tasks; a filter now shows matches in collapsed sections and Enter opens the first match掲げた語句なし
2.1.287AddedAdded prompt_text to the OpenTelemetry user_prompt event, a copy of prompt for backends that nest dotted keys; drop or mask it wherever you drop or mask prompt (anthropics/claude-code#70763)掲げた語句なし
2.1.287AddedAdded URL prompts from MCP servers on the 2025-11-25 protocol, for example to sign in. If a server no longer connects after this update, add "bareElicitationCapability": true to its MCP config entry掲げた語句なし
2.1.287Windows: AddedWindows: Added a startup warning when denying the Bash tool also turns off the PowerShell tool, so Claude has no shell toolAdded a startup warning when denying the Bash tool also turns off the PowerShell tool, so Claude has no shell tool
2.1.287Self-hosted runner: AddedSelf-hosted runner: Added a built-in gh api (REST only) for sessions that use Anthropic-managed git on macOS and Linux machines where the GitHub CLI is not installedfor sessions that use Anthropic-managed git on macOS and Linux machines where the GitHub CLI is not installed
2.1.287ChangedChanged a shell write through a repo-committed symlink onto a sensitive file or out of the working tree to name where it lands and wait for a person, on lines with a ~ target too掲げた語句なし
2.1.287ChangedChanged Opus 4.7+ and Fable to use a 1M context window by default on Bedrock, Vertex, Foundry and the Claude apps gateway, with no [1m] suffix (CLAUDE_CODE_DISABLE_1M_CONTEXT=1 keeps 200K)Changed Opus 4.7+ and Fable to use a 1M context window by default on Bedrock, Vertex, Foundry and the Claude apps gateway, with no [1m] suffix … CLAUDE_CODE_DISABLE_1M_CONTEXT=1 keeps 200K
2.1.287ChangedChanged replies from claude agents to arrive as queued messages; slash commands other than /stop sent while a turn is running now run when it ends掲げた語句なし
2.1.287ChangedChanged whole-tool Bash allow rules and allowing hooks to prompt for, not run, shell writes to files Claude Code's file tools refuse outright (the Anthropic profile store, the host credentials file)掲げた語句なし
2.1.287ChangedChanged right-click paste on Windows and Linux, and middle-click paste on Linux, to happen when the button is released; moving the pointer away before releasing cancels it掲げた語句なし
2.1.287ChangedChanged MCP server alwaysLoad: false to defer all of that server's tools behind tool search掲げた語句なし
2.1.287ChangedChanged screen reader mode to write new or changed lines without first pausing with the cursor at the start of the line; set CLAUDE_AX_PREPARK_MS=50 to restore the pauseset CLAUDE_AX_PREPARK_MS=50 to restore the pause
2.1.287ChangedChanged automatic model switches after a flagged message to keep your current effort level instead of the new model's default掲げた語句なし
2.1.287ChangedChanged waiting permission prompts to show oldest first, so a new prompt no longer covers the one you're reading (prompts with a countdown still open on top)掲げた語句なし
2.1.287[VSCode] Added[VSCode] Added "Run in background" to a running command or sub-agent, to move it to the background and keep working掲げた語句なし
2.1.287[VSCode] Added[VSCode] Added the output of background shells and Monitors to their cards in the agent map掲げた語句なし
2.1.287[VSCode] Changed[VSCode] Changed the Claude in Chrome "Enabled by default" switch to also connect the editor's own sessions, which still ask before browser actions掲げた語句なし

2.1.286

2.1.286 の節は88項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は23件、掲げた語句を含む項目は1件です。

版区分項目(逐語)掲げた語句を含む句
2.1.286AddedAdded a count such as "2 of 5" to the permission prompt when several permission requests stack up掲げた語句なし
2.1.286AddedAdded mouse support for the "N more" rows of lists in fullscreen mode: click one to jump to that end of the list, with hover and pressed states掲げた語句なし
2.1.286ChangedChanged prompts sent while nothing is running or queued to show in the normal text color right away instead of gray掲げた語句なし
2.1.286ChangedChanged how failed API requests are retried: one limit now covers a whole model call, so with the default retry settings a failing call sends at most 14 requests掲げた語句なし
2.1.286ChangedChanged --bare to connect only the MCP servers named on the command line, send the model no system reminders, and start no background tasks; under --bare, a shell command that reaches its timeout now stops instead of moving to the background掲げた語句なし
2.1.286ChangedChanged the send-now key (ctrl+enter) to move a skill's own shell command to the background instead of ending it掲げた語句なし
2.1.286ChangedChanged the WebFetch error for a rate-limited domain safety check to tell Claude not to retry it in a loop掲げた語句なし
2.1.286ChangedChanged plugin installs to refuse npm sources that are git repositories or folders, and to install plugin dependencies only from registry packages掲げた語句なし
2.1.286ChangedChanged list screens (/artifacts, /mcp, /skills, /hooks and others) to always line up each row's details in one column after the names掲げた語句なし
2.1.286ChangedChanged the overflow rows of lists to read "↑ N more" / "↓ N more" instead of "N more above" / "N more below"掲げた語句なし
2.1.286ChangedChanged /hooks to open on one list of your configured hooks grouped by event, so viewing a hook takes one Enter instead of three掲げた語句なし
2.1.286ChangedChanged the theme picker to a scrolling list that fits your terminal instead of pushing the preview off screen; number keys no longer pick a theme掲げた語句なし
2.1.286ChangedChanged /exit's Remove worktree to run after Claude Code stops the servers and shells it started there, which on Windows could keep the folder from being deleted掲げた語句なし
2.1.286ChangedChanged the claude-api skill's Managed Agents examples to create environments with limited networking掲げた語句なし
2.1.286RemovedRemoved the browser link from /ultrareview and claude ultrareview output掲げた語句なし
2.1.286[VSCode] Added[VSCode] Added bookmarks: save Claude's responses and keep them in view in a Bookmarks side panel掲げた語句なし
2.1.286[VSCode] Added[VSCode] Added the questions Claude asks and your answers to the conversation: after you answer a question card, a Questions row shows each question with your picks掲げた語句なし
2.1.286[VSCode] Added[VSCode] Added option previews to question cards in the chat panel: the highlighted choice's mockup or snippet shows beside or under the options掲げた語句なし
2.1.286[VSCode] Added[VSCode] Added rows under a message that open to the terminal output, browser tab, browser instructions and selected code sent with it掲げた語句なし
2.1.286[VSCode] Changed[VSCode] Changed Stop and Escape to end only the current turn; background agents keep running and can be stopped one by one from the agent map掲げた語句なし
2.1.286[VSCode] Changed[VSCode] Changed the "✻ Claude Code" status bar item to show in every window, so you can open Claude when no file is open掲げた語句なし
2.1.286[Cloud sessions] Changed[Cloud sessions] Changed a routine's page to read "Due" with the scheduled time, instead of a next run time in the past, when a scheduled run is late and hasn't started掲げた語句なし
2.1.286[Claude Tag] Added[Claude Tag] Added an Add channel button to Claude Tag's spend limits page in admin settings, so a limit can be set on any channel, including a private one, from its channel ID or Slack link[Claude Tag] Added an Add channel button to Claude Tag's spend limits page in admin settings, so a limit can be set on any channel, including a private one, from its channel ID or Slack link

2.1.285

2.1.285 の節は136項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は33件、掲げた語句を含む項目は13件です。

版区分項目(逐語)掲げた語句を含む句
2.1.285AddedAdded CLAUDE_CODE_DISABLE_WEB_FETCH environment variable to turn off the WebFetch toolAdded CLAUDE_CODE_DISABLE_WEB_FETCH environment variable to turn off the WebFetch tool
2.1.285AddedAdded claude --desktop to open the Claude desktop app on the current directory, or on a session with --continue / --resume <id>掲げた語句なし
2.1.285AddedAdded claude plugin configure <plugin> to show a plugin's options and which are unset, or save new values read from stdin with --values-stdin掲げた語句なし
2.1.285AddedAdded <server>.<key>=<value> to claude plugin install --config, so a bundled .mcpb MCP server's own settings can be set at install time and it starts without visiting /plugin → ConfigureAdded <server>.<key>=<value> to claude plugin install --config, so a bundled .mcpb MCP server's own settings can be set at install time and it starts without visiting /plugin → Configure
2.1.285AddedAdded allowedProviders managed setting to limit which API providers a machine may use (Anthropic API, a custom endpoint, Bedrock, Mantle, Vertex AI, Foundry, Claude Platform on AWS, or a Cloud gateway)Added allowedProviders managed setting to limit which API providers a machine may use
2.1.285AddedAdded CLAUDE_CODE_NONSTREAMING_TIMEOUT_RETRIES environment variable to cap re-sends of a non-streaming fallback request that timed out掲げた語句なし
2.1.285ChangedChanged MCP tools so a tool that sets its own _meta['anthropic/alwaysLoad'] to false stays deferred when its --mcp-config, Agent SDK or plugin server is set to alwaysLoadChanged MCP tools so a tool that sets its own _meta['anthropic/alwaysLoad'] to false stays deferred when its --mcp-config, Agent SDK or plugin server is set to alwaysLoad
2.1.285ChangedChanged background Bash and PowerShell commands to stop after a time limit (their timeout with run_in_background, default 30 min, max 2 h); Claude is notified when one is stopped掲げた語句なし
2.1.285ChangedChanged Code Review's pull request reviews and /ultrareview to run when disableWorkflows is on, unless the machine running the review has it set by its own administrator (MDM or the managed-settings file)Changed Code Review's pull request reviews and /ultrareview to run when disableWorkflows is on, unless the machine running the review has it set by its own administrator
2.1.285ChangedChanged sessions behind a custom ANTHROPIC_BASE_URL to use the 1M context window of models that have one (Opus 4.7+, Sonnet 5+, Fable); run /autocompact 200k if your gateway stops at 200KChanged sessions behind a custom ANTHROPIC_BASE_URL to use the 1M context window of models that have one
2.1.285ChangedChanged Team and Enterprise sessions, and sessions whose sign-in plan Claude Code can't determine, to withhold WebFetch until the organization policy loads if it couldn't be loaded at startup掲げた語句なし
2.1.285ChangedChanged /memory so that Auto-memory can no longer be turned on from a background session or from a session one of Claude Code's own tools started; turning it off there still worksturning it off there still works
2.1.285ChangedChanged the one-time offer to make auto mode your default permission mode to also show on third-party providers and with telemetry off, when your user settings default to another mode掲げた語句なし
2.1.285ChangedChanged claude -p and Python Agent SDK sessions on third-party providers or with telemetry off to start in auto mode when no permission mode is configured, like interactive sessions; --permission-mode still overrides it--permission-mode still overrides it
2.1.285ChangedChanged Bedrock, Mantle and Claude Platform on AWS requests to a base URL with a non-default port to include the port in the SigV4-signed Host header掲げた語句なし
2.1.285ChangedChanged the MCP server name widgets to be reserved in cloud sessions and on self-hosted runners: your own server under it, or a close spelling such as widgets_, no longer loads, so rename ityour own server under it, or a close spelling such as widgets_, no longer loads, so rename it
2.1.285ChangedChanged /ultrareview on macOS and Linux to leave symbolic refs out when uploading a local checkout; a checkout whose current branch is a symbolic ref is now refused with an explanation掲げた語句なし
2.1.285Windows: ChangedWindows: Changed project and local settings env to no longer set ALLUSERSPROFILE, SystemDrive, or the CommonProgramFiles variables; set them in user or managed settings insteadChanged project and local settings env to no longer set ALLUSERSPROFILE, SystemDrive, or the CommonProgramFiles variables … set them in user or managed settings instead
2.1.285ChangedChanged /tasks to fold background work Claude Code runs for itself under one "System tasks" row; press Enter on it to show those tasks掲げた語句なし
2.1.285ChangedChanged /ultrareview on macOS and Linux to require git 2.31 or newer to upload a local repository; checkouts made with --separate-git-dir are now refused instead of being uploaded with an older method掲げた語句なし
2.1.285ChangedChanged /ultrareview uploads on macOS and Linux to send a partial clone as a working-tree snapshot on git 2.31 or newer, instead of falling back or refusing when git's version looked too old掲げた語句なし
2.1.285ChangedChanged /ultrareview uploads on macOS and Linux to refuse, instead of fetching, a partial clone missing some of its working tree's files on older git versions; a clone made without --filter uploads掲げた語句なし
2.1.285ChangedChanged Bedrock, Vertex and Mantle start-up model checks to identify themselves as Claude Code, like other Claude Code requests掲げた語句なし
2.1.285ChangedChanged claude mcp get to hide the command, arguments, and environment values of stdio MCP servers provided by plugins; variable names are still shown掲げた語句なし
2.1.285ChangedChanged /claude-api so it can no longer be run from Remote Control clients掲げた語句なし
2.1.285ChangedChanged /config chrome=true to direct you to the /config panel instead of enabling Claude in Chrome by default; /config chrome=false still turns it off when it was on/config chrome=false still turns it off when it was on
2.1.285ChangedChanged sandbox settings so project settings cannot widen or turn off an admin-required sandbox, replace the proxy behind a managed deny list, extend a strict allowlist, or reopen managed read-deniesChanged sandbox settings so project settings cannot widen or turn off an admin-required sandbox, replace the proxy behind a managed deny list, extend a strict allowlist, or reopen managed read-denies
2.1.285[VSCode] Added[VSCode] Added a note under a restored tab's last message when a window reload interrupted it and no reply will follow掲げた語句なし
2.1.285[VSCode] Added[VSCode] Added a plugin options form to Manage plugins: installing a plugin that has options asks for the unset ones, and a gear on its row changes them later掲げた語句なし
2.1.285[VSCode] Added[VSCode] Added an on-demand diagnostics tool so Claude in the panel can read the Problems panel's current errors and warnings at any time, not only right after it edits a file掲げた語句なし
2.1.285[VSCode] Changed[VSCode] Changed the Manage plugins dialog to ask before removing a marketplace or turning off a plugin that your project's shared .claude/settings.json turns on掲げた語句なし
2.1.285[Cloud sessions] Changed[Cloud sessions] Changed MCP_DISCOVERY_CACHE=1, when set in your cloud environment's variables rather than a settings file, to reuse your connectors' tool lists after a session restart; other MCP servers are no longer cached and connect at startup[Cloud sessions] Changed MCP_DISCOVERY_CACHE=1, when set in your cloud environment's variables rather than a settings file, to reuse your connectors' tool lists after a session restart
2.1.285[Claude Tag] Added[Claude Tag] Added direct messages with Claude for members on an Enterprise plan Standard or Usage-Based Chat seat who also have Cowork; a seat that includes Claude Code is no longer required掲げた語句なし

2.1.284

2.1.284 の節は100項目で、うち行頭の語が Added・Changed・Removed・Deprecated の項目は25件、掲げた語句を含む項目は3件です。

版区分項目(逐語)掲げた語句を含む句
2.1.284AddedAdded Claude Sonnet 5.5 (claude-sonnet-5-5), now the default Sonnet model on the Anthropic API — 1M context, $2/$10 per Mtok with $0.20/Mtok cache reads掲げた語句なし
2.1.284AddedAdded a "Yes, but ask again next time" answer to auto mode's prompt before a read outside the working directories, so you can allow that one read and still be asked about later ones掲げた語句なし
2.1.284AddedAdded dollar amounts to the Claude apps gateway spend limit in /usage and the status line (for example "$271.40 / $500.00 spent this month") when the gateway runs this version or later; the status line's rate_limits.spend_limit also gains used_usd, limit_usd and period掲げた語句なし
2.1.284AddedAdded effortSlider:decreaseEffort, increaseEffort and toggleUltracode keybinding actions, so the /effort slider's arrow and Tab keys can be rebound in keybindings.jsonAdded effortSlider:decreaseEffort, increaseEffort and toggleUltracode keybinding actions, so the /effort slider's arrow and Tab keys can be rebound in keybindings.json
2.1.284AddedAdded /rate-limit-options to /help and the command menu for claude.ai subscribers, so the usage-limit notices that mention it point to a command you can find掲げた語句なし
2.1.284AddedAdded /mcp reconnect all in the interactive terminal to retry every MCP server that failed to connect or needs authentication at once掲げた語句なし
2.1.284AddedAdded Claude apps gateway startup warnings when a managed policy's availableModels is empty, or leaves out the model Claude Code starts on without setting model or enforceAvailableModels掲げた語句なし
2.1.284AddedAdded auth: { google: {} } for Claude apps gateway telemetry.forward_to destinations, so telemetry can be exported straight to Google Cloud's OTLP endpoint using the gateway's Google Cloud credentials掲げた語句なし
2.1.284AddedAdded certificate client authentication (private_key_jwt) between the Claude apps gateway and its identity provider, for identity providers that issue certificate credentials instead of client secrets掲げた語句なし
2.1.284ChangedChanged interactive terminal and VS Code sessions to start in auto mode when no permission mode is configured, on every plan and provider; permissions.defaultMode still overrides itpermissions.defaultMode still overrides it
2.1.284ChangedChanged Ultracode into its own toggle in /effort (Tab, or /effort ultracode [on|off]): it no longer forces xhigh effort and stays on at any effort level掲げた語句なし
2.1.284ChangedChanged retries after a dropped connection mid-response to share one budget with the rest of the request's retries, so a failing request gives up sooner掲げた語句なし
2.1.284ChangedChanged the notice shown when a Sonnet model's safeguards flag a message to explain why it happened and to offer editing and retrying掲げた語句なし
2.1.284ChangedChanged safety-related model switches in sessions that pin an Opus model with ANTHROPIC_DEFAULT_OPUS_MODEL or modelOverrides: on the Anthropic API, the API now picks the model to switch to for each kind of flag, not the pinned model掲げた語句なし
2.1.284ChangedChanged the non-interactive first turn to still wait up to 2s for connecting MCP servers named by --allowedTools or an mcp_tool hook, even when CLAUDE_CODE_MCP_STARTUP_WAIT_MS is 0掲げた語句なし
2.1.284ChangedChanged /recap to decline with a short notice when it arrives relayed from a chat thread (your own included) or from a routine or webhook; typed in the terminal, the Claude apps, Remote Control, -p or an SDK host, it runs as before掲げた語句なし
2.1.284ChangedChanged /artifacts to show its filter tabs beside the title with one-word labels (All, Mine, Shared), using the same tab bar as /config and /plugin掲げた語句なし
2.1.284ChangedChanged artifact publishing to refuse a file on a network share (a \\host\share path or a /net automount) unless it is on a mapped network drive added with --add-dirunless it is on a mapped network drive added with --add-dir
2.1.284[VSCode] Added[VSCode] Added an optional time above each prompt and response, with a date line where the day changes (Claude Code: Show Message Timestamps setting, off by default)掲げた語句なし
2.1.284[VSCode] Added[VSCode] Added plugin load errors and notes to the Manage plugins rows, with a popup to disable, uninstall or copy the error掲げた語句なし
2.1.284[VSCode] Added[VSCode] Added an Ultracode on/off switch under the Effort slider, replacing the slider's Ultracode stop; the model pill shows "· Ultracode" at any effort level掲げた語句なし
2.1.284[VSCode] Changed[VSCode] Changed CLAUDE_CONFIG_DIR in the claudeCode.environmentVariables setting to apply only when it is an absolute path, and passed it to terminals that continue the chat掲げた語句なし
2.1.284[Claude Tag] Added[Claude Tag] Added model family choices such as "Opus (latest)" for a thread, a channel default or your DM, so the choice follows the newest model in that family掲げた語句なし
2.1.284[Claude Tag] Added[Claude Tag] Added the spend that counts toward your organization-wide limit to the analytics spend projection chart, with how much of the limit is used掲げた語句なし
2.1.284[Claude Tag] Changed[Claude Tag] Changed Claude to post its private sign-in notice at every @mention from someone who hasn't connected their Claude account, instead of going quiet after the first掲げた語句なし

この記事の数字から何が言えて、何が言えないか

言えるのは、2つの時点の CHANGELOG.md の差が13版・1,110項目で、そのうち行頭の語が Added・Changed・Removed の項目が223件、この記事が掲げた20の語句のいずれかを含む項目が42件だったことです。読者の環境で設定を変える必要があるかどうかは、この数字からは言えません。

言えること:

言えないこと:

  1. 42件は、設定の操作を述べた項目の数ではありません。語句の文字列の一致だけで数えており、語句の一覧を変えれば件数も変わります
  2. 181件の「掲げた語句なし」は、その項目が設定と無関係であることを示しません。Added `CLAUDE_CODE_WORKFLOW_SUBAGENT_MODEL` to run every workflow agent on one model ... のように、項目そのものが環境変数の追加を述べていても、掲げた語句を含まなければ「掲げた語句なし」になります
  3. Fixed・Improved・Reverted・Updated の887件に、掲げた語句があるかどうか。この記事はこの887件を照合していません
  4. 各版の公開日・公開月。この記事が示した時刻は、節が CHANGELOG.md に載っていた時点です
  5. 項目の件数と変更の大きさの関係。表の件数は行の数で、各項目の内容の大きさは数えていません
  6. CHANGELOG.md に書かれていない変更。この記事が読んだのは CHANGELOG.md の1ページで、版ごとのプログラムそのものではありません

この記事はどう更新するか

毎月、CHANGELOG.md を取り直し、2026年10月14日 09:25:56 JST の取得版に無い版を同じ数え方と同じ20の語句で足して、最終確認日を更新します。

版ごとの件数の表は全期間を残し、追加・変更・削除の逐語の表をどの期間まで残すかは更新時に決めます。記事が長くなりすぎる場合は、逐語の表を直近の期間に絞ることがあります。

記載に誤りがある場合、また確認してほしい項目がある場合はお問い合わせからご連絡ください。

この記事は何を出典にしているか

  1. Anthropic|Claude Code CHANGELOG.md(GitHub)(2026-10-14 09:25:57 JST に到達を確認、HTTP 200。本文の内容は次の raw.githubusercontent.com から取得)
  2. Anthropic|Claude Code CHANGELOG.md(raw、main 表記)(2026-10-14 09:25:56 JST 取得、HTTP 200。先頭の版 2.1.296、版番号の見出し418個。対象の13版の節と、公開日の記載の有無)
  3. Anthropic|Claude Code CHANGELOG.md(raw、main 表記)(2026-09-28 01:10 JST 取得、HTTP 200。先頭の版 2.1.283、版番号の見出し405個。比較の起点。同じ URL の当時の内容)
  4. Internet Archive|CHANGELOG.md(main 表記、2026-09-25 12:56:43 UTC 保存)(2026-10-14 取得、HTTP 200。先頭の版 2.1.282)
  5. Internet Archive|CHANGELOG.md(refs/heads/main 表記、2026-09-30 20:01:40 UTC = 2026-10-01 05:01:40 JST 保存)(2026-10-14 取得、HTTP 200。先頭の版 2.1.286。ブランチ名 main を refs/heads/main と書いた URL で、main 表記と同じリポジトリの同じファイルを指す)
  6. Internet Archive|CHANGELOG.md(refs/heads/main 表記、2026-10-12 00:41:55 UTC = 2026-10-12 09:41:55 JST 保存)(2026-10-14 取得、HTTP 200。先頭の版 2.1.296。2026-10-14 の main 表記の取得版とバイト単位で一致)
  7. Internet Archive|CHANGELOG.md(main 表記)の保存版の一覧(CDX、2026-09-26 以降)(2026-10-14 取得。0件)
  8. Internet Archive|CHANGELOG.md(main 表記)の保存版の一覧(CDX、2026-09-01 以降)(2026-10-14 取得。4件、保存日時は 2026-09-07、09-10、09-22、09-25 UTC、いずれも HTTP 200 の保存)
  9. Internet Archive|CHANGELOG.md(refs/heads/main 表記)の保存版の一覧(CDX、2026-09-01 以降)(2026-10-14 取得。7件、保存日時は 2026-09-13、09-15、09-18、09-19、09-24、09-30、10-12 UTC、いずれも HTTP 200 の保存)
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