Claude Code

- Added `/claude-api api-version` to move Claude API code to API version `2026-10-21` - Added the `claude_code.safety_event` OpenTelemetry event for each tool call a permission rule, auto mode, a safety check, a hook or the sandbox stopped, prompted or sent back - Fixed requests failing with a model-not-found error when `CLAUDE_CODE_DISABLE_1M_CONTEXT` is set and the model is an alias with the `[1m]` suffix, such as `opus[1m]` - Fixed the `prompt-caching-scope` beta header being sent behind custom `ANTHROPIC_BASE_URL` gateways and on Foundry, where it has no effect - Fixed MCP servers showing ...

- Added `sandbox.allowNestedUserNamespaces` so sandboxed commands on Linux can create user namespaces (Chromium, rootless podman); this lets them get around the sandbox's file protections - Added `CLAUDE_CODE_RETRY_WATCHDOG_USAGE_LIMIT_RECHECK_MS` so unattended retry mode (`CLAUDE_CODE_RETRY_WATCHDOG`) notices a usage limit that was lifted before its reset - Fixed every request failing on Vertex, Bedrock and other providers when the endpoint or a gateway rejects tool search, and behind gateways with ToolSearch disallowed or left out of `--tools` (a 2.1.304 regression): Claude Code now retries ...

- Added `CLAUDE_CODE_AUTO_MODE_MODEL` to choose the model the client-side auto mode classifier uses; it does not change the model for server-side auto mode - Added an `Idle compaction` row to `/config` for turning idle compaction off or back on; the notices shown after an idle compaction now say how to turn it off - Added a notice to `/design-sync` and `/design-login` that standalone Claude Design (claude.ai/design) closes by December 14, 2026 - Fixed a "Prompt is too long" error when stopping a turn while the conversation was being compacted - Fixed requests failing with "diagnostics: Extra i...

- Added `CLAUDE_CODE_RETRY_WATCHDOG_MAX_USAGE_LIMIT_WAIT_MS` so unattended retry mode (`CLAUDE_CODE_RETRY_WATCHDOG`) ends a request at a usage limit that resets too far away instead of waiting - Added OpenTelemetry tracing guidance to the `claude-api` skill, including setting up trace destinations with the `ant` CLI - Added the `%` motion to vim mode: jump to the matching bracket, alone or with d/c/y - Added `rows` to a mod's `Input`: a text field of several lines in the terminal, where Enter submits and Shift+Enter or a backslash before Enter starts a new line - Added `classifier_verdict` and...

- Added `virtualText` to a mod's prompt decorations: text drawn in the prompt box that never enters the draft or the submitted prompt - Added `cache_creation_5m_tokens` and `cache_creation_1h_tokens` to the OpenTelemetry `api_request` event, splitting cache writes by lifetime - Added `$.ui.view({ agentId })` for mods: shows an agent's transcript in the main view when you ask, and `$.ui.view({})` goes back - Added a `dir` prop on a mod's `Text` for right-to-left text: on Windows and in VS Code's terminal its rows read in that direction and sit flush right - Added `/advisor` on Claude Platform o...

- Added `CLAUDE_CODE_DISABLE_FILE_MENTIONS` environment variable: Claude gets the paths of `@` file mentions to read with its file tools, not the files' contents - Added idle compaction in the terminal: a 200K+ token conversation left idle for about 54 minutes is compacted before its one-hour prompt cache expires, so your next message doesn't reprocess it all - Added `CLAUDE_CODE_IDLE_COMPACT_MIN_TOKENS` to change idle compaction's 200K-token minimum; `"idleCompaction": false` in settings.json turns it off. Both need v2.1.290 or later - Added `$.prompt.media` so a `prompt.submit` hook of a mod...

- Added 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 - Added `autoCompactWindow` to subagent frontmatter and `--agents` definitions, so a subagent can auto-compact earlier than the main conversation's window - Added `CLAUDE_CODE_WORKFLOW_SUBAGENT_MODEL` to run every workflow agent on one model while other subagents keep theirs - Added `CLAUDE_CODE_OVERLOADED_RETRY_MAX_DELAY_MS` environment variable to set a longer maximum delay for the backoff wh...

- Added `--marketplace ` 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 - Added an `effort` parameter to the Agent tool, so Claude runs a sub-agent at the effort level you ask for - Added `CLAUDE_CODE_OVERLOADED_RETRY_BASE_DELAY_MS` environment variable to set a longer base delay for the backoff when retrying an overloaded (529) request - Added `prompt.autocomplete`, an event a mod hooks to add its own rows to the prompt box's autocomplete list - Added prompt caching to `$.model.compl...

- Added Claude Mods: plugins may now modify deeper behavior - Added 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) - Added an `n: ` 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 - Added `prompt_text` to the OpenTelemetry `user_prompt` event, a copy of `prompt` for backends that nest dotted keys; drop or mask it wherever yo...

- Added a count such as "2 of 5" to the permission prompt when several permission requests stack up - Added 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 - Fixed several Claude Code processes and IDE extensions each opening a login browser when gcpAuthRefresh or awsAuthRefresh credentials expire - Fixed `claude --resume` and `--continue` sometimes losing every turn after a batch of parallel tool calls when the earlier session crashed or was killed - Fixed API 400 errors after a tool or hook returned an ...

- Added `CLAUDE_CODE_DISABLE_WEB_FETCH` environment variable to turn off the WebFetch tool - Added `claude --desktop` to open the Claude desktop app on the current directory, or on a session with `--continue` / `--resume ` - Added `claude plugin configure ` to show a plugin's options and which are unset, or save new values read from stdin with `--values-stdin` - Added ` . = ` 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 - Added `allowedProviders` managed setting to limit which...

- Added `x-claude-code-prompt-id` to the gateway hint headers so LLM gateways can group the requests that serve one user prompt; opt in with `CLAUDE_CODE_GATEWAY_HINT_HEADERS=1` - Added `availableModelsMatch` managed setting: with `"exact"`, an `availableModels` entry allows only the model version it names, so new releases stay blocked until listed - Added `deniedModels` managed setting to block specific models, even when `availableModels` allows them - Added MCP tool, WebFetch and WebSearch outputs to the `tool.output` OpenTelemetry span event when `OTEL_LOG_TOOL_CONTENT=1` - Added `/doctor p...

- Added a `maxProseWidth` setting that caps the width of Claude's prose in wide terminals while tables and code blocks keep the full width - Added a startup notice, and `/status` and `claude doctor` entries, listing telemetry variables in a project's settings files that were ignored or that turned telemetry off - Added the `allowClaudeInChromeWithManagedMcp` managed setting to let `claude --chrome` run alongside an exclusive `managed-mcp.json`; the error shown when Chrome is blocked now names it - Added `store.readiness_grace_seconds` to the Claude apps gateway so `/readyz` can stay ready thro...

- Added Claude apps gateway support for newer Claude Desktop keys in `desktop` policy blocks, including `blockReadsOutsideWorkingDirectories` and `disableBypassPermissionsMode` - Added `assume_role` on Claude apps gateway Bedrock upstreams: the gateway calls Bedrock as an IAM role it assumes through STS, in another AWS account if needed, optionally one session per developer - Added `guardrail: {id, version}` on Claude apps gateway Bedrock upstreams to apply an Amazon Bedrock guardrail to every request sent through them (set it on all Bedrock upstreams or none) - Added `telemetry.resource_attri...

- Added Claude Opus 5.5 (`claude-opus-5-5`), now the default Opus model — 1M context, $4/$20 per Mtok with $0.20/Mtok cache reads - Added mouse support to more lists in fullscreen mode: the wheel scrolls the `/skills` list, and a skill's state options in `/plugin` can be clicked - Added `CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH` to change the 2,048-character cap on MCP tool descriptions and server instructions for every MCP server in the session - Added hook output sizes and the number of oversized outputs saved to a file to the `hook_execution_complete` OpenTelemetry event - Fixed writes throug...

- Added a visible warning when memory usage is critical, with steps to free memory or restart safely - Added `CLAUDE_CODE_MCP_STARTUP_WAIT_MS` to bound how long the first non-interactive turn waits for connecting MCP servers (`0` = don't wait) - Added `effort` attribute to the `claude_code.llm_request` OpenTelemetry trace span, matching the `api_request` event - Added `claude_code.managed_settings_resolved` OTel event: managed-settings sources and policy helper state; redacted settings and digests with `OTEL_LOG_MANAGED_SETTINGS=1` - Added `store.connect_timeout_seconds` to the Claude apps gat...

- Added fast mode in Claude Code Remote sessions (cloud and self-hosted runners): the host's fast-mode setting or `/fast` typed in the session applies where your organization allows it - Added mouse support to the `/config` panel in fullscreen mode: the wheel scrolls the settings list, a click on a setting's value changes it, and the row under the pointer is highlighted - Added `claude self-hosted-runner --drain-marker-file `: when that file exists at a SIGTERM drain, the runner reports its exit to the server as a host drain (telemetry only) - Added per-command `allowed_domains` to Bash, Power...

- Added `claude plugin eval`: run a plugin's eval suite against Claude Code and get scored, reproducible results (JSON + HTML report); see `claude plugin eval --help` - Added `/output-style [name]` to list and switch output styles, including over Remote Control and in cloud and other headless sessions - Added a diff of the files a Bash command changed to the Bash tool result when the Bash tool handles file edits (setting `bashEditDiffEnabled`) - Added `OTEL_METRICS_INCLUDE_REPOSITORY` to tag OpenTelemetry metrics and events with `vcs.*` repository attributes; commit events get `vcs.ref.head.*`...

- Added to the Claude apps gateway: with `pricing:` set in `gateway.yaml`, signed-in Claude Code clients receive the same rates through managed settings, so `/cost` and telemetry match the spend meter - Added a startup warning for gateways when `access_control.allow_cidrs` is empty, and a one-time warning the first time a request arrives from a public address - Added the `gatewayInternalNetworks` managed setting, letting administrators allow `/login` to a Claude apps gateway on their organization's own public IPv4 block - Added `claude self-hosted-runner --remove-session-state` (default off): ...

- Added `maxEffortLevel` setting (top-level or per model under `modelSettings`): caps the effort level on every provider, including Bedrock, Vertex and Foundry; users can still pick a lower level - Added `--system-prompt-snapshot off` to render the system prompt fresh on every request instead of reusing the conversation's recorded prompt (for iterating on prompt text) - Fixed Cowork scheduled tasks in the cloud failing at startup for organizations whose managed settings require sandboxing - Fixed `/context` and other local command output rendering blank on mobile clients - Fixed shift+enter an...

- Added `user.email` and `user.groups` to the telemetry Claude Desktop and Cowork send through a Claude apps gateway, matching terminal sessions - Added support for pointing `--plugin-dir` at a folder of plugins: each child folder with a manifest loads, and children added or removed while running are picked up - Added a 1 GB cap on tool results saved to disk; the in-conversation preview says when a saved file was truncated - Fixed resuming a foreground-spawned subagent changing its tool list and system prompt prefix, which broke prompt-cache reuse for that agent - Fixed agent teammates and res...

- Added an "Organization policy" line to `/status` and `claude doctor` that says why your organization's policy could not be loaded, such as a proxy not passing the endpoint through - Added `bashOutputMaxChars` and `taskOutputMaxChars` settings to raise how much command and background-task output Claude receives inline before it is saved to a file, up to 128K characters - Added `--append-subagent-system-prompt-file` to read the subagent system prompt from a file, for prompts too large to pass on the command line - Added `/skill-doctor` to show which loaded skills go unused and what they cost i...

- Added a diff panel that opens beside the conversation in fullscreen mode and shows your uncommitted changes as Claude edits; toggle it with `/diff` - Added a likely cause for prompt-cache misses (e.g. tool definitions or system prompt changed, idle past the TTL) to `/cost` and the status line's `prompt_cache` field - Added `/reload-plugins` to headless sessions, so it appears in the Claude Code Desktop and SDK command lists - Added a text form of `/advisor` (`/advisor`, `/advisor `, `/advisor off`) for the desktop app, Remote Control, and other headless (`-p`/Agent SDK) sessions - Added `oid...

- Added `managedMcpServers` managed setting: organizations can provide HTTP/SSE MCP servers to every user (same entry shape as `.mcp.json`); entries that name a command to run are skipped - Added `--permission-prompts none` for unattended headless hosts: anything that would prompt is denied automatically while the active permission mode (including auto mode) keeps deciding - Added recognition of `glab mr create/merge/close/reopen/note/update` so GitLab merge requests show as `MR !N` in the collapsed tool summary and refresh the footer MR badge - Added `--json` to `claude plugin validate` for a...