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33> Release notes for Claude Desktop

5<Update label="v2.19675.0" description="2026-10-01">

6 Bundled Claude Code version: 2.1.286.

8 **General**

10 * Fixed a crash when opening a tool step whose details list a word such as "constructor".

11 * Fixed a message that failed to send sometimes looking sent, with Claude still working, or disappearing if you had already started typing the next one; a message that cannot be sent now offers Retry.

12 * Fixed conversations failing with a request error on every later message after a connector, tool or hook returned an unusually shaped result.

13 * Fixed Quick Entry on macOS discarding your message when an attached file had been moved, deleted, or could not be read before you sent it; the message is now sent without that file and a notice says so.

14 * Fixed the Windows app failing to start when the Google or Chrome folder under `LocalAppData` is a junction.

15 * Removed computer use on macOS 13 and earlier, where its screenshots could never be taken; it requires macOS 14 or later. The Computer use section in Settings now stays visible and explains why when computer use is unavailable.

17 **Code**

19 * Added comments on lines of an open file in the Files pane: click the + beside a line, or select text and choose Add comment, and the comment is sent with your next message.

20 * Fixed a finished session showing as working again after a model switch, a built-in slash command such as `/plan`, or a `!` command Claude did not answer, which could hide the usage-limit notice, make Try again send an extra message, or count a resumed turn's time from the wrong point.

21 * Fixed a session preset's permission mode not being applied when the preset also changed the model.

22 * Fixed Claude not being able to run commands in the Terminal panel on Windows.

23 * Fixed new sessions in organizations with Claude Code zero data retention keeping their first few words as their name; they now get a generated title a few seconds after they start.

24 * Fixed Claude Code failing to start on some Macs right after a desktop update.

26 **Cowork**

28 * Fixed a reply still showing as waiting on you after its sign-in request had expired.

29 * Fixed a tool request that was restored without its details being approvable before the details arrived; its card now waits for them and offers only Deny.

30 * Fixed Claude clicking the wrong item, missing an open menu, or bringing the app to the front in apps such as Slack while working in the background.

31 * Fixed network requests failing on corporate networks where the proxy is set by a one-word host name, and the sandbox being left without a proxy until the app restarted when the proxy auto-config (PAC) file failed to download, such as right after a VPN switch.

32 * Changed scheduled tasks that Claude creates for you to use "Automatically approve" by default where your organization allows it, so their runs use tools without asking first and pause only when something looks unsafe.

34 **3P**

36 * Added Excel, Word and PowerPoint previews in the Code tab when Claude's workspace isn't running yet: Excel opens in the document viewer, and opening a Word or PowerPoint file starts the workspace.

37 * Added the Linux spellcheck dictionary download to the Egress Requirements list; on Linux, `disableNonessentialServices` now also skips that download and turns spellcheck off.

38 * Changed the default context window for Opus 4.7 and later, Sonnet 5 and later, and Fable 5 and later to 1M tokens behind a gateway or custom base URL; previously 200K unless the "1M context" option was picked.

39</Update>

541<Update label="v2.16120.0" description="2026-09-29">

642 Bundled Claude Code version: 2.1.284.

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153153 </Accordion>

154154

155155 <Accordion title="inferenceProvider details">

156 The app activates 3P mode only when this is set and the required credential keys for the selected provider are present and valid; otherwise it launches in standard mode. Keys for providers other than the selected one are ignored. Each provider's required keys are documented on its dedicated page under Inference providers.

156 Setting this key asks for 3P mode. The app opens in 3P mode unless the user chose to sign in to Claude.ai at the login screen, a choice `disableDeploymentModeChooser` removes. In 3P mode, if the selected provider's required credential keys are missing or invalid, the app shows a configuration error. A value the app cannot read (a misspelt, wrongly cased or unknown provider, or a value of the wrong type) still counts as set when machine-wide device management sent it: a macOS configuration profile, Windows policy under `HKLM`, or the root-owned policy file on Linux. The app then asks for 3P mode and, in 3P mode, shows a configuration error whose details name this key. An unreadable `bootstrapUrl` from the same sources counts the same way unless `bootstrapEnabled` is `false`. An unreadable value does not count where the user can write it: the local configuration file, or Windows policy under `HKCU`. Neither does an empty value (a value of only spaces is unreadable, not empty), or a Windows value of type `REG_BINARY`, `REG_MULTI_SZ` or `REG_QWORD`. Each of those reads as not set. When this key is not set, the app launches in standard mode unless another setting asks for 3P mode, such as a `bootstrapUrl` that `bootstrapEnabled` has not turned off. Keys for providers other than the selected one are ignored. Each provider's required keys are documented on its dedicated page under Inference providers.

157157 </Accordion>

158158</AccordionGroup>

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856| Block nonessential services `disableNonessentialServices` | `boolean` | MDM + Bootstrap Added in 1.2581.0 | `false` | Connector favicons, artifact-preview and MCP Apps iframes, and the Linux spellcheck dictionary. Connector widgets fall back to text; spellcheck is off on Linux. Defaults to `false`. |

857857

858858<AccordionGroup>

859859 <Accordion title="deploymentOrganizationUuid details">

860 If unset, a shared placeholder UUID is used: telemetry can’t be distinguished from other unconfigured deployments, and local data is stored under the placeholder. **Changing this value orphans data** stored under the previous value (sessions, skills, plugins).

860 If unset, the app uses the organization of your Anthropic sign-in, where the connection has one. Otherwise, telemetry is tagged with a value the app derives from your connection settings. Where it cannot derive one, telemetry is tagged with a placeholder UUID shared with other unconfigured deployments. In the last two cases, local data is stored under the placeholder. **Changing this value orphans data** stored under the previous value (sessions, skills, plugins).

861861 </Accordion>

862862

863863 <Accordion title="disableEssentialTelemetry details">

864 "Essential" means the signals Anthropic needs to keep your deployment working: **crash stacks**, **startup failure reasons**, and **version/OS metadata**. No prompts, completions, file contents, or identifiers beyond a random install ID.

864 "Essential" means the signals Anthropic needs to keep your deployment working: **crash stacks**, **startup failure reasons**, **version/OS metadata**, and **crash dumps** (each an unfiltered copy of part of the app's memory). Reports carry a random install ID and an organization ID. The organization ID is the one you set, one the app takes from your Anthropic sign-in or derives from your connection settings, or a placeholder shared with other unconfigured deployments. Reports can also include a summary of your settings, the host names of addresses you configured, text you set for display (such as the display name, subtitle, and banner text and link), and a one-way digest of a session ID.

865865

866866 **What you lose when this is on:** when a Claude Desktop build hits a bug that only reproduces on your OS version or locale, Anthropic can't see it unless a user manually reports. Fixes ship slower.

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875875 </Accordion>

876876

877877 <Accordion title="disableNonessentialServices details">

878 "Nonessential services" covers three outbound fetches the app runs without: **connector favicons** (the icon proxy), the **artifact-preview** iframe origin, and the **MCP Apps widget** iframe origin (`*.claudemcpcontent.com`). Turning this on blocks all three.

878 "Nonessential services" covers these outbound fetches the app runs without: **connector favicons** (the icon proxy), the **artifact-preview** iframe origin, the **MCP Apps widget** iframe origin (`*.claudemcpcontent.com`), and the **spellcheck dictionary** the built-in spellchecker downloads on Linux. Turning this on blocks all of them. (macOS and Windows use the system spellchecker. Windows still downloads a dictionary for a language it cannot check natively; this key does not stop that download.)

879879

880 **What you lose when this is on:** connectors show without icons, artifacts do not render in conversations, and connectors that return MCP Apps show the text tool result instead of the widget.

880 **What you lose when this is on:** connectors show without icons, the hosted artifact preview frame does not load (artifacts still render locally, without the CDN chart libraries they can otherwise load), connectors that return MCP Apps show the text tool result instead of the widget, Excel files in the Code tab preview only through Claude’s workspace (the local VM) instead of that frame, and spellcheck underlines are off on Linux.

881881

882882 Destinations are listed under Egress Requirements → Nonessential services.

883883 </Accordion>

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55Configuration keys by Claude Desktop release. Each section lists keys added in that release, with the MDM key name (for plist/registry deployment) and the equivalent JSON shape (for local-file or bootstrap remote configuration).

7<Update label="v2.19675.0" description="2026-10-01">

8 No configuration changes in this release.

9</Update>

711<Update label="v2.16120.0" description="2026-09-29">

812 <div className="cfg-keys">

913 | MDM key | Type | Description |

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252252| `cdn.jsdelivr.net` | Artifact preview asset CDNs |

253253| `*.claudemcpcontent.com` | MCP App widget iframe |

254254| `assets.claude.ai` | Fonts loaded by MCP App widget iframes |

255| `redirector.gvt1.com` | Spellcheck dictionary download (Linux) |

256| `*.gvt1.com` | Redirect targets of the spellcheck dictionary download (Linux) |

255257

256258`*.claudemcpcontent.com` serves [MCP Apps](/docs/connectors/building/mcp-apps/getting-started), the interactive widgets connectors can render. Each widget loads in a sandboxed iframe on its own generated subdomain, so allowlist the wildcard.

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