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name: 3p description: Reference for the 3p / enterprise / inference-gateway deployment of Claude Desktop on Linux - how /etc/claude-desktop/managed-settings.json is read, what "3p mode" changes (separate ~/.config/Claude-3p userData, hidden Chat tab, the false VM-download banner), how Cowork still runs under it, which hardcoded paths are safe vs split under the -3p switch, and how to verify it all from logs. Use when working on managed-settings.json, inferenceProvider/gateway/Bedrock/Vertex configs, the 3p setup SPA (ion-dist), the Claude-3p directory, or debugging managed-deployment Cowork. when_to_use: When the user mentions managed-settings.json (or the old enterprise.json), managed/MDM config, 3p / third-party deployment, inferenceProvider (gateway/bedrock/vertex/foundry/mantle), an inference gateway / LiteLLM, the Claude-3p config dir, the "Download a one-time package" banner, deploymentMode, the 3P setup window, or edits fix_marketplace_linux / fix_ion_dist_linux. paths: patches/fix_marketplace_linux.nim, patches/fix_ion_dist_linux.nim, baseline/ION.md

3p / enterprise / inference-gateway deployment on Linux

"3p" = third-party / managed deployment: Claude Desktop pointed at a non-Anthropic inference backend (Bedrock, Vertex, Azure, or a self-hosted gateway like LiteLLM) and/or an MDM-managed config. On Linux it is driven by /etc/claude-desktop/managed-settings.json. Minified names below are version-specific (they churn every release - see /linux); anchor on stable strings. Verified against v1.14271.0.

managed-settings.json (/etc/claude-desktop/managed-settings.json)

The official Linux build reads /etc/claude-desktop/managed-settings.json natively - it ships a Linux managed-config reader, so we no longer patch the win32-registry/macOS-plist reader the way the old MSIX pipeline did. (Historical note: on the MSIX, fix_enterprise_config_linux.nim injected a Linux JSON reader for the old enterprise.json path; that patch and path are obsolete now that the official build does it.) Schema is documented in memory project_enterprise_json_schema - the load-bearing facts:

• Top-level managedMcpServers is an array (name+transport+url/command), NOT an object-keyed mcpServers map (that is silently dropped by the schema parser - no warning).
• Inference-gateway keys: inferenceProvider ("gateway"/"bedrock"/"vertex"/…), inferenceGatewayBaseUrl, inferenceGatewayApiKey, inferenceGatewayAuthScheme, inferenceModels (array; first is default), disableDeploymentModeChooser:true.
• Any of inferenceProvider / bootstrapUrl present + (disableDeploymentModeChooser OR persisted deploymentMode!=="1p") flips the app into 3p mode.

What "3p mode" changes (all upstream behavior, not our patches)

| Effect | Why | Our stance | |---|---|---| | userData -> ~/.config/Claude-3p/ | Upstream setPath("userData", base+"-3p") at bootstrap, guarded by !process.env.CLAUDE_USER_DATA_DIR. Logs [custom-3p] .... | Intended - isolates 1p login from 3p. Keep it. (To collapse: export CLAUDE_USER_DATA_DIR in the launcher - it short-circuits the suffix. Not done by default.) | | Chat tab hidden | chatTabEnabled:A=>A.chatTabEnabled===!0 (strict; default off in 3p). Cowork/Code stay (!==!1). | Intended. To restore: add "chatTabEnabled": true to managed-settings.json (config-only, no patch). | | 3P setup SPA at app://localhost/setup-desktop-3p | The ion-dist config UI. | fix_ion_dist_linux + fix_marketplace_linux. Config-key schema in baseline/ION.md. |

[custom-3p] in main.log is upstream's own log namespace - do not mistake it for a patch tag.

Cowork under 3p: works the same as 1p, on the official native backend

Cowork runs on the official native Cowork VM backend bundled in the Linux .deb (cowork-linux-helper

• QEMU/OVMF; requires /dev/kvm) - the same backend 1p uses. There is no separate daemon (the old claude-cowork-service is deprecated). The 3p OAuth bounce (issue #142 / session_stale_relogin) only fires for a genuinely broken token; a logged-in account with credits + valid Anthropic models does not bounce. (Provider model names matter: inferenceModels must be Anthropic models or the config-health gate reports config_model_rejected. A gpt-* entry, or no credits -> billing_error, makes a turn fail and looks like a bounce - it is not.)

The old "Download a one-time package" banner (getDownloadStatus() -> NotDownloaded because the local VM-image check never matched on the MSIX build) is no longer ours to patch: the official Linux build ships the native Cowork VM backend, so the historical fix_cowork_download_status_linux.nim patch is obsolete.

Does the Claude-3p split break anything? (hardcoded-path audit, verified)

No load-bearing path breaks. State isolates between Claude (1p) and Claude-3p (3p) by design; nothing crashes or cross-leaks. Rules:

• Markers/sockets (quick-entry, SSO-callback) live in $XDG_RUNTIME_DIR (+CLAUDE_PROFILE), not .config -> unaffected by the userData switch.
• All Electron userData (sessions, logs, claude_desktop_config.json, custom-themes JSON, screenshot restore-token) goes through app.getPath("userData"), which auto-relocates to Claude-3p. So it follows the split (e.g. a custom-theme set in 1p won't carry into 3p - cosmetic only).
• CLI config uses CLAUDE_CONFIG_DIR (launcher); autostart .desktop files live in the XDG ~/.config/autostart/ spec dir and are CLAUDE_PROFILE-aware - both correctly not tied to the -3p userData.
• The rule for new patches: write user state via app.getPath("userData") (auto-isolates), never a literal os.homedir()+"/.config/Claude". The Python screenshot fallback ~/.config/Claude/... in js/cu_linux_executor.js is dead code (the JS always passes the real getPath value via CLAUDE_PORTAL_TOKEN_PATH) - harmless, but don't copy that pattern.

Verify it loaded / works (logs at ~/.config/Claude-3p/logs/)

Note the dir: 3p logs to ~/.config/Claude-3p/, NOT ~/.config/Claude/. Reading the wrong dir gives stale/1p evidence.

L=~/.config/Claude-3p/logs/main.log
rg -a 'Enterprise config loaded|custom-3p\] (3P mode active|Credentials loaded|ConfigHealth)' "$L" | tail
# healthy gateway:  [custom-3p] ConfigHealth recomputed { state: 'healthy', provider: 'gateway' }
rg -a 'LocalAgentModeSessions.start|Turn succeeded|cycle_health|session_stale_relogin|config_model_rejected|billing_error' "$L" | tail
# Cowork spawn proof (official native VM backend):
rg -a 'Using Claude VM spawn|Spawn succeeded|vmStarted|Turn succeeded' ~/.config/Claude-3p/logs/cowork_vm_node.log | tail

Related

• baseline/ION.md - 3P setup SPA bundle, patched patterns, config-key schema (inferenceProvider, deploymentOrganizationUuid, …) and the ~/.config/Claude-3p/claude_desktop_config.json path.
• memory project_enterprise_json_schema - the exact managed-settings.json shape + how to confirm it loaded.
• memory issue142_cowork_3p_oauth_regression - the OAuth-bounce mechanism (only bites a broken token).