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Adds Setup → MCP servers as a dedicated page under Agents. Shared definitions and servers found only in native settings are shown together, with clear per-agent On, Off, Differs and Own entry states. These describe saved configuration; Setup never starts a command or connects to a server.

The page, inspector and Add/Edit/Share/Remove flows follow the supplied MCP handoff and use the existing Skills matrix, Kit layers, controls and design tokens. Phones get a grouped library, fixed Add action, native policy selects and collapsible review rails. The pinned Server header uses the same Installed agents / All agents radio menu as Skills, with equal-width agent columns and no trailing expansion control. Uninstalled agents’ saved entries are read-only. Polling preserves open menus, focus and drafts. Shared phone agent filters reserve room for complete focus rings and reveal focused chips at either scroll edge, including in Skills.

Native settings changes are reviewed, revision checked, serialized with Skills writes, backed up and published atomically. Differing copies require review/consent, editing preserves per-agent Off, and partial removal keeps the shared definition until every unlink succeeds. The bounded snippet parser accepts the supplied formats without executing input. List responses stay redacted; credential reveal is explicit. No new runtime dependencies.

The MCP guide documents native formats, sign-in, scope and recovery.

Validation

• 747 Node tests pass, including all 18 supplied parser cases, authenticated API checks, revision conflicts, adoption, format preservation and redaction.
• MCP browser audit passes in 8 configurations: desktop, phone, embedded desktop and embedded phone, in both themes. Covers stale/late replies, draft preservation, lossless arguments, duplicate submission, replacement consent, partial removal, unreadable stores and Off-preserving Undo. All eight cases also pass through the real Setup server’s unlock/session flow, with the embedding mode checked after sign-in. Column regressions cover keyboard focus, both scroll edges, zero/all installed agents and uninstalled agents with saved settings. Phone filter regressions Tab and Shift+Tab through every chip in normal and forced-color modes, checking the entire focus outline and touch targets.
• MCP geometry audit: 7 configurations, no findings. Skills browser regression passes in 12 configurations, including phone/tablet and embedded layouts. Same-viewport light/dark comparisons cover the supplied screens and focused chips at both ends of the row.
• Real native smoke passes for Claude 2.1.309, Codex 0.163.0 and OpenCode 2.1.3 with disposable homes and synthetic local/HTTP servers; includes credential delivery, unlink and fresh Off/On reads. Cursor and Grok binaries are unavailable locally; bundled-provider and architecture coverage runs in image CI. No production configuration was used.
• JavaScript/shell syntax, shellcheck, harness UI audit and mise generation checks pass. Docker image builds/smoke run in CI.

Library previews

Desktop · light	Desktop · dark

Phone · light	Phone · dark

Column visibility

All agents at the right scroll edge keeps the server names and selector in view.

Phone keyboard focus

Complete focus rings at both scroll edges. The filter row keeps its alignment
with the search and notices, and focused chips scroll fully into view.

First chip · light	Last chip · dark