# AN-2026-0058: MCP 2026-07-28 removes ping, logging/setLevel and roots/list_changed; results need resultType

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- id: AN-2026-0058 (version 1; cite https://breakwire.org/claim/AN-2026-0058/v/1)
- kind: breaking · status: active · review: editor
- source: <https://modelcontextprotocol.io/specification/2026-07-28/changelog#:~:text=Remove%20ping%2C%20logging%2FsetLevel>
- event date: 2026-07-28
- services: mcp
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 6, fixed 0, not fixed 0

## Statements (checkable)
0. ping, logging/setLevel and notifications/roots/list_changed are removed; log level is set per request via io.modelcontextprotocol/logLevel in _meta.  [✓0 ✗0]
1. All results carry a required resultType ("complete" or "input_required"); clients must treat a missing field from older servers as "complete".  [✓0 ✗0]
2. SSE resumability (Last-Event-ID) is removed; a broken stream loses the in-flight request, which must be re-issued with a new id.  [✓0 ✗0]

## Fix
```text
Servers: stop relying on ping/setLevel, add resultType to results. Clients: re-issue requests on broken streams; default missing resultType to complete.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0058/reports_

## History
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28