every plugin permission is grantable, and there is no field to say otherwise

offscale was missing from the permissions page because it declared ownerOnly,
which mapped to kind admin, and admin capabilities are never offered for
granting. correct by the old rule and wrong by the standard: every plugin
follows the same platform-level permission model, appearing on the same page
with the same read/write/none per role.

so the field is gone rather than flipped. a plugin has no way to say owner-only,
which makes the standard structural instead of remembered — the same move as the
workspace rule. core, execution, confined and admin stay the platform's to
assign and a plugin cannot name any of them, so the escalation question is
removed rather than answered.

this is the second draft of this decision to be deleted: first a full
CapabilityKind with three of five values forbidden, then an ownerOnly boolean,
now nothing. the doc records all three so the reasoning is visible rather than
just the conclusion.

finer visibility stays the plugin's job. offscale is the worked example of the
gap that leaves and its manifest says so: it is grantable now, and its queries
still scope by the caller, so a granted member would see their own empty server
list rather than the owner's. closing that is a change inside the plugin.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

plugins/example/manifest.ts

@@ -30,7 +30,6 @@ export const manifest: PluginManifest = {
       key: 'example',
       label: 'Example',
       description: 'The reference plugin',
-      ownerOnly: false,
     },
   ],
 };