#2153 dropped App.tsx below the React Compiler's bail-out, so the
compiler-powered rules in eslint-plugin-react-hooks v6 began reporting
nine latent findings. Each was suppressed with a directive pointing at
this issue; the later phases moved them into useConnectionLifecycle and
useMcpApps. Eight remained. Five are now fixed and three re-justified on
their own terms, so no suppression points at an open issue any more.
Fixed:
- `connectedServerId` was a useState mirrored from `connectionStatus` and
`activeServerId` by an effect. It is a pure function of both, so it is
derived. A state copy could only lag the status it copies by one
committed render, which is a frame of the wrong highlight for no gain.
- The two latest-ref writes (`sandboxUrlRef`, `listedResourcesRef`) move
from render into a layout effect, the same fix review applied to
`setupClientForServerRef` in #2153. Both refs are read by an event
handler or an async handler that runs after the commit, so neither
reader observes a different value.
- `appElicitationController` was a ref seeded during render with `??=`.
The instance is never reassigned, so `useState`'s lazy initializer
gives the same create-once semantics without a render-time ref read —
which also retires the two directives on the `useSyncExternalStore`
arguments it fed.
Kept, with the argument in place of the pointer:
- The deep-link `onToggleConnection` call. It opens a transport and
drives a handshake; the state it sets along the way is a consequence of
that I/O, not something derivable from props. An effect is the right
tool, and the one-shot `deepLinkConnectRef` guard is what bounds it.
- The two `createAppBridgeFactory` calls. `react-hooks/refs` cannot see
through the factory and warns that a ref-reading dep it is handed
(`getListedResourceMeta`) may be called during render. It is not: the
factory only stores its deps, and the sole call site is inside the
async `sandboxready` handler.
No behavior change beyond `connectedServerId` landing in the same
committed render as the status it derives from, rather than the next one.
Signed-off-by: Cliff Hall <cliff@futurescale.com>
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013hzwzS8UvBsr4yZm7o7sev
Signed-off-by: cliffhall <cliff@futurescale.com>
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