* [Client][Server] Add Roots support
Wire up the MCP "roots" capability on both sides:
Client (php-sdk as client):
- RootsCallbackInterface + ListRootsRequestHandler answer server roots/list
requests, mirroring the Sampling handler.
- Client::sendRootsListChanged() emits notifications/roots/list_changed.
Server (php-sdk as server):
- ClientGateway::listRoots() requests the client's roots, and
supportsRoots() reports whether the client advertised the capability,
normalizing the stored capabilities to an array so an empty
capabilities object (\stdClass) doesn't cause a TypeError.
- Add ListRootsResult::fromArray() (used by listRoots()).
- ListRootsRequestHandler forwards RootsException messages to the server
(new Mcp\Exception\RootsException), mirroring SamplingRequestHandler.
- Client::sendRootsListChanged() throws when the client did not advertise
the roots.listChanged capability.
Examples, docs and tests:
- examples/README/docs advertise
`new ClientCapabilities(roots: true, rootsListChanged: true)` before
sending notifications/roots/list_changed.
- CHANGELOG entry for Roots (unreleased 0.7.0 section at the time).
- Unit tests for capability serialization/round-trip, sendRootsListChanged
gating, and RootsException message forwarding.
phpunit, php-cs-fixer and phpstan green.
* [Client][Server] Address review: schema validation, changelog section, connection guard, working example
Responds to chr-hertel's review of the Roots support:
- ListRootsResult::fromArray() rejects non-array root elements instead of
accepting malformed entries silently.
- CHANGELOG entry moved to the next unreleased section as the release
train advanced past it (0.7.0 -> 0.8.0).
- Client::sendRootsListChanged() went straight to
Protocol::sendNotification(), which sends via
`$this->transport?->send()` -- on a client that is not connected the
notification was silently dropped. It now throws a ConnectionException
like sendRequest() does.
- The stdio example only advertised the roots capability, so the
roots/list handler never actually ran. The client-communication demo
server gets an `inspect_workspace_roots` tool that calls
ClientGateway::supportsRoots()/listRoots(); the example calls it, so
the server actually issues roots/list and the client answers it.
Dropped the try/catch wrapper from the example.
- ClientTest's connected-client mock now goes through setState() so
isConnected() reflects a real handshake instead of a stubbed flag.
phpunit, php-cs-fixer and phpstan green.
bdc9d86671