* [Server] Serve both protocol eras from one endpoint
The two lifecycles share a transport, not a dispatcher. StreamableHttpTransport
classifies each request - a 2026-07-28 envelope, an initialize handshake, or a
session-bound follow-up - through InboundClassifier and routes it to the
dispatcher that owns it, so one URL answers a modern client and a handshake-era
one alike. Builder::build() carries both; withoutModernEra() opts out and
setModernVersions() narrows what the modern leg answers for.
InputRequiredShim lets a handler written for multi round-trip requests also
serve a handshake-era client, by turning each ask into the request/response
exchange that era has - so a handler is written once rather than twice.
The conformance fixture collapses into one server for the same reason: both
legs now hit the same URL.
* Trim redundant comments, fix stale in-memory claim in conformance fixture
* Drop stale json-schema-2020-12 baseline entries
The new fixture tool makes this scenario pass in both eras now.
* Reject handshake revisions in setModernVersions(), warn on unsafe custom middleware
Copilot review: setModernVersions() accepted revisions InboundClassifier
would never route to the modern leg. StreamableHttpTransport now warns
when a custom middleware list carries ProtocolVersionMiddleware, since
it runs before era classification and rejects modern-era traffic by
default. Also fixed a misleading docblock claim on the same middleware.
* feat(client): add complete MCP client SDK with STDIO and HTTP transports
Add Client, Builder, ClientProtocol, ClientSession, and transport
implementations for communicating with MCP servers. Supports tools, resources, prompts, and real-time progress/logging notifications.
* refactor(examples): reorganize examples into server/ and client/ folders
* feat: add SamplingRequestHandler for handling server sampling requests
* feat: add setLoggingLevel method to control server logging verbosity
* refactor: make progress token dependent on request ID
* docs: Update server IP in usage instructions and add notes on sampling server requirements.
* feat: add complete() method for completion/complete requests
* refactor: properly parse and type initialize result
* refactor: standardize method names
* fix: revert changes to server related components
* fix: revert changes to server related components
* refactor: Restructure client transports and handlers into dedicated namespaces.
* fix: cs and php-stan errors fixes(partial)
* feat: Refactor request handlers to return `Response` or `Error` objects directly, adding a `SamplingException` and error logging for sampling requests.
* feat: Replace `ClientTransportInterface` with `TransportInterface` and move response result deserialization to client methods.
* refactor: remove redundant timeout check for intialize on transports
The processFiber that executes per tick while fiber is suspended already handles timeouts while waiting
* feat: broaden symfony/http-client dependency to support Symfony 5.4 to 8.0
* Update examples/client/README.md
Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
* Update examples/client/README.md
Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
* refactor: remove outgoing message queue from session and simplify transport send method to directly dispatch messages.
* refactor: Replace ClientSession with ClientState for clearer intent on runtime state management
* refactor: rename connectAndInitialize to connect for consistency
* chore: cs fix
* chore: use SamplingCallbackInterface instead of a closure for sampling request handler
---------
Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
