chore: run full conformance CI suite

.github/workflows/conformance.yml

@@ -81,7 +81,6 @@ jobs:
           echo "draft conformance server did not become ready" >&2
           exit 1
 
-      # Run discovery separately until #985 enables the full draft suite.
       - name: Run SEP-2575 discovery contract
         run: |
           endpoint=http://127.0.0.1:8002/mcp
@@ -152,35 +151,14 @@ jobs:
             (.error.data.supported | index("2026-07-28") != null)
           ' /tmp/unsupported-version.json
 
-      # Keep this explicit list until the full draft suite is enabled by #985.
-      - name: Run supported draft server scenarios
+      - name: Run 2026-07-28 server suite
         run: |
-          for scenario in \
-            sep-2164-resource-not-found \
-            caching \
-            http-header-validation \
-            http-custom-header-server-validation \
-            input-required-result-basic-elicitation \
-            input-required-result-basic-sampling \
-            input-required-result-basic-list-roots \
-            input-required-result-request-state \
-            input-required-result-multiple-input-requests \
-            input-required-result-multi-round \
-            input-required-result-missing-input-response \
-            input-required-result-non-tool-request \
-            input-required-result-result-type \
-            input-required-result-unsupported-methods \
-            input-required-result-tampered-state \
-            input-required-result-capability-check \
-            input-required-result-ignore-extra-params \
-            input-required-result-validate-input \
-          ; do
-            npx -y "@modelcontextprotocol/conformance@${DRAFT_CONFORMANCE_VERSION}" server \
-              --url http://127.0.0.1:8002/mcp \
-              --scenario "$scenario" \
-              --spec-version draft \
-              -o conformance-results
-          done
+          npx -y "@modelcontextprotocol/conformance@${DRAFT_CONFORMANCE_VERSION}" server \
+            --url http://127.0.0.1:8002/mcp \
+            --suite all \
+            --spec-version 2026-07-28 \
+            --expected-failures conformance/expected-failures-2026-07-28.yaml \
+            -o conformance-results
 
       - name: Stop conformance servers
         if: always()
@@ -218,21 +196,14 @@ jobs:
             --spec-version 2025-11-25 \
             -o conformance-client-results/full
 
-      # SEP-2322 MRTR client scenario (spec 2026-07-28).
-      - name: Run draft SEP-2322 client scenario
+      - name: Run 2026-07-28 client suite
         run: |
           npx -y "@modelcontextprotocol/conformance@${DRAFT_CONFORMANCE_VERSION}" client \
             --command "$(pwd)/target/debug/conformance-client" \
-            --scenario sep-2322-client-request-state \
-            -o conformance-client-results/mrtr
-
-      - name: Run draft SEP-2575 client scenario
-        run: |
-          npx -y "@modelcontextprotocol/conformance@${DRAFT_CONFORMANCE_VERSION}" client \
-            --command "$(pwd)/target/debug/conformance-client" \
-            --scenario request-metadata \
-            --spec-version draft \
-            -o conformance-client-results/sep-2575
+            --suite all \
+            --spec-version 2026-07-28 \
+            --expected-failures conformance/expected-failures-2026-07-28.yaml \
+            -o conformance-client-results/draft
 
       - name: Upload results
         if: always()

conformance/expected-failures-2026-07-28.yaml

@@ -0,0 +1,43 @@
+# Known failures for the pinned 2026-07-28 draft conformance suite
+# (@modelcontextprotocol/conformance DRAFT_CONFORMANCE_VERSION).
+#
+# The full suites run in CI with `--expected-failures` pointing at this file:
+# - a scenario failing that is NOT listed here fails the build
+# - a scenario listed here that starts passing also fails the build (stale entry),
+#   so remove it from this list when the underlying issue is fixed.
+#
+# When bumping DRAFT_CONFORMANCE_VERSION, diff
+# `conformance list --spec-version 2026-07-28` and update #977.
+
+server:
+  # SEP-2575 stateless lifecycle gaps: discover capability declaration,
+  # missing-capability rejection, HTTP 404 for removed methods, and
+  # diagnostic tools (test_missing_capability, test_streaming_elicitation,
+  # test_logging_tool) not yet implemented.
+  - server-stateless
+  # SEP-2106: composition/conditional/$anchor keywords are stripped from
+  # published tool input schemas.
+  - json-schema-2020-12
+
+client:
+  # Client does not yet send MCP-Protocol-Version header pre-initialize as
+  # required by the 2026-07-28 stateless lifecycle.
+  - tools_call
+  # Auth feature gaps in the 2026-07-28 auth scenarios.
+  - auth/scope-step-up
+  - auth/offline-access-scope
+  - auth/offline-access-not-supported
+  - auth/authorization-server-migration
+  - auth/iss-supported
+  - auth/iss-not-advertised
+  - auth/iss-supported-missing
+  - auth/iss-wrong-issuer
+  - auth/iss-unexpected
+  - auth/iss-normalized
+  - auth/metadata-issuer-mismatch
+  # SEP-2243 client-side header handling gaps.
+  - http-standard-headers
+  - http-custom-headers
+  - http-invalid-tool-headers
+  # SEP-2106 client-side: $ref must not be dereferenced.
+  - json-schema-ref-no-deref

conformance/src/bin/server.rs

@@ -1228,9 +1228,7 @@ async fn main() -> anyhow::Result<()> {
 
     let server = ConformanceServer::new();
     let stateless = std::env::var_os("STATELESS").is_some();
-    let config = StreamableHttpServerConfig::default()
-        .with_stateful_mode(!stateless)
-        .with_json_response(stateless);
+    let config = StreamableHttpServerConfig::default().with_stateful_mode(!stateless);
     let service = StreamableHttpService::new(
         move || Ok(server.clone()),
         LocalSessionManager::default().into(),