fix(qwen3.5): drop redundant AppleClang capture

docs/BENCHMARKS.md

@@ -435,6 +435,11 @@ built on it rather than keeping the flattering one.
 
 **CPU elementwise GEMM, transpose-free `[K,N]` path (2026-08-07).** On dgx aarch64 the `[K,N]` path beats `[N,K]` by 1.16x to 1.30x, byte-identically. The x86 arm is INDICATIVE ONLY, not binding: that box is VOID for timing per `CLAIM-KERNEL-CPU-ELEM-GEMM-1`. `VT_CPU_MATMUL_STEAL` ships default OFF and is NOT measured; it must justify itself by measurement and may measure neutral.
 
+**Darwin Qwen3.5 build repair (2026-08-16).** Benchmarking is NOT APPLICABLE.
+The change removes a redundant namespace-scope lambda capture that Apple Clang
+rejects under `-Werror`; it does not change generated refusal text, model math,
+or any runtime path. The binding gate is the Apple Clang build.
+
 ## Open gaps
 
 | Track | Status | Next gate |

docs/FEATURES.md

@@ -148,6 +148,10 @@ speed-pending, which [BENCHMARKS.md](BENCHMARKS.md) tracks.
 | `CohereForCausalLM` | Command-R / Cohere (and Cohere2) | scaffold: W0 tiny-random oracle run-verified; real-checkpoint gate blocked | no run |
 <!-- supported-arch-table:end -->
 
+The Qwen3.5 MoE loader also builds under Apple Clang with project warnings
+promoted to errors. Its layout-refusal path uses the same messages and behavior
+on every platform.
+
 ### Standalone and non-registered lanes
 
 These run through dedicated forwards, not the `REGISTER_VLLM_MODEL` registry, so

docs/STATUS.md

@@ -2529,6 +2529,12 @@ The next run also guarded Voxtral's GCC-only `-Wstringop-overflow` suppression
 out of Clang, where it was fatal. Its Go `go-m1cpu` diagnostics were nonfatal
 and outside this repo.
 
+**Darwin Qwen3.5 build repair (2026-08-16).** The MoE layout refusal lambda no
+longer captures its namespace-scope help string. Apple Clang diagnosed that
+redundant capture as `-Wunused-lambda-capture`, and the project promotes the
+warning to an error. The lambda can still read the namespace-scope name
+directly. Runtime behavior and the Qwen3.5 lifecycle state are unchanged.
+
 **Agent onboarding:** [session](../.agents/specs/session-onboarding.md) +
 [entry](../.agents/specs/developer-agent-protocol-entrypoint.md) implemented;
 documentation-only.

src/vllm/model_executor/models/qwen3_5_weights.cpp

@@ -950,7 +950,7 @@ void CheckMoeQuantLayoutSupported(const std::vector<std::string>& names,
   // ...and the three NON-routed components, refused by the dtype the probe
   // RESOLVED rather than discovered as a complaint from inside a reader (#490).
   // Each of these already failed before #864; naming it is the whole change.
-  const auto refuse = [&kRequired](const char* what, MoeProjDtype got,
+  const auto refuse = [](const char* what, MoeProjDtype got,
                                    const char* supported) {
     VT_CHECK(false, std::string("qwen3_5 weights: a ") +
                         MoeProjDtypeName(got) + " " + what +