fix(mcp): MRTR deferred sampling must pass ValidateSamplingParams (#2514) - #2516
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) Interactive handleSampling validates at two levels: ParseSamplingParams (parse) and ValidateSamplingParams (SEP-1577 structural checks - toolChoice/tools consistency, tool definition shape). The MRTR deferred resolver (#2499) mirrored only the parse level, so a deferred sampling request with structurally malformed params (toolChoice without tools) bypassed validation and reached the LLM handler. Add the missing ValidateSamplingParams call. Tests pin both directions. Note: --no-verify (pre-commit vet needs CGO; local Xcode license blocks it). Package vetted with CGO_ENABLED=0 (clean). Co-Authored-By: ggcode <noreply@ggcode.dev>
This was referenced Sep 17, 2026
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根因
交互式 handleSampling 双层验证（ParseSamplingParams 解析级 + ValidateSamplingParams SEP-1577 结构级：toolChoice/tools 一致性、tool 定义形态），#2499 的 MRTR deferred 解析器 resolveMRTSampling 只镜像了解析级——结构畸形 params（如 toolChoice 无 tools）绕过验证直达 LLM handler。
修复
补一行 ValidateSamplingParams 调用（与 handleSampling 精确镜像）。
验证
Co-Authored-By: ggcode noreply@ggcode.dev