modlens v3.16.6 Fixes a Validator That Rejected the Exact Shape Models Reach For — `null` in an Optional Field

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liustack/modlens (1,662 stars), a vision bridge that gives text-only coding models structured JSON evidence from images, released v3.16.6 on 2026-08-14 at 20:37 UTC fixing issue #37: an optional field holding `null` failed the contract read, even though `null` is what a model emits when it has nothing to say for that field, and the reporter's own workaround had to legalize it. Optional `null` is now dropped before validation rather than passed through. The same release refused `structuredOutput` configuration where nothing would read it — a small but good pattern of failing loudly on config that silently does nothing.