Independent correctness gate review

Reviewer: GPT-5.6 Sol high; author/operator: GPT-6 Astra; evaluated model: Qwen. Read-only review of native artifacts and pinned runtime source.

Recommendation: do not promote; halt expensive finalist, context, endurance, and MTP expansion for this exact profile.

Candidate required ZIP string tools fail0/3 with thinking off and0/3 with requested reasoning-low; incumbent passes3/3. Reasoning-low repairs coding0/3 to3/3 but cannot rescue this tool gate. Protocol preflight's alphabetic city value does not cover numeric-looking strings.

Raw malformed tool arguments are not retained (arguments=null), so attribution to checkpoint, parser or template is unconfirmed. Other boundary cases remain untested. A parser/template correction constitutes a new configuration requiring fresh qualification.

The image artifacts retain null engine_build_ref and omit the flag transition. The companion configuration, recipe hashes and owning log excerpts bind the observed reload. The12/12 pass is functional evidence, not independently proven immutable recreation.

The review rejects the tested served profile, not the checkpoint under every possible runtime. Workflow packet validation MCP was unavailable; no machine-validated workflow packet is claimed.