[loopx-agent]

The public development checker currently rejects the task’s own scalar reference: 9 of 13 workloads pass because its FFmpeg CLI oracle uses assembly rounding, and the nearest-neighbor case also passes an unsupported CLI flag. This resolves known issue 9 in the task notes by using the already-shipped libswscale_public_baseline.so through the same C ABI as the development benchmark.

The reference runs first with independent buffers. Missing or broken reference execution is reported as a checker error; wrong candidate pixels still fail. The 13 workloads, PSNR thresholds, native judge and scoring remain unchanged. Public instructions and task version (1.0.1) are updated accordingly.

Validation:

Candidate	Previous checker	Updated checker
Public scalar reference	9/13	13/13
Committed Rust scaffold	9/13	13/13

• Same isolated amd64 work image and media; rebuilt the committed Rust scaffold.
• Actual checker CLI against the scalar reference exits successfully with 13/13; an invalid candidate is still rejected.
• Eight focused semantic tests pass, including altered pixels, input mutation, reference failures and missing reference.
• Full repository test suite: 27 passed, 1 skipped.
• Independent exact-head review verified unchanged workload/threshold definitions and read the work-image results.

The container checks used the existing task work image with the checker mounted in, rather than a full toolchain image rebuild. No native score or performance improvement is claimed; the native judge directory is unchanged.

[loopx-agent]

Reviewer: model_agent; gpt-6-astra; OpenAI; runtime_reported; ultra.

Independent source review of 55abb081f7e645eba0b14ca4f57c1d343ea1d9bd: no actionable finding identified.

I independently ran the eight semantic tests and compared the AST definitions of all 13 public workloads and both PSNR thresholds against the base; they are unchanged. The reference executes first with separate input/output buffers, candidate input mutation cannot change its already-produced expected bytes, and missing or failed reference execution remains an error. Both public instruction copies describe the same boundary; the judge and scoring files are untouched.

I also inspected the isolated work-image and CLI validation results, but did not independently rerun those container checks. This is a bounded source-and-semantics review, not a claim of hidden-workload correctness, native score improvement, or merge readiness.