workflow-fix: verify_task_body HF count matcher — blobs-only per-namespace claims

Overview / Motivation

Auto-filed by the workflow-fix-on-bug protocol from a mechanizable finding raised on task #833 (emitting agent: clean-result-critic, epm:clean-result-critique v3).

Goal

Extend verify_task_body.py's HF file-count reconciliation to match the "N files listed per namespace" claim form and count blobs only.

Workflow gap

• Bug observed: #833's Repro footer claimed "908 files listed per namespace" — that number counted HF list_repo_tree(recursive=True) ENTRIES (891 blobs + 17 directory objects). The verifier's existing HF file-count adjacency matcher reported "no file-count claims" against the body, so the miscount shipped and was caught only by the LM critic's Hub spot-check.
• Why it is a workflow gap: the mechanical verifier owns file-count reconciliation; a claim form it cannot parse silently escapes the check.
• Confidence (emitter): medium

Proposed change (candidate diff sketch — refine in planning)

• In verify_task_body.py's HF count reconciliation, add the claim pattern r"(\d[\d,]*) files (?:listed )?per namespace" (and the sibling "N files at the pinned revision" form).
• When resolving the pinned namespace, count only entries with a non-None size (blobs), excluding directory objects returned by list_repo_tree(recursive=True).
• FAIL/WARN parity with the existing count-mismatch handling.

Scope / surfaces

• Primary target: scripts/verify_task_body.py
• Grep for the existing count-claim matcher + its tests before editing; update tests/test_verify_task_body.py.

Constraints / invariants

• Workflow-surface only; scripts/workflow_lint.py passes; ruff clean on touched files.
• This fix must not newly hard-FAIL grandfathered v3/v2 bodies (forward-only; WARN preferred where ambiguous).

Provenance

• workflow_fix_target: scripts/verify_task_body.py
• fingerprint: e04955ea9e78

Origin: clean-result-critic epm:clean-result-critique v3 on #833, Lens 5 procedural fix 1 ("mechanizable: yes — extend verify_task_body.py's HF file-count reconciliation to match the 'N files listed per namespace' claim form and count blobs only (its adjacency matcher reported 'no file-count claims' against this body)").