workflow-fix: verify_task_body WARN on HF file-count claims vs scoped listing

Overview / Motivation

Auto-filed by the workflow-fix-on-bug protocol from a formal candidate block raised on task #931 (emitting agent: clean-result-critic).

Goal

Add a WARN-level verify_task_body check comparing numeric file-count claims near HF /tree links against a scoped list_repo_tree RepoFile count.

Workflow gap

• Bug observed: #931's body claimed "528 files" / "10 shards" / "3 files" / "198 files" for HF artifacts where the scoped listing at the pinned revision holds 515/9/2/197 — list_repo_tree folder entries were counted as files, and no mechanical check compares count claims against the Hub.
• Why it is a workflow gap: The verifier already resolves HF URL pins (check "HF URL pins resolve at the cited revision") but never validates adjacent numeric file-count claims, so a systematic entry-vs-file miscount ships unless an LM critic re-lists the repo.
• Confidence (emitter): medium

Proposed change (candidate diff sketch — refine in planning)

• def check_hf_file_count_claims(body, ...):

• for (count, prefix, sha) in _extract_count_claims_near_hf_tree_links(body):
  

•     n_files = sum(1 for e in list_repo_tree(repo, path_in_repo=prefix,
  

•                   repo_type="dataset", revision=sha, recursive=True)
  

•                   if isinstance(e, RepoFile))
  

•     if count != n_files:
  

•         warn(f"body claims {count} files at {prefix}, Hub has {n_files} "
  

•              f"(RepoFolder entries are not files)")
  

Scope / surfaces

• Primary target: scripts/verify_task_body.py
• Grep the workflow surface for the pattern before editing (grep -rln 'list_repo_tree' scripts/verify_task_body.py .claude/) and update every hit; list them in the plan. Network-dependent check must be fail-soft/skippable offline (WARN-level, never a blocking FAIL on a network error).

Constraints / invariants

• Workflow-surface only. tests/test_verify_task_body.py extended + green; ruff clean.
• This session runs under EPM_WORKFLOW_FIX_SESSION=1 and carries a workflow_fix_target: Provenance line — recursion guard applies.

Provenance

• workflow_fix_target: scripts/verify_task_body.py
• fingerprint: 16d3f1799c7b

Verbatim candidate block from clean-result-critic on #931: see epm:clean-result-critique v1 marker (workflow-fix-candidate v1 targeting scripts/verify_task_body.py, WARN-level HF file-count claim check, RepoFolder-entries-are-not-files).