verify.py v0.4: cat reports/*.json after test_cmds (upstream harness reads the report dir itself; print_cmds is often empty)

verify.py v0.3: pre-fix missing tests count as failing (upstream semantics), record all cmd lists

verify.py v0.2: per-language PATH fix, /testbed rewrite, record test cmds

verify.py v0.1: run rebuild_cmds, mkdir reports, single-pass output parsing

verify.py: per-row verification + context expansion harness (v0)