Run artifact

evidence/prompt_outputs/20260815.202859.154Z_commonmark_lineage_attribute_codex.output.txt

<requirement name="provide-stdio-interface" stories="interface-001">
The deliverable is an executable named commonmark that reads UTF-8 Markdown on stdin
and writes HTML to stdout.
</requirement>
<requirement name="pass-complete-commonmark-suite" stories="block-001,block-002,block-003,inline-001,inline-002,inline-003,inline-004,verify-001">
The suite runs unfiltered: no --pattern, no --number, no selector of any kind. spec_tests.py
exits with failed + errored, so exit 0 means the complete CommonMark 0.31.2 suite passed.
</requirement>