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{"type":"item.completed","item":{"id":"item_0","type":"agent_message","text":"<artifact name=\"FEATURE-CLI-ENTRYPOINT.md\">\n# FEATURE: CLI Entry Point\n\n| Field       | Value |\n|-------------|-------|\n| Version     | 20260812 V1 |\n| Description | Provides the executable standard-input and standard-output CommonMark interface. |\n| Depends On  | ARCHITECTURE.md |\n| Provides    | parser executable |\n| Consumes    | parser core, HTML renderer |\n\n## Questions\n\n- None.\n\n## Workflow\n\nThe executable reads UTF-8 Markdown from standard input. It parses block structure before inline structure, renders the resulting document as HTML, and writes only rendered HTML to standard output. A successful invocation exits with status `0`.\n\nThe executable is named `cmark` and is invokable from the build directory as `./cmark`. It supports the supplied harness's program invocation contract.\n\n## Programmatic Acceptance\n\nRequires: executable=cmark; scope=test\n\n=== AC cli-stdin-stdout ===\nIntent: The executable renders Markdown supplied through standard input and exits successfully.\n\nimport subprocess\n\nresult = subprocess.run(\n    [\"./cmark\"],\n    input=\"# Hello\\n\\nworld\\n\",\n    capture_output=True,\n    text=True,\n    encoding=\"utf-8\",\n)\nprint(result.stdout)\nprint(result.stderr, file=__import__(\"sys\").stderr)\nassert result.returncode == 0\nassert result.stdout == \"<h1>Hello</h1>\\n<p>world</p>\\n\"\n=== END AC cli-stdin-stdout ===\n\n=== AC cli-utf8 ===\nIntent: The executable accepts UTF-8 Markdown and emits UTF-8 HTML.\n\nimport subprocess\n\nresult = subprocess.run(\n    [\"./cmark\"],\n    input=\"cafe\\n\",\n    capture_output=True,\n    text=True,\n    encoding=\"utf-8\",\n)\nassert result.returncode == 0\nassert result.stdout == \"<p>cafe</p>\\n\"\n=== END AC cli-utf8 ===\n\n## User Acceptance\n\n- None.\n\n## Guardrails\n\n- Markdown input is read from standard input.\n- Rendered HTML is written to standard output.\n- The executable does not write diagnostics into standard output during successful parsing.\n</artifact>\n"}}
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