generated: '2026-09-05' method: searched source: https://21gram.co.kr/llms.txt http_status: 200 content_type: text/plain;charset=utf-8 bytes: 74 file: 21gram-llms.txt note: >- 21gram serves a document at the canonical /llms.txt path and it is saved verbatim, but it is NOT in llms.txt format. It is a four-line robots.txt-style AI-usage policy (User-agent / Allow / Commercial-use: allowed / Research-use: allowed) — it grants AI crawlers permission but carries no H1, no summary blockquote and no link sections, so it points an agent at nothing. Recorded as searched because the provider genuinely publishes it; graded here as a permission grant rather than a docs index so a reader is not misled into expecting a link surface behind it. format: robots-style-ai-policy deviations: - no-h1-title - no-summary-blockquote - no-link-sections grants: commercial_use: allowed research_use: allowed allow: /