What problem does it solve? It ensures a finished book manuscript is mirrored from local Markdown into a Feishu cloud document without content drift, by automating chapter merging, document creation, and read-back consistency checks instead of manual copy-paste delivery. ## Core Features & Use Cases - One-command delivery: make deliver merges chapters into deliverables/final.md, creates a Feishu document via lark-cli docs, and reads it back for verification. - Read-back consistency checks: check_lark.mjs verifies headings, placeholder cleanliness, and 4-gram coverage against the local final draft, writing results to reports/lark_check.json. - Three-state status reporting: make status reports PASS, BLOCKED, or DRAFT_ONLY so delivery completion is never falsely claimed. - Use Case: After finishing a long Chinese book manuscript split across chapter files, run delivery to produce a single Feishu document whose content is verified to match the local Markdown source, or use SKIP_LARK=1 when the user only wants the Markdown file. ## Quick Start Deliver my finished manuscript in the book working directory to a Feishu document and confirm the read-back check passes.