Confluence API Doc Sync

Sync API documentation from a multi-file docs/api/ directory to Confluence — one endpoint file = one Confluence page. The directory structure maps directly to a Confluence page tree, so no heading-based splitting is needed.

Uses acli for authentication verification and page reading (to get current version), and Confluence REST API via curl for page updates.

Core Principle: Directory Structure = Confluence Page Tree

The docs/api/ directory (generated by api-doc-gen) already organizes endpoints as individual files grouped by domain. This skill maps that structure directly to Confluence: