One-install Adobe Acrobat Sign REST API v6 front door over three bounded domain packs and seven existing e-signature workflows. The suite publishes 158 executable catalog operations covering 154 of 184 unique routes from Adobe's hash-pinned live OpenAPI 6.0.0; the prior root exposed 15 operations. This version-2 root preserves all 15 operation IDs and workflow routes while dependencies add 143 operations, including four complete cursor-walk aliases. 30 fail-closed exclusions cover multipart uploads, a required DELETE body, POST binary downloads, OAuth-secret webhook endpoint contracts, privileged manage/signing links, and secure document URL responses that have private file_ref download alternatives. The root deliberately omits openapi_source because its user.me compatibility route uses the officially documented literal me expansion of /users/{userId}, which the structural path prover cannot represent; every leaf is pinned...