Why: the approved collaboration plan U1 requires a fixed deployment manifest, tier config contract, migration mapping, capacity contract, isolation test scheme and KTD14 copy-protection contract as the single source of truth for team-tier operations.
Evidence: contract keys match backend config.go tier/pool fields (U2, backend branch feature/collab-storage-pg-tier); local verification used svc.sh collabtest on 127.0.0.1:8897 and Redis on 6399.
Impact: docs only (new guide + usage.md cross-links); no code change.
Refs: proposals/2026-10-11-collaboration-storage-and-distribution.md sections 5 (U1/U2), KTD1/KTD8/KTD12/KTD14.
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Docs only: U1 fixed deployment manifest, team-tier config contract, migration mapping, capacity contract, isolation test scheme, KTD14 copy-protection contract, transient-file classification, honest boundary list. Plan ref: proposals/2026-10-11-collaboration-storage-and-distribution.md U1.