merge

File claim / protection for concurrent DeepSeek Harness (DSH) sessions working the same workspace: claim/release, heartbeat stale takeover, async pending merge area (git 3-way merge). DSH Host plugin.

Queue Consolidation for DeepSeek Harness: merge queued follow-up messages into one consolidated formal prompt for the next turn instead of piecemeal one-message-per-turn rework.