The merge pipeline (squash merge + quality gates) takes well over 60
seconds. Claude Code's MCP HTTP transport times out at 60s, causing
"completed with no output" — the mergemaster retries fruitlessly.
merge_agent_work now starts the pipeline as a background task and
returns immediately. A new get_merge_status tool lets the mergemaster
poll until the job reaches a terminal state. Also adds a double-start
guard so concurrent calls for the same story are rejected.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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