sync: port upstream pagination, reconnect settle, and Claude subagent safety (#5556–#5573)

[aaditagrawal]

L2/7 of the 2026-08-08 upstream sync stack. Stacked on L1 (#215).

What lands

• Worktree creation without origin remote (fix(server): skip origin fetch when creating worktrees in repos without an origin remote pingdotgg/t3code#5556)
• Claude work-log/VCS notice filtering + stop diagnostic cleanup (fix(server): stop showing commit/push/PR notices as errors in the work log pingdotgg/t3code#5559, fix(server): stopping a Claude thread no longer shows an ede_diagnostic error pingdotgg/t3code#5557)
• Immediate settle for stopped threads (fix(server): let stopped threads settle immediately pingdotgg/t3code#5553)
• Thread detail pagination with user-anchored turn windows (feat: paginate thread loading with user-anchored turn windows pingdotgg/t3code#5493)
• Reconnect-loop prevention during server stalls + editor discovery cache (fix: prevent reconnect loops during server stalls pingdotgg/t3code#5561, fix(server): one disconnecting client no longer blocks every reconnect pingdotgg/t3code#5572)
• Settle stopped Claude subagents (fix(server): settle stopped Claude subagents pingdotgg/t3code#5568)
• Scroll-up no longer snaps timeline to bottom while streaming (fix: scrolling up during a running thread no longer snaps back to the bottom pingdotgg/t3code#5566)
• Client transfer budget regression tests in CI (test(server): catch client transfer regressions in CI pingdotgg/t3code#5350)
• Slow RPC toast ignores long-running provider refresh/update (fix(web): stop the "requests are slow" warning from firing on every provider update pingdotgg/t3code#5570)
• Agent panel row stability (fix(web): keep agent panel rows stable pingdotgg/t3code#5569)
• Production T3 Connect public config in .env.example (docs: ship production T3 Connect public config in .env.example pingdotgg/t3code#5573)

Fork deviations preserved

• #5493 migration renumbered to runtime 42 / file 039_ProjectionTurnsKeysetIndex.ts (fork already uses 037/038)
• ChatView keeps rateLimitThreads / RateLimitsView and backgroundLiveness
• CI keeps fork GitHub-hosted runner layout; adds transfer-budget env + artifact upload
• Slow RPC tracking keeps fork subscribe regex while adding long-running method thresholds

Verification

vp check and vp run typecheck pass on the tip (plus format fix for index.css).

Stacked below L3. Review bottom-up after L1.

  

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