Claude Desktop update strips ListAgents/SendMessage tools from scheduled-task and Remote Control sessions

0u0v · ghdev · 2026-09-05

A user reports that after Claude Desktop auto-updated from 1.44121.4 to 1.46388.1, the built-in cross-session messaging tools ListAgents and SendMessage disappear from Code sessions launched as scheduled tasks or driven via Remote Control — missing from both the tool registry and the deferred-tool list, with ToolSearch returning no matches, ruling out permission rules.

Key evidence (same machine, same account, within hours):

The author bisected via Squirrel update logs, pinning the regression to the 1.44121.4 → 1.46388.1 auto-update: a scheduled task successfully ran ListAgents and SendMessage hours before the update. Filed as bug, has repro, regression.

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