What's wrong with this entry?
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The SlashCommand tool has been removed. Slash commands are now invoked directly by the user or through the Skill tool. This simplifies the tool surface and removes redundant functionality.
Evidence
Removed $S = "SlashCommand" at line 424048, removed ir = { name: $S, ...} tool definition
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.