diff: the command.run hook names its command by a literal the engine's scan reads - #96570

The mod's command.run hook matched its own command through a named constant ({ command: Names.COMMAND_NAME }). The engine's scan of a hooks module reads literal command names in command.run matchers, and uses them to decide which slash commands typed right at startup must wait for a module that is still loading. A constant it cannot read counts as "may hook any command", so while the diff mod was loading every early listed command (/help, /exit, ...) waited for it.

The matcher now spells the literal, { command: 'diff' }, the way the mod's clear/resume hook already does. Behaviour is unchanged (the constant's value is 'diff'); claude plugin validate mods/diff now reports command.run{command=diff}.

Checked:

• claude plugin validate mods/diff passes and lists the hook as command.run{command=diff}.
• With an engine that holds early commands by name, an early /help typed while a mod with a 3 s start loads opens in 4.5 to 4.9 s with this line and 8.2 s without it.