auto-maintenance: merge Two-Weeks-Team/PreviewForgeForClaudeCode PR #121 #226

Job	Run time
Template build smoke (B1+B2 regression guard)	20s
Test hooks (unit)	13s
Agent inventory (144 target)	5s
Shell script lint	14s
Verify plugin structure (ubuntu-latest)	17s
Verify plugin structure (macos-14)	17s
	1m 26s

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