Limit agent mode list to primary #33

Job	Run time
test-js	2m 16s
lint	56s
typecheck	57s
Rust tests (macOS)	5m 13s
Rust tests (Windows)	13m 10s
Rust tests (Linux)	11m 26s
Tauri build (${{ matrix.platform.name }})	-1s
	33m 57s

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