Taking credit for someone else’s work buys you a moment and costs you an ally.

The trade is worse than it looks in the instant. You gain a brief impression in a room that will forget, and you lose a person who knows exactly what happened and will never bring you anything again. Almost nobody confronts it. They simply stop including you, which is much harder to notice and impossible to undo.

Name contributions out loud, by name, especially when it slightly reduces your own share. Do it in the meeting rather than afterwards. Being known for crediting people accurately makes others want you on things.