Address a colleague who took credit for your work

A colleague has taken credit for work that was yours and you want to address it without looking petty. This rewrites your message three ways, assertive that names what happened and restates your contribution, diplomatic that raises it as a misunderstanding, and a middle version, so you reclaim the credit in the tone that fits.

A colleague presented or claimed credit for work I did and I need to address it professionally.

Who took the credit: {COLLEAGUE_ROLE}
What work was involved: {WORK_DESCRIPTION}
How it came to light: {HOW_IT_HAPPENED}
My draft message: {MESSAGE_DRAFT}

Rewrite this message in three versions:
1. Assertive: clearly names what happened and restates your contribution without softening
2. Diplomatic: raises the issue as a misunderstanding to resolve together, preserving goodwill
3. Neutral: states the facts of your involvement and asks for acknowledgement without accusation

Label each version clearly. Keep all three under 150 words each. End with one sentence on how the relationship context should influence tone choice.