grammatical number - Attached is my thoughts. Plural or singular?

In an email I wrote :

Attached is my thoughts.

And then thought about it.

My attachment is a singular attachment. My thoughts are in the plural, within the single attachment.

But the very fact that I thought about it makes me wonder if this is one of those occasions when, whatever the formal and technical condition may be, the psychology of the statement overrides.

Any thoughts ?

Answer

Grammatically speaking, as far as I know:

"Attached are my thoughts."

Same as "My thoughts are attached."
(That's simple present tense in passive).

Or better

"Find attached my thoughts."

But

"Attached is my document"

same as:

"My document/ file is attached"

or better:

"find attached my document.