-- writing documents for each other takes weeks - write the document, give people time to review the document, discuss, update on review.
-- writing documents for Claude takes minutes rather than hour - AI is used to assist in writing specs, personal instead of collective review/approval process.
Also beneficiaries are different:
-- when you write spec for Claude - you benefit personally, you have higher chance of getting code you need from ai coder
-- when you write spec for the company - the company is the main beneficiary, it get higher chances to get teams on the same page with the change