I think manifestos are useless without a concrete, real-world example for people to follow and add on to. It's easy to wish for puppies and rainbows, but trying to deliver is hard.
For example, Linear has a useful manifesto (https://linear.app/method) because they have a product that attempts to follows it. I have much more respect for a manifesto that is informed by contact with reality.
I agree, but I always assume manifestos are distillations from experience.
Is it that you want to be able to inspect the experience that informs it side-by-side, in case-studies or product or something?
I take it for granted that you're not sceptical of the authors experience, because lord knows there's some experience behind the contributors and signatories :)
Maggie Appleton Samuel Arbesman Daniel Barcay Rob Hardy Aishwarya Khanduja Alex Komoroske Geoffrey Litt Michael Masnick Brendan McCord Bernhard Seefeld Ivan Vendrov Amelia Wattenberger Zoe Weinberg Simon Willison