This manifest critics modern (bloated, unreliable and worsening over time) softwares.
It favorises self-reliant programming (few features and simplicity, minimum amount of dependencies, write your own tools). It has benefits such as learning, improving skills, simpler code, simpler tools, easy modification and deployment.

Use vanilla HTML/CSS
Don't minimize that HTML
Prefer one page over several
End all forms of hotlinking
Stick with native fonts
Obsessively compress your images
Eliminate the broken URL risk

1. Simplicity is essential
2. Solve problems instead of creating them
3. We are not smarter than others, others are usually not smarter
4. Do everything yourself
5. Strive for robustness
6. Do not think you can make computing "secure"
7. Use input devices when they make the most sense
8. Avoid all ornaments
9. Tools are just tools
10. Be humble
11. Don't work for free if you do not enjoy it
12. Do not listen to others

Software is a way to get something done.

The followers of the Code It Yourself Manifesto believe in these things:

• We implement it according to our own goals.
• We make mistakes and learn from them.
• We learn how our tools we depend on need to work.
• We gain a deep understanding of our problem domain.

Another manifesto. Thanks for it. I add it to the collection.