Show HN: ID8 – A scratchpad that tells you what not to build

Most of us have a pile of half-baked ideas sitting in notes, whiteboards, or Notion docs. The problem isn’t coming up with them — it’s knowing which ones are worth chasing (and which ones will just eat your time).

I built ID8 as a scratchpad that doesn’t just store ideas — it helps you kill the bad ones early.

Here’s how it works:

• Bring your own idea (or let it generate some for you)

• Ideas go through a simple lifecycle: Suggested → Deep Dive → Iterating → Considering → Building/Launching

• Along the way you get AI-assisted validation (market signals, customer insights, defensibility checks)

• You keep a record of your thinking and the “why” behind each decision

• If something actually is worth building, you end up with pitch-ready docs and traction notes instead of scattered scraps

The goal: make research and validation as addictive as idea-generation, so you spend less time building stuff nobody wants.

Would love feedback from other hackers: • Would you use this to pressure-test your own ideas?

• Do you see it more as a solo tool, or something to use with a team?

• What would make this scratchpad the default place you put your next idea?

No GitHub signup (it’s broken) — just a simple email login and chrome