Erfan Hardanian
All work

Yadiyah-dee

My notes on how founders and investors thought. Everything I build can ask them.

From yād, Persian for memory.

ObsidianPythonvoyage-4ChromaDBMCP serverClaude Code

Field
Research and artificial intelligence
After Edwin Land’s library at Polaroid, which had two full-time librarians and one card file for the whole company. A real question, the cards it found, and what they say together.

Why I built it

My own almanac, inspired by David Senra’s Founders podcast. I’d listened to hundreds of episodes and read the books behind them, and none of it was anywhere I could search.

The idea behind it

Learning is not memorising information. Learning is changing your behaviour.

David Senra, Founders podcast

How it works

ModelCodePerson

  1. Choose

    I pick what goes in: business books and Founders episodes.

    Person157books433episodes

  2. Write

    A model writes each up as a note on the person: how they thought, what they got wrong, and whether they’re mostly a warning.

    Model513notes

  3. Check

    Every quote is checked word for word against the book or transcript it came from.

    Code

  4. File

    Each passage is filed by meaning, not by word, so a question finds the idea even when the words differ.

    Code13,649passages

  5. Ask

    Eli asks it before it judges a company. My assistants and I ask it while we work.

    Model

  6. Test

    Questions with known answers must still find them after every change, or the change comes out.

    Code

None of it is published. The notes are for me, and the books aren’t mine to share.

Built with

Runs on
Notes in Obsidian, and a search service in Python that any assistant on my computer can call.
Size
About 10,100 lines of Python.
Tooling
Claude Code.

The rule it follows

Study the failures as closely as the successes.