Capture project knowledge

This skill writes a markdown note into the user's Obsidian vault capturing reusable, cross-project technical knowledge. The user invokes you from inside one of their software projects; you distill what you've learned (from the code, conversation, or your own investigation) into a note that future-them can find and apply on a different project.

Resolving the vault path

The vault is named Main but lives at a different absolute path on different machines (e.g. /Users/arjen/Documents/Obsidian/Main on one Mac, /Users/arjenschwarz/Documents/Obsidian/Main/Main on another). Never hardcode the path. The skill keeps a per-machine cache of the path so it doesn't depend on Obsidian (or its CLI) being available at write time.

Cache location: ~/.config/capture-knowledge/config.json, with shape:

{
  "vault_path": "/Users/arjen/Documents/Obsidian/Main"
}

Resolution workflow

On every invocation, run this in order — stop at the first step that yields a path: