Breadcrumbs

Breadcrumbs grew a price-history service over 17 months of my own grocery orders. Two facts about the data shaped the whole design, a passing test suite hid a false alert that only a replay against real orders exposed, and raising the threshold provably could not fix the promo problem.

Porting a working file-sync pattern from one project to another would have replicated a 188 MB authenticated browser session and a secrets file across the whole machine mesh, because the sync tool does not read the ignore file that version control does. Three options, one structural fix, verified by hashes and an absence check.

breadcrumbs is a free, open-source browser extension I built to read my own logged-in grocery order pages and export a clean, itemized file, every item by name, with the price, so my budget knows what the basket actually held. Two store integrations work, the Chrome version is verified end to end, and a Safari port is in progress. This is what it is, why I built it, and what's still open.