brew upgrade doesn't pick up new formula versions

[BrooksFlannery]

Problem

brew upgrade onton doesn't detect new versions after a release. Running the standard upgrade flow reports the old version as already installed:

$ brew outdated onton
$ brew upgrade onton
Warning: flowglad/onton/onton 0.8.3 already installed

This happened with 0.8.7 — the formula on main was updated, but the local tap clone was stuck 20+ commits behind. brew update did not fetch the latest from the tap.

Root cause

The Homebrew tap points to the full project repo (flowglad/onton) rather than a dedicated flowglad/homebrew-onton repo. Homebrew's brew update uses an optimized fetch strategy for taps that doesn't reliably pull updates from non-standard tap repos (ones not named homebrew-* and containing lots of non-formula content).

Workaround

Manually pull the tap repo:

git -C $(brew --repo flowglad/onton) pull origin main
brew upgrade onton

Suggested fix

Create a separate flowglad/homebrew-onton repo containing only the Formula/ directory. Update the release workflow to push formula changes there. This follows the Homebrew tap convention and brew update handles these repos reliably.

Users would then install via:

brew tap flowglad/onton
brew install onton

(Same UX — Homebrew automatically resolves flowglad/onton to the flowglad/homebrew-onton repo.)