# third_party/ OCA addons vendored into this repo, each pinned to a commit SHA — never a branch. A moving branch inside a pinned image breaks the build later with no obvious cause (CLAUDE.md §2). Nothing is vendored yet. The first entry will be OCA `web_responsive` (see O9, `mc_education_theme`) — the stock Community backend needs it and Studio is out of scope. When adding an addon: ```bash git subtree add --prefix=third_party/ --squash ``` Record the SHA and the reason it was pinned in this file.