As far as I can tell this basically changes the template file to use bun instead of yarn. The run script is created from template but intended to be owned by the user, so they can already manually change the yarn installs => bun installs. If you want to continue working on it, then let's change scope so that changes in this PR would detect package manager, say npm/yarn/bun (pnpm might be more difficult due to need for hoisting which is not the default) and make reassure-tests.sh a template file that would be transformed when doing init to use. whatever Pkg Mgr user selected

Thanks for clarifying the intended scope. I updated the PR in 44fda7d to detect npm, Yarn, and Bun from packageManager or lockfiles, then render a single reassure-tests.sh template with the matching commands. Explicit packageManager values take precedence and Yarn remains the fallback.

I also added coverage for all three declarations, npm/Yarn/Bun lockfiles, stale-lockfile precedence, executable mode, and complete placeholder rendering. yarn validate, yarn format:check, yarn build, and all 10 focused CLI tests pass.