Adopt HarnessTap in an existing repository

This walkthrough demonstrates adopting HarnessTap in a repository that already contains project files (the scan-project fixture). It covers the full flow from initialisation through applying a layer and confirming the final state.

Tape: ../tapes/01-existing-repo-adoption.tape (CLI repo tape)

Commands

1. harnesstap init — initialise HarnessTap in the repository
2. harnesstap scan . — detect existing resources
3. harnesstap resource list — review discovered resources
4. harnesstap layer list --search foundation --remote-only — browse catalog layers
5. harnesstap layer apply engineering-foundation — apply a layer
6. harnesstap status . — confirm the final state