Editing a factory skill

The factory actions run skills from tessl/factory. The user has two ways to change what a skill does.

Add instructions

For a small change, keep the published skill and add instructions to the action in tessl.json, for example "Run bun run lint before you push." The user keeps getting fixes when tessl/factory is updated.

Use an own copy

For a larger change, copy the skill into the repository and point the action at the copy. The user owns the copy and no longer gets fixes from tessl/factory. Tell the user this before you copy.

1. In a new empty directory outside the repository, run git init, write {"name": "factory-copy", "dependencies": {}} to tessl.json, and run tessl install tessl/factory --yes.
2. Copy .tessl/plugins/tessl/factory/skills/<skill> from that directory to tessl-factory/skills/<skill> in the repository.
3. Write tessl-factory/.tessl-plugin/plugin.json with name set to <workspace>/<repo>-factory, version 0.1.0, a one-line description, private true, and a skills entry for each copied skill. If the file exists, add the new skill to its skills list.
4. In tessl.json, change the action's skill to file:tessl-factory#<skill>.
5. Run tessl doctor --automations.
6. Make the change the user asked for in the copied SKILL.md with the write-factory-skill skill. Keep its "Invariants" section.

The change takes effect after it merges to the default branch.