Setup Snappedly skills

Create or update the per-repo configuration that Snappedly skills read: the docs/agents/*.md files, seeded from the templates beside this file, and the root AGENTS.md.

Repeat runs

On a repeat run, AGENTS.md and docs/agents/*.md hold the team's recorded choices. Compare them with the repository and this skill's current requirements, and preserve each choice unless the user requests a change or it fails a current requirement. A new default alone does not replace a recorded choice. Draft from the existing configuration, using the templates only to fill missing content.

Older configuration needs these migrations as part of the run, without a separate request: