The engineering skills (to-tickets, triage, spec, wayfinder) need to know
where issues live for this repo. It is not the Gitea forge remote; it is
bd/beads, which AGENTS.md already mandates for all task tracking.
Adds docs/agents/issue-tracker.md (bd commands and wayfinding mapping),
docs/agents/triage-labels.md (five canonical roles kept as-is, applied
with bd tag / bd label add), docs/agents/domain.md (single-context
layout: CONTEXT.md plus docs/adr/ at the root), and an 'Agent skills'
index block in AGENTS.md. The pre-existing staged deletion of CLAUDE.md
is left out of this commit and stays in the index.
