chore: add agent skills configuration

Add CLAUDE.md and docs/agents/ with issue tracker (Gitea), triage labels, and domain doc consumer rules.

docs/agents/domain.md

@@ -0,0 +1,21 @@
+# Domain Docs
+
+## Before exploring, read these
+
+- `CONTEXT.md` at the repo root, or
+- `CONTEXT-MAP.md` at the root if it exists — points at one `CONTEXT.md` per context
+- `docs/adr/` — read ADRs touching the area you're about to work in
+
+If any of these don't exist, proceed silently.
+
+## File structure
+
+Single-context repo: `CONTEXT.md` + `docs/adr/` at root.
+
+## Use the glossary's vocabulary
+
+Use domain terms as defined in `CONTEXT.md`. Don't drift to synonyms the glossary explicitly avoids.
+
+## Flag ADR conflicts
+
+If your output contradicts an existing ADR, surface it explicitly rather than silently overriding.