merge: tick in-body checkboxes from a domain script

# Conflicts:
#	AGENTS.md

AGENTS.md

@@ -47,9 +47,11 @@ the domain layer, it is in the wrong place.
 - `skills/issue` — issues as units of work (`/tea:issue`), entirely offline
   - `references/format.md` — canonical issue format; single source of truth
   - `scripts/issue.py` — domain module: slug identity, parse/render, validation,
-    taxonomy, dependency graph
+    taxonomy, dependency graph, body checkboxes
   - `scripts/issue_new.py` — create a local issue from its type template
   - `scripts/issue_check.py` — validate against the format
+  - `scripts/issue_ac.py` — list the body's checkboxes; tick one by number or
+    substring, changing exactly one character of the file
   - `scripts/issue_tree.py` — draw the dependency graph
   - `scripts/issue_index.py` — rebuild `tmp/issues/INDEX.md`
 - `skills/sync` — move issues between the local store and Gitea (`/tea:sync`)