CLAUDE.md: scope down to AILang-specific decisions

With ~/dev/CLAUDE.md now carrying the cross-project dev rules
(English-in-repos, closes #N convention, label vocabulary,
milestone-as-container), the AILang CLAUDE.md no longer needs
to repeat them. Two changes:

- Add an inheritance note at the top spelling out which
  user-level CLAUDE.md files this file extends, so the reader
  knows what is intentionally absent (and where to find it).
- Remove the closes #N sentence from the git-log bullet in the
  "Roles of …" section — that convention lives in ~/dev/CLAUDE.md
  now, where it applies to every project under ~/dev/.

The orchestrator-discipline sections (only-Boss-commits, main
sacrosanct, when-not-to-delegate, design-rationale ≠ effort,
TDD-for-bugs) stay verbatim — they are project-calibrated
scaffolding, not literal duplicates of the templates fragment.

CLAUDE.md

@@ -1,3 +1,11 @@
+Inherits `~/.claude/CLAUDE.md` (chat language, IONOS security)
+and `~/dev/CLAUDE.md` (cross-project dev rules: English in
+repos, commit convention, issue-tracker vocabulary). This file
+carries only AILang-specific decisions on top — the language
+identity, code layout, file-naming convention, in-tree skill
+system, project-calibrated orchestrator discipline, and the
+LLM-utility feature gate.
+
 ## AILang — a language for LLM authors
 
 AILang's only author is an LLM, not a human. It is designed for:
@@ -248,9 +256,7 @@ not retroactively renamed.
   these bodies at commit time; they are the durable record. Read
   recent state with `git log -5 --format=full`; chronological scan
   with `git log --oneline -30`; per-milestone scope with
-  `git log <prev-milestone-close>..HEAD --format=full`. Commits
-  that close a backlog issue reference it via `closes #N` in the
-  body; Gitea auto-closes the issue on push.
+  `git log <prev-milestone-close>..HEAD --format=full`.
 
 - **`docs/specs/<milestone>.md`** (since 2026-05-09): per-milestone
   design spec produced by `skills/brainstorm`. Hard-gate before any