docs+gate: felhom.eu/CLAUDE.md becomes core + path-scoped rules; instructions gate registered (R-229)

227 -> 115 effective lines, split into .claude/rules/{hub,website,manifests,docs}.md, and
repo_gates.py gains gate 6. Trim first, register second: a registered-but-failing gate refuses
every push through the pre-push hook, which is why this repo -- the one that OWNS the gate --
was the only one not running it.

Register discipline and the R-110 installer fence deliberately stayed in the core; both have
triggers no fixed glob covers, and scoping them would have rebuilt the failure class they exist
to prevent.

Scoping proven from the InstructionsLoaded hook log in two fresh sessions, not from frontmatter.

scripts/repo_gates.py

@@ -13,6 +13,14 @@ Gates, in order (all must pass; **non-zero exit on any failure**):
   3. hub-confirm     no native confirm()/prompt() in hub templates
   4. manifest-bearer no bearer-shaped literal anywhere in manifests/
   5. reuse-refs      every path cited by this repo's REUSE.md still resolves
+  6. instructions    CLAUDE.md length/versions/TEMPORARY, rule-file scoping, workspace-copy identity
+
+WHY 6 IS HERE AND WAS NOT (2026-08-06, R-229 deferred leg). instructions_gate.py LIVES in this
+repo's scripts/ and was registered in the controller and agent runners on the day it was written —
+but not in this one, because this repo's own CLAUDE.md was still 27 lines over the ceiling and a
+registered-but-failing gate refuses every push through .githooks/pre-push. The file was trimmed
+(227 -> 115 effective lines, core + .claude/rules/) and the gate registered in the same session.
+A check that does not run in the place it applies is the exact failure the R-29 gate census found.
 
 WHY THIS FILE EXISTS (2026-08-02, closing R-29 leg (a) and half of leg (b)).
 
@@ -49,6 +57,7 @@ GATES = [
     ("hub-confirm",     os.path.join(SCRIPTS, "hub_confirm_gate.py"),   [],       True),
     ("manifest-bearer", os.path.join(SCRIPTS, "manifest_bearer_gate.py"), [],     True),
     ("reuse-refs",      os.path.join(SCRIPTS, "reuse_refs_check.py"),   [ROOT],   True),
+    ("instructions",    os.path.join(SCRIPTS, "instructions_gate.py"),  [ROOT],   True),
 ]
 
 VERDICT = {0: "OK", 1: "FAILED", 2: "INCONCLUSIVE"}