feat(self-check): command-restates-standard lint (consistency category, VERSION 1.4.2)

Task 3 leftover. Adds a 'consistency' category to /self-check that catches a standard
drifting back into restating/contradicting the command that owns the rule -- the Syncro
timers failure mode (standard said 'always timer' while /syncro said 'outlier only').

Deterministic half: each manifest.command_standard_links pair's standard must still carry
its defer-to-SSOT pointer (must_reference regex). Lost pointer = WARN. Seeded with
syncro-billing (time-entry-protocol.md -> /syncro). Semantic contradiction pass delegated
to the model in SKILL.md, mirroring check_memory. Verified PASS; negative-tested.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.claude/skills/self-check/baseline/manifest.json

@@ -18,6 +18,16 @@
     "guard_wired_in": ".claude/scripts/sync.sh"
   },
 
+  "command_standard_links": [
+    {
+      "topic": "syncro-billing",
+      "standard": ".claude/standards/syncro/time-entry-protocol.md",
+      "must_reference": "syncro\\.md|single source of truth",
+      "why": "the time-entry standard must DEFER to the /syncro command (one SSOT), not restate billing mechanics. A past drift had the standard say 'always timer' while the command said 'outlier only' — losing the pointer is the early warning of that re-drift."
+    }
+  ],
+  "command_standard_links_note": "Deterministic half of the command-restates-standard lint: each linked standard must contain a defer-to-SSOT pointer (must_reference, a grep -iE regex). A WARN means the standard may have drifted back into restating/contradicting the command. The SEMANTIC contradiction judgement (read both files, decide if they actually conflict) is delegated to the model in SKILL.md, mirroring the memory contradiction pass.",
+
   "required_tools": [
     { "name": "bash",   "why": "hooks, scripts, sync, vault wrapper" },
     { "name": "git",    "why": "repo + submodules + Gitea sync" },