diff --git a/README.md b/README.md
index 7b83c78..584716b 100644
--- a/README.md
+++ b/README.md
@@ -46,20 +46,21 @@ Key commands: `/security posture`, `/security audit`, `/security scan`, `/securi
 
 ---
 
-### [Config-Audit](plugins/config-audit/) `v3.1.0`
+### [Config-Audit](plugins/config-audit/) `v4.0.0`
 
-Configuration intelligence for Claude Code — health checks, feature discovery, auto-fix, and active-config inventory.
+Configuration intelligence for Claude Code — health checks, feature discovery, auto-fix, active-config inventory, and Opus-4.7-aware token-cost analysis.
 
-Claude Code reads instructions from 7+ file types across multiple scopes. This plugin tells you what's wrong, what's missing, what's silently conflicting, and now — what's actually loaded:
+Claude Code reads instructions from 7+ file types across multiple scopes. This plugin tells you what's wrong, what's missing, what's silently conflicting, what's actually loaded, and where you're burning tokens unnecessarily:
 
-- **Health** — 7 deterministic scanners verify correctness across every configuration file (broken imports, deprecated settings, conflicting rules, permission contradictions)
+- **Health** — 8 deterministic scanners verify correctness across every configuration file (broken imports, deprecated settings, conflicting rules, permission contradictions, and Opus-4.7-era token waste)
 - **Opportunities** — context-aware recommendations for Claude Code features you're not using
 - **Action** — auto-fix with mandatory backups, syntax validation, rollback support, and human-in-the-loop workflow
 - **What's active** — read-only inventory of plugins, skills, MCP servers, hooks, and CLAUDE.md cascade for a repo, with token estimates
+- **Token hotspots** — `/config-audit tokens` ranks files by estimated waste against 4 Opus-4.7 patterns (cache-breaking volatile content, redundant tool permissions, deep import chains, sonnet-era setups)
 
-Key commands: `/config-audit posture`, `/config-audit feature-gap`, `/config-audit fix`, `/config-audit whats-active`
+Key commands: `/config-audit posture`, `/config-audit feature-gap`, `/config-audit fix`, `/config-audit whats-active`, `/config-audit tokens`
 
-6 agents · 8 scanners · 16 commands · 522+ tests
+6 agents · 9 scanners · 17 commands · 543+ tests
 
 → [Full documentation](plugins/config-audit/README.md)