diff --git a/README.md b/README.md
index 4f1924b..b961f85 100644
--- a/README.md
+++ b/README.md
@@ -69,8 +69,10 @@ AI assistants are structurally optimized to be agreeable. This creates reinforce
 
 - **Layer 1 — Behavioral instructions** — SKILL.md rules that modify Claude's behavior: no unearned affirmations, mandatory risk identification, pattern naming
 - **Layer 2 — Programmatic detection** — 4 hooks that measure session duration, dependency language, rapid-fire bursts, edit ratios, and late-night usage with progressive alerts
+- **Layer 3 — Interaction reports** — `/interaction-report` slash command for aggregated session statistics across configurable timeframes (weekly, monthly, all-time). Opt-in
+- **Layer 4 — Contemplative references** — optional references to contemplative approaches when interaction flags are elevated. Opt-in
 
-Research-informed thresholds. Alerts are progressive and never blocking. Privacy-first: prompt text is never logged.
+Research-informed thresholds. Alerts are progressive and never blocking. Privacy-first: prompt text is never logged. Layers 3 and 4 are off by default.
 
 1 skill · 1 command · 4 hooks