diff --git a/docs/INDEX.md b/docs/INDEX.md
index e7ab6a1..68bdc62 100644
--- a/docs/INDEX.md
+++ b/docs/INDEX.md
@@ -1,7 +1,7 @@
 # smorch-dev — Documentation Index
 
 **All guides, SOPs, and artifacts created during the internal dev plugin rollout.**
-Last updated: 2026-04-23 — `docs/guides/` promoted to canonical SSOT for all dev guides.
+Last updated: 2026-05-28 — added Guide 06 (Team OS Guide) post v1.6.0 release.
 
 ## Canonical guides (start here)
 
@@ -15,6 +15,7 @@ All dev-related how-to guides live at **`docs/guides/`**. No dev guide lives out
 | [`docs/guides/03-CUSTOMIZE-DEV-PLUGIN.md`](guides/03-CUSTOMIZE-DEV-PLUGIN.md) | When to use a non-`smorch-dev` plugin |
 | [`docs/guides/04-SETUP-ENVIRONMENT.md`](guides/04-SETUP-ENVIRONMENT.md) | Fresh machine install (eng / QA / server) |
 | [`docs/guides/05-PLUGIN-COMPLETE-GUIDE.md`](guides/05-PLUGIN-COMPLETE-GUIDE.md) | **Complete plugin guide** — 3-layer architecture, every command + skill, 3 dev scenarios, newcomer Q&A |
+| [`docs/guides/06-TEAM-USER-GUIDE.md`](guides/06-TEAM-USER-GUIDE.md) | **Team OS Guide** — strategic + scenario-driven; 12 scenarios teaching judgment for eng + QA. **Start here on Day 1.** |
 | [`docs/guides/README.md`](guides/README.md) | Guides SSOT policy + update flow |
 
 ---
@@ -23,9 +24,10 @@ All dev-related how-to guides live at **`docs/guides/`**. No dev guide lives out
 
 | Who | First read | Second read |
 |-----|-----------|-------------|
-| **Mamoun** (founder) | YOUTUBE-10-STEPS.md | GUIDE-EXISTING-REPO.md |
-| **Lana** (half QA, half Dev) | GUIDE-QA-LANA.md | GUIDE-EXISTING-REPO.md |
-| **New engineering hire** | SOP-17 → GUIDE-NEW-PROJECT.md | GUIDE-EXISTING-REPO.md |
+| **Mamoun** (founder) | YOUTUBE-10-STEPS.md | guides/06-TEAM-USER-GUIDE.md (refresh of OS) |
+| **Lana** (half QA, half Dev) | guides/06-TEAM-USER-GUIDE.md (Parts 4 + 6 esp.) | GUIDE-QA-LANA.md |
+| **New engineering hire** | guides/06-TEAM-USER-GUIDE.md (end-to-end, Day 1) | SOP-17 → guides/05-PLUGIN-COMPLETE-GUIDE.md |
+| **New QA hire** | guides/06-TEAM-USER-GUIDE.md (Parts 1-4, esp. Scenarios 8 + 11 + QA-track flows) | GUIDE-QA-LANA.md + SOP-13 |
 | **EO student** | eo-microsaas-dev README (separate repo) | EO-Brain phases 0-5 |
 | **Cowork team** | COWORK-REVAMP docs (in EO-Students/) | — |