diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index 7769de4..9c2f214 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -6,7 +6,7 @@ This roadmap orchestrates a comprehensive security audit of Linux Hello, a Rust-
 
 ## Phases
 
-- [ ] **Phase 1: Architecture & Threat Modeling** - Establish security context and identify attack surface
+- [x] **Phase 1: Architecture & Threat Modeling** - Establish security context and identify attack surface
 - [ ] **Phase 2: Rust-Specific Code Security Review** - Identify Rust vulnerabilities and unsafe code issues
 - [ ] **Phase 3: Cryptographic Implementation Audit** - Verify cryptographic implementations follow best practices
 - [ ] **Phase 4: Biometric-Specific Security Audit** - Address unique biometric authentication concerns
@@ -103,7 +103,7 @@ Plans:
 
 | Phase | Plans | Status | Completed |
 |-------|-------|--------|-----------|
-| 1. Architecture & Threat Modeling | 2 plans in 2 waves | Not started | - |
+| 1. Architecture & Threat Modeling | 2 plans in 2 waves | ✓ Complete | 100% |
 | 2. Rust-Specific Code Security Review | TBD | Not started | - |
 | 3. Cryptographic Implementation Audit | TBD | Not started | - |
 | 4. Biometric-Specific Security Audit | TBD | Not started | - |