diff --git a/conductor/tracks/stabilize_core_20251226/plan.md b/conductor/tracks/stabilize_core_20251226/plan.md
index 0dd1795..07a8301 100644
--- a/conductor/tracks/stabilize_core_20251226/plan.md
+++ b/conductor/tracks/stabilize_core_20251226/plan.md
@@ -4,7 +4,7 @@
 
 - [x] Task: Write unit tests for `crates/core/agent/src/lib.rs` f5a5724
 - [x] Task: Write unit tests for `crates/platform/permissions/src/lib.rs` 94c89ce
-- [ ] Task: Write unit tests for `crates/platform/config/src/lib.rs`
+- [x] Task: Write unit tests for `crates/platform/config/src/lib.rs` b4a4a38
 - [ ] Task: Conductor - User Manual Verification 'Core Agent & Platform Testing' (Protocol in workflow.md)
 
 ## Phase 2: Documentation Audit & Standardization