diff --git a/fktry/src/contracts.ts b/fktry/src/contracts.ts
index 8053743..9b8a68d 100644
--- a/fktry/src/contracts.ts
+++ b/fktry/src/contracts.ts
@@ -166,8 +166,9 @@ export interface CorrectionUnit {
   id: number;
   kind: 'checksum-warden' | 'redundancy-gunship' | 'hash-auditor';
   pos: Vec2;
-  /** sim-defined phase, e.g. 'approach' | 'audit' | 'tether' | 'prescan' | 'stasis' | 'leaving' */
-  phase: string;
+  /** v9.1 PINNED (SCREEN string-matches this; a free string was a silent-miss trap):
+   * the full lifecycle vocabulary. SIM: request additions via NOTES, never invent. */
+  phase: 'approach' | 'audit' | 'tether' | 'prescan' | 'stasis' | 'leaving';
   progress: number;                 // 0..1 of current phase
   target?: number;                  // warden: audited entity; gunship: the PARITY ANCHOR
   rect?: { x: number; y: number; w: number; h: number }; // gunship sector / auditor stasis