Remove plans/ directory (P0/P1/P2 work complete)

vfs/types/types.go

@@ -77,11 +77,19 @@ func (fi *FileInfo) UpdateAccessBatched(btu *BatchedTimeUpdate) {
 	fi.AccessCount++
 }
 
-// GetTimeDecayedScore calculates a score based on access time and frequency
-// More recent and frequent accesses get higher scores
-func (fi *FileInfo) GetTimeDecayedScore() float64 {
-	timeSinceAccess := time.Since(fi.ATime).Hours()
+// DecayedScore computes the time-decayed eviction score from scalar snapshot values (aTime, accessCount).
+// This is the canonical implementation of the decay formula (shared to eliminate duplication).
+// Used by FileInfo.GetTimeDecayedScore and by EvictHybrid (memory/disk) for race-free scoring
+// on values captured under RLock.
+func DecayedScore(aTime time.Time, accessCount int) float64 {
+	timeSinceAccess := time.Since(aTime).Hours()
 	decayFactor := 1.0 / (1.0 + timeSinceAccess/24.0) // Decay over days
-	frequencyBonus := float64(fi.AccessCount) * 0.1
+	frequencyBonus := float64(accessCount) * 0.1
 	return decayFactor + frequencyBonus
 }
+
+// GetTimeDecayedScore calculates a score based on access time and frequency
+// More recent and frequent accesses get higher scores.
+func (fi *FileInfo) GetTimeDecayedScore() float64 {
+	return DecayedScore(fi.ATime, fi.AccessCount)
+}