docs: add 0.26.1 release notes to CHANGELOG and info.go

CHANGELOG.md

@@ -7,7 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.26.0] - 2025-11-27
+## [0.26.1] - 2025-11-29
+
+### Fixed
+
+- **CRITICAL: Reverse ZFC Check (bd-53c)**: Prevents stale database from corrupting JSONL
+  - Root cause: `bd sync` exports DB to JSONL before pulling from remote
+  - If local DB is stale (fewer issues than JSONL), stale data would corrupt the JSONL
+  - Added reverse ZFC check: detects when JSONL has >20% more issues than DB
+  - When detected, imports JSONL first to sync database before any export
+  - Prevents fresh/stale clones from exporting incomplete database state
 
 ## [0.26.0] - 2025-11-27
 

cmd/bd/info.go

@@ -287,6 +287,15 @@ type VersionChange struct {
 
 // versionChanges contains agent-actionable changes for recent versions
 var versionChanges = []VersionChange{
+	{
+		Version: "0.26.1",
+		Date:    "2025-11-29",
+		Changes: []string{
+			"CRITICAL FIX (bd-53c): Reverse ZFC check prevents stale DB from corrupting JSONL",
+			"bd sync now detects when JSONL has more issues than DB and imports first",
+			"Prevents fresh/stale clones from exporting incomplete database state",
+		},
+	},
 	{
 		Version: "0.26.0",
 		Date:    "2025-11-27",