diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0e0d375..22c73648 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,63 @@ All notable changes to the beads project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.40.0] - 2025-12-28
+
+### Added
+
+- **`bd worktree` command** - Parallel development support
+  - Manage git worktrees with beads integration
+  - Enables working on multiple issues simultaneously
+
+- **`bd slot` commands** - Agent bead slot management
+  - Track agent assignments with dedicated slot operations
+  - Supports Gas Town multi-agent workflows
+
+- **`bd agent state` command** - ZFC-compliant state reporting
+  - Report agent state in standardized format
+  - Enables machine-readable status checks
+
+- **`bd doctor --deep`** - Full graph integrity validation
+  - Deep validation of bead dependency graphs
+  - Includes agent bead integrity checks
+
+- **Agent bead support** - New bead types
+  - `type=agent` and `type=role` for agent tracking
+  - Agent-specific fields in schema (migration 030)
+  - Agent ID pattern validation on create
+
+- **Computed `.parent` field** - JSON output enhancement
+  - Parent field included in JSON for convenience
+  - Simplifies integration with external tools
+
+- **Auto-bypass daemon for wisp operations** - Performance
+  - Ephemeral wisp operations skip daemon overhead
+  - Faster patrol cycle processing
+
+- **Pour warning for vapor-phase formulas** - Safety
+  - Warning when pouring formulas designed for wisps
+  - Prevents accidental persistent molecule creation
+
+### Fixed
+
+- **O(2^n) → O(V+E) cycle detection** (GH#775) - Performance
+  - Replaced exponential algorithm with linear DFS
+  - Dramatic speedup for large dependency graphs
+
+- **Import hash mismatch warnings** - Data integrity
+  - Update jsonl_file_hash on import operations
+  - Prevents spurious hash mismatch warnings
+
+### Changed
+
+- **Community tools documentation** (GH#772, GH#776)
+  - Consolidated into dedicated docs page
+  - Added opencode-beads to community tools list
+
+- **Activity feed improvements** - Better context
+  - Shows title and assignee in activity entries
+  - More informative `bd activity` output
+
 ## [0.39.1] - 2025-12-27
 
 ### Added
diff --git a/cmd/bd/doctor_test.go b/cmd/bd/doctor_test.go
index 0da151a8..a6bd6974 100644
--- a/cmd/bd/doctor_test.go
+++ b/cmd/bd/doctor_test.go
@@ -935,7 +935,7 @@ func TestCheckMetadataVersionTracking(t *testing.T) {
 			name: "slightly outdated version",
 			setupVersion: func(beadsDir string) error {
 				// Use a version that's less than 10 minor versions behind current
-				return os.WriteFile(filepath.Join(beadsDir, ".local_version"), []byte("0.30.0\n"), 0644)
+				return os.WriteFile(filepath.Join(beadsDir, ".local_version"), []byte("0.35.0\n"), 0644)
 			},
 			expectedStatus: doctor.StatusOK,
 			expectWarning:  false,
@@ -944,7 +944,7 @@ func TestCheckMetadataVersionTracking(t *testing.T) {
 			name: "very old version",
 			setupVersion: func(beadsDir string) error {
 				// Use a version that's 10+ minor versions behind current (triggers warning)
-				return os.WriteFile(filepath.Join(beadsDir, ".local_version"), []byte("0.24.0\n"), 0644)
+				return os.WriteFile(filepath.Join(beadsDir, ".local_version"), []byte("0.29.0\n"), 0644)
 			},
 			expectedStatus: doctor.StatusWarning,
 			expectWarning:  true,
diff --git a/cmd/bd/version.go b/cmd/bd/version.go
index 45ea7823..d4de20f5 100644
--- a/cmd/bd/version.go
+++ b/cmd/bd/version.go
@@ -14,7 +14,7 @@ import (
 
 var (
 	// Version is the current version of bd (overridden by ldflags at build time)
-	Version = "0.39.1"
+	Version = "0.40.0"
 	// Build can be set via ldflags at compile time
 	Build = "dev"
 	// Commit and branch the git revision the binary was built from (optional ldflag)
diff --git a/internal/storage/sqlite/migrations_test.go b/internal/storage/sqlite/migrations_test.go
index c1175dc6..a0a8a8ea 100644
--- a/internal/storage/sqlite/migrations_test.go
+++ b/internal/storage/sqlite/migrations_test.go
@@ -466,7 +466,7 @@ func TestMigrateContentHashColumn(t *testing.T) {
 				notes TEXT NOT NULL DEFAULT '',
 				status TEXT NOT NULL CHECK (status IN ('open', 'in_progress', 'blocked', 'closed', 'tombstone')),
 				priority INTEGER NOT NULL,
-				issue_type TEXT NOT NULL CHECK (issue_type IN ('bug', 'feature', 'task', 'epic', 'chore', 'message')),
+				issue_type TEXT NOT NULL CHECK (issue_type IN ('bug', 'feature', 'task', 'epic', 'chore', 'message', 'agent', 'role')),
 				assignee TEXT,
 				estimated_minutes INTEGER,
 				created_at DATETIME NOT NULL,
@@ -496,9 +496,15 @@ func TestMigrateContentHashColumn(t *testing.T) {
 				await_id TEXT DEFAULT '',
 				timeout_ns INTEGER DEFAULT 0,
 				waiters TEXT DEFAULT '',
+				hook_bead TEXT DEFAULT '',
+				role_bead TEXT DEFAULT '',
+				agent_state TEXT DEFAULT '',
+				last_activity DATETIME,
+				role_type TEXT DEFAULT '',
+				rig TEXT DEFAULT '',
 				CHECK ((status = 'closed') = (closed_at IS NOT NULL))
 			);
-			INSERT INTO issues SELECT id, title, description, design, acceptance_criteria, notes, status, priority, issue_type, assignee, estimated_minutes, created_at, '', updated_at, closed_at, external_ref, compaction_level, compacted_at, original_size, compacted_at_commit, source_repo, '', NULL, '', '', '', '', 0, 0, 0, '', '', '', '', '', '', 0, '' FROM issues_backup;
+			INSERT INTO issues SELECT id, title, description, design, acceptance_criteria, notes, status, priority, issue_type, assignee, estimated_minutes, created_at, '', updated_at, closed_at, external_ref, compaction_level, compacted_at, original_size, compacted_at_commit, source_repo, '', NULL, '', '', '', '', 0, 0, 0, '', '', '', '', '', '', 0, '', '', '', '', NULL, '', '' FROM issues_backup;
 			DROP TABLE issues_backup;
 		`)
 		if err != nil {