Fix #349: Improve compact error messages, remove bogus merge suggestion, add daemon/maintenance docs

- bd-1h8: Add --no-daemon hint to compact error messages
- bd-8ql: Replace non-existent merge command with actionable guidance
- bd-ayw: Add 'When to use daemon mode' decision tree to daemon.md
- bd-keb: Add database maintenance section to QUICKSTART.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cmd/bd/compact.go

@@ -105,11 +105,13 @@ Examples:
 		if compactAnalyze {
 			if err := ensureDirectMode("compact --analyze requires direct database access"); err != nil {
 				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+				fmt.Fprintf(os.Stderr, "Hint: Use --no-daemon flag to bypass daemon and access database directly\n")
 				os.Exit(1)
 			}
 			sqliteStore, ok := store.(*sqlite.SQLiteStorage)
 			if !ok {
-				fmt.Fprintf(os.Stderr, "Error: compact requires SQLite storage\n")
+				fmt.Fprintf(os.Stderr, "Error: failed to open database in direct mode\n")
+				fmt.Fprintf(os.Stderr, "Hint: Ensure .beads/beads.db exists and is readable\n")
 				os.Exit(1)
 			}
 			runCompactAnalyze(ctx, sqliteStore)
@@ -120,6 +122,7 @@ Examples:
 		if compactApply {
 			if err := ensureDirectMode("compact --apply requires direct database access"); err != nil {
 				fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+				fmt.Fprintf(os.Stderr, "Hint: Use --no-daemon flag to bypass daemon and access database directly\n")
 				os.Exit(1)
 			}
 			if compactID == "" {
@@ -132,7 +135,8 @@ Examples:
 			}
 			sqliteStore, ok := store.(*sqlite.SQLiteStorage)
 			if !ok {
-				fmt.Fprintf(os.Stderr, "Error: compact requires SQLite storage\n")
+				fmt.Fprintf(os.Stderr, "Error: failed to open database in direct mode\n")
+				fmt.Fprintf(os.Stderr, "Hint: Ensure .beads/beads.db exists and is readable\n")
 				os.Exit(1)
 			}
 			runCompactApply(ctx, sqliteStore)

cmd/bd/duplicates.go

@@ -82,9 +82,13 @@ Example:
 					sources = append(sources, issue.ID)
 				}
 			}
-			// TODO: performMerge implementation pending
-			// For now, just generate the command suggestion
-			cmd := fmt.Sprintf("bd merge %s --into %s", strings.Join(sources, " "), target.ID)
+			// Generate actionable command suggestion
+			cmd := fmt.Sprintf("# Duplicate: %s (same content as %s)\n# Suggested action: bd close %s && bd dep add %s %s --type related",
+				strings.Join(sources, " "),
+				target.ID,
+				strings.Join(sources, " "),
+				strings.Join(sources, " "),
+				target.ID)
 			mergeCommands = append(mergeCommands, cmd)
 			
 			if autoMerge || dryRun {
@@ -134,8 +138,9 @@ Example:
 						sources = append(sources, issue.ID)
 					}
 				}
-				fmt.Printf("  %s bd merge %s --into %s\n\n",
-					cyan("Suggested:"), strings.Join(sources, " "), target.ID)
+				fmt.Printf("  %s Duplicate: %s (same content as %s)\n", cyan("Note:"), strings.Join(sources, " "), target.ID)
+				fmt.Printf("  %s bd close %s && bd dep add %s %s --type related\n\n",
+					cyan("Suggested:"), strings.Join(sources, " "), strings.Join(sources, " "), target.ID)
 			}
 			if autoMerge {
 				if dryRun {
@@ -245,11 +250,12 @@ func formatDuplicateGroupsJSON(groups [][]*types.Issue, refCounts map[string]int
 			}
 		}
 		result = append(result, map[string]interface{}{
-			"title":               group[0].Title,
-			"issues":              issues,
-			"suggested_target":    target.ID,
-			"suggested_sources":   sources,
-			"suggested_merge_cmd": fmt.Sprintf("bd merge %s --into %s", strings.Join(sources, " "), target.ID),
+			"title":             group[0].Title,
+			"issues":            issues,
+			"suggested_target":  target.ID,
+			"suggested_sources": sources,
+			"suggested_action":  fmt.Sprintf("bd close %s && bd dep add %s %s --type related", strings.Join(sources, " "), strings.Join(sources, " "), target.ID),
+			"note":              fmt.Sprintf("Duplicate: %s (same content as %s)", strings.Join(sources, " "), target.ID),
 		})
 	}
 	return result

commands/daemon.md

@@ -19,6 +19,24 @@ Each project runs its own daemon at `.beads/bd.sock` for complete database isola
 
 **Note:** Global daemon support was removed in v0.16.0. The `--global` flag is no longer functional.
 
+## When to Use Daemon Mode
+
+**✅ You SHOULD use daemon mode if:**
+- Working in a team with git remote sync
+- Want automatic commit/push of issue changes
+- Need background auto-sync (5-second debounce)
+- Making frequent bd commands (performance benefit from connection pooling)
+
+**❌ You DON'T need daemon mode if:**
+- Solo developer with local-only tracking
+- Working in git worktrees (use --no-daemon to avoid conflicts)
+- Running one-off commands or scripts
+- Debugging database issues (direct mode is simpler)
+
+**Local-only users:** Direct mode (default without daemon) is perfectly fine. The daemon mainly helps with git sync automation. You can still use `bd sync` manually when needed.
+
+**Performance note:** For most operations, the daemon provides minimal performance benefit. The main value is automatic JSONL export (5s debounce) and optional git sync (--auto-commit, --auto-push).
+
 ## Common Operations
 
 - **Start**: `bd daemon` (auto-starts on first `bd` command)

docs/QUICKSTART.md

@@ -172,6 +172,31 @@ After upgrading bd, use `bd migrate` to check for and migrate old database files
 
 **AI agents:** Use `--inspect` to analyze migration safety before running. The system verifies required config keys and data integrity invariants.
 
+## Database Maintenance
+
+As your project accumulates closed issues, the database grows. Manage size with these commands:
+
+```bash
+# View compaction statistics
+bd compact --stats
+
+# Preview compaction candidates (30+ days closed)
+bd compact --analyze --json --no-daemon
+
+# Apply agent-generated summary
+bd compact --apply --id bd-42 --summary summary.txt --no-daemon
+
+# Immediately delete closed issues (CAUTION: permanent!)
+bd cleanup --force
+```
+
+**When to compact:**
+- Database file > 10MB with many old closed issues
+- After major project milestones when old issues are no longer relevant
+- Before archiving a project phase
+
+**Note:** Compaction is permanent graceful decay. Original content is discarded but viewable via `bd restore <id>` from git history.
+
 ## Advanced: Agent Mail (Optional)
 
 For **multi-agent workflows** (2+ AI agents working concurrently), Agent Mail provides real-time coordination: