feat: Distinct prefixes for protos, molecules, wisps (bd-hobo)

Added type-specific ID prefixes for better visual recognition:
- `bd pour` now generates IDs with "mol-" prefix
- `bd wisp create` now generates IDs with "wisp-" prefix
- Regular issues continue using the configured prefix

Implementation:
- Added IDPrefix field to types.Issue (internal, not exported to JSONL)
- Added Prefix field to CloneOptions for spawning operations
- Added IDPrefix to RPC CreateArgs for daemon communication
- Updated storage layer to use issue.IDPrefix when generating IDs
- Updated pour.go and wisp.go to pass appropriate prefixes

This enables instant visual recognition of entity types and prevents
accidental modification of templates.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/rpc/protocol.go

@@ -89,6 +89,8 @@ type CreateArgs struct {
 	Sender string `json:"sender,omitempty"` // Who sent this (for messages)
 	Wisp   bool   `json:"wisp,omitempty"`   // Wisp = ephemeral vapor from the Steam Engine; bulk-deleted when closed
 	RepliesTo string `json:"replies_to,omitempty"` // Issue ID for conversation threading
+	// ID generation (bd-hobo)
+	IDPrefix string `json:"id_prefix,omitempty"` // Override prefix for ID generation (mol, wisp, etc.)
 }
 
 // UpdateArgs represents arguments for the update operation

internal/rpc/server_issues_epics.go

@@ -179,6 +179,8 @@ func (s *Server) handleCreate(req *Request) Response {
 		Sender: createArgs.Sender,
 		Wisp:   createArgs.Wisp,
 		// NOTE: RepliesTo now handled via replies-to dependency (Decision 004)
+		// ID generation (bd-hobo)
+		IDPrefix: createArgs.IDPrefix,
 	}
 	
 	// Check if any dependencies are discovered-from type

internal/storage/sqlite/queries.go

@@ -153,9 +153,9 @@ func (s *SQLiteStorage) CreateIssue(ctx context.Context, issue *types.Issue, act
 	}()
 
 	// Get prefix from config (needed for both ID generation and validation)
-	var prefix string
-	err = conn.QueryRowContext(ctx, `SELECT value FROM config WHERE key = ?`, "issue_prefix").Scan(&prefix)
-	if err == sql.ErrNoRows || prefix == "" {
+	var configPrefix string
+	err = conn.QueryRowContext(ctx, `SELECT value FROM config WHERE key = ?`, "issue_prefix").Scan(&configPrefix)
+	if err == sql.ErrNoRows || configPrefix == "" {
 		// CRITICAL: Reject operation if issue_prefix config is missing (bd-166)
 		// This prevents duplicate issues with wrong prefix
 		return fmt.Errorf("database not initialized: issue_prefix config is missing (run 'bd init --prefix <prefix>' first)")
@@ -163,6 +163,12 @@ func (s *SQLiteStorage) CreateIssue(ctx context.Context, issue *types.Issue, act
 		return fmt.Errorf("failed to get config: %w", err)
 	}
 
+	// Use IDPrefix override if set, otherwise use config prefix (bd-hobo)
+	prefix := configPrefix
+	if issue.IDPrefix != "" {
+		prefix = issue.IDPrefix
+	}
+
 	// Generate or validate ID
 	if issue.ID == "" {
 		// Generate hash-based ID with adaptive length based on database size (bd-ea2a13)

internal/storage/sqlite/transaction.go

@@ -138,15 +138,21 @@ func (t *sqliteTxStorage) CreateIssue(ctx context.Context, issue *types.Issue, a
 	}
 
 	// Get prefix from config (needed for both ID generation and validation)
-	var prefix string
-	err = t.conn.QueryRowContext(ctx, `SELECT value FROM config WHERE key = ?`, "issue_prefix").Scan(&prefix)
-	if err == sql.ErrNoRows || prefix == "" {
+	var configPrefix string
+	err = t.conn.QueryRowContext(ctx, `SELECT value FROM config WHERE key = ?`, "issue_prefix").Scan(&configPrefix)
+	if err == sql.ErrNoRows || configPrefix == "" {
 		// CRITICAL: Reject operation if issue_prefix config is missing (bd-166)
 		return fmt.Errorf("database not initialized: issue_prefix config is missing (run 'bd init --prefix <prefix>' first)")
 	} else if err != nil {
 		return fmt.Errorf("failed to get config: %w", err)
 	}
 
+	// Use IDPrefix override if set, otherwise use config prefix (bd-hobo)
+	prefix := configPrefix
+	if issue.IDPrefix != "" {
+		prefix = issue.IDPrefix
+	}
+
 	// Generate or validate ID
 	if issue.ID == "" {
 		// Generate hash-based ID with adaptive length based on database size (bd-ea2a13)

internal/types/types.go

@@ -32,6 +32,7 @@ type Issue struct {
 	CompactedAtCommit  *string        `json:"compacted_at_commit,omitempty"` // Git commit hash when compacted
 	OriginalSize       int            `json:"original_size,omitempty"`
 	SourceRepo         string         `json:"-"` // Internal: Which repo owns this issue (multi-repo support) - NOT exported to JSONL
+	IDPrefix           string         `json:"-"` // Internal: Override prefix for ID generation (bd-hobo) - NOT exported to JSONL
 	Labels             []string       `json:"labels,omitempty"` // Populated only for export/import
 	Dependencies       []*Dependency  `json:"dependencies,omitempty"` // Populated only for export/import
 	Comments           []*Comment     `json:"comments,omitempty"`     // Populated only for export/import