fix(ready): exclude molecule steps from bd ready by default (#1246)

* fix(ready): exclude molecule steps from bd ready by default (GH#1239)

Add ID prefix constants (IDPrefixMol, IDPrefixWisp) to types.go as single
source of truth. Update pour.go and wisp.go to use these constants.

GetReadyWork now excludes issues with -mol- in their ID when no explicit
type filter is specified. Users can still see mol steps with --type=task.

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

* feat(ready): config-driven ID pattern exclusion (GH#1239)

Add ready.exclude_id_patterns config for excluding IDs from bd ready.
Default patterns: -mol-, -wisp- (molecule steps and wisps).

Changes:
- Add IncludeMolSteps to WorkFilter for internal callers
- Update findGateReadyMolecules and getMoleculeCurrentStep to use it
- Make exclusion patterns config-driven via ready.exclude_id_patterns
- Remove hardcoded MolStepIDPattern() in favor of config
- Add test for custom patterns (e.g., gastown's -role-)

Usage: bd config set ready.exclude_id_patterns "-mol-,-wisp-,-role-"

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

* docs: remove -role- example from ready.go comments

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

* docs: remove GH#1239 references from code comments

Issue references belong in commit messages, not code.

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

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

internal/types/types.go

@@ -1007,6 +1007,11 @@ type WorkFilter struct {
 
 	// Time-based deferral filtering (GH#820)
 	IncludeDeferred bool // If true, include issues with future defer_until timestamps
+
+	// Molecule step filtering
+	// By default, GetReadyWork excludes mol/wisp steps (IDs containing -mol- or -wisp-)
+	// Set to true for internal callers that need to see mol steps (e.g., findGateReadyMolecules)
+	IncludeMolSteps bool
 }
 
 // StaleFilter is used to filter stale issue queries
@@ -1041,6 +1046,15 @@ const (
 	BondTypeRoot        = "root"        // Marks the primary/root component
 )
 
+// ID prefix constants for molecule/wisp instantiation.
+// These prefixes are inserted into issue IDs: <project>-<prefix>-<id>
+// Used by: cmd/bd/pour.go, cmd/bd/wisp.go (ID generation)
+// Exclusion from bd ready is config-driven via ready.exclude_id_patterns (default: -mol-,-wisp-)
+const (
+	IDPrefixMol  = "mol"  // Persistent molecules (bd-mol-xxx)
+	IDPrefixWisp = "wisp" // Ephemeral wisps (bd-wisp-xxx)
+)
+
 // IsCompound returns true if this issue is a compound (bonded from multiple sources).
 func (i *Issue) IsCompound() bool {
 	return len(i.BondedFrom) > 0