feat: add workspace-isolated toolhost runtime and capability-gap skill loop

internal/memory/store_sqlite.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"sort"
+	"strings"
 	"time"
 
 	"laodingbot/internal/logger"
@@ -110,6 +112,154 @@ func (s *SQLiteStore) LoadRecent(chatID string, limit int) ([]Message, error) {
 	return messages, nil
 }
 
+func (s *SQLiteStore) SaveCapabilityGap(chatID, userID, intent, reason string) error {
+	_, err := s.db.Exec(`
+		INSERT INTO capability_gaps(chat_id, user_id, intent, reason, created_at)
+		VALUES (?, ?, ?, ?, ?)
+	`, chatID, userID, intent, reason, time.Now().UTC())
+	if err != nil && s.log != nil {
+		s.log.Errorf("save capability gap failed chat_id=%s user_id=%s err=%v", chatID, userID, err)
+	}
+	return err
+}
+
+func (s *SQLiteStore) TopCapabilityGaps(limit int) ([]CapabilityGap, error) {
+	if limit <= 0 {
+		limit = 20
+	}
+	rows, err := s.db.Query(`
+		SELECT id, chat_id, user_id, intent, reason, created_at
+		FROM capability_gaps
+		ORDER BY id DESC
+		LIMIT ?
+	`, limit)
+	if err != nil {
+		if s.log != nil {
+			s.log.Errorf("top capability gaps query failed err=%v", err)
+		}
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := make([]CapabilityGap, 0, limit)
+	for rows.Next() {
+		var item CapabilityGap
+		if err := rows.Scan(&item.ID, &item.ChatID, &item.UserID, &item.Intent, &item.Reason, &item.CreatedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, item)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (s *SQLiteStore) TopCapabilityGapClusters(limit int, since time.Time) ([]CapabilityGapCluster, error) {
+	if limit <= 0 {
+		limit = 20
+	}
+	if since.IsZero() {
+		since = time.Now().UTC().Add(-7 * 24 * time.Hour)
+	}
+
+	rows, err := s.db.Query(`
+		SELECT intent, reason, created_at
+		FROM capability_gaps
+		WHERE created_at >= ?
+	`, since)
+	if err != nil {
+		if s.log != nil {
+			s.log.Errorf("top capability gap clusters query failed err=%v", err)
+		}
+		return nil, err
+	}
+	defer rows.Close()
+
+	type groupKey struct {
+		IntentKey string
+		Reason    string
+	}
+	type agg struct {
+		cluster CapabilityGapCluster
+	}
+
+	groups := map[groupKey]agg{}
+	for rows.Next() {
+		var intent string
+		var reason string
+		var createdAt time.Time
+		if err := rows.Scan(&intent, &reason, &createdAt); err != nil {
+			return nil, err
+		}
+		intentKey := normalizeIntentKey(intent)
+		reason = strings.TrimSpace(reason)
+		k := groupKey{IntentKey: intentKey, Reason: reason}
+		current, ok := groups[k]
+		if !ok {
+			current = agg{cluster: CapabilityGapCluster{
+				IntentKey:    intentKey,
+				SampleIntent: strings.TrimSpace(intent),
+				Reason:       reason,
+				Count:        0,
+				LastSeenAt:   createdAt,
+			}}
+		}
+		current.cluster.Count++
+		if createdAt.After(current.cluster.LastSeenAt) {
+			current.cluster.LastSeenAt = createdAt
+		}
+		if current.cluster.SampleIntent == "" {
+			current.cluster.SampleIntent = strings.TrimSpace(intent)
+		}
+		groups[k] = current
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	out := make([]CapabilityGapCluster, 0, len(groups))
+	for _, v := range groups {
+		out = append(out, v.cluster)
+	}
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].Count == out[j].Count {
+			return out[i].LastSeenAt.After(out[j].LastSeenAt)
+		}
+		return out[i].Count > out[j].Count
+	})
+	if len(out) > limit {
+		out = out[:limit]
+	}
+	return out, nil
+}
+
+func normalizeIntentKey(intent string) string {
+	intent = strings.ToLower(strings.TrimSpace(intent))
+	if intent == "" {
+		return "empty"
+	}
+	intent = strings.ReplaceAll(intent, " ", "")
+	intent = strings.ReplaceAll(intent, "\t", "")
+	intent = strings.ReplaceAll(intent, "\n", "")
+	intent = strings.ReplaceAll(intent, "\r", "")
+	b := strings.Builder{}
+	for _, r := range intent {
+		if (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') || (r >= 0x4e00 && r <= 0x9fff) {
+			b.WriteRune(r)
+		}
+	}
+	normalized := b.String()
+	if normalized == "" {
+		return "empty"
+	}
+	runes := []rune(normalized)
+	if len(runes) > 80 {
+		normalized = string(runes[:80])
+	}
+	return normalized
+}
+
 func (s *SQLiteStore) migrate() error {
 	stmt := `
 	CREATE TABLE IF NOT EXISTS messages (
@@ -121,6 +271,15 @@ func (s *SQLiteStore) migrate() error {
 		created_at TIMESTAMP NOT NULL
 	);
 	CREATE INDEX IF NOT EXISTS idx_messages_chat_id_id ON messages(chat_id, id);
+	CREATE TABLE IF NOT EXISTS capability_gaps (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		chat_id TEXT NOT NULL,
+		user_id TEXT NOT NULL,
+		intent TEXT NOT NULL,
+		reason TEXT NOT NULL,
+		created_at TIMESTAMP NOT NULL
+	);
+	CREATE INDEX IF NOT EXISTS idx_capability_gaps_created_at ON capability_gaps(created_at);
 	`
 	if _, err := s.db.Exec(stmt); err != nil {
 		return fmt.Errorf("migrate schema: %w", err)