Prevent endless loops during connectivity issues.

cmd/hooks/post-tool-use/main.go

@@ -17,11 +17,50 @@ type Input struct {
 	ToolUseID    string      `json:"tool_use_id"`
 }
 
+// skipTools lists tools that never produce useful observations.
+// Skip the HTTP call entirely for these to reduce overhead during heavy tool usage.
+var skipTools = map[string]bool{
+	// Internal tracking tools (but NOT TodoWrite - it captures planned work)
+	"Task":       true,
+	"TaskOutput": true,
+
+	// File discovery tools (just listings, no insights)
+	"Glob":      true,
+	"ListDir":   true,
+	"LS":        true,
+	"KillShell": true,
+
+	// Question/interaction tools (no code insights)
+	"AskUserQuestion": true,
+
+	// Plan mode tools (planning, not execution)
+	"EnterPlanMode": true,
+	"ExitPlanMode":  true,
+
+	// Skill/command execution (meta-operations)
+	"Skill":        true,
+	"SlashCommand": true,
+
+	// Read is high-volume and rarely produces insights worth the overhead
+	// The processor would skip most reads anyway after filtering
+	"Read": true,
+
+	// Search tools are for finding, not modifying
+	"Grep":      true,
+	"WebSearch": true,
+}
+
 func main() {
 	hooks.RunHook("PostToolUse", handlePostToolUse)
 }
 
 func handlePostToolUse(ctx *hooks.HookContext, input *Input) (string, error) {
+	// Skip HTTP call entirely for tools that never produce useful observations.
+	// This significantly reduces overhead during heavy tool usage.
+	if skipTools[input.ToolName] {
+		return "", nil
+	}
+
 	fmt.Fprintf(os.Stderr, "[post-tool-use] %s\n", input.ToolName)
 
 	// Send observation to worker

internal/db/sqlite/migrations.go

@@ -272,6 +272,17 @@ var Migrations = []Migration{
 			);
 		`,
 	},
+	{
+		Version: 18,
+		Name:    "user_prompts_unique_constraint",
+		SQL: `
+			-- Add unique constraint to prevent duplicate prompts
+			-- This fixes a bug where the user-prompt hook could fire multiple times
+			-- creating duplicate prompt records with incrementing numbers
+			CREATE UNIQUE INDEX IF NOT EXISTS idx_user_prompts_session_number_unique
+			ON user_prompts(claude_session_id, prompt_number);
+		`,
+	},
 }
 
 // MigrationManager handles database schema migrations.

internal/db/sqlite/prompt.go

@@ -32,11 +32,15 @@ func (s *PromptStore) SetCleanupFunc(fn PromptCleanupFunc) {
 }
 
 // SaveUserPromptWithMatches saves a user prompt with matched observation count.
+// Uses INSERT OR IGNORE to be idempotent - duplicate (session, prompt_number) pairs are silently ignored.
+// This prevents duplicate prompts when the user-prompt hook fires multiple times.
 func (s *PromptStore) SaveUserPromptWithMatches(ctx context.Context, claudeSessionID string, promptNumber int, promptText string, matchedObservations int) (int64, error) {
 	now := time.Now()
 
+	// Use INSERT OR IGNORE for idempotency - if (claude_session_id, prompt_number) already exists,
+	// the insert is silently ignored. This handles concurrent/duplicate hook invocations.
 	const query = `
-		INSERT INTO user_prompts
+		INSERT OR IGNORE INTO user_prompts
 		(claude_session_id, prompt_number, prompt_text, matched_observations, created_at, created_at_epoch)
 		VALUES (?, ?, ?, ?, ?, ?)
 	`
@@ -51,6 +55,17 @@ func (s *PromptStore) SaveUserPromptWithMatches(ctx context.Context, claudeSessi
 
 	id, _ := result.LastInsertId()
 
+	// If id is 0, the insert was ignored (duplicate) - fetch the existing ID
+	if id == 0 {
+		const selectQuery = `SELECT id FROM user_prompts WHERE claude_session_id = ? AND prompt_number = ?`
+		row := s.store.QueryRowContext(ctx, selectQuery, claudeSessionID, promptNumber)
+		if err := row.Scan(&id); err != nil {
+			return 0, err
+		}
+		// Return existing ID without triggering cleanup (already handled when first inserted)
+		return id, nil
+	}
+
 	// Cleanup old prompts beyond the global limit (async to not block handler)
 	go func() {
 		cleanupCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
@@ -184,6 +199,31 @@ func (s *PromptStore) GetAllRecentUserPrompts(ctx context.Context, limit int) ([
 	return scanPromptWithSessionRows(rows)
 }
 
+// FindRecentPromptByText finds a prompt with the same text for a session within the last few seconds.
+// This is used to detect duplicate hook invocations.
+// Returns (promptID, promptNumber, found).
+func (s *PromptStore) FindRecentPromptByText(ctx context.Context, claudeSessionID, promptText string, withinSeconds int) (int64, int, bool) {
+	// Look for an existing prompt with the same text within the time window
+	// This catches duplicate hook invocations that happen in quick succession
+	const query = `
+		SELECT id, prompt_number FROM user_prompts
+		WHERE claude_session_id = ? AND prompt_text = ?
+		AND created_at_epoch > ?
+		ORDER BY created_at_epoch DESC
+		LIMIT 1
+	`
+
+	cutoff := time.Now().Add(-time.Duration(withinSeconds) * time.Second).UnixMilli()
+
+	var id int64
+	var promptNumber int
+	err := s.store.QueryRowContext(ctx, query, claudeSessionID, promptText, cutoff).Scan(&id, &promptNumber)
+	if err != nil {
+		return 0, 0, false
+	}
+	return id, promptNumber, true
+}
+
 // GetRecentUserPromptsByProject retrieves recent user prompts for a specific project.
 func (s *PromptStore) GetRecentUserPromptsByProject(ctx context.Context, project string, limit int) ([]*models.UserPromptWithSession, error) {
 	const query = `

internal/update/update.go

@@ -49,22 +49,36 @@ type Asset struct {
 
 // UpdateInfo contains information about an available update.
 type UpdateInfo struct {
-	Available      bool      `json:"available"`
+	Available           bool      `json:"available"`
-	CurrentVersion string    `json:"current_version"`
+	CurrentVersion      string    `json:"current_version"`
-	LatestVersion  string    `json:"latest_version"`
+	LatestVersion       string    `json:"latest_version"`
-	ReleaseNotes   string    `json:"release_notes,omitempty"`
+	ReleaseNotes        string    `json:"release_notes,omitempty"`
-	PublishedAt    time.Time `json:"published_at,omitempty"`
+	PublishedAt         time.Time `json:"published_at,omitempty"`
-	DownloadURL    string    `json:"download_url,omitempty"`
+	DownloadURL         string    `json:"download_url,omitempty"`
-	ChecksumsURL   string    `json:"checksums_url,omitempty"`
+	ChecksumsURL        string    `json:"checksums_url,omitempty"`
-	BundleURL      string    `json:"bundle_url,omitempty"` // Sigstore bundle (.sigstore.json)
+	BundleURL           string    `json:"bundle_url,omitempty"` // Sigstore bundle (.sigstore.json)
+	ManualUpdateCommand string    `json:"manual_update_command,omitempty"`
+}
+
+// InstallScriptURL is the URL to the remote installation script.
+const InstallScriptURL = "https://raw.githubusercontent.com/" + GitHubRepo + "/main/scripts/install.sh"
+
+// GetManualUpdateCommand returns the curl command for manual update.
+// If version is empty, it installs the latest version.
+func GetManualUpdateCommand(version string) string {
+	if version == "" {
+		return fmt.Sprintf("curl -sSL %s | bash", InstallScriptURL)
+	}
+	return fmt.Sprintf("curl -sSL %s | bash -s -- %s", InstallScriptURL, version)
 }
 
 // UpdateStatus represents the current update status.
 type UpdateStatus struct {
-	State    string  `json:"state"` // "idle", "checking", "downloading", "verifying", "applying", "done", "error"
+	State               string  `json:"state"` // "idle", "checking", "downloading", "verifying", "applying", "done", "error"
-	Progress float64 `json:"progress"`
+	Progress            float64 `json:"progress"`
-	Message  string  `json:"message"`
+	Message             string  `json:"message"`
-	Error    string  `json:"error,omitempty"`
+	Error               string  `json:"error,omitempty"`
+	ManualUpdateCommand string  `json:"manual_update_command,omitempty"` // Shown when update fails
 }
 
 // Updater handles self-updates.
@@ -112,9 +126,10 @@ func (u *Updater) setError(err error) {
 	u.mu.Lock()
 	defer u.mu.Unlock()
 	u.status = UpdateStatus{
-		State:   "error",
+		State:               "error",
-		Message: "Update failed",
+		Message:             "Update failed",
-		Error:   err.Error(),
+		Error:               err.Error(),
+		ManualUpdateCommand: GetManualUpdateCommand(""), // Always provide fallback command
 	}
 }
 
@@ -169,6 +184,9 @@ func (u *Updater) CheckForUpdate(ctx context.Context) (*UpdateInfo, error) {
 	// Compare versions
 	info.Available = isNewerVersion(info.LatestVersion, u.currentVersion)
 
+	// Always include manual update command as an alternative option
+	info.ManualUpdateCommand = GetManualUpdateCommand("v" + info.LatestVersion)
+
 	if info.Available {
 		// Find download URLs for current platform
 		platform := getPlatform()

internal/worker/handlers.go

@@ -159,7 +159,13 @@ type SessionInitResponse struct {
 	Reason       string `json:"reason,omitempty"`
 }
 
+// DuplicatePromptWindowSeconds is the time window for detecting duplicate prompt submissions.
+// If the same prompt text is seen within this window, it's considered a duplicate hook invocation.
+const DuplicatePromptWindowSeconds = 10
+
 // handleSessionInit handles session initialization from user-prompt hook.
+// This handler is idempotent - duplicate requests within a short time window
+// return the existing prompt data without creating duplicates.
 func (s *Service) handleSessionInit(w http.ResponseWriter, r *http.Request) {
 	var req SessionInitRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
@@ -182,8 +188,31 @@ func (s *Service) handleSessionInit(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Clean prompt and create session
+	// Clean prompt
 	cleanedPrompt := privacy.Clean(req.Prompt)
+
+	// DUPLICATE DETECTION: Check if this exact prompt was already saved recently.
+	// This prevents the bug where the hook fires multiple times for the same user action,
+	// creating many duplicate prompts with incrementing numbers.
+	if existingID, existingNum, found := s.promptStore.FindRecentPromptByText(r.Context(), req.ClaudeSessionID, cleanedPrompt, DuplicatePromptWindowSeconds); found {
+		// Get or create session (idempotent)
+		sessionID, _ := s.sessionStore.CreateSDKSession(r.Context(), req.ClaudeSessionID, req.Project, cleanedPrompt)
+
+		log.Debug().
+			Int64("sessionId", sessionID).
+			Int("promptNumber", existingNum).
+			Int64("promptId", existingID).
+			Msg("Duplicate prompt detected - returning existing")
+
+		// Return existing prompt data without incrementing or saving again
+		writeJSON(w, SessionInitResponse{
+			SessionDBID:  sessionID,
+			PromptNumber: existingNum,
+		})
+		return
+	}
+
+	// Create session (idempotent)
 	sessionID, err := s.sessionStore.CreateSDKSession(r.Context(), req.ClaudeSessionID, req.Project, cleanedPrompt)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)

ui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "claude-mnemonic-dashboard",
-  "version": "v0.6.8-2-g378e7dc-dirty",
+  "version": "v0.6.11-2-g8ff0873-dirty",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "claude-mnemonic-dashboard",
-      "version": "v0.6.8-2-g378e7dc-dirty",
+      "version": "v0.6.11-2-g8ff0873-dirty",
       "dependencies": {
         "vue": "^3.5.13"
       },

ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-mnemonic-dashboard",
-  "version": "v0.6.8-2-g378e7dc-dirty",
+  "version": "v0.6.11-2-g8ff0873-dirty",
   "private": true,
   "type": "module",
   "scripts": {