Add memory system, dynamic tool loading, and fix logging issues

- Add MemoryStore for persistent long-term and daily notes
- Add dynamic tool summary generation in system prompt
- Fix YAML frontmatter parsing for nanobot skill format
- Add GetSummaries() method to ToolRegistry
- Fix DebugCF logging to use structured metadata
- Improve web_search and shell tool descriptions

pkg/tools/registry.go

@@ -101,3 +101,16 @@ func (r *ToolRegistry) Count() int {
 	defer r.mu.RUnlock()
 	return len(r.tools)
 }
+
+// GetSummaries returns human-readable summaries of all registered tools.
+// Returns a slice of "name - description" strings.
+func (r *ToolRegistry) GetSummaries() []string {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	summaries := make([]string, 0, len(r.tools))
+	for _, tool := range r.tools {
+		summaries = append(summaries, fmt.Sprintf("- `%s` - %s", tool.Name(), tool.Description()))
+	}
+	return summaries
+}

pkg/tools/shell.go

@@ -25,9 +25,9 @@ func NewExecTool(workingDir string) *ExecTool {
 		regexp.MustCompile(`\brm\s+-[rf]{1,2}\b`),
 		regexp.MustCompile(`\bdel\s+/[fq]\b`),
 		regexp.MustCompile(`\brmdir\s+/s\b`),
-		regexp.MustCompile(`\b(format|mkfs|diskpart)\b`),
+		regexp.MustCompile(`\b(format|mkfs|diskpart)\b\s`), // Match disk wiping commands (must be followed by space/args)
 		regexp.MustCompile(`\bdd\s+if=`),
-		regexp.MustCompile(`>\s*/dev/sd`),
+		regexp.MustCompile(`>\s*/dev/sd[a-z]\b`),            // Block writes to disk devices (but allow /dev/null)
 		regexp.MustCompile(`\b(shutdown|reboot|poweroff)\b`),
 		regexp.MustCompile(`:\(\)\s*\{.*\};\s*:`),
 	}

pkg/tools/web.go

@@ -36,7 +36,7 @@ func (t *WebSearchTool) Name() string {
 }
 
 func (t *WebSearchTool) Description() string {
-	return "Search the web. Returns titles, URLs, and snippets."
+	return "Search the web for current information. Returns titles, URLs, and snippets from search results."
 }
 
 func (t *WebSearchTool) Parameters() map[string]interface{} {