feat: add /config chat config updates

src/auto-reply/reply/config-commands.ts

@@ -0,0 +1,62 @@
+import { parseConfigValue } from "./config-value.js";
+
+export type ConfigCommand =
+  | { action: "show"; path?: string }
+  | { action: "set"; path: string; value: unknown }
+  | { action: "unset"; path: string }
+  | { action: "error"; message: string };
+
+export function parseConfigCommand(raw: string): ConfigCommand | null {
+  const trimmed = raw.trim();
+  if (!trimmed.toLowerCase().startsWith("/config")) return null;
+  const rest = trimmed.slice("/config".length).trim();
+  if (!rest) return { action: "show" };
+
+  const match = rest.match(/^(\S+)(?:\s+([\s\S]+))?$/);
+  if (!match) return { action: "error", message: "Invalid /config syntax." };
+  const action = match[1].toLowerCase();
+  const args = (match[2] ?? "").trim();
+
+  switch (action) {
+    case "show":
+      return { action: "show", path: args || undefined };
+    case "unset": {
+      if (!args)
+        return { action: "error", message: "Usage: /config unset path" };
+      return { action: "unset", path: args };
+    }
+    case "set": {
+      if (!args) {
+        return {
+          action: "error",
+          message: "Usage: /config set path=value",
+        };
+      }
+      const eqIndex = args.indexOf("=");
+      if (eqIndex <= 0) {
+        return {
+          action: "error",
+          message: "Usage: /config set path=value",
+        };
+      }
+      const path = args.slice(0, eqIndex).trim();
+      const rawValue = args.slice(eqIndex + 1);
+      if (!path) {
+        return {
+          action: "error",
+          message: "Usage: /config set path=value",
+        };
+      }
+      const parsed = parseConfigValue(rawValue);
+      if (parsed.error) {
+        return { action: "error", message: parsed.error };
+      }
+      return { action: "set", path, value: parsed.value };
+    }
+    default:
+      return {
+        action: "error",
+        message: "Usage: /config show|set|unset",
+      };
+  }
+}