diff --git a/src/commands/personality.ts b/src/commands/personality.ts
index bd7999e..a64da35 100644
--- a/src/commands/personality.ts
+++ b/src/commands/personality.ts
@@ -3,7 +3,10 @@ import { homedir } from "os";
 import { join } from "path";
 import { parse, stringify } from "yaml";
 
-const CONFIG_PATH = join(homedir(), ".hermes", "config.yaml");
+const HERMES_HOME = process.env.HERMES_HOME || join(homedir(), ".hermes");
+const CONFIG_PATH = join(HERMES_HOME, "config.yaml");
+const SOUL_PATH = join(HERMES_HOME, "SOUL.md");
+const CONVENTIONS_PATH = join(HERMES_HOME, "CONVENTIONS.md");
 
 interface Config {
   agent?: {
@@ -51,6 +54,21 @@ function getPreview(value: string | PersonalityDict): string {
   return value.description || (value.system_prompt || "").slice(0, 60) + "...";
 }
 
+// --- SOUL.md management ---
+
+function loadConventions(): string {
+  if (!existsSync(CONVENTIONS_PATH)) return "";
+  return readFileSync(CONVENTIONS_PATH, "utf-8").trim();
+}
+
+function writeSoulMd(personalityPrompt: string) {
+  const conventions = loadConventions();
+  const parts = [personalityPrompt];
+  if (conventions) parts.push(conventions);
+  const content = parts.filter(Boolean).join("\n\n");
+  writeFileSync(SOUL_PATH, content + "\n", "utf-8");
+}
+
 // --- Actions ---
 
 function list() {
@@ -126,7 +144,9 @@ function switchLocal(name: string) {
     if (!config.agent) config.agent = {};
     config.agent.system_prompt = "";
     saveConfig(config);
+    writeSoulMd("");
     console.log("Personality cleared.");
+    if (existsSync(CONVENTIONS_PATH)) console.log("SOUL.md updated (conventions only).");
     return;
   }
 
@@ -140,7 +160,9 @@ function switchLocal(name: string) {
   if (!config.agent) config.agent = {};
   config.agent.system_prompt = prompt;
   saveConfig(config);
+  writeSoulMd(prompt);
   console.log(`Switched to: ${name}`);
+  console.log("SOUL.md updated.");
 }
 
 async function switchTelegram(name: string) {