diff --git a/src/auto-reply/reply/session.test.ts b/src/auto-reply/reply/session.test.ts
index bdc2adbd0..dca2ae1c8 100644
--- a/src/auto-reply/reply/session.test.ts
+++ b/src/auto-reply/reply/session.test.ts
@@ -151,6 +151,34 @@ describe("initSessionState RawBody", () => {
     expect(result.bodyStripped).toBe("");
   });
 
+  it("preserves argument casing while still matching reset triggers case-insensitively", async () => {
+    const root = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-rawbody-reset-case-"));
+    const storePath = path.join(root, "sessions.json");
+
+    const cfg = {
+      session: {
+        store: storePath,
+        resetTriggers: ["/new"],
+      },
+    } as ClawdbotConfig;
+
+    const ctx = {
+      RawBody: "/NEW KeepThisCase",
+      ChatType: "direct",
+      SessionKey: "agent:main:whatsapp:dm:S1",
+    };
+
+    const result = await initSessionState({
+      ctx,
+      cfg,
+      commandAuthorized: true,
+    });
+
+    expect(result.isNewSession).toBe(true);
+    expect(result.bodyStripped).toBe("KeepThisCase");
+    expect(result.triggerBodyNormalized).toBe("/NEW KeepThisCase");
+  });
+
   it("falls back to Body when RawBody is undefined", async () => {
     const root = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-rawbody-fallback-"));
     const storePath = path.join(root, "sessions.json");
diff --git a/src/auto-reply/reply/session.ts b/src/auto-reply/reply/session.ts
index 412bbb285..add975d78 100644
--- a/src/auto-reply/reply/session.ts
+++ b/src/auto-reply/reply/session.ts
@@ -135,7 +135,10 @@ export async function initSessionState(params: {
   // Prefer CommandBody/RawBody (clean message) for command detection; fall back
   // to Body which may contain structural context (history, sender labels).
   const commandSource = ctx.BodyForCommands ?? ctx.CommandBody ?? ctx.RawBody ?? ctx.Body ?? "";
-  const triggerBodyNormalized = stripStructuralPrefixes(commandSource).trim().toLowerCase();
+  // IMPORTANT: do NOT lowercase the entire command body.
+  // Users often pass case-sensitive arguments (e.g. filesystem paths on Linux).
+  // Command parsing downstream lowercases only the command token for matching.
+  const triggerBodyNormalized = stripStructuralPrefixes(commandSource).trim();
 
   // Use CommandBody/RawBody for reset trigger matching (clean message without structural context).
   const rawBody = commandSource;
@@ -151,17 +154,27 @@ export async function initSessionState(params: {
   const strippedForReset = isGroup
     ? stripMentions(triggerBodyNormalized, ctx, cfg, agentId)
     : triggerBodyNormalized;
+
+  // Reset triggers are configured as lowercased commands (e.g. "/new"), but users may type
+  // "/NEW" etc. Match case-insensitively while keeping the original casing for any stripped body.
+  const trimmedBodyLower = trimmedBody.toLowerCase();
+  const strippedForResetLower = strippedForReset.toLowerCase();
+
   for (const trigger of resetTriggers) {
     if (!trigger) continue;
     if (!resetAuthorized) break;
-    if (trimmedBody === trigger || strippedForReset === trigger) {
+    const triggerLower = trigger.toLowerCase();
+    if (trimmedBodyLower === triggerLower || strippedForResetLower === triggerLower) {
       isNewSession = true;
       bodyStripped = "";
       resetTriggered = true;
       break;
     }
-    const triggerPrefix = `${trigger} `;
-    if (trimmedBody.startsWith(triggerPrefix) || strippedForReset.startsWith(triggerPrefix)) {
+    const triggerPrefixLower = `${triggerLower} `;
+    if (
+      trimmedBodyLower.startsWith(triggerPrefixLower) ||
+      strippedForResetLower.startsWith(triggerPrefixLower)
+    ) {
       isNewSession = true;
       bodyStripped = strippedForReset.slice(trigger.length).trimStart();
       resetTriggered = true;