fix(app): accept inline skill autocomplete (#1464)

packages/app/src/hooks/use-agent-autocomplete.ts

@@ -450,9 +450,7 @@ export function useAgentAutocomplete(input: UseAgentAutocompleteInput): AgentAut
           command: activeSlashCommand,
           commandName: selected.id,
         });
-        const shouldAppendSpace =
-          activeSlashCommand.position === "start" && activeSlashCommand.end === userInput.length;
-        setUserInput(shouldAppendSpace ? `${nextInput} ` : nextInput);
+        setUserInput(nextInput);
         onAutocompleteApplied?.();
         return;
       }

packages/app/src/utils/agent-command-autocomplete.test.ts

@@ -95,6 +95,30 @@ describe("applySlashCommandReplacement", () => {
       }),
     ).toBe("use /taste before implementation");
   });
+
+  it("commits an inline slash token at the prompt tail", () => {
+    const text = "use /tas";
+
+    expect(
+      applySlashCommandReplacement({
+        text,
+        command: { start: 4, end: text.length, query: "tas", position: "inline" },
+        commandName: "taste",
+      }),
+    ).toBe("use /taste ");
+  });
+
+  it("commits a start slash token at the prompt tail", () => {
+    const text = "/tas";
+
+    expect(
+      applySlashCommandReplacement({
+        text,
+        command: { start: 0, end: text.length, query: "tas", position: "start" },
+        commandName: "taste",
+      }),
+    ).toBe("/taste ");
+  });
 });
 
 describe("filterInlineSkillCommandEntries", () => {

packages/app/src/utils/agent-command-autocomplete.ts

@@ -115,5 +115,6 @@ export function findActiveSlashCommand(
 export function applySlashCommandReplacement(input: ApplySlashCommandReplacementInput): string {
   const before = input.text.slice(0, input.command.start);
   const after = input.text.slice(input.command.end);
-  return `${before}/${input.commandName}${after}`;
+  const replacement = `${before}/${input.commandName}${after}`;
+  return input.command.end === input.text.length ? `${replacement} ` : replacement;
 }