From f173a0a77570605ae5d930066d629b554c11cea3 Mon Sep 17 00:00:00 2001
From: Brice Ruth <bruth@flexion.us>
Date: Sun, 29 Mar 2026 13:31:47 -0500
Subject: [PATCH] fix: hide skill prompt text from chat UI

Mark the skill template TextPart as synthetic so the full prompt is
sent to the model but hidden from the user. Add a short ignored
summary part ('Running skill: <command>') so the user still sees
confirmation that the skill was loaded.
---
 packages/opencode/src/session/prompt.ts | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/src/session/prompt.ts b/packages/opencode/src/session/prompt.ts
index acc9f635953c..598824081a31 100644
--- a/packages/opencode/src/session/prompt.ts
+++ b/packages/opencode/src/session/prompt.ts
@@ -193,6 +193,7 @@ export namespace SessionPrompt {
       {
         type: "text",
         text: template,
+        synthetic: true,
       },
     ]
     const files = ConfigMarkdown.files(template)
@@ -1941,7 +1942,15 @@ NOTE: At any point in time through this workflow you should feel free to ask the
             prompt: templateParts.find((y) => y.type === "text")?.text ?? "",
           },
         ]
-      : [...templateParts, ...(input.parts ?? [])]
+      : [
+          ...templateParts,
+          {
+            type: "text" as const,
+            text: `Running skill: ${input.command}`,
+            ignored: true,
+          },
+          ...(input.parts ?? []),
+        ]
 
     const userAgent = isSubtask ? (input.agent ?? (await Agent.defaultAgent())) : agentName
     const userModel = isSubtask