diff --git a/nix/opencode/plugins/github-agents.js b/nix/opencode/plugins/github-agents.js
index fac06b4..7d9fb63 100644
--- a/nix/opencode/plugins/github-agents.js
+++ b/nix/opencode/plugins/github-agents.js
@@ -268,13 +268,16 @@ async function fetchValidModelIds(client, providerId) {
 }
 
 function toAgent(data, body, fallbackName) {
-  const rawName = data.name || fallbackName
-  const name = slugify(rawName)
+  // Name comes from the FILENAME (planner.agent.md -> "planner"), not the
+  // frontmatter `name:` — Copilot files tend to use a short filename and a
+  // long descriptive `name:`, and the filename is the nicer @mention handle.
+  const name = slugify(fallbackName)
   if (!name) return null
   const agent = {
     description:
       (data.description && String(data.description)) ||
-      `GitHub Copilot agent "${rawName}"`,
+      (data.name && `GitHub Copilot agent "${data.name}"`) ||
+      `GitHub Copilot agent "${fallbackName}"`,
     mode: DEFAULT_MODE,
     prompt: body.trim(),
   }