fix(skill): allow missing descriptions (#26391)

packages/opencode/src/skill/index.ts

@@ -27,7 +27,7 @@ const SKILL_PATTERN = "**/SKILL.md"
 
 export const Info = Schema.Struct({
   name: Schema.String,
-  description: Schema.String,
+  description: Schema.optional(Schema.String),
   location: Schema.String,
   content: Schema.String,
 }).pipe(withStatics((s) => ({ zod: zod(s) })))
@@ -93,7 +93,7 @@ const add = Effect.fnUntraced(function* (state: State, match: string, bus: Bus.I
 
   if (!md) return
 
-  const parsed = z.object({ name: z.string(), description: z.string() }).safeParse(md.data)
+  const parsed = z.object({ name: z.string(), description: z.string().optional() }).safeParse(md.data)
   if (!parsed.success) return
 
   if (state.skills[parsed.data.name]) {
@@ -269,12 +269,13 @@ export const defaultLayer = layer.pipe(
 )
 
 export function fmt(list: Info[], opts: { verbose: boolean }) {
-  if (list.length === 0) return "No skills are currently available."
+  const described = list.filter((skill) => skill.description !== undefined)
+  if (described.length === 0) return "No skills are currently available."
   if (opts.verbose) {
     return [
       "<available_skills>",
-      ...list
-        .sort((a, b) => a.name.localeCompare(b.name))
+      ...described
+        .toSorted((a, b) => a.name.localeCompare(b.name))
         .flatMap((skill) => [
           "  <skill>",
           `    <name>${skill.name}</name>`,
@@ -288,7 +289,7 @@ export function fmt(list: Info[], opts: { verbose: boolean }) {
 
   return [
     "## Available Skills",
-    ...list
+    ...described
       .toSorted((a, b) => a.name.localeCompare(b.name))
       .map((skill) => `- **${skill.name}**: ${skill.description}`),
   ].join("\n")