feat: support config skill registration (#9640)

Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>

packages/opencode/src/skill/skill.ts

@@ -1,5 +1,6 @@
 import z from "zod"
 import path from "path"
+import os from "os"
 import { Config } from "../config/config"
 import { Instance } from "../project/instance"
 import { NamedError } from "@opencode-ai/util/error"
@@ -40,6 +41,7 @@ export namespace Skill {
 
   const OPENCODE_SKILL_GLOB = new Bun.Glob("{skill,skills}/**/SKILL.md")
   const CLAUDE_SKILL_GLOB = new Bun.Glob("skills/**/SKILL.md")
+  const SKILL_GLOB = new Bun.Glob("**/SKILL.md")
 
   export const state = Instance.state(async () => {
     const skills: Record<string, Info> = {}
@@ -122,6 +124,25 @@ export namespace Skill {
       }
     }
 
+    // Scan additional skill paths from config
+    const config = await Config.get()
+    for (const skillPath of config.skills?.paths ?? []) {
+      const expanded = skillPath.startsWith("~/") ? path.join(os.homedir(), skillPath.slice(2)) : skillPath
+      const resolved = path.isAbsolute(expanded) ? expanded : path.join(Instance.directory, expanded)
+      if (!(await Filesystem.isDir(resolved))) {
+        log.warn("skill path not found", { path: resolved })
+        continue
+      }
+      for await (const match of SKILL_GLOB.scan({
+        cwd: resolved,
+        absolute: true,
+        onlyFiles: true,
+        followSymlinks: true,
+      })) {
+        await addSkill(match)
+      }
+    }
+
     return skills
   })