refactor(effect): move tool descriptions into registry (#21795)

packages/opencode/src/tool/skill.ts

@@ -1,4 +1,3 @@
-import { Effect } from "effect"
 import path from "path"
 import { pathToFileURL } from "url"
 import z from "zod"
@@ -98,23 +97,3 @@ export const SkillTool = Tool.define("skill", async () => {
     },
   }
 })
-
-export const SkillDescription: Tool.DynamicDescription = (agent) =>
-  Effect.gen(function* () {
-    const list = yield* Effect.promise(() => Skill.available(agent))
-    if (list.length === 0) return "No skills are currently available."
-    return [
-      "Load a specialized skill that provides domain-specific instructions and workflows.",
-      "",
-      "When you recognize that a task matches one of the available skills listed below, use this tool to load the full skill instructions.",
-      "",
-      "The skill will inject detailed instructions, workflows, and access to bundled resources (scripts, references, templates) into the conversation context.",
-      "",
-      'Tool output includes a `<skill_content name="...">` block with the loaded content.',
-      "",
-      "The following skills provide specialized sets of instructions for particular tasks",
-      "Invoke this tool to load a skill when a task matches one of the available skills listed below:",
-      "",
-      Skill.fmt(list, { verbose: false }),
-    ].join("\n")
-  })