refactor(tools): decompose skill/tools.ts into focused tool creators

src/tools/skill/skill-body.ts

@@ -0,0 +1,26 @@
+import type { LoadedSkill } from "../../features/opencode-skill-loader"
+import { extractSkillTemplate } from "../../features/opencode-skill-loader/skill-content"
+
+const SKILL_INSTRUCTION_PATTERN = /<skill-instruction>([\s\S]*?)<\/skill-instruction>/
+
+function trimSkillInstruction(template: string): string {
+  const templateMatch = template.match(SKILL_INSTRUCTION_PATTERN)
+  return templateMatch ? templateMatch[1].trim() : template
+}
+
+export async function extractSkillBody(skill: LoadedSkill): Promise<string> {
+  if (skill.lazyContent) {
+    const fullTemplate = await skill.lazyContent.load()
+    return trimSkillInstruction(fullTemplate)
+  }
+
+  if (skill.scope === "config" && skill.definition.template) {
+    return trimSkillInstruction(skill.definition.template)
+  }
+
+  if (skill.path) {
+    return extractSkillTemplate(skill)
+  }
+
+  return trimSkillInstruction(skill.definition.template || "")
+}