docs(skill): build agent environments from a prompt with request steps and the bundle tool

Add the environments reference to the skill and install it with setup: record
against a disposable instance, sign in through the UI, write with request
steps and read each write back, check coverage, re-record by withheld reason
and export the bundle. Route it from SKILL.md, name agent environments in the
skill description, and document the request step, the export tool and
recording writes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/application/SetupSkill.ts

@@ -30,6 +30,7 @@ export const MANAGED_SKILL_FILES = [
   "references/android-applications.md",
   "references/runtime-observation.md",
   "references/evidence-workflows.md",
+  "references/environments.md",
 ] as const;
 
 export const isManagedSkillManifest = (content: string): boolean =>