examples/slack now starts a Slack bot and/or a Telegram bot from one platform-neutral app layer, env-conditional on which credentials are set. Neutralized Slack-specific rendering so the shared components work on both platforms: unicode glyphs instead of mrkdwn shortcodes, no Block Kit raw fallbacks, neutral context/tool wording. Migrated the Telegram e2e smoke harness and BotFather setup docs; removed the separate examples/telegram app.