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Gmail add-on and CardService specialist for Google Apps Script. Operates in 3 modes: code review, plan review, and advisory/Q&A. **AUTOMATICALLY INVOKE** when: - Code contains CardService API calls (newCardBuilder, newCardSection, newTextButton, etc.) - Gmail add-on patterns detected (buildContextualCard, homepageTrigger, setCurrentMessageAccessToken) - User mentions "Gmail add-on", "card UI", "Gmail sidebar", "contextual trigger" - Code contains GmailApp + CardService combination - Reviewing .gs files with appsscript.json gmail addon configuration - User asks Gmail add-on questions ("how should I...", "what's the best way...") - Plan/architecture discussions for Gmail add-ons **Pattern Detection (triggers review):** - CardService.newCardBuilder(), .addCard(), .buildHomepageCard() - GmailApp.setCurrentMessageAccessToken(), .getMessageById(), .createDraftReply() - Action handlers: setOnClickAction, setOnChangeAction, buildContextualCard - Navigation: pushCard(), popCard(), updateCard(), popToRoot() - e.gmail.accessToken, e.gmail.messageId, e.commonEventObject **Modes:** - Code Review: Validate existing CardService implementations (6-phase validation) - Plan Review: Evaluate Gmail add-on architecture and design before implementation - Advisory: Answer questions, suggest patterns, compare approaches **Works with**: gas-code-review (for .gs validation), gas-review (unified orchestrator) **NOT for**: HtmlService UIs (use gas-ui-review), Sheets-only GAS (use gas-code-review), Calendar/Drive/Docs add-ons (covered by gas-code-review)
How this skill is triggered — by the user, by Claude, or both
Slash command
/gas-suite:gas-gmail-cardsclaude-sonnet-4-6This skill is limited to the following tools:
The summary Claude sees in its skill listing — used to decide when to auto-load this skill
This skill invokes the `gas-gmail-cards` agent for Gmail add-on code review, plan review, and advisory.
This skill invokes the gas-gmail-cards agent for Gmail add-on code review, plan review, and advisory.
Code Review:
/gas-gmail-cards review this CardService code
/gas-gmail-cards check ContextualCard.gs
Plan Review:
/gas-gmail-cards review this implementation plan
/gas-gmail-cards evaluate this add-on architecture
Advisory / Q&A:
/gas-gmail-cards how should I handle async LLM calls?
/gas-gmail-cards compare CacheService vs PropertiesService for chat
/gas-gmail-cards what's the best navigation pattern for a chat interface?
Auto-invokes when CardService patterns or Gmail add-on questions detected.
When invoked, spawn the gas-gmail-cards agent:
Task(
subagent_type="gas-gmail-cards",
description="Gmail add-on assistance",
prompt="[user's request - code, plan, or question]"
)
The agent automatically detects mode and responds appropriately:
npx claudepluginhub whichguy/claude-craft --plugin gas-suiteProvides a checklist for code reviews covering functionality, security, performance, maintainability, tests, and quality. Use for pull requests, audits, team standards, and developer training.