Skills real projects publish on GitHub, most starred first. Each one says what it will make an agent do before you copy it.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-email-deliverability-advisor/SKILL.md
Deliverability advisor for the Twilio Email API specifically. Use ONLY when the developer explicitly mentions Twilio Email, comms.twilio.com, or a Twilio (non-SendGrid) email program. For all other deliverability questions — including generic ones — use twilio-sendgrid-deliverability-advisor.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-email-send/SKILL.md
Use when the caller has Twilio credentials (Account SID + Auth Token or API Key SID + Secret) and needs to send email via comms.twilio.com/v1/Emails. This is Twilio-native email — NOT SendGrid. Do NOT use if the caller has a SendGrid API key (SG.-prefix) — use twilio-sendgrid-email-send instead. Covers single sends, batch sends up to 10,000 recipients, Liquid personalization, operation tracking, and error handling.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-identity-verification-advisor/SKILL.md
Planning skill for identity verification and fraud prevention. Qualifies the developer's needs across authentication method, channel selection, fraud risk level, and user experience to recommend the right Twilio Verify + Lookup architecture. Handles login, signup, password reset, and risk-adaptive verification.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-marketing-promotions-advisor/SKILL.md
Planning skill for marketing and promotional messaging. Qualifies the developer's campaign needs across channel selection, compliance, audience segmentation, and delivery tracking to recommend the right Twilio messaging architecture. Handles both "set up a promotional SMS campaign" and "build a multi-channel engagement pipeline with Segment integration."
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-messaging-channel-advisor/SKILL.md
Planning skill that helps the developer pick the right Twilio messaging channel — SMS, MMS, RCS, or WhatsApp — for a given use case. Qualifies intent across content type, geography, use case (marketing / notifications / OTP / support), cost model, and brand presence. Use when the developer asks "which channel should I use", "SMS vs RCS vs WhatsApp", mentions a country or region, asks about branded messaging, rich content, or fallback — and proactively when the developer says "send SMS" but their use case (rich content, international reach, branded experience) would benefit from a different channel.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-notifications-alerts-advisor/SKILL.md
Planning skill for transactional notifications, alerts, and reminders. Qualifies the developer's needs across urgency, channel selection, delivery confirmation, and fallback patterns to recommend the right Twilio notification architecture. Handles both "send shipping updates to customers" and "build a multi-channel alert system with delivery confirmation and fallback."
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-numbers-senders/SKILL.md
Choose the right Twilio number type and sender BEFORE building. Covers phone numbers (local, toll-free, short code, mobile), alphanumeric sender IDs, WhatsApp senders, RCS agents, international availability, and regulatory bundles. Each number type has its own compliance program — choosing wrong means rebuilding. Use this skill first.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-organizations-setup/SKILL.md
Set up and manage Twilio Organizations for centralized account and user governance. Covers the Organization > Account > Subaccount hierarchy, roles (Owner/Admin/Standard), managed vs independent accounts, domain registration, SSO enforcement, SCIM provisioning, and Organization merging. Use this skill when managing multiple Twilio accounts or users across teams.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-regulatory-compliance-bundles/SKILL.md
Manage regulatory compliance for international phone numbers. Covers what bundles are, which countries require them, how to create End-Users and Supporting Documents, evaluate and submit bundles, fix evaluation failures, update bundles when regulations change, and ISV multi-account patterns. Use this skill when provisioning numbers outside the US.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-reliability-patterns/SKILL.md
Handle rate limits, retries, and failures when building on Twilio at scale. Covers 429 exponential backoff with jitter, per-number throughput limits, StatusCallback resilience, thin-receiver pattern, and fallback chains. Use this skill whenever sending messages or making calls at volume, or when building production-grade Twilio integrations.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-security-compliance-hipaa/SKILL.md
Configure Twilio accounts for HIPAA compliance. Covers BAA requirements, HIPAA Project designation (self-service and support), eligible services list, per-product requirements (Voice, SMS, ConversationRelay, Conversation Intelligence, Flex, Verify), message redaction, and what is NOT eligible. Use this skill when developers are building healthcare workflows on Twilio.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-sendgrid-deliverability-advisor/SKILL.md
Diagnostic and advisory skill for email deliverability problems. Use when a developer asks why emails are going to spam, not reaching the inbox, getting blocked, bouncing, or how to improve sender reputation — with or without a specified platform. Covers SendGrid-specific tooling: SPF, DKIM, DMARC, BIMI, IP warmup, list hygiene, bounce/spam rate thresholds, and Engagement Quality Score (SEQ). Do NOT use for Twilio Email (comms.twilio.com / Account SID + Auth Token) — use twilio-email-deliverability-advisor instead. Do NOT use for general email sending questions — use twilio-sendgrid-email-send (SendGrid) or twilio-email-deliverability-advisor instead.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-sendgrid-email-settings/SKILL.md
Configure SendGrid dynamic templates (Handlebars), tracking settings (opens, clicks, subscriptions), link branding for custom tracking domains, and content types (HTML, plain text, AMP). Use when customizing SendGrid email content, tracking behavior, or branded links. Requires a SendGrid API key (SG.-prefix) — not applicable to the Twilio Email API (comms.twilio.com).
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-sendgrid-inbound-parse/SKILL.md
Receive inbound email via SendGrid Inbound Parse webhook. Covers MX record setup, parsed vs raw mode, handling attachments, and common pitfalls. Use when building email-to-app workflows like support ticket creation or email processing pipelines. Requires a SendGrid API key (SG.-prefix) — not applicable to the Twilio Email API (comms.twilio.com).
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-sendgrid-webhooks/SKILL.md
Track email delivery and engagement via SendGrid Event Webhooks. Covers all 11 event types (delivery + engagement), webhook handler implementation, ECDSA signature verification, batched event processing, and common debugging patterns. Use when building SendGrid delivery tracking, engagement analytics, or bounce handling. Requires a SendGrid API key (SG.-prefix) — not applicable to the Twilio Email API (comms.twilio.com).
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-sms-isv-setup/SKILL.md
Best practices for ISVs (Independent Software Vendors) building SMS features into multi-tenant SaaS platforms using Twilio. Covers customer onboarding for A2P and toll-free compliance, subaccount architecture, sender management, billing patterns, and common ISV pitfalls. Use this when building SMS capabilities that your customers will use to message their end users.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-voice-conversation-relay/SKILL.md
Build AI-powered voice agents using Twilio ConversationRelay. Handles real-time speech recognition (ASR), text-to-speech (TTS), and bidirectional audio streaming via WebSocket. Covers TwiML setup, WebSocket message types, LLM integration, streaming responses, and voice provider configuration. Use this skill to build voice bots, IVR replacements, or real-time AI voice assistants on Twilio calls.
OpenAISkillopenai/plugins/plugins/twilio-developer-kit/skills/twilio-voice-twiml/SKILL.md
Build voice call logic using TwiML (Twilio Markup Language). Covers the core verbs (Say, Play, Gather, Dial, Record, Conference), generating TwiML with Python and Node.js SDKs, and a complete inbound call IVR example. Use this skill to define call behavior for inbound or outbound calls.
OpenAISkillopenai/plugins/plugins/vercel/skills/agent-browser/SKILL.md
Browser automation CLI for AI agents. Use when the user needs to interact with websites, verify dev server output, test web apps, navigate pages, fill forms, click buttons, take screenshots, extract data, or automate any browser task. Also triggers when a dev server starts so you can verify it visually.
OpenAISkillopenai/plugins/plugins/vercel/skills/agent-browser-verify/SKILL.md
Automated browser verification for dev servers. Triggers when a dev server starts to run a visual gut-check with agent-browser — verifies the page loads, checks for console errors, validates key UI elements, and reports pass/fail before continuing.
A folder with a SKILL.md file: a name, a description of when to use it, and instructions. Claude loads a skill only when the task matches its description.
Copy the folder into your project's .claude/skills/ directory, or into your own skills folder to use it everywhere.
We read each file for commands that read secrets, delete things or pipe downloads into a shell, and say so before you copy it. No warning is not a promise that a file is safe.
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