agent-email-inbox SKILL.md skillF
agent-email-inbox from asymmetric-al/core is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add asymmetric-al/core/agent-email-inbox@v4.1.0Pins v4.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- F, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- asymmetric-al/core
- Path
.agents/skills/agent-email-inbox/SKILL.md- Versions recorded
- 4
- Latest version
- v4.1.0, committed Oct 22, 2026
- First version recorded
- May 26, 2026
- Size
- 23,375 bytes
- Repository stars
- 370
- License
- AGPL-3.0
Use when building any system where email content triggers actions — AI agent inboxes, automated support handlers, email-to-task pipelines, or any workflow processing untrusted inbound email. Always use this skill when the user wants to receive emails and act on them programmatically, even if they don't mention "agent" — the skill contains critical security patterns (sender allowlists, content filtering, sandboxed processing) that prevent untrusted email from controlling your system.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# AI Agent Email Inbox ## Overview This skill covers setting up a secure email inbox that allows your application or AI agent to receive and respond to emails, with content safety measures in place. **Core principle:** An AI agent's inbox receives untrusted input. Security configuration is important to handle this safely. The skill builds the agent on a Resend **Inbox**. An inbox groups email into threads, and your agent replies inside the thread with one call. Resend sets the recipients and the threading headers. If the user has no custom domain, or their plan has no inbox available, use [Receiving without an inbox](#receiving-without-an-inbox) instead. The security levels are the same for both. ### Why Webhook-Based Receiving? Resend uses webhooks for inbound email, meaning your agent is notified **instantly** when an email arrives. This is valuable for agents because: - **Real-time responsiveness** — React to emails within seconds, not minutes - **No polling overhead** — No cron jobs checking "any new mail?" repeatedly - **Event-driven architecture** — Your agent only wakes up when there's actually something to process …
Read the whole file at its exact version.
How to install
mdr add asymmetric-al/core/agent-email-inbox@sha256:c6d71054fc076f4bThe line at the top of this page pins the label v4.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yvhuiw72tpx4pshm)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between May 26, 2026 and Oct 22, 2026, about one every 50 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v4.1.0 latest | 2026-10-22 | 752a38b | 23,375 B | F | view · diff |
| v3.0.4 | 2026-10-01 | 4ae104e | 16,529 B | F | view · diff |
| v3.0.4 | 2026-09-23 | 15c9348 | 16,523 B | F | view · diff |
| v3.0.2 | 2026-05-26 | 54acd2a | 16,300 B | F | view |
Audit of the latest version
- FAIL, critical: No instruction to send local credentials anywhere (matched: send = new Resend(process.env)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (23375 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
asymmetric-al/core · 370 stars · license AGPL-3.0 · pushed 2026-11-06 · branch develop
API
GET https://markdownregistry.com/api/v1/artifacts/art_yvhuiw72tpx4pshm GET https://markdownregistry.com/api/v1/resolve?ref=asymmetric-al/core/agent-email-inbox GET https://markdownregistry.com/api/v1/blob/c6d71054fc076f4b9367a93b1be42914aede180ff55582fde9f7dafde60154b2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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Every file in asymmetric-al/core