Proofpoint URL Defense SKILL.md skillA
Proofpoint URL Defense from wyre-ai/msp-claude-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wyre-ai/msp-claude-plugins/Proofpoint URL Defense@git:20260806.2d05ac2Pins git:20260806.2d05ac2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wyre-ai/msp-claude-plugins
- Path
msp-claude-plugins/email-security/proofpoint/skills/url-defense/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260806.2d05ac2, committed Aug 6, 2026
- First version recorded
- Apr 5, 2026
- Size
- 11,509 bytes
- Repository stars
- 52
- License
- Apache-2.0
Proofpoint URL Defense fundamentals: URL rewriting (v2/v3 formats), click-time analysis and verdicts, and manual/API decoding of rewritten URLs back to their originals.
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
# Proofpoint URL Defense ## Overview Proofpoint URL Defense rewrites URLs in email messages to route clicks through Proofpoint's analysis infrastructure. When a user clicks a rewritten URL, Proofpoint performs real-time analysis of the destination before allowing or blocking access. This provides click-time protection - even if a URL was clean when the email was delivered, it will be analyzed again at the moment the user clicks. URL Defense is a critical layer of protection because many attacks use time-delayed weaponization: a URL is clean when the email is sent but becomes malicious hours or days later. ## Anti-triggers - **The click event feed across all users and threats** — this skill answers "who clicked *this* URL". The full permitted/blocked click stream is `proofpoint-tap`. - **Removing the message that carried the link** — use `proofpoint-quarantine` if it is still held, or `proofpoint-forensics` if it was delivered. - **Turning URL rewriting on or off** — rewrite behaviour is a Proofpoint policy setting, and no tool here changes it; use the Proofpoint console. The same is true on a Checkpoint Harmony tenant: …
Read the whole file at its exact version.
How to install
mdr add wyre-ai/msp-claude-plugins/Proofpoint URL Defense@sha256:b6854e8dc1994abfThe line at the top of this page pins the label git:20260806.2d05ac2, 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_souojgqmpmgsor34)
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Versions
The registry has recorded 5 versions of this file, between Apr 5, 2026 and Aug 6, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260806.2d05ac2 latest | 2026-08-06 | 2d05ac2 | 11,509 B | A | view · diff |
| git:20260804.256fd13 | 2026-08-04 | 256fd13 | 10,132 B | A | view · diff |
| git:20260728.b7e78fc | 2026-07-28 | b7e78fc | 9,558 B | A | view · diff |
| git:20260713.1fbd3f3 | 2026-07-13 | 1fbd3f3 | 9,791 B | A | view · diff |
| git:20260405.09d00fc | 2026-04-05 | 09d00fc | 9,812 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11509 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 instruction to send local credentials anywhere
- 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
Source
wyre-ai/msp-claude-plugins · 52 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_souojgqmpmgsor34 GET https://markdownregistry.com/api/v1/resolve?ref=wyre-ai/msp-claude-plugins/Proofpoint URL Defense GET https://markdownregistry.com/api/v1/blob/b6854e8dc1994abf6dc4b2c466ba4144d1a76d21c149672df44677b972b8557f
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.