competition-mailbox-abuse SKILL.md skillA
competition-mailbox-abuse from novaestellar/novahaku is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add novaestellar/novahaku/competition-mailbox-abuse@git:20260925.9330cc6Pins git:20260925.9330cc6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- novaestellar/novahaku
- Path
testing/ctf-sandbox/competition-mailbox-abuse/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260925.9330cc6, committed Sep 25, 2026
- Size
- 3,376 bytes
- Repository stars
- 28
- License
- MIT
Internal downstream skill for ctf-sandbox-orchestrator. CTF-sandbox workflow for enterprise mail abuse, OAuth consent, inbox or forwarding rules, transport rules, shared mailbox access, phishing chains, and token-to-mailbox side effects. Use when the user asks to trace mailbox rules, OAuth consent grants, forwarding or delegate abuse, shared mailbox access, message-trace evidence, or explain how mail artifacts turn into persistence, exfiltration, or privilege. Use only after…
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
# Competition Mailbox Abuse Use this skill only as a downstream specialization after `$ctf-sandbox-orchestrator` is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to `$ctf-sandbox-orchestrator` first. Use this skill when the decisive path runs through mailbox behavior, consent flow, or message-routing effects rather than generic AD evidence alone. Reply in Simplified Chinese unless the user explicitly requests English. ## Quick Start 1. Decide whether the active path is phishing-to-consent, token-to-mailbox, rule-based persistence, or transport-level mail rerouting. 2. Keep mailbox evidence, identity evidence, and message-trace evidence tied to the same user, mailbox, token, or message ID. 3. Separate possession of a token or delegate edge from the actual mailbox effect it enables. 4. Record forwarding targets, rule predicates, consent scopes, shared mailbox edges, and resulting mail flow in compact blocks. 5. Reproduce the smallest mail effect that proves persistence, exfiltration, or privilege. ## Workflow ### 1. Map The Mail Trust Path …
Read the whole file at its exact version.
How to install
mdr add novaestellar/novahaku/competition-mailbox-abuse@sha256:871a992497875303The line at the top of this page pins the label git:20260925.9330cc6, 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_jcyqe7apjs3uqu7p)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 25, 2026.
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 (3376 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
novaestellar/novahaku · 28 stars · license MIT · pushed 2026-09-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jcyqe7apjs3uqu7p GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/competition-mailbox-abuse GET https://markdownregistry.com/api/v1/blob/871a99249787530371e850012708ba8b805cce9946fb3d5bf8d81a3ee3cad0c0
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.