competition-custom-protocol-replay SKILL.md skillA
competition-custom-protocol-replay 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-custom-protocol-replay@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-custom-protocol-replay/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260925.9330cc6, committed Sep 25, 2026
- Size
- 3,075 bytes
- Repository stars
- 28
- License
- MIT
Internal downstream skill for ctf-sandbox-orchestrator. CTF-sandbox workflow for custom binary or text protocol recovery, handshake reconstruction, framing, sequence control, checksums, stateful replay, and accepted-session reproduction. Use when the user asks to decode an unknown protocol, recover custom framing, build a replay harness, satisfy sequence or checksum rules, replay a captured session, or prove the smallest message order that reaches an accepted branch. 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 Custom Protocol Replay 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 hard part is not merely naming the protocol, but reproducing the exact message order and state needed for acceptance. Reply in Simplified Chinese unless the user explicitly requests English. ## Quick Start 1. Identify client and server roles, session boundaries, and reset conditions before decoding field semantics. 2. Recover framing, lengths, delimiters, sequence numbers, checksums, nonces, and state transitions before broad replay attempts. 3. Keep one canonical transcript of a successful exchange. 4. Change one field or one message at a time while replaying. 5. Reproduce the smallest accepted conversation that proves the decisive branch. ## Workflow ### 1. Map The Session State Machine - Identify handshake, negotiation, authentication, keepalive, command, and teardown phases. …
Read the whole file at its exact version.
How to install
mdr add novaestellar/novahaku/competition-custom-protocol-replay@sha256:54855df67335ab86The 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_tj6ypdmuhschbrhs)
5 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 (3075 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_tj6ypdmuhschbrhs GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/competition-custom-protocol-replay GET https://markdownregistry.com/api/v1/blob/54855df67335ab86fc80c635f0d7f95b78849999b0af3536c7275e4b01000e6c
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.