auditing-cross-chain-bridge-and-message-trust SKILL.md skillA
auditing-cross-chain-bridge-and-message-trust from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-cross-chain-bridge-and-message-trust@git:20260901.f8395d1Pins git:20260901.f8395d1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-cross-chain-bridge-and-message-trust/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260901.f8395d1, committed Sep 1, 2026
- Size
- 10,614 bytes
- Repository stars
- 26
- License
- MIT
Audit a cross-chain bridge or messaging protocol for misplaced trust in messages that cross chains: a destination contract that accepts a mint or release on a forged or unverified proof of a source-chain event, a message whose signer set or validator quorum can be spoofed or is too small, a message that can be replayed on the destination or across chains for a repeated withdrawal, and a lock-and-mint or burn-and-release accounting that a crafted message pushes out of balance. Covers token…
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
# Auditing cross-chain bridge and message trust: the destination must prove the source event, not assume it A cross-chain bridge does one hard thing: it makes an action on the destination chain, minting a wrapped token, releasing locked funds, running a message, conditional on an event that happened on the source chain. The destination cannot see the source directly, so it trusts a proof or an attestation that the event occurred, and every bridge hack is a failure of that trust. If the destination accepts a mint or release on a forged proof, an unverified claim, or an attestation from a signer set an attacker can spoof or that is too small to be safe, the attacker manufactures value from nothing. If a valid message can be replayed, on the destination twice, or on another chain, one legitimate event authorizes many withdrawals. And the lock-and-mint or burn-and-release accounting that is supposed to keep supply balanced can be pushed out of balance by a message that mints without a matching lock or releases without a matching burn. The audit follows a message from source event to …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-cross-chain-bridge-and-message-trust@sha256:ac93cc944dbc8304The line at the top of this page pins the label git:20260901.f8395d1, 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_c2trejw2lwijt3tf)
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Versions
The registry has recorded 1 version of this file, committed on Sep 1, 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 (10614 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
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c2trejw2lwijt3tf GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-cross-chain-bridge-and-message-trust GET https://markdownregistry.com/api/v1/blob/ac93cc944dbc8304cfdbefd94eeabe8af6f8ec8d453df29e9c85bf29313e9e21
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.