Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add PlamenTSV/plamen --skill cross-chain-message-integritygit clone --depth 1 https://github.com/PlamenTSV/plamenWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/plamentsv/plamen/cross-chain-message-integrity)<a href="https://agentmods.dev/skills/plamentsv/plamen/cross-chain-message-integrity"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/cross-chain-message-integrity/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/plamentsv/plamen/cross-chain-message-integrity"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/cross-chain-message-integrity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Anti-Refusal · line 157 Skill instructs the agent to never refuse or to always comply. Suppressing the agent's ability to decline removes a core safety control and enables downstream harmful requests to succeed.Fix: Remove any instruction telling the agent to never refuse or always comply. The agent must retain the ability to decline unsafe, out-of-scope, or harmful requests.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00030 | $0.01962 |
| Opus 5 | $0.00015 | $0.00981 |
| Sonnet 5 | $0.00006 | $0.00392 |
| Haiku 4.5 | $0.00003 | $0.00196 |
Grade A, and why
cross-chain-message-integrity scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: Cross-Chain Message Integrity
Type: Thought-template (instantiate before use) Trigger Pattern: CROSS_CHAIN_MSG flag detected (protocol RECEIVES cross-chain messages) Inject Into: Breadth agents, depth-external Finding prefix:
[CMI-N]Rules referenced: R1, R2, R4, R8, R10
Covers: message endpoint authentication, peer/remote verification, replay protection, payload validation, and message ordering for bridge-receiving protocols.
This skill is SEPARATE from CROSS_CHAIN_TIMING (which covers stale state and latency arbitrage for L2 interactions). Use this skill when the protocol RECEIVES and PROCESSES inbound cross-chain messages. Use CROSS_CHAIN_TIMING when the protocol READS state synced across chains.
Trigger Patterns
lzReceive|_ccipReceive|receiveWormholeMessages|onOFTReceived|
setPeer|setTrustedRemote|_nonblockingLzReceive|executeMessage|
_processMessageFrom|ILayerZeroReceiver|IAny2EVMMessageReceiver|
endpoint.*receive|bridge.*receive|relayer.*deliver|_lzReceive
Step 1: Message Receiving Surface Inventory
For each function that processes inbound cross-chain messages:
| # | Function | Bridge Protocol | Source Auth? | Payload Validated? | State Modified | Access Control |
|---|
For each entry:
- What bridge/messaging protocol delivers the message?
- Can the function be called DIRECTLY by anyone, or only via the bridge endpoint?
- What state does the function modify based on message content? (mint, unlock, update, execute)
Step 2: Endpoint Authentication Audit
For EACH message-receiving function:
2a. Caller Verification
| # | Check | Status | Location |
|---|---|---|---|
| 1 | msg.sender == endpoint/router verified |
YES/NO | {line} |
| 2 | Endpoint address immutable or admin-protected | YES/NO | {line} |
| 3 | Modifier checks the CORRECT address variable | YES/NO | {line} |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 190 lines · 30 tokens per session scan A a1af1ecbddb3
cross-chain-message-integrity is a skill published in the GitHub repository PlamenTSV/plamen (294 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 1,962 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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