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-timinggit 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-timing)<a href="https://agentmods.dev/skills/plamentsv/plamen/cross-chain-timing"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/cross-chain-timing.svg" alt="Measured on agentmods" 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 237 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 | $0.00047 | $0.04223 |
| Opus 5 | $0.00023 | $0.02112 |
| Sonnet 5 | $0.00009 | $0.00845 |
| Haiku 4.5 | $0.00005 | $0.00422 |
Grade A, and why
cross-chain-timing 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 — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CROSS_CHAIN_TIMING Skill (Aptos)
Trigger Pattern:
wormhole|layerzero|ccip|bridge|cross_chain|vaa|guardian|emitter|relay|remote_chain|payload|nonce.*sequenceInject Into: Breadth agents, depth-external Finding prefix:[CCT-N]Rules referenced: R1, R2, R4, R8, R10, R16
Covers: cross-chain message verification, timing asymmetry between Aptos and other chains, resource creation requirements, nonce/sequence replay protection, and cross-chain price relay staleness.
Aptos's fast finality (~1 second with BFT consensus) creates a fundamental timing asymmetry with slower chains (Ethereum ~12min, rollups 10-60min). This asymmetry is the primary attack vector for cross-chain timing exploits on Aptos. Additionally, Move's type-safe resource model introduces unique account/resource requirements for cross-chain operations.
Step 1: Identify Cross-Chain Messaging Infrastructure
Find all cross-chain messaging calls and infrastructure:
| # | Bridge/Protocol | Direction | Aptos Function | Remote Chain | Message Type |
|---|---|---|---|---|---|
| 1 | {Wormhole/LayerZero/CCIP/custom} | {Aptos->Remote / Remote->Aptos} | {function name} | {Ethereum/Arbitrum/etc.} | {token transfer / state sync / price relay / governance} |
Wormhole-Specific Inventory
If Wormhole is detected:
| Component | Module/Function | Purpose | Location |
|---|---|---|---|
| VAA Verification | vaa::parse_and_verify / guardian signature check |
Guardian signature verification | {file:line} |
| Message Posting | wormhole::publish_message |
Send message from Aptos | {file:line} |
| Token Bridge | complete_transfer / create_wrapped_coin |
Token bridging | {file:line} |
| Emitter Resource | Emitter capability or resource | Message source identity | {file:line} |
LayerZero-Specific Inventory
If LayerZero is detected:
| Component | Module/Function | Verification Method | Location |
|---|---|---|---|
| Endpoint | endpoint::lz_receive / receive handler |
Oracle + Relayer attestation | {file:line} |
| Remote Mapping | Trusted remote configuration | Address/chain validation | {file:line} |
| Nonce Tracking | Inbound/outbound nonce resources | Replay prevention | {file: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 · 322 lines · 47 tokens per session scan A 2b957b344f0a
cross-chain-timing is a skill published in the GitHub repository PlamenTSV/plamen (294 stars, last pushed today), licensed MIT. It adds 47 tokens to every session and 4,223 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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