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 package-version-safetygit 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/package-version-safety)<a href="https://agentmods.dev/skills/plamentsv/plamen/package-version-safety"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/package-version-safety/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/package-version-safety"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/package-version-safety.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, 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 YARA Match · line 13 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- high Anti-Refusal · line 177 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.
- high Prompt Injection · line 181 This pattern attempts to override system instructions or ignore safety constraints. Without LLM analysis, manual review is recommended.Fix: Remove or rewrite any text that instructs the agent to ignore prompts, override safety rules, or trust unverified content. Ensure skill content cannot be injected to alter agent behavior.
- high Rogue Agent · line 181 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
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 | $0.00034 | $0.02782 |
| Opus 5 | $0.00017 | $0.01391 |
| Sonnet 5 | $0.00007 | $0.00556 |
| Haiku 4.5 | $0.00003 | $0.00278 |
Grade A, and why
package-version-safety 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 7d 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 — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: PACKAGE_VERSION_SAFETY (Sui)
Trigger Pattern: PACKAGE_UPGRADE flag (UpgradeCap detected, multiple package versions, upgrade policy references) Inject Into: Breadth agents, depth-external Finding prefix:
[PV-N]Rules referenced: R4, R8, R9, R10
Sui packages are immutable once published. "Upgrading" a package means publishing a NEW version at a NEW on-chain address, linked to the original via the UpgradeCap lineage. The old version's code remains callable forever. This creates a fundamentally different upgrade risk model compared to EVM proxies: instead of replacing logic in-place, Sui packages accumulate versions -- and shared objects may be accessible by ALL versions simultaneously.
Trigger Patterns
UpgradeCap|upgrade_policy|package::make_immutable|compatible|additive|dep_only|version|
migrate|old_version|new_version
Step 1: Upgrade Policy Inventory
For each package in scope:
| # | Package | UpgradeCap Location | UpgradeCap Holder | Has store? |
Upgrade Policy | Destroyed? |
|---|---|---|---|---|---|---|
| 1 | {pkg_name} | {init function:line} | {address / shared / wrapped in governance} | YES/NO | {compatible/additive/dep_only} | YES (immutable) / NO |
Checks:
-
Where is UpgradeCap stored?
- Owned by deployer address: Single point of failure. Key loss -> permanent immutability. Key theft -> attacker can upgrade.
- Shared object: DANGEROUS -- anyone can pass it to upgrade functions.
- Wrapped in governance object: Good pattern -- upgrade requires governance approval.
- Destroyed via
make_immutable(): Package is permanently immutable. No upgrade risk. - Transferred to
@0x0or burn address: Effectively immutable.
-
Can UpgradeCap be transferred?
- UpgradeCap has
key + storeby default -> freely transferable viapublic_transfer. - Is there a custom wrapper restricting transfer? (e.g.,
GovernanceCapwrappingUpgradeCap) - If transferable and held by EOA -> attacker stealing key can transfer UpgradeCap.
- UpgradeCap has
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.
- 7d ago First seen · 243 lines · 34 tokens per session scan A a648d3fce350
package-version-safety is a skill published in the GitHub repository PlamenTSV/plamen (295 stars, last pushed 3d ago), licensed MIT. It adds 34 tokens to every session and 2,782 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 2026-09-03.
Other skills, from other repositories
analyzing-ethereum-smart-contract-vulnerabilities
Perform static and symbolic analysis of Solidity smart contracts using Slither and Mythril to detect reentrancy, integer overflow, access control, and other vulnerability classes before deployment to Ethereum mainnet.
prowler-tour
Keeps product-tour definitions aligned with the UI features they describe. Trigger: When modifying UI components that have associated tours, editing tour definition files, or renaming data-tour-id attributes.
evm-bytecode-analysis
Analyze supplied deployed EVM runtime bytecode with EVMole or guide a separate application in integrating a published EVMole Rust, Go, Python, or JavaScript binding. Use for unverified-contract inspection, ABI reconstruction from runtime code, selector discovery, storage-access analysis, EVM control-flow inspection…
talos-action-development
Develop, modify, review, and maintain standalone Talos actions in contracts/tasks/actions, including chain guardrails, contract bindings, transaction safety, schedules, action catalogues, and Talos documentation. Use when adding an action, changing an action’s behavior or parameters, updating a Talos schedule, or…
web3-poc-foundry
Complete Foundry PoC writing guide + all cheatcodes + DeFiHackLabs reproduction patterns. Use this when building a proof of concept exploit, setting up a fork test, using Foundry cheatcodes, or reproducing a known DeFi hack for learning.
web3-grep-arsenal
Master grep command arsenal for Web3 smart contract auditing. Use when starting a new protocol scan, before deep code review, or when hunting specific vulnerability classes.