cosmos-sdk-module-safety

cosmos-sdk-module-safety is a skill for Claude Code, Codex from PlamenTSV/plamen. It costs 66 tokens per session (4,226 once invoked), scanned A, original, MIT.

A security audit for Cosmos-SDK and CometBFT blockchain modules. These are software frameworks for building blockchains, where all network computers must agree on the same results.

In plain words
What is it for?
Use it to check blockchain modules for inconsistent calculations, unsafe transaction handling, broken account records, missing message handlers, and fee or gas errors.
Why use it?
It looks for code problems that could make computers disagree, stop processing blocks, mishandle funds, or accept unauthorized actions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to check blockchain modules for inconsistent calculations, unsafe transaction handling, broken account records, missing message handlers, and fee or gas errors.

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Install with agentmods
npx agentmods add skills/plamentsv/plamen/cosmos-sdk-module-safety
Install

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.

Any agent
npx skills add PlamenTSV/plamen --skill cosmos-sdk-module-safety
Clone the repo
git clone --depth 1 https://github.com/PlamenTSV/plamen

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for cosmos-sdk-module-safety

README.md
[![agentmods](https://agentmods.dev/badge/skills/plamentsv/plamen/cosmos-sdk-module-safety/github.svg)](https://agentmods.dev/skills/plamentsv/plamen/cosmos-sdk-module-safety)
Your own site
<a href="https://agentmods.dev/skills/plamentsv/plamen/cosmos-sdk-module-safety"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/cosmos-sdk-module-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.

agentmods 80×15 button for cosmos-sdk-module-safety

Your own site · 80×15
<a href="https://agentmods.dev/skills/plamentsv/plamen/cosmos-sdk-module-safety"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/cosmos-sdk-module-safety.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,226 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

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 →

  • medium Excessive Agency · line 65
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00066 $0.04226
Opus 5 $0.00033 $0.02113
Sonnet 5 $0.00013 $0.00845
Haiku 4.5 $0.00007 $0.00423

Measured 10d ago against content hash 30f1c2ee4c4b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cosmos-sdk-module-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 10d 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.

agents/skills/injectable/l1/cosmos-sdk-module-safety/SKILL.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Injectable Skill: Cosmos-SDK / CometBFT Module Safety

L1 trigger: L1_PATTERN=true AND COSMOS_SDK (cosmos-sdk / cometbft / tendermint / x/ modules detected) Inject Into: depth-consensus-invariant, depth-state-trace Language: Go (Cosmos-SDK) Finding prefix: [COS-N] Status: v0.1

Orchestrator Decomposition Guide

  • Sections 1, 2, 6, 7: depth-consensus-invariant (determinism, ABCI-hook metering, ABCI panics, Msg routing — all chain-halt / safety class)
  • Sections 3, 4, 5, 8: depth-state-trace (signer/state authority, module-account invariant, Dec rounding, fee/gas overflow — all accounting / authorization class)
  • A single bug can span both lenses; record it once and cross-reference.

When This Skill Activates

Recon classifies the target as a Cosmos-SDK / CometBFT application chain or module set (go.mod requires cosmossdk.io/..., github.com/cosmos/cosmos-sdk, github.com/cometbft/cometbft, github.com/tendermint/tendermint, or the tree has x/<module>/keeper, x/<module>/types, abci.go, module.go). Cosmos app-chain bugs are predominantly consensus-halting (every validator must compute byte-identical state) and accounting (module accounts must reconcile) — both are in scope for Plamen L1 audits. Severity baseline is Medium; chain-halt / fork and fund-loss classes upgrade to High/Critical per docs/l1-mode/severity-matrix.md.

A Cosmos state-transition path is any code reachable from a Msg handler (msgServer methods), BeginBlock, EndBlock, InitGenesis, EndBlocker, PreBlocker, or an AnteHandler/PostHandler that mutates committed state. Everything in those paths runs on every validator and MUST be deterministic and panic-safe.

1. Non-Determinism in State-Transition Paths

Check: No state-transition path may depend on per-node, wall-clock, or unordered data. Two honest validators replaying the same block MUST compute the same app hash; any divergence forks or halts the chain.

Read the full file on GitHub · 173 lines

Changes

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.

  1. 10d ago First seen · 173 lines · 66 tokens per session scan A 30f1c2ee4c4b

Subscribe to this mod's changes

cosmos-sdk-module-safety is a skill published in the GitHub repository PlamenTSV/plamen (295 stars, last pushed 2d ago), licensed MIT. It adds 66 tokens to every session and 4,226 once invoked, about $0.0003 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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