outcome-determinism

outcome-determinism is a skill for Claude Code, Codex from PlamenTSV/plamen. It costs 40 tokens per session (1,950 once invoked), scanned A, original, MIT.

An audit method for checking whether protocol outcomes can be predicted or influenced through finite selections, deadlines, or fallback rules.

In plain words
What is it for?
It is for reviewing selection logic, shrinking pools, expiry handling, and time-gated fallback behavior in blockchain protocols.
Why use it?
It helps identify cases where users can gain an advantage by timing transactions or exploiting predictable defaults.

Skill for Claude CodeCodex

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

Good fit It is for reviewing selection logic, shrinking pools, expiry handling, and time-gated fallback behavior in blockchain protocols.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/plamentsv/plamen/outcome-determinism
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 outcome-determinism
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 outcome-determinism

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/plamentsv/plamen/outcome-determinism"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/outcome-determinism.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,950 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 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 120
    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.
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 $0.00040 $0.01950
Opus 5 $0.00020 $0.00975
Sonnet 5 $0.00008 $0.00390
Haiku 4.5 $0.00004 $0.00195

Measured 6d ago against content hash 89549ccd7065, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

outcome-determinism 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 6d 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/outcome-determinism/SKILL.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Injectable Skill: Outcome Determinism - Selection Fairness & Strategic Timing

Protocol Type Trigger: outcome_determinism - detected when EITHER of these code patterns are present:

  • Selection from finite depletable pool with fallback behavior (while(full) next, modulo with shrinking domain, category/slot/validator selection)
  • Time-gated actions with observable default/fallback outcomes (deadline, claimPeriod, defaultSelection, expiry + fallback path that computes from predictable state) Inject Into: Breadth agents, depth-edge-case Language: All (rational actor patterns are chain-agnostic) Finding prefix: [OD-N] Added in: v1.1

NOTE: Callback selective revert (Section 1a of the original skill) and RNG consumption enumeration (Section 1b) are now ALWAYS-ON checks in the depth agent template - they do not require this injectable to trigger.

What This Injectable Adds (beyond always-on checks)

The always-on depth template already covers:

  • Callback selective revert: Full taxonomy of external execution transfers (ERC-721/1155/777/1363, flash loans, hooks, low-level calls, ETH transfers) - see depth-templates.md "CALLBACK SELECTIVE REVERT ANALYSIS"
  • Tainted source consumption enumeration: RNG/oracle consumed by multiple functions → rate severity by worst consumer - see depth-templates.md PART 1 item 6

This injectable adds analysis that only applies when SPECIFIC structural patterns exist:


1. Selection Fairness Under Constraint Changes

For every selection algorithm operating on a set that can shrink, grow, or be modified between selections:

1a. Probability Redistribution on Depletion

Selection Function Pool Size Depletion Mechanism Fallback Behavior Redistribution Fair?

Fairness test: When element X is removed from a pool of N:

  • Fair: Each remaining element gets probability 1/(N-1) - uniform redistribution
  • Biased: Sequential fallback (index++, next slot) - adjacent element gets doubled probability
  • Broken: Infinite loop (no exit when all depleted) or unreachable elements

Read the full file on GitHub · 141 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. 6d ago First seen · 141 lines · 40 tokens per session scan A 89549ccd7065

Subscribe to this mod's changes

outcome-determinism is a skill published in the GitHub repository PlamenTSV/plamen (295 stars, last pushed 2d ago), licensed MIT. It adds 40 tokens to every session and 1,950 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.

Related

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.

mukul975/Anthropic-Cybersecurity-Skills · 49 tokens

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.

prowler-cloud/prowler · 41 tokens

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…

cdump/evmole · 135 tokens

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…

OriginProtocol/origin-dollar · 70 tokens

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.

Awarexone/web3-bug-bounty-hunting-ai-skills · 59 tokens

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.

Awarexone/web3-bug-bounty-hunting-ai-skills · 39 tokens