toy-verification

toy-verification is a skill for Claude Code, Codex from sillyDaibo/reasflow-dev. It costs 24 tokens per session (309 once invoked), scanned A, original, MIT.

A method for testing an algorithm or proof idea on very small examples before doing a full implementation or experiment.

In plain words
What is it for?
Use it to create a worked example, test an adversarial edge case, and decide whether the idea is ready to scale up.
Why use it?
Small hand-checkable cases can reveal wrong assumptions and edge cases early, before more work is invested.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is if [ -d ./.codex/reasflow-skills ]; then.

Good fit Use it to create a worked example, test an adversarial edge case, and decide whether the idea is ready to scale up.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/sillyDaibo/reasflow-dev
agentmods
npx agentmods add skills/sillydaibo/reasflow-dev/toy-verification

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 toy-verification

README.md
[![agentmods](https://agentmods.dev/badge/skills/sillydaibo/reasflow-dev/toy-verification/github.svg)](https://agentmods.dev/skills/sillydaibo/reasflow-dev/toy-verification)
Your own site
<a href="https://agentmods.dev/skills/sillydaibo/reasflow-dev/toy-verification"><img src="https://agentmods.dev/badge/skills/sillydaibo/reasflow-dev/toy-verification/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 toy-verification

Your own site · 80×15
<a href="https://agentmods.dev/skills/sillydaibo/reasflow-dev/toy-verification"><img src="https://agentmods.dev/badge/skills/sillydaibo/reasflow-dev/toy-verification.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 309 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.
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 $0.00024 $0.00309
Opus 5 $0.00012 $0.00154
Sonnet 5 $0.00005 $0.00062
Haiku 4.5 $0.00002 $0.00031

Measured 8d ago against content hash 3ab63fa76391, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

toy-verification 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 8d 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.

skills/reasflow/algorithm/toy-verification/SKILL.md · 39 lines

What it actually says

Installed Root

Resolve the installed reasflow-dev private skills root before running packaged scripts:

REASFLOW_PRIVATE_SKILLS_ROOT="${REASFLOW_PRIVATE_SKILLS_ROOT:-}"
if [ -z "$REASFLOW_PRIVATE_SKILLS_ROOT" ]; then
  if [ -d ./.codex/reasflow-skills ]; then
    REASFLOW_PRIVATE_SKILLS_ROOT="$(pwd)/.codex/reasflow-skills"
  elif [ -d "$HOME/.codex/reasflow-skills" ]; then
    REASFLOW_PRIVATE_SKILLS_ROOT="$HOME/.codex/reasflow-skills"
  else
    echo "reasflow private skills not found in ./.codex/reasflow-skills or $HOME/.codex/reasflow-skills" >&2
    exit 1
  fi
fi

Toy Verification

Overview

Tiny examples expose hidden assumptions fast. Use them to verify the mechanism, not to claim final performance.

Workflow

  1. Build the smallest example that still exercises the core logic.
  2. Work through expected behavior by hand.
  3. Add one adversarial edge case.
  4. Record what the toy example validates and what it cannot.

Deliverables

  • worked example with expected outputs
  • edge-case note
  • go or no-go recommendation for scaling up
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. 8d ago First seen · 39 lines · 24 tokens per session scan A 3ab63fa76391

Subscribe to this mod's changes

toy-verification is a skill published in the GitHub repository sillyDaibo/reasflow-dev (2 stars, last pushed 12d ago), licensed MIT. It adds 24 tokens to every session and 309 once invoked, about $0.0001 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 2026-08-31.