fiat

fiat is a skill for Claude Code, Codex from wildcat-finance/skills. It costs 78 tokens per session (17,163 once invoked), scanned A, original, Apache-2.0.

A skill that runs a governed delivery loop for a Hexaemeron or Fiat project. It coordinates study, planning, implementation, auditing, writing, and pushing changes until a working prototype exists.

In plain words
What is it for?
Use it when explicitly starting, resuming, or reporting a Fiat delivery. It is intended for the one-shot implementation and review workflow described in the skill.
Why use it?
It gives a long multi-step delivery process a defined order and keeps track of its current work through an evolution ledger. It also assigns different parts of the process to specialist skills.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions Codex.

Part of the hexaemeron plugin — 15 skills shipped together

Good fit Use it when explicitly starting, resuming, or reporting a Fiat delivery. It is intended for the one-shot implementation and review workflow described in the skill.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wildcat-finance/skills/fiat
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 wildcat-finance/skills --skill fiat
Clone the repo
git clone --depth 1 https://github.com/wildcat-finance/skills

Made for: Claude Code, Codex.

Or install hexaemeron, the plugin that ships this one along with the rest of its 15 skills.

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 fiat

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/wildcat-finance/skills/fiat"><img src="https://agentmods.dev/badge/skills/wildcat-finance/skills/fiat.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 17,163 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: 4 findings, 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 154
    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.
  • medium Excessive Agency · line 627
    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.
  • medium Excessive Agency · line 160
    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.
  • medium Agent Snooping · line 290
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 $0.00078 $0.17163
Opus 5 $0.00039 $0.08582
Sonnet 5 $0.00016 $0.03433
Haiku 4.5 $0.00008 $0.01716

Measured 4d ago against content hash babe74b13895, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

fiat 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 4d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/audit_synopsis.py, scripts/check_wildcat_contributor.py, scripts/hexctl.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

plugins/hexaemeron/skills/fiat/SKILL.md · 975 lines

How it starts

The opening of the file, as written. The whole thing — 975 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fiat

Where this sits

Fiat owns the delivery controller, not Hexaemeron's bundled audit or prose skills. Its version, held frontier, next job, and maturity state live in EVOLUTION.md. Read that ledger before suggesting, starting, or resuming work intended to advance Fiat itself.

Current frontier. The ledger above is authoritative. Never substitute Hexaemeron's plugin-wide Solidity frontier for Fiat's own held target.

Synkrisis is outside this controller loop. It compares declared runs and stops there: it cannot select work, file an issue, mutate a repository, or dispatch Fiat. A finding remains evidence for a person to route, never a controller directive.

Phase skills

Six sibling skills carry the loop's content contracts; Fiat runs the loop and defers to them rather than restating their rules. Each slots in as follows:

Skill Slots into Carries
protasis study and runbook phases what a study must answer, what a runbook step must contain, when a topic decomposes first
phylax implement phase the boundaries a step introduces and the control each needs
ephoros implement phase what the step must emit once it runs unattended
metron implement phase refusal of any speed-motivated change without a recorded before and after
elenchus implement phase and audit rounds any failure surfaced mid-step or mid-round, worked to its cause
hypomnema prose phase what the step records and where it lives, before the masks run

Their lints run in every audit round, so meeting them during the step is cheaper than meeting them in the round. The phase notes below say how each one is applied.

Let there be light.

Drive the whole loop from durable controller state, never from conversation history. The controller emits one directive at a time; do the work it names, receipt it, ask for the next one. A phase without a receipt did not happen. Every state-backed command first validates the required version-1 container spine in deterministic order. A missing or wrong-kind container stops with one value-free path-and-kind diagnosis before a reader or writer can traverse it.

Read the full file on GitHub · 975 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. 4d ago Changed · +7 lines babe74b13895
  2. 6d ago Changed · +16 lines e45f16956427
  3. 7d ago Changed · +37 lines d30f98306483
  4. 8d ago Changed · +90 lines 809f4111662e
  5. 12d ago First seen · 825 lines · 78 tokens per session scan A 25091f0549b3

Subscribe to this mod's changes

fiat is a skill published in the GitHub repository wildcat-finance/skills (12 stars, last pushed today), licensed Apache-2.0. It adds 78 tokens to every session and 17,163 once invoked, about $0.0004 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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