basel-iii

basel-iii is a skill for Claude Code, Codex from brainbytes-dev/everything-claude-finance. It costs 0 tokens per session (2,315 once invoked), scanned A, original, MIT.

A reference guide to Basel banking rules for measuring capital, liquidity, leverage, and risk. Basel rules are international standards used to supervise banks.

In plain words
What is it for?
Use it when calculating CET1 and other capital ratios, risk-weighted assets, liquidity ratios, leverage, capital buffers, stress tests, or Basel IV effects.
Why use it?
It helps avoid rebuilding complex regulatory calculations from scratch and makes the relevant banking terms and thresholds easier to apply.

Skill for Claude CodeCodex

Part of the everything-claude-finance plugin — 13 skills, 22 commands, 20 agents shipped together

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.

agentmods
npx agentmods add skills/brainbytes-dev/everything-claude-finance/basel-iii
Any agent
npx skills add brainbytes-dev/everything-claude-finance --skill basel-iii
Clone the repo
git clone --depth 1 https://github.com/brainbytes-dev/everything-claude-finance

Made for: Claude Code, Codex.

Or install everything-claude-finance, the plugin that ships this one along with the rest of its 13 skills, 22 commands, 20 agents.

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 basel-iii

README.md
[![agentmods](https://agentmods.dev/badge/skills/brainbytes-dev/everything-claude-finance/basel-iii.svg)](https://agentmods.dev/skills/brainbytes-dev/everything-claude-finance/basel-iii)
Your own site
<a href="https://agentmods.dev/skills/brainbytes-dev/everything-claude-finance/basel-iii"><img src="https://agentmods.dev/badge/skills/brainbytes-dev/everything-claude-finance/basel-iii.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,315 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.02315
Opus 5 $0.00000 $0.01157
Sonnet 5 $0.00000 $0.00463
Haiku 4.5 $0.00000 $0.00231

Measured 5d ago against content hash 6f715c2158a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

basel-iii 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 5d 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/compliance/basel-iii/SKILL.md · 205 lines

How it starts

The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Basel III/IV Framework

Capital requirements, liquidity ratios, leverage — comprehensive Basel regulatory framework for banking supervision.

When to Activate

  • Capital adequacy calculations (CET1, Tier 1, Total Capital)
  • Risk-weighted asset computation (credit, market, operational risk)
  • Liquidity ratio analysis (LCR, NSFR)
  • Leverage ratio assessment
  • Capital buffer requirements
  • FRTB (Fundamental Review of the Trading Book) implementation
  • Basel IV output floor impact analysis
  • Regulatory capital planning and stress testing

Core Concepts

Capital Structure

Common Equity Tier 1 (CET1) — highest quality:

  • Common shares, retained earnings, accumulated OCI (with adjustments)
  • Deductions: goodwill, intangible assets, deferred tax assets (threshold), investments in financial institutions
  • Minimum requirement: 4.5% of RWA

Additional Tier 1 (AT1):

  • Perpetual instruments with loss-absorption features (CoCos — contingent convertibles)
  • Write-down or conversion trigger at CET1 ratio of 5.125% (or higher)
  • AT1 + CET1 minimum: 6.0% of RWA

Tier 2 Capital:

  • Subordinated debt (minimum 5-year original maturity, amortized in last 5 years)
  • Eligible provisions (up to limit)
  • Total Capital minimum: 8.0% of RWA

Capital Requirements Summary

                            Minimum    + Conservation    + Countercyclical    + G-SIB
CET1                         4.5%         7.0%             7.0-9.5%          8.0-10.5%
Tier 1                       6.0%         8.5%             8.5-11.0%         9.5-12.0%
Total Capital                8.0%        10.5%            10.5-13.0%        11.5-14.0%

Capital Buffers

Buffer Size Trigger Effect when breached
Conservation buffer 2.5% CET1 Always on Restrictions on dividends, buybacks, bonuses
Countercyclical buffer 0-2.5% CET1 Set by national authority based on credit cycle Restrictions on distributions
G-SIB surcharge 1.0-3.5% CET1 Systemically important banks (buckets 1-5) Restrictions on distributions
D-SIB surcharge Varies National authority designation Restrictions on distributions

Read the full file on GitHub · 205 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. 5d ago First seen · 205 lines · 0 tokens per session scan A 6f715c2158a5

Subscribe to this mod's changes

basel-iii is a skill published in the GitHub repository brainbytes-dev/everything-claude-finance (5 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,315 tokens. 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.

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