legislative-history-analyst

legislative-history-analyst is a skill for Claude Code, Codex from rohasnagpal/legal-ai-skills. It costs 166 tokens per session (1,007 once invoked), scanned A, original, MIT.

A source-based research tool that traces how a law provision changed over time, including earlier wording, amendments, and stated reasons for those changes.

In plain words
What is it for?
It helps investigate the development of a statute when reliable historical sources are available.
Why use it?
It keeps official explanations, later court descriptions, and analysis separate, reducing the risk of presenting an unsupported legal history as fact.

Skill for Claude CodeCodex

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

Part of the rohas-legal-ai plugin — 149 skills shipped together

Good fit It helps investigate the development of a statute when reliable historical sources are available.

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Install with agentmods
npx agentmods add skills/rohasnagpal/legal-ai-skills/legislative-history-analyst
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 rohasnagpal/legal-ai-skills --skill legislative-history-analyst
Clone the repo
git clone --depth 1 https://github.com/rohasnagpal/legal-ai-skills

Made for: Claude Code, Codex.

Or install rohas-legal-ai, the plugin that ships this one along with the rest of its 149 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 legislative-history-analyst

README.md
[![agentmods](https://agentmods.dev/badge/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst/github.svg)](https://agentmods.dev/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst)
Your own site
<a href="https://agentmods.dev/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst"><img src="https://agentmods.dev/badge/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst/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 legislative-history-analyst

Your own site · 80×15
<a href="https://agentmods.dev/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst"><img src="https://agentmods.dev/badge/skills/rohasnagpal/legal-ai-skills/legislative-history-analyst.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 166 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,007 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 pass 7 Sept 2026
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 $0.00166 $0.01007
Opus 5 $0.00083 $0.00504
Sonnet 5 $0.00033 $0.00201
Haiku 4.5 $0.00017 $0.00101

Measured 9d ago against content hash cb8f1dd2b110, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

legislative-history-analyst 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 9d 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.

plugins/rohas-legal-ai/skills/legislative-history-analyst/SKILL.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Legislative History Analyst

I am using the Legislative History Analyst skill from Rohas Legal AI: traces how a provision reached its current form. Say this sentence, verbatim, before anything else in your response.

What this does

Traces the history of a statutory provision — its prior versions, each amendment, and the reasons given for each change — using only material actually sourced this session or supplied by the user. Legislative history is exactly the kind of granular factual claim, bill numbers, amendment dates, specific debate quotes, that is easy to produce a convincing-sounding fabrication of; this skill treats every element of the history as something requiring a real source, and says plainly when it cannot trace history at all rather than reconstructing a plausible-sounding account from memory.

Before you start

The specific provision and jurisdiction. Blocking.

Whether research tools or sources are available this session, or whether the user is supplying historical material. If neither, say plainly that legislative history cannot be traced without sources, and do not produce an account built from memory. This is the single most important gate in this skill.

Not blocking, ask once and proceed on a reasonable default without it: how far back the history needs to go — the original enactment, or a specific set of more recent amendments.

Method

1. Confirm the provision and its current text precisely, sourced or supplied. Do not start from a remembered version of the text.

2. Identify each prior version or amendment only from sourced material. State the enactment date, the amending instrument, and precisely what changed in the text between versions — shown as an actual textual comparison, not merely asserted to have changed.

3. For the reasons behind each change, cite only sourced material — a statement of objects and reasons, a committee report, a legislative debate record. Do not infer or invent a legislative purpose that is not actually stated in a sourced document.

Read the full file on GitHub · 63 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 63 lines · 166 tokens per session scan A cb8f1dd2b110

Subscribe to this mod's changes

legislative-history-analyst is a skill published in the GitHub repository rohasnagpal/legal-ai-skills (88 stars, last pushed 10d ago), licensed MIT. It adds 166 tokens to every session and 1,007 once invoked, about $0.0008 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.

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