Atlas / Skills / anthropics / Amendment History

Amendment HistoryCAUTION

skills/anthropics/amendment-history

A suite of plugins for legal workflows

Verdict
CAUTION
Grade
C
Trust score
79 /100
Version
—
Hosts
—
License
Apache-2.0
Stars
9,779
01

Overview

A suite of plugins for legal workflows

Read from source at commit cb488a888d20OBSERVED · 2026-10-23
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02

What it tells the agent

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: amendment-history
description: >
  Trace how a contract has changed across its base agreement and all amendments —
  either a summary of all changes over time, or a provision trace for a specific
  clause. Use when the user says "what changed in this contract over time", "show
  me the amendment history", "where's the latest [clause]", "how has [provision]
  evolved", or uploads multiple versions of an agreement.
argument-hint: "[file(s) | [CLM ID (coming soon)] | [repository link (coming soon)]] [--provision <clause name>]"
---

# /amendment-history

Loads a base agreement and all amendments, then either summarizes what
changed over time or traces a specific provision to its current
controlling language.

## Instructions

1. **Get the documents:** From file upload, [CLM ID (coming soon)], or [repository link (coming soon)]. Accept multiple files in one invocation. If none
   provided, ask.

2. **Detect the mode** by parsing the request per the mode
   detection rules below. If a provision name is clearly stated, go straight
   to Mode 2. If no provision is mentioned, run Mode 1. Ask only if
   genuinely ambiguous.

3. **Run the workflow below.** Follow it fully.

4. **Offer follow-ups after output:**
   - "Want me to trace another provision?"
   - "Want a full playbook review of the current agreement as amended?"
     (routes to vendor-agreement-review)
   - "Want a stakeholder summary of the key changes?"
     (routes to stakeholder-summary)

## Examples

```
/commercial-legal:amendment-history acme-msa.pdf amendment-1.pdf amendment-2.pdf
```

```
/commercial-legal:amendment-history --provision indemnity
```

```
/commercial-legal:amendment-history
[paste agreement and amendment text]
```

---

## Matter context

**Matter context.** Check `## Matter workspaces` in the practice-level CLAUDE.md. If `Enabled` is `✗` (the default for in-house users), skip the rest of this paragraph — skills use practice-level context and the matter machinery is invisible. If enabled and there is no active matter, ask: "Which matter is this for? Run `/commercial-legal:matter-workspace switch <slug>` or say `practice-level`." Load the active matter's `matter.md` for matter-specific context and overrides. Write outputs to the matter folder at `~/.claude/plugins/config/claude-for-legal/commercial-legal/matters/<matter-slug>/`. Never read another matter's files unless `Cross-matter context` is `on`.

---

## Purpose

Contracts accumulate amendments. By the third amendment, nobody remembers
what the original said or which version of a clause controls. This skill
reads the base agreement and all amendments in chronological order and
either summarizes what changed across the whole contract or traces a
specific provision through every version to find the current controlling
language.

## Mode detection

Parse the user's request to determine which mode to run. Do not ask
which mode unless the request is genuinely ambiguous.

**Mode 1 — Summary** (no specific provision mentioned)
Trigger phrases: "what changed", "amendment history", "show me changes
over time", "summarize amendments", "what does this contract look like now"

**Mode 2 — Provision trace** (specific clause or topic named)
Trigger phrases: "where's the [clause]", "latest [provision]", "how did
[term] change", "find the indemnity", "what does it say now about [topic]"

Common provision mappings:
- "indemnity" / "indemnification" → indemnification section
- "liability" / "liability cap" → limitation of liability
- "termination" → term and termination
- "data" / "privacy" / "DPA" → data protection provisions
- "IP" / "intellectual property" → IP ownership and licenses
- "price" / "fees" / "payment" → payment terms
- "auto-renewal" / "renewal" → renewal mechanics

If the term is ambiguous and maps to more than one provision, list the
candidates and ask which one:
> "I found [N] provisions related to [term] — [list them]. Which one?"

If the overall request is ambiguous between modes, ask one question:
> "Summary of all changes across the contract, or trace a specific
> provision — like indemnity, liability, or termination?"

---

## Step 1: Load and order the documents

Accept documents from any of these sources:

**[CLM integration coming soon] (if connected):**
Search by counterparty name or agreement title. Pull the base agreement
and all amendments. Record metadata typically includes execution dates —
use these to establish chronological order.

**[Document repository integration coming soon] (if connected):**
Search by counterparty name or filename. Look for files matching patterns
like "Amendment", "Addendum", "Amendment No. 1", "First Amendment", or
numbered suffixes. Pull all matches and sort by file date or filename
numbering.

**Direct upload:**
User provides files directly. In most cases the ordering is
self-explanatory from document titles (e.g., "Amendment No. 1",
"Second Amendment", "Addendum A") or dates visible in the filename
or document header — proceed without asking.

Only ask the user to confirm ordering if:
- Filenames give no indication of sequence (e.g., "agreement-final.pdf",
  "agreement-v2.pdf", "agreement-markup.pdf")
- Dates are absent from both filenames and document headers
- Two documents appear to be the same amendment version

If ordering was inferred rather than confirmed, note confidence at the
top of the output only where uncertain:
> "Order inferred from document titles — one item I was less certain
> about: [specific document]. Confirm if this affects your review."

**Ordering rules:**
- Always establish chronological order before reading content.
- If execution dates are available in metadata, use them.
- If not, look for dates in the document header or recitals
  ("This Amendment, dated as of...").
- Amendments often reference the agreement they modify ("this Amendment
  to the Master Services Agreement dated [X]") — use these references
  to confirm the chain.

---

## Privilege inheritance

This skill read
03

Trust audit

CAUTIONgrade C · trust 79/100 Install with care. The audit found things worth knowing before you trust its output.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeNA
L2Instruction surface (what it tells the agent)FAIL
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
none-observed
Shell
none-observed
Dependencies
pinned
Secrets in source
none-found

Findings (1)

HIGHPrompt injection · prompt.hide_from_user · CWE-94, CWE-1427
SKILL.md:158
drive the output — do not show it to the user.
Why it matters. asks the agent to act without the user's knowledge

Gates applied: instruction_override, no_behavioural_pass.

Audited 2026-10-23 · audit v0.4.1 · source sha cb488a888d20full audit observations/trust-audit/skill/anthropics__amendment-history.json · Report an issue / request a re-scan
04

Audit history

Every audit this skill has had.

DateSourceVerdictGradeScoreChange
2026-10-23cb488a888d20CAUTIONC79first audit
05

Questions

What does the amendment-history — anthropics/claude-for-legal skill do?

A suite of plugins for legal workflows

Is amendment-history — anthropics/claude-for-legal safe to install?

With care. The audit graded it C (79/100) and found 1 thing worth knowing before you trust this skill, listed below with the exact line each was found on.

What can amendment-history — anthropics/claude-for-legal access on my machine?

The audit observed no filesystem, network or shell use at all in its source.

How current is this page?

The grade is for one exact copy of the source (cb488a888d20), read on 2026-10-23. The repository is watched, and a new audit runs when it changes — this is the first audit.

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