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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.
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请帮我安装 askskill 上的 "amendment-history" 技能： 1. 下载 https://raw.githubusercontent.com/anthropics/claude-for-legal/main/commercial-legal/skills/amendment-history/SKILL.md 2. 保存为 ~/.claude/skills/amendment-history/SKILL.md 3. 装好后重载技能，告诉我可以用了
Loads a base agreement and all amendments, then either summarizes what changed over time or traces a specific provision to its current controlling language.
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.
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.
Run the workflow below. Follow it fully.
Offer follow-ups after output:
/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. 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.
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.
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:
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?"
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):
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Manage matter workspaces — create, list, switch, close, or detach the active matter. Use in multi-client private practice to keep one client's context separate from another, or when a substantive skill needs to know which matter it's working in.
Draft a DMCA takedown notice, triage one you received, or draft a §512(g) counter-notice. Use when asserting copyright through a §512(c)(3) takedown with the fair-use and perjury gates, when an incoming takedown needs triage into comply / counter / engage / ignore options, or when drafting a §512(g)(3) counter-notice with the consent-to-federal-jurisdiction gate.
Search watched registries for community legal skills, showing matches with descriptions and offering to show the full SKILL.md before install. Use when the user says "browse", "search skills", "find a skill for", "what's out there for", or wants to add a new registry to the watchlist.
Case status summary by audience — client-facing (plain language), internal (for the professor), or court-ready (formal caption format per local rules). Same facts, different framing and depth. Use when a student needs to update the client, brief the professor, or prepare a court status report.
Draft a brief section in house style, consistent with the case theory — every fact cited, every case checked, every argument tied to the theory. Use when the user says "draft the [section]", "write the statement of facts", "argument section on [issue]", or needs a first draft of a brief section.
Brief a case in your preferred format. In drill-me mode, makes the student state the holding first. Use when the user says "brief [case]", "what's the holding in", "case brief", or pastes a case.