Tw Legal RAG
aa0101181514/tw-legal-rag
Retrieve real Taiwan court judgments with verifiable citations before answering any question about Taiwan law or case law.
Query 360+ years of US case law via the Harvard Caselaw Access Project
Install Caselaw Access API
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install wentorai/research-plugins caselaw-access-api --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .claude/skills/caselaw-access-api && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .claude/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-apiType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install wentorai/research-plugins caselaw-access-api --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .agents/skills/caselaw-access-api && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .agents/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install wentorai/research-plugins caselaw-access-api --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .cursor/skills/caselaw-access-api && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .cursor/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/wentorai/research-plugins.git --path skills/domains/law/caselaw-access-api--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install wentorai/research-plugins caselaw-access-api --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .gemini/skills/caselaw-access-api && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .gemini/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install wentorai/research-plugins caselaw-access-apiInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .github/skills/caselaw-access-api && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .github/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add wentorai/research-plugins --skill caselaw-access-api -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install wentorai/research-plugins caselaw-access-api --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/wentorai/research-plugins.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/domains/law/caselaw-access-api .opencode/skills/caselaw-access-api && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "caselaw-access-api" agent skill from https://github.com/wentorai/research-plugins/tree/main/skills/domains/law/caselaw-access-api into .opencode/skills/caselaw-access-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caselaw-access-api", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
caselaw-access-api- GitHub stars
- 298
- Used in
- 1 other repo
- Token cost
- ~1.1k tokens
- SKILL.md length
- 194 words
- Files
- 1
- Skills in repo
- 405
- Repo updated
- First seen
- Licence
- MIT
At a glance
Query 360+ years of US case law via the Harvard Caselaw Access Project
- Tasks that involve Legal research
- SKILL.md covers Overview, API Endpoints, Python Usage and Bulk Data Access, plus 3 more sections
- Calls curl; reaches api.case.law and case.law
What it does
Caselaw Access API is an agent skill from wentorai/research-plugins. Query 360+ years of US case law via the Harvard Caselaw Access Project
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Legal & Compliance, covering Legal research. The repository describes itself as: 350+ academic research skills, MCP configs, and plugins for Research-Claw and AI agents. The licence is MIT.
When your agent uses it
- Tasks that involve Legal research
Example prompts
- “/caselaw-access-api”
Requirements
- Python 3
- A credential in YOUR_API_KEY
- A credential in YOUR_TOKEN
What it can do on your machine
Read from SKILL.md and the folder at commit bf44b3c. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
curl
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
api.case.lawcase.law
Also links to:
lil.law.harvard.edu
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Caselaw Access API loads about 1.1k tokens when it runs. Until then it costs about 22 tokens; SKILL.md has 194 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from wentorai/research-plugins at commit bf44b3c, republished under its MIT licence (© wentorai). 194 words, ~1,133 tokens.
Download SKILL.mdSave it as
.claude/skills/caselaw-access-api/SKILL.md (or your agent's skills folder).- name
- caselaw-access-api
- description
- Query 360+ years of US case law via the Harvard Caselaw Access Project
Caselaw Access Project API
Overview
The Caselaw Access Project (CAP) by Harvard Law School provides free access to 6.9 million US court opinions spanning 360+ years. The REST API enables searching, filtering, and downloading full-text case opinions from all federal and state courts. No authentication required for metadata; API key (free registration) required for full text of post-1923 cases.
API Endpoints
Base URL
https://api.case.law/v1/Cases
# Search cases by keyword
curl "https://api.case.law/v1/cases/?search=free+speech&decision_date_min=2020-01-01"
# Get a specific case by ID
curl "https://api.case.law/v1/cases/12345678/"
# Filter by jurisdiction and court
curl "https://api.case.law/v1/cases/?jurisdiction=us&court=us-sup-ct&search=miranda+rights"
# Filter by date range
curl "https://api.case.law/v1/cases/?decision_date_min=2015-01-01&decision_date_max=2025-12-31"
# Get full text (requires API key for post-1923)
curl -H "Authorization: Token YOUR_API_KEY" \
"https://api.case.law/v1/cases/12345678/?full_case=true"Query Parameters
| Parameter | Description | Example |
|---|---|---|
search | Full-text search | search=due+process |
jurisdiction | Filter by jurisdiction slug | jurisdiction=cal (California) |
court | Filter by court slug | court=us-sup-ct |
decision_date_min | Earliest date | decision_date_min=2020-01-01 |
decision_date_max | Latest date | decision_date_max=2025-12-31 |
cite | Search by citation | cite=410+U.S.+113 |
name_abbreviation | Case name | name_abbreviation=Roe+v.+Wade |
ordering | Sort results | ordering=-decision_date |
page_size | Results per page (max 100) | page_size=50 |
full_case | Include full text | full_case=true |
Courts and Jurisdictions
# List all courts
curl "https://api.case.law/v1/courts/"
# List all jurisdictions
curl "https://api.case.law/v1/jurisdictions/"
# List all reporters (case report series)
curl "https://api.case.law/v1/reporters/"Python Usage
import requests
BASE_URL = "https://api.case.law/v1"
def search_cases(query: str, jurisdiction: str = None,
court: str = None, max_results: int = 20) -> list:
"""Search US case law."""
params = {"search": query, "page_size": min(max_results, 100)}
if jurisdiction:
params["jurisdiction"] = jurisdiction
if court:
params["court"] = court
resp = requests.get(f"{BASE_URL}/cases/", params=params)
resp.raise_for_status()
data = resp.json()
cases = []
for case in data.get("results", []):
cases.append({
"id": case["id"],
"name": case["name_abbreviation"],
"citation": case["citations"][0]["cite"] if case.get("citations") else None,
"court": case["court"]["name"],
"date": case["decision_date"],
"url": case["frontend_url"]
})
return cases
# Search Supreme Court cases
results = search_cases("fourth amendment", court="us-sup-ct")
for case in results:
print(f"{case['citation']}: {case['name']} ({case['date']})")Bulk Data Access
For large-scale research, download bulk datasets instead of querying the API:
# Bulk data available at:
# https://case.law/bulk/download/
# Formats: JSON (full case data) or text-only
# Organized by jurisdiction and reporterKey Jurisdictions
| Slug | Jurisdiction | Cases |
|---|---|---|
us | Federal (all) | ~1.5M |
us-sup-ct | US Supreme Court | ~65K |
cal | California | ~500K |
ny | New York | ~600K |
tex | Texas | ~300K |
ill | Illinois | ~250K |
Authentication
1. Register at https://case.law/user/register/
2. Get API token from your account page
3. Include in requests: Authorization: Token YOUR_TOKENFree accounts get full text for pre-1923 cases. Post-1923 full text requires an API token (still free).
References
© wentorai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/domains/law/caselaw-access-api of wentorai/research-plugins.
Open the folder on GitHubat commit bf44b3c
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in wentorai/research-plugins, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Caselaw Access API next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Caselaw Access API this skillwentorai/research-plugins | 298 | 1 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Tw Legal RAGaa0101181514/tw-legal-rag | 328 | — | ~580 | Automated safety check: Pass | Custom licence | |
| Design Award SearchSeanJ1ang/design-judge-skills | 712 | — | ~3k | Automated safety check: Pass | Apache-2.0 | |
| China Lawyer AnalystCSlawyer1985/china-lawyer-analyst | 196 | — | ~3.3k | Automated safety check: Pass | None | |
| Billing And Litigation BudgetTHUYRan/Legal-Skills-Chinese | 874 | — | ~5k | Automated safety check: Pass | None | |
| Legal Issue ResearchGolden2002/legal-research-skill | 156 | — | ~6.8k | Automated safety check: Pass | MIT |
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Find and verify award-winning designs in the same or adjacent functional category through eight explicit relevance dimensions: problem and user, core function, sensing technology, intervention…
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通过中国法律视角分析事件，运用成文法解释、指导案例参照、请求权基础分析等方法， 理解权利义务、评估责任风险、识别法律依据并推荐合规策略。
Billing And Litigation Budget
THUYRan/Legal-Skills-Chinese
A skill your agent uses when the user needs to track or manage attorney hours, expert fees, and investigation costs; control litigation spend; or prepare timesheets or expense statements for clients.
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Golden2002/legal-research-skill
中国法律全领域系统性检索专家. An agent skill from Golden2002/legal-research-skill.
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Related
Categories
Questions about Caselaw Access API
What does Caselaw Access API do?
Query 360+ years of US case law via the Harvard Caselaw Access Project. Caselaw Access API is an agent skill from wentorai/research-plugins.
When should I use Caselaw Access API?
Caselaw Access API fits situations like: tasks that involve Legal research.
How do I install Caselaw Access API in Claude Code?
Run `npx skills add wentorai/research-plugins --skill caselaw-access-api -a claude-code`. Or copy the skill folder (skills/domains/law/caselaw-access-api in wentorai/research-plugins) into .claude/skills/caselaw-access-api in your project. Claude Code loads it when a task matches its description.
How do I install Caselaw Access API in Codex?
Run `npx skills add wentorai/research-plugins --skill caselaw-access-api -a codex`. Or copy the skill folder (skills/domains/law/caselaw-access-api in wentorai/research-plugins) into .agents/skills/caselaw-access-api in your project. Codex loads it when a task matches its description.
Can I use Caselaw Access API in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add wentorai/research-plugins --skill caselaw-access-api -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/caselaw-access-api, .gemini/skills/caselaw-access-api, .github/skills/caselaw-access-api and .opencode/skills/caselaw-access-api in your project.
What does Caselaw Access API need to run?
Going by SKILL.md and its folder, Caselaw Access API needs the command-line tools its instructions call (curl). Our summary lists: Python 3; A credential in YOUR_API_KEY; A credential in YOUR_TOKEN.
Does Caselaw Access API access the network?
SKILL.md names 3 domains. In commands or code: api.case.law and case.law; the agent is likely to contact these when it follows the instructions. As links in the text: lil.law.harvard.edu. This is read from the text; nothing was executed.
Is Caselaw Access API safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Caselaw Access API use?
Caselaw Access API is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Caselaw Access API use?
About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Caselaw Access API?
Skills that share tags, products or a category with Caselaw Access API: Tw Legal RAG (aa0101181514/tw-legal-rag, 328 stars), Design Award Search (SeanJ1ang/design-judge-skills, 712 stars), China Lawyer Analyst (CSlawyer1985/china-lawyer-analyst, 196 stars) and Billing And Litigation Budget (THUYRan/Legal-Skills-Chinese, 874 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Caselaw Access API?
wentorai (a GitHub user) maintains it in wentorai/research-plugins, which has 298 GitHub stars. The repository holds 405 skills in this directory. The repository was last updated on June 19, 2026.
Source: wentorai/research-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.