Isaac Lu Yang

Open source — Legal technology

Tools for the unbillable hours.

Legal tech I build solo and release in the open — deterministic where precision is non-negotiable, grounded in the source wherever AI is involved.

● Released AGPL-3.0 Python · FastAPI · python-docx

Bundle of Authorities Autobot

Reads the footnotes of a court submission draft and compiles a formatted Bundle of Authorities — index, cover pages and pinpoint highlights — ready for filing.

  • Resolves ibid., n X and short-name cross-references back to the original citation
  • Sorts authorities into seven tiers by jurisdiction and type, then strictly alphabetically
  • Verifies against official sources — never invents text for paywalled authorities
  • Native .docx output; runs entirely locally, so client documents never leave the machine
View on GitHub ↗ Read the docs ↗
Illustrative index · sample authorities
○ In development

Keystone

Self-updating Contracts, Agreements and Notes

Regulatory resilience for contract templates. Keystone maps each clause to the living law through a knowledge graph, then flags direct and ripple-effect impacts when new gazettes and rulings land — every flag grounded in verbatim text.

For
Lawyers maintaining contract templates — the unbillable work
Watches
New gazettes and court rulings
Flags
Direct and ripple-effect impacts, with verbatim grounding
◐ Releasing soon

UYB Use Your Brain

Claude skill · ChatGPT skill

An edtech skill that prepares law students against automation bias. It coaches Singapore legal research in seven steps: the AI searches, fetches and extracts; the student keeps the judgement calls.

For
Law students writing memos, moot briefs and research papers
Runs in
Claude and ChatGPT, as a skill
Archived
The earlier localhost web app

Also built — not open source

Factsmith

AI-assisted research over family-law judgments — divorce, custody and the division of matrimonial assets — built for and deployed at MinLaw’s Legal Aid Bureau. Human-in-the-loop, with verifiable outputs.

Presented at ICAIL 2025

Ten O’Clock Postman

My email-organising product for Gmail and Outlook. It reads only metadata — sender, subject, date and folder — proposes where messages should go with a reason for each, and moves nothing until you approve. Every change can be undone.

tenoclockpostman.com ↗