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§ Guide

GitHub GitLab And Source Code As Evidence

This guide explains how source code, particularly from Git platforms, provides critical evidence in UK litigation and investigations.

Ref · E-D · 2026 · §LIBClass · ConfidentialJuris · England & WalesStatus · Active

Guide · 17 pages · 20 min read · Published 2026-08-30

Written specifically for UK legal practitioners navigating intellectual property, corporate, and employment disputes, this technical overview addresses the challenge of establishing the provenance, authenticity, and timing of software source code in litigation. It breaks down Git repository anatomy, including commits, branches, and cryptographic hashes, demonstrating how development history dates every line of code while explaining why local author fields and timestamps are inherently settable. To verify repository history against forged dates and rewritten pasts, the text details platform-side records available within GitHub and GitLab, such as pull requests, code reviews, issues, and system logs. It systematically covers exfiltration investigations involving departing developers, repository clones, and forks, alongside code similarity analysis used in copying disputes. Expanding beyond central repositories, it maps the wider source architecture across CI/CD deploys, registries, artifacts, local backups, and recoverable devices. Finally, it equips legal teams with practical interrogatories, suggested preservation letter wording, red flag checklists, worked examples, and clear guidance on when to instruct digital forensic experts.

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Published by Computer Forensics Lab on 2026-08-30. Original material of the practice, free to read, cite and download. See every guide's author and source.

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GitHub GitLab And Source Code As Evidence

SOURCECODEEVIDENCE · A GUIDE FOR UK LAWYERS GitHub, GitLab and Source Code as Evidence Commits, Clones and the Development History That Dates Every Line COMPUTER FORENSICS LAB

§ ABOUT THE AUTHOR PREPARED BY COMPUTER FORENSICS LAB E-DISCOVERY TEAM

§ CONTENTS In this guide 01 Executive summary 02 The problem in plain English: the manuscript that dates itself 03 Git anatomy: commits, branches, hashes and what they prove 04 Platform evidence: pull requests, reviews, issues and logs 05 Authenticating history: forged dates and rewritten pasts 06 Exfiltration: clones, forks and the departing developer 07 Copying disputes: similarity analysis and provenance 08 Source architecture: where else the evidence lives 09 Worked examples 10 Common mistakes and technical limitations 11 Questions to ask · Suggested wording 12 Checklist and red flags · When to involve a digital forensic expert 13 Frequently asked questions 14 Glossary · References · Disclaimer · How a specialist laboratory can assist

§ 01 · ORIENTATION Executive summary THE HEADLINE POINT: GITDATESEVERYLINEANDNAMESEVERYAUTHOR, BUTBOTH FIELDS ARE SET TABLE: PLATFORM - SIDERECORDSARETHEANCHORTHATMAKES REPOSITORYHISTORYTRUSTWORTHY

§ 02 · FIRST PRINCIPLES The problem in plain English: the manuscript that dates itself

§ 03 · THEREPOSITORY Git anatomy: commits, branches, hashes and what they prove

§ 04 · THEPLATFORMLAYER Platform evidence: pull requests, reviews, issues and logs

§ 05 · TRUST, VERIFIED Authenticating history: forged dates and rewritten pasts

§ 06 · TAKEN Exfiltration: clones, forks and the departing developer

§ 07 · COPIED Copying disputes: similarity analysis and provenance

§ 08 · THEWIDERMAP Source architecture: where else the evidence lives EVIDENCE CLONES / OLD PLATFORM CI/CD & REGISTRIES & DELETED / REPO DEPLOYS ARTEFACTS RECOVERABLE LOCAL BACKUPS / FORKS DEVICES

§ 09 · IN THE WILD Worked examples EXAMPLE1 · THECOMMITFROMTHEFUTURE ' SPAST EXAMPLE2 · THETOKENTHATOUTLIVEDTHEJOB EXAMPLE3 · THETYPOTHATTRAVELLED

§ 10 · WHEREITGOESWRONG Common mistakes and technical limitations Common mistakes Technical limitations

§ 11 · INTERROGATORIES & DRAFTING AIDS Questions to ask · Suggested wording Ask your client Ask your opponent Ask your e Discovery / forensic provider SUGGESTED WORDING · SOURCE - CODELIMBFORTHEPRESER VAT I ON LETTER

§ 12 · QUICK CONTROL Checklist and red flags · When to involve a digital forensic expert The source-code checklist Red flags When to involve a digital forensic expert

§ 13 · COMMON QUESTIONS Frequently asked questions Can git really prove when code was written? A developer says someone else committed under their name. Possible? The opponent deleted the repository. Is the history gone? How much code similarity is enough to prove copying? Our code is commercially sensitive. Must we hand it to the opponent to fight a copying case? Does AI-generated code change any of this?

§ 14 · REFERENCE Glossary Sources and authoritative references DISCLAIMER

§ HOW A SPECIALIST LABORATORY CAN ASSIST Working with Computer Forensics Lab Speak to a forensic examiner, not a salesperson. INSTRUCTTHELAB NEWENQUIRIESEMAILE - DISCOVERY

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