The following links are of interest to programmers who want to modify or enhance Fossil itself. Ordinary users can safely ignore this information.

• How To Compile And Install Fossil
• Theming Fossil
• Adding New Commands To Fossil
• The Fossil Build Process
• A Technical Overview of Fossil
• Contributing Code Or Enhancements To The Fossil Project
• Fossil Artifact File Format
• The Sync Protocol
• Coding Style Guidelines
• Pre-checkin Checklist
• Release Checklist
• The "backoffice" subsystem