The Developers Guide provides information on how to hack on MINIX 3. If you're new to MINIX 3 development, you should start here.

1. Introduction
   1. Cross-compiling MINIX 3
   2. Compiling MINIX 3
2. Developing MINIX 3
   1. Overview of MINIX 3 architecture
   2. Programming in MINIX 3
   3. Tracking Current
   4. Test Suite
3. Contributing
   1. Using Git
   2. Coding Style
   3. Commit Message Format
   4. Ideas for volunteers to work on

1. Live update and rerandomization
2. Device Driver Programming in MINIX 3
3. Debugging tips - Serial out, GDB
4. Adding a new Kernel Call
5. Performance measurement
6. Using Eclipse in MINIX 3 with Remote Explorer
7. Using GCOV to gather service code coverage info

1. Micro-kernel
   1. Overview of MINIX 3 micro-kernel
   2. Kernel system calls API
   3. Memory grants
   4. Message passing
2. Drivers
   1. Overview of MINIX 3 drivers
   2. The Block Device protocol
   3. The Data Link (inet-ethernet) protocol
   4. The I2C Device Protocol
   5. The RTC Protocol
3. Servers
   1. Overview of MINIX 3 servers
   2. VM Internals
   3. VFS Internals
4. Userland
   1. Overview of Minix userland
   2. Guide to Porting Software
   3. Minix-specific
      1. Useful tools specific to MINIX 3
   4. NetBSD
      1. Porting NetBSD Userland
      2. Step by Step porting Guide for NetBSD userland
   5. pkgsrc
      1. Pkgsrc Guide
      2. Bootstrapping and bulk-building with Pkgsrc
      3. Syncing the MINIX 3 pkgsrc Repository with Upstream
      4. Pkgsrc Upstreaming
      5. Pkgsrc on ARM (not yet working)
5. Machine-dependent
   1. i386
      1. X86 CPU Reference Manuals
   2. ARM
      1. Building MINIX 3 for ARM
      2. Test Suite
      3. Testing Minix/arm
6. Miscellaneous
   1. Early Boot - technical details of kernel getting loaded and its memory layout
   2. From power-on to the login prompt...
   3. Magic debugging keys

As discussed on minix3, here is the old developers guide table of contents:

1. Programming
   1. Useful tools specific to MINIX 3
   2. Device Driver Programming in MINIX 3
   3. I2C Device Driver Programming in MINIX 3
   4. I2C /dev Interface
   5. Adding support for new BeagleBone Capes
   6. Using Eclipse in MINIX3 with Remote Explorer
   7. POSIX and MINIX 3
   8. Programming in MINIX 3
   9. X86 CPU Reference Manuals
   10. Performance measurement
   11. Adding a new Kernel Call
   12. Debugging tips - Serial out, GDB
   13. Using GCOV to gather servers code coverage info
2. Rebuilding the System
   1. Tracking Current
   2. Rebuilding the System
   3. Crosscompile MINIX
   4. Building MINIX for ARM
   5. Test Suite
   6. Testing Minix/arm
3. API Documentation
   1. The MINIX 3 API
   2. The Kernel API
   3. The VFS-FS protocol
   4. The Data Link (inet-ethernet) protocol
   5. The Block Device protocol
   6. The I2C Device Protocol
   7. The RTC Protocol
   8. The DataStore API
   9. The System Event Framework (SEF)
   10. The VTreeFS library
   11. VM calls
4. Internals
   1. From power-on to the login prompt...
   2. Early Boot - technical details of kernel getting loaded and its memory layout
   3. VM Internals
   4. VFS Internals
   5. I2C Internals
   6. EDID Reading
   7. Userspace scheduling
5. Writing or Porting Software
   1. Guide to Porting Software
   2. Porting NetBSD Userland
   3. Pkgsrc Guide
   4. Bootstrapping and bulk-building with Pkgsrc
   5. Syncing the Minix pkgsrc Repository with Upstream
   6. Pkgsrc Upstreaming
6. Source Code
   1. Using Git
   2. Coding Style
   3. Commit Message Format
7. TODO
   1. Ideas for volunteers to work on