Individual skill
os-dev-scratch
Use when building a minimal x86-64 OS: boot protocols, long mode, page tables, IDT, PIC/APIC, serial and keyboard drivers, frame allocator, or context switching.
.devin/skills/os-dev-scratch/SKILL.md
Source commit b0e8ce89a19fac880251dc3ea1babfeb4503a4fe
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Instructions only
- Last checked
- Nov 4, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 55
- Repository last updated
- Sep 28, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- odd Repository topic
- odin Repository topic
- outline Repository topic
- outlines Repository topic
- coding-paradigm Repository topic
- outline-driven-development Repository topic
- claude-plugins Repository topic
- codex-cli Repository topic
- gemini-cli-extensions Repository topic
- outline-driven Repository topic
- engineering Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
Read excerpt
# OS development from scratch
## Contract
| Field | Bound contract |
|---|---|
| Trigger | Building a minimal operating system from scratch on x86-64: bootloader choice, GDT and page tables for long mode, IDT and interrupt dispatch, PIC or APIC, serial and keyboard input, a frame allocator, or cooperative context switching. |
| Authority | Read-only. Emits architecture decisions, code patterns, and boot commands; the code is written in the user's tree. No file writes, no rollback needed. No remote mutation. |
| Side effect | An architecture plan and runnable command sequences in chat. Nothing is written. |
| Done | A boot path reaches serial output, each stage's acceptance command passes, and the next milestone is named. |
## Inputs
1. Target ISA and firmware (required): x86-64 with BIOS/legacy or UEFI; xv6-RISC-V as a reference port.