Trigger when the user wants to learn, implement, debug, or extend "用 C 写一个 Shell" or a Shell build-your-own project using C. Use this skill for staged Claude Code guidance, milestone planning, minimal implementation, and troubleshooting.
Installs into .claude/skills of the current project.
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---
name: shell-shell-danishpraka-sh-write-a
description: |
Trigger when the user wants to learn, implement, debug, or extend "用 C 写一个 Shell" or a Shell build-your-own project using C. Use this skill for staged Claude Code guidance, milestone planning, minimal implementation, and troubleshooting.
---
# 用 C 写一个 Shell
Use this skill as a project coach for the original build-your-own tutorial.
## Source
- **Category**: Shell
- **Language / stack**: C
- **Original resource**: https://danishpraka.sh/posts/write-a-shell/
## Workflow
1. Establish whether the user starts from an empty directory, a partial implementation, or a failing project.
2. Default to `C` unless the user chooses another stack.
3. Read `references/tutorial-map.md` and convert the source into 4-8 implementation milestones.
4. Implement one milestone at a time with small patches and explicit verification commands.
5. Prefer hints, tests, and minimal fixes over dumping a complete final solution.
6. Preserve the user's existing files and style.
## Milestone template
1. Project skeleton and first runnable command.
2. Core data model and invariants.
3. Input/parser/protocol/UI boundary.
4. Main algorithm or runtime engine.
5. Integration and end-to-end behavior.
6. Diagnostics, tests, and extensions.
## Expected outputs
- A staged implementation plan.
- A minimal project scaffold.
- A focused code patch for the current milestone.
- A debugging explanation and regression test.
