1# Chapter 13: tools, the helpers backstage
2
3Nothing in this folder is part of the site. These are the things that help
4build it, run it on a laptop, and decide how it should behave. Two of them
5are small shell scripts with one job each; the third, `eval/`, is a whole
6program and gets the next chapter.
7
8> **Aside.** Why does a dev server need a script to report its own exits?
9> Because wrangler's wrapper exits with status 0 when the runtime under it
10> is killed (measured 2026-10-02), and pitchfork, which supervises it, only
11> restarts something that failed. So `wrangler-dev` treats any exit nobody
12> asked for as a failure, and pitchfork brings it back.
13
14## For the people who maintain it
15
16| Path | What |
17| --- | --- |
18| [eval/](eval/) | Picks the LLM, and checks the eight questions Jev is asked first. Chapter 14. |
19| [wrangler-dev](wrangler-dev) | The Worker under `wrangler dev`, for pitchfork: it reports an exit nobody asked for as a failure, so pitchfork restarts it. |
20| [devshell-root](devshell-root) | Registers the owner's devshell as a nix garbage-collection root, so a collection does not make the next `nix develop` rebuild pitchfork. From `~/aifleet`. |
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