/**

* Bug-fixing sweep prompt module for scripts/study-crates.ts.

*

* Pass it with:

* npx tsx scripts/study-crates.ts --prompt-file scripts/fix-bugs.config.example.ts

*

* The module's default export is a function `(ctx: FileCtx) => string` that

* returns the prompt for one file. This gives you full programmatic control:

* branch on the crate, the path, the file name, inject extra instructions for

* specific subsystems, etc. The `model` export pins the model for the sweep;

* an explicit --model flag overrides it.

*

* FileCtx fields available:

* file repo-relative POSIX path, e.g. "crates/socket-patch-core/src/lib.rs"

* abspath absolute path on disk

* crate crate dir name, e.g. "socket-patch-core"

* name basename, e.g. "lib.rs"

* stem basename without extension, e.g. "lib"

* relInCrate path within the crate's src dir, e.g. "api/client.rs"

*/

import type { FileCtx } from "./study-crates.ts";

export const model = "claude-fable-5";

export default function render(ctx: FileCtx): string {

const base = [

`Review ${ctx.file} in the ${ctx.crate} crate for real production bugs.`,

`Read it line by line. Treat every suspected bug as unconfirmed until you`,

`write a regression test that fails on the current code; then apply the`,

`minimal fix and make the test pass.`,

`Do not refactor, clean up, or restructure beyond what each fix requires,`,

`and never weaken an existing test to get green.`,

`If the file turns out to be clean, say so plainly and stop — do not invent findings.`,

];

// Path-specific emphasis: the patch engine and crawlers carry the most

// invariants.

if (ctx.relInCrate.startsWith("patch/")) {

base.push(

`This file is part of the patch engine — pay special attention to`,

`filesystem safety, atomicity, and rollback correctness.`,

);

} else if (ctx.relInCrate.startsWith("crawlers/")) {

base.push(

`This is a package-manager crawler — note the on-disk layout assumptions`,

`it makes and how it handles missing or malformed package metadata.`,

);

}

base.push(

`Finish by running the affected tests, then end with a concise 3-6 bullet`,

`summary: bugs found (or "clean"), fixes applied, and test results.`,

);

return base.join(" ");

}