codechecker

import { completeText, extractJson } from "../llm";
import type { BuildPlan, Patch } from "../types";

export class Coder {
  constructor(private readonly model: any) {}

  async run(input: {
    plan: BuildPlan;
    snapshot: string;
    issues: string[];
    memorySummary: string;
  }): Promise<Patch[]> {
    const prompt = [
      "You are the Coder agent for Codechecker Forge.",
      "Return JSON only. No markdown, no commentary.",
      "Generate minimal diff-based patches only.",
      "Do not rewrite whole files unless necessary.",
      "",
      "Current plan:",
      JSON.stringify(input.plan, null, 2),
      "",
      "Workspace snapshot:",
      input.snapshot,
      "",
      "Known issues:",
      input.issues.length ? input.issues.join("\n") : "(none)",
      "",
      "Relevant memories:",
      input.memorySummary || "(none)",
      "",
      "Return exactly this JSON shape:",
      `{ "patches": [ { "file": "src/index.ts", "operation": "overwrite", "content": "..." } ] }`
    ].join("\n");

    const raw = await completeText(this.model, prompt, 3200, 0.15);
    const parsed = extractJson<{ patches: Patch[] }>(raw);
    return Array.isArray(parsed.patches) ? parsed.patches : [];
  }
}