SLOPSHOPPER

model-router

Routes Agent tool calls: simple chores to Haiku, heavy work stays on Sonnet/Opus.

newbandguard
v0.1.0MITupdated 2026-10-25kenhuangus/claude-code-mods-pack/mods/model-router
A shopper browsing a rack in a slop shop
Preview · a replayed session in a sandbox
claude · ~/work/app · model-router
› fix the failing auth test and add an audit log call ⏺ Read(src/auth.ts) ⎿ Read 6 lines ⏺ Update(src/auth.ts) ⎿ Added 2 lines, removed 1 line ⏺ Bash(bun test) ⎿ 3 pass, 1 fail ● Done. refresh now rejects expired claims and logs an audit event. ✻ Worked for 42s · done 4:20 PM ROUTER haiku:0 premium:0 ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── › ? for shortcuts

Draws

Band
ROUTER haiku:0 premium:0
README

model-router

Routes Agent tool calls: simple chores to Haiku, heavy work stays on Sonnet/Opus.

Install

claude plugin marketplace add kenhuangus/claude-code-mods-pack
claude plugin install model-router@kenhuang-mods
Source 2 files
hooks/model-router.mjs 35 lines
1const STATS = { plugin: "model-router", key: "stats" };
2const SIMPLE = /\b(unit test|docstring|comment|rename|typo|format|lint|changelog|readme)\b/i;
3export function pickModel(prompt, current) {
4  if (SIMPLE.test(String(prompt ?? ""))) return { model: "haiku", tier: "haiku" };
5  return { model: current || "sonnet", tier: "premium" };
6}
7export function register(on) {
8  on("session.start", async ($, e, next) => {
9    const r = await next(e);
10    await $.state.set(STATS, { routedHaiku: 0, routedPremium: 0 });
11    return r;
12  });
13  on("tool.call", { tool: "Agent" }, async ($, e, next) => {
14    const prompt = e.prompt ?? e.description ?? e.input ?? "";
15    const choice = pickModel(prompt, e.model);
16    const { value: stats } = await $.state.get(STATS);
17    if (choice.tier === "haiku") {
18      await $.state.set(STATS, { routedHaiku: (stats?.routedHaiku ?? 0) + 1, routedPremium: stats?.routedPremium ?? 0, last: "haiku" });
19      return next({ ...e, model: "haiku" });
20    }
21    await $.state.set(STATS, { routedHaiku: stats?.routedHaiku ?? 0, routedPremium: (stats?.routedPremium ?? 0) + 1, last: "premium" });
22    return next(e);
23  });
24  on("ui.render", { component: "AbovePrompt" }, async ($, e, next) => {
25    if (e.props?.hasSurvey) return next(e);
26    const { value: stats } = await $.state.get(STATS);
27    if (!stats) return next(e);
28    const { Box, Text } = $.ui.resolve(e);
29    return Box({
30      paddingX: 1,
31      children: [Text({ dimColor: true, children: `ROUTER haiku:${stats.routedHaiku} premium:${stats.routedPremium}` })],
32    });
33  });
34}
35
types/index.d.ts 8 lines
1declare module "claude-code" {
2  interface PluginState {
3    "model-router": {
4      stats: { routedHaiku: number; routedPremium: number; last?: string };
5    };
6  }
7}
8