autoresearch: vitest-speed

---
name: pi-autoresearch-loop
description: Autonomous experiment loop for pi that continuously tries optimizations, measures results, and keeps what works
triggers:
  - autoresearch
  - autonomous experiment loop
  - optimize automatically
  - run experiment loop
  - continuous optimization
  - benchmark and improve
  - start autoresearch session
  - keep what works discard what doesnt
---

# pi-autoresearch — Autonomous Experiment Loop

> Skill by [ara.so](https://ara.so) — Daily 2026 Skills collection

Autonomous experiment loop extension for [pi](https://github.com/antiwork/pi). Continuously proposes changes, benchmarks them, commits wins, reverts losses, and repeats — forever. Works for any measurable target: test speed, bundle size, build time, LLM training loss, Lighthouse scores.

---

## Installation

```bash
pi install https://github.com/davebcn87/pi-autoresearch

Manual install:

cp -r extensions/pi-autoresearch ~/.pi/agent/extensions/
cp -r skills/autoresearch-create ~/.pi/agent/skills/

Then /reload in pi.

Quick Start

/skill:autoresearch-create

The agent will:
1. Ask about your goal, command, metric, and files in scope (or infer from context)
2. Create a branch
3. Write autoresearch.md and autoresearch.sh
4. Run the baseline
5. Start looping immediately — no further input needed

Core Concepts

Two-file persistence model

Every session is fully recoverable from two files:

A fresh agent with zero memory can read these two files and continue exactly where the previous session left off.

Session files written by the skill

Extension Tools

init_experiment

One-time session configuration. Call once at session start.

await init_experiment({
  name: "vitest-speed",
  metric: "seconds",
  unit: "s",
  direction: "lower", // "lower" | "higher"
});

run_experiment

Runs any shell command, times wall-clock duration, captures stdout/stderr.

const result = await run_experiment({
  command: "pnpm test --run",
  timeout_seconds: 120,           // optional, default 300
  checks_timeout_seconds: 300,    // optional, for checks script
});
// result: { exit_code, duration_seconds, stdout, stderr }

log_experiment

Records result, auto-commits on keep, updates the status widget and dashboard.

await log_experiment({
  metric_value: 42.3,
  status: "keep",          // "keep" | "discard" | "crash" | "checks_failed"
  description: "Enable parallel test workers in vitest config",
  commit_message: "perf: parallel vitest workers → 42.3s (-18%)",
});

The Autonomous Loop

Once started, the agent runs this cycle indefinitely:

propose change → edit files → run_experiment → measure metric
       ↓
  metric improved?
    YES → log_experiment(keep) → auto-commit → update autoresearch.md
    NO  → log_experiment(discard) → git revert → try next idea
       ↓
  repeat forever (until interrupted)

Interrupt anytime with Escape, then ask for a summary of what was tried.

Benchmark Script Format

autoresearch.sh must output at least one METRIC line:

#!/bin/bash
set -euo pipefail

# Pre-checks
[ -f package.json ] || { echo "No package.json"; exit 1; }

# Run workload
pnpm test --run

# Output metric — required format
echo "METRIC seconds=$SECONDS"

Multiple metrics are supported:

echo "METRIC duration_seconds=42.3"
echo "METRIC test_count=847"
echo "METRIC memory_mb=512"

The primary metric (set in init_experiment) drives keep/discard decisions. Others are recorded for analysis.

Backpressure Checks (Optional)

Create autoresearch.checks.sh to guard correctness after every passing benchmark:

#!/bin/bash
set -euo pipefail

pnpm test --run          # full test suite
pnpm typecheck           # TypeScript
pnpm lint                # ESLint / Biome

Behavior:
- File absent → loop runs exactly as before, no change
- File present → runs automatically after every benchmark that exits 0
- Checks time does not count toward the primary metric
- Checks failure → logged as checks_failed, changes reverted (same as crash)
- Dashboard shows checks_failed separately from crash so you can distinguish correctness failures from benchmark errors

UI

Status Widget

Always visible above the editor:

🔬 autoresearch 12 runs 8 kept │ best: 42.3s

Dashboard

Open with /autoresearch — full results table with status, metric values, descriptions, and best run highlighted.

• Ctrl+X — toggle dashboard
• Escape — close dashboard / interrupt loop

Example Domains

// Test speed
{
  command: "pnpm test --run",
  metric: "seconds",
  direction: "lower",
  scope: ["vitest.config.ts", "src/**/*.test.ts"],
}

// Bundle size
{
  command: "pnpm build && du -sb dist | cut -f1",
  metric: "bytes",
  direction: "lower",
  scope: ["vite.config.ts", "src/index.ts"],
}

// LLM training loss
{
  command: "uv run train.py --epochs 1",
  metric: "val_bpb",
  direction: "lower",
  scope: ["train.py", "model.py", "config.yaml"],
}

// Build speed
{
  command: "pnpm build",
  metric: "seconds",
  direction: "lower",
  scope: ["tsconfig.json", "vite.config.ts"],
}

// Lighthouse performance
{
  command: "lighthouse http://localhost:3000 --output=json | jq '.categories.performance.score'",
  metric: "score",
  direction: "higher",
  scope: ["src/pages/index.tsx", "public/"],
}

autoresearch.md Structure

The skill writes and maintains this file throughout the session:

# autoresearch: vitest-speed

## Objective
Reduce test suite wall-clock time. Baseline: 51.7s.

## Metric
- Name: seconds
- Direction: lower is better
- Baseline: 51.7s
- Best so far: 42.3s (run 8)

## Files in scope
- vitest.config.ts
- src/**/*.test.ts

## What's been tried
- [kept] Run 8: Enable parallel workers → 42.3s (-18%)
- [discarded] Run 5: Increase pool size to 16 → 53.1s (+3%)
- [kept] Run 3: Disable coverage in CI → 47.8s (-8%)

## Dead ends
- Increasing pool beyond 8 causes memory pressure, net negative

## Next ideas
- [ ] Try forks pool instead of threads
- [ ] Investigate slow test files with --reporter=verbose

autoresearch.jsonl Format

One JSON object per line:

{"run":1,"metric_value":51.7,"status":"keep","description":"baseline","commit":"a1b2c3d","timestamp":"2025-01-15T10:00:00Z"}
{"run":2,"metric_value":49.2,"status":"keep","description":"disable coverage","commit":"e4f5g6h","timestamp":"2025-01-15T10:03:21Z"}
{"run":3,"metric_value":53.1,"status":"discard","description":"increase pool to 16","commit":null,"timestamp":"2025-01-15T10:07:45Z"}
{"run":4,"metric_value":null,"status":"crash","description":"invalid vitest config syntax","commit":null,"timestamp":"2025-01-15T10:09:12Z"}

Read the log programmatically:

import { readFileSync } from "fs";

const runs = readFileSync("autoresearch.jsonl", "utf-8")
  .trim()
  .split("\n")
  .map((line) => JSON.parse(line));

const kept = runs.filter((r) => r.status === "keep");
const best = kept.reduce((a, b) =>
  a.metric_value < b.metric_value ? a : b
);

console.log(`Best: ${best.metric_value} — ${best.description}`);

Resuming a Session

The agent can resume from either file. Recommended resume prompt:

Read autoresearch.jsonl and autoresearch.md, then continue the experiment loop.
Don't restart — pick up from run N and keep going.

Or use the skill:

/skill:autoresearch-create resume

Architecture

┌──────────────────────┐     ┌──────────────────────────┐
│  Extension (global)  │     │  Skill (per-domain)       │
│                      │     │                           │
│  run_experiment      │◄────│  command: pnpm test       │
│  log_experiment      │     │  metric: seconds (lower)  │
│  widget + dashboard  │     │  scope: vitest configs    │
│                      │     │  ideas: pool, parallel…   │
└──────────────────────┘     └──────────────────────────┘
         │
         ▼
  autoresearch.jsonl   ← append-only run log
  autoresearch.md      ← living session document

The extension is domain-agnostic infrastructure. The skill encodes domain knowledge. One extension serves unlimited domains.

Troubleshooting

Loop not starting after skill runs
- Check that autoresearch.sh is executable: chmod +x autoresearch.sh
- Verify the script outputs a METRIC name=number line on success
- Run bash autoresearch.sh manually to debug

Widget not showing
- Run /reload in pi to reload the extension
- Confirm the extension is in ~/.pi/agent/extensions/pi-autoresearch/

run_experiment times out
- Increase timeout_seconds in your run_experiment call
- Default is 300s — long benchmarks (LLM training) may need 3600+

Checks script blocking everything
- Check autoresearch.checks.sh exit codes manually: bash autoresearch.checks.sh
- Increase checks_timeout_seconds if tests are slow
- Remove the file temporarily to isolate whether the benchmark or checks are failing

Session lost after context reset
- The agent needs only autoresearch.jsonl + autoresearch.md to resume
- Both files are committed to the branch — they survive any context reset
- Use the resume prompt above to continue

Metric value not captured
- Ensure the benchmark script exits 0 on success
- The METRIC line must be on stdout, not stderr
- Format must be exactly METRIC name=number (no spaces around =)

License

MIT
```