firecrawl-upgrade-migration

What this skill does

# Firecrawl Upgrade & Migration

## Current State

!`npm list @mendable/firecrawl-js 2>/dev/null | grep firecrawl || echo 'Not installed'`

## Overview

Guide for upgrading `@mendable/firecrawl-js` SDK versions and migrating from Firecrawl API v0/v1 to v2. Covers breaking changes in import paths, method signatures, response formats, and the new extract v2 schema format.

## Version History

| SDK Version | API Version | Key Changes |
|-------------|-------------|-------------|
| 1.x | v1 | `asyncCrawlUrl`, `checkCrawlStatus`, `mapUrl` added |
| 0.x | v0 | Legacy `crawlUrl` with `waitUntilDone` param |

## Instructions

### Step 1: Check Current Version

```bash
set -euo pipefail
# Check installed version
npm list @mendable/firecrawl-js

# Check latest available
npm view @mendable/firecrawl-js version
```

### Step 2: Create Upgrade Branch

```bash
set -euo pipefail
git checkout -b upgrade/firecrawl-sdk
npm install @mendable/firecrawl-js@latest
npm test
```

### Step 3: Migration — v0 to v1/v2

#### Import Changes

```typescript
// No change needed — import has been stable
import FirecrawlApp from "@mendable/firecrawl-js";
```

#### Crawl Method Changes (v0 -> v1)

```typescript
// BEFORE (v0): crawlUrl with waitUntilDone
const result = await firecrawl.crawlUrl("https://example.com", {
  crawlerOptions: { limit: 50 },
  pageOptions: { onlyMainContent: true },
  waitUntilDone: true,
});

// AFTER (v1+): crawlUrl returns synchronously, or use asyncCrawlUrl
const result = await firecrawl.crawlUrl("https://example.com", {
  limit: 50,
  scrapeOptions: {
    formats: ["markdown"],
    onlyMainContent: true,
  },
});

// For large crawls, use async with polling
const job = await firecrawl.asyncCrawlUrl("https://example.com", {
  limit: 500,
  scrapeOptions: { formats: ["markdown"] },
});
const status = await firecrawl.checkCrawlStatus(job.id);
```

#### Scrape Options Changes (v0 -> v1)

```typescript
// BEFORE (v0)
await firecrawl.scrapeUrl("https://example.com", {
  pageOptions: { onlyMainContent: true },
  extractorOptions: { mode: "llm-extraction", schema: mySchema },
});

// AFTER (v1+)
await firecrawl.scrapeUrl("https://example.com", {
  formats: ["markdown", "extract"],
  onlyMainContent: true,
  extract: { schema: mySchema },
});
```

#### Extract v2 Format (v1 -> v2)

```typescript
// BEFORE (v1): extract as top-level option
await firecrawl.scrapeUrl(url, {
  formats: ["extract"],
  extract: { schema: { type: "object", ... } },
});

// AFTER (v2): schema embedded in formats array
// Note: SDK handles this internally, but REST API changed
// POST /v2/extract with { urls: [...], schema: {...} }
```

#### New Methods in v1+

```typescript
// mapUrl — fast URL discovery (not available in v0)
const map = await firecrawl.mapUrl("https://example.com");
console.log(map.links);

// batchScrapeUrls — scrape multiple URLs at once
const batch = await firecrawl.batchScrapeUrls(
  ["https://a.com", "https://b.com"],
  { formats: ["markdown"] }
);

// asyncBatchScrapeUrls + checkBatchScrapeStatus
const job = await firecrawl.asyncBatchScrapeUrls(urls, { formats: ["markdown"] });
const status = await firecrawl.checkBatchScrapeStatus(job.id);
```

### Step 4: Run Tests and Verify

```bash
set -euo pipefail
npm test

# Quick integration check
npx tsx -e "
import FirecrawlApp from '@mendable/firecrawl-js';
const fc = new FirecrawlApp({ apiKey: process.env.FIRECRAWL_API_KEY! });
const r = await fc.scrapeUrl('https://example.com', { formats: ['markdown'] });
console.log('Success:', r.success, 'Chars:', r.markdown?.length);
"
```

### Step 5: Rollback if Needed

```bash
set -euo pipefail
# Pin to previous version
npm install @mendable/[email protected] --save-exact
npm test
```

## Breaking Changes Checklist

- [ ] `crawlerOptions` / `pageOptions` → flat options + `scrapeOptions`
- [ ] `waitUntilDone: true` → use `crawlUrl` (sync) or `asyncCrawlUrl` + polling
- [ ] `extractorOptions` → `extract` with `schema` or `prompt`
- [ ] Response shape: `data` array for crawl results, `markdown`/`html` for scrape
- [ ] New methods: `mapUrl`, `batchScrapeUrls`, `asyncBatchScrapeUrls`

## Error Handling

| Issue | Cause | Solution |
|-------|-------|----------|
| `crawlerOptions is not valid` | Using v0 params on v1+ | Flatten to top-level options |
| `waitUntilDone is not valid` | Removed in v1 | Use `asyncCrawlUrl` + `checkCrawlStatus` |
| `pageOptions not recognized` | Renamed in v1 | Use `scrapeOptions` inside crawl |
| Missing `mapUrl` method | SDK too old | Upgrade to latest version |

## Resources

- [Migrating from v0](https://docs.firecrawl.dev/v1-welcome)
- [Migrating from v1 to v2](https://docs.firecrawl.dev/migrate-to-v2)
- [Firecrawl Changelog](https://firecrawl.dev/changelog)
- [GitHub Releases](https://github.com/mendableai/firecrawl/releases)

## Next Steps

For CI integration during upgrades, see `firecrawl-ci-integration`.