Van ChatGPT naar Claude: complete account migratie

Ik wil mijn volledige ChatGPT account migreren naar Claude. Gebruik de Chrome extensie om via de ChatGPT browser-tab alles te exporteren. Ik ben ingelogd op chatgpt.com.

## Wat er geëxporteerd moet worden
1. Custom GPTs: alle GPTs met hun volledige system instructions
2. Projecten: alle projecten met metadata, bestanden en instructies
3. Memories: alle opgeslagen memories
4. Alle gesprekken: de volledige inhoud van elke conversatie, als markdown

## Technische aanpak

### Stap 0: Setup helper functies
Injecteer deze functies in de ChatGPT tab via JavaScript:

window._download = (filename, content) => {
  const blob = new Blob([content], {type:'text/plain'});
  const a = document.createElement('a');
  a.href = URL.createObjectURL(blob);
  a.download = filename;
  a.click();
  URL.revokeObjectURL(a.href);
};

window._convToMarkdown = (data) => {
  const msgs = Object.values(data.mapping || {})
    .filter(m => m.message && m.message.author?.role !== 'system' && m.message.content?.parts?.length > 0)
    .sort((a,b) => (a.message.create_time||0) - (b.message.create_time||0))
    .map(m => {
      const role = m.message.author.role === 'user' ? 'User' : 'Assistant';
      const parts = m.message.content.parts.map(p => typeof p === 'string' ? p : JSON.stringify(p)).join('\n');
      return '**' + role + ':** ' + parts;
    });
  const date = data.create_time ? new Date(data.create_time * 1000).toISOString().slice(0,10) : 'unknown';
  return '# ' + (data.title || 'Untitled') + '\nDatum: ' + date + ' | Berichten: ' + msgs.length + '\n\n' + msgs.join('\n\n---\n\n');
};

### Stap 1: Auth token ophalen
const session = await fetch('/api/auth/session');
const {accessToken} = await session.json();

### Stap 2: Custom GPTs exporteren
GET /backend-api/gizmos/bootstrap?limit=2
Download als custom-gpts-export.md

### Stap 3: Projecten exporteren
GET /backend-api/gizmos/snorlax/sidebar?owned_only=true&conversations_per_gizmo=5
Download als projecten-export.md

### Stap 4: Memories exporteren
GET /backend-api/memories?exclusive_to_gizmo=false&include_memory_entries=true
Download als memories-export.md

### Stap 5: Gesprekken ophalen (smart dedup paginatie)
window._smartFetch = {done:false, newItems:[], dupes:0, uniqueIds:new Set(), consecutiveDupePages:0};

(async () => {
  const state = window._smartFetch;
  const getToken = async () => (await (await fetch('/api/auth/session')).json()).accessToken;
  let token = await getToken(), tokenAge = 0, offset = 0;
  while (true) {
    if (tokenAge >= 50) { token = await getToken(); tokenAge = 0; }
    const r = await fetch('/backend-api/conversations?offset=' + offset + '&limit=100&order=updated', {headers: {'Authorization': 'Bearer ' + token}});
    if (r.status === 429) { await new Promise(r => setTimeout(r, 30000)); token = await getToken(); tokenAge = 0; continue; }
    const items = (await r.json()).items || [];
    if (!items.length) break;
    let newCount = 0;
    for (const item of items) { if (!state.uniqueIds.has(item.id)) { state.uniqueIds.add(item.id); state.newItems.push(item); newCount++; } else state.dupes++; }
    if (!newCount && ++state.consecutiveDupePages >= 3) break; else if (newCount) state.consecutiveDupePages = 0;
    offset += 100; tokenAge++;
    await new Promise(r => setTimeout(r, 300));
  }
  state.done = true;
})();

### Stap 6: Alle gesprekken downloaden (parallel)
window._parallelState = {processed:0, total:0, errors:0};

(async () => {
  const state = window._parallelState;
  const items = window._smartFetch.newItems;
  state.total = items.length;
  const getToken = async () => (await (await fetch('/api/auth/session')).json()).accessToken;
  let token = await getToken(), tokenAge = 0, batch = [], batchNum = 1;
  for (let i = 0; i < items.length; i += 5) {
    if (tokenAge >= 150) { token = await getToken(); tokenAge = 0; }
    const results = await Promise.all(items.slice(i, i+5).map(async item => {
      try {
        let r = await fetch('/backend-api/conversation/' + item.id, {headers: {'Authorization': 'Bearer ' + token}});
        if (r.status === 429) { await new Promise(r => setTimeout(r, 30000)); token = await getToken(); tokenAge = 0; r = await fetch('/backend-api/conversation/' + item.id, {headers: {'Authorization': 'Bearer ' + token}}); }
        return r.ok ? await r.json() : (state.errors++, null);
      } catch(e) { state.errors++; return null; }
    }));
    tokenAge += 5;
    for (const data of results) { if (data) batch.push(window._convToMarkdown(data)); state.processed++; }
    if (batch.length >= 100) { window._download('gesprekken-batch-' + String(batchNum++).padStart(2,'0') + '.md', batch.join('\n\n===NEXT===\n\n')); batch = []; }
    await new Promise(r => setTimeout(r, 200));
  }
  if (batch.length) window._download('gesprekken-batch-' + String(batchNum).padStart(2,'0') + '.md', batch.join('\n\n===NEXT===\n\n'));
  window._download('inventaris.json', JSON.stringify(items.map(it => ({id:it.id, title:it.title, created:it.create_time, updated:it.update_time})), null, 2));
  state.done = true;
})();

Voer alle stappen sequentieel uit. Monitor de voortgang en rapporteer wanneer alles klaar is.