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ULTRAPLAN — Cloud Deep Planning
30 minutes of autonomous deep thinking on cloud Opus
P1Infrastructure
Summary
Offloads complex planning to a remote Cloud Container Runtime (CCR) running Opus 4.6 with up to 30 minutes of dedicated think time. Local client polls every 3 seconds (~600 API calls over 30 min). Tolerates up to 5 consecutive failures before giving up.
Technical Details
Flow: user triggers ULTRAPLAN → task sent to CCR → Opus thinks for up to 30 min → user reviews/approves via browser → special sentinel __ULTRAPLAN_TELEPORT_LOCAL__ brings result back to local terminal.
Also includes ULTRAREVIEW variant for code review using same keyword detection pattern.
This is Anthropic's answer to 'context window isn't enough' — instead of cramming everything into one session, offload hardest thinking to cloud instance with more time and resources.
Implementation Pattern
TypeScript (conceptual)
// ULTRAPLAN flow (conceptual)
async function ultraplan(task: ComplexTask) {
const session = await sendToCCR(task); // Cloud Container Runtime
// Poll every 3 seconds for up to 30 minutes
let failures = 0;
while (failures < MAX_FAILURES) { // MAX_FAILURES = 5
await sleep(3000);
const result = await pollCCR(session);
if (result.status === 'complete') {
// Sentinel keyword triggers local teleport
return applyWithReview(result, '__ULTRAPLAN_TELEPORT_LOCAL__');
}
if (result.status === 'error') failures++;
}
}Architecture Insight
ULTRAPLAN solves the 'context window isn't enough' problem not by increasing window size, but by offloading deep thinking to a dedicated cloud instance. This is architectural wisdom: scale by delegation, not by enlargement.
Official / Public Basis
Found in source as ULTRAPLAN teleport sentinel pattern. Cloud Container Runtime (CCR) infrastructure referenced. Not officially documented by Anthropic.
Governance Concerns
Remote execution with 30-minute timeout requires human confirmation gate before applying results locally. Polling 600 API calls over 30 minutes needs failure tolerance (5 consecutive failure limit found in source).
LightHope Ecosystem Mapping
LightHope DeepPlan — quarterly planning agent, complex project architecture design, high-risk decisions requiring human confirmation