explainx / blog
Jul 15, 2026: Colin Snyder's Star Fleet Mac app runs 20 GPT-5.6 Codex starships on 60-vCPU servers, Lean 4 + Fable verification, Ton 618 memory. 27 Erdős solutions proposed. explainx.ai maps harness, HN debate, and formal status.
Jul 12, 2026
Tibo: point your orange crab at GPT-5.6 Sol — takes 5 minutes. Official alias sets subagent model, effort, concurrency. explainx.ai maps Tibo's 3 steps vs claude-code-proxy and CC Switch.
Jul 15, 2026
OpenAI's merged Codex + ChatGPT Work stack crossed 8M active users in five months, with a 2M jump in days after GPT-5.6 Sol GA. Tibo reset limits again; Altman warns scaling hiccups ahead. explainx.ai breaks down numbers, resets, and subscriber reality.
Jul 15, 2026
Pliny's "SYS PROMPT LEAK" for Codex Desktop went viral — commentary channels, SKILL.md routing, sandbox prefix_rules, and desktop automations in one 42K-word operator doc. OpenAI's Tibo Sottiaux countered that many prompts live in the open-source Codex repo. explainx.ai breaks down what's new vs theater.
Colin Snyder shipped Star Fleet Math — a Mac desktop app that runs up to 20 parallel math agents ("starships"), each on its own 60-vCPU server with GPT-5.6 via Codex, Lean 4 verification, Claude Fable review, and Ton 618 — a local premise graph where verified lemmas compound.
By July 15, 2026, the dashboard showed 27 Erdős problems as Solution Proposed, 623 untested, and 0 Frontier Math or Millennium claims closed. A Hacker News thread (92 points, title: Solving 20 Erdős Problems with 20 Codex Accounts Running in Parallel) split praise for the harness engineering from skepticism about readability, cost, and what "solved" means.
explainx.ai maps architecture, verification chain, and how this fits next to Leanstral, Erdős #728, and the formal-math agent wave.
| Item | Detail |
|---|---|
| Builder | Colin Snyder · advised by Mike Kim · starfleetmath.com |
| Stack | TypeScript + Bun Mac orchestrator · 20× GPT-5.6 Codex · Lean 4 |
| Status (Jul 15) | 27 Erdős Solution Proposed · 623 untested · 650 Erdős tracked |
| Verify | Lean 4 → Fable harness → optional iMessage human review |
| Memory | Ton 618 — verified premises in dependency graph |
| Funding | Self-funded weekend project — not employer-linked (Colin on HN) |
| HN | Harness praised · writeups vs Lean artifact quality debated |
Each starship is a full agentic harness, not a single chat session:
| Layer | Capability |
|---|---|
| Reasoning | GPT-5.6 via Codex — one account per parallel problem |
| Compute | 60 vCPU, 120 GiB sandbox · bursts to 2,000 vCPUs (x86 search) · H100 GPU bursts |
| Formal | Lean 4 toolchain · CaDiCaL, kissat, Z3, CP-SAT · SageMath, PARI/GP, GAP, Macaulay2 |
| Retrieval | Largest Lean 4 premise corpus Colin cites · gemini-embeddings-2 + Chroma English search |
| Literature | Firecrawl index of arXiv + GitHub |
| Review | Claude Fable proof-verifier harness |
| Human gate | iMessage API to Colin after Fable approval |
| Compounding | Ton 618 — every verified theorem/lemma woven into a dependency graph |
explainx.ai read: This is meta-harness design — the Mac app is a fleet commander; heavy lifting lives in remote sandboxes and API models. That matches how GPT-5.6 Sol coding agents use Codex for execution while local UI coordinates sessions — here scaled to 20 math problems at once.
starfleetmath.com groups problems into Solution Proposed, Untested, and solved counts for Frontier Math / Millennium tiers.
Solution Proposed (27) includes Erdős #123, #129, #130, #254, #267, #320, #321, #336, #394, #415, #450, #489, #521, #522, #538, #584, #638, #662, #709, #769, #793, #796, #959, #1183, #1186, #1188, #1189 — each with a Lean-linked writeup on the site.
Colin's team avoided problems with informal partial answers already online — a deliberate filter against literature regurgitation.
| Claim level | What it implies |
|---|---|
| Solution Proposed | Lean + Fable pipeline accepted a candidate |
| Erdős wiki 🟢 | Community / Terence Tao tracker treats as resolved |
| Peer review | Independent mathematicians validate novelty and correctness |
Aristotle + GPT-5.2 Pro reached wiki full solution on #728 (Jan 2026) with a published arXiv writeup. Star Fleet's batch is volume + parallelism — acceptance requires the same external refereeing, not only formal syntax.
vessenes (HN, ~3h): praised Lean corpus, vCPU sharding, embedding search — but said Fable proof summaries read like opaque technical walls vs the Cycle Double Cover leak's more human-readable narrative. Lean 4 bytecode remains the compelling artifact; distillation into teachable technique is still hard.
Other threads:
| Topic | HN take |
|---|---|
| Cost | 20 × 60-vCPU dedicated servers — Colin: self-funded; not Xinobi AI employer project |
| GPT-5.6 local? | API/Codex, not self-hosted weights |
| Open source? | Asked; no public repo yet |
| Millennium overnight? | Joked — Colin's scope is Erdős catalog, not Clay prizes |
| Fun vs jobs | Split: conjecture + referee stay human vs proof search automates |
Colin replied he will work on more human-readable writeups — acknowledging the artifact / exposition gap formal AI keeps hitting.
| System | Shape | Notable outcome |
|---|---|---|
| Star Fleet | 20× parallel Codex + Lean + Ton 618 | 27 proposals Jul 2026 |
| GPT-Erdos | Catalog + Lean attempts + reviewers | Taxonomy of new vs literature hits |
| Aristotle / Harmonic | Autoformalization pipeline | #728 wiki full solution |
| Leanstral 1.5 | Open MoE prover model | PutnamBench, miniF2F saturation |
| OpenAI geometry | General reasoning model | Planar unit distance milestone |
Star Fleet optimizes orchestration and memory compounding — not a single frontier model drop. Whether Ton 618 beats raw model scale depends on how many proposals survive human + wiki scrutiny.
Star Fleet Math (July 2026) is Colin Snyder's Mac fleet orchestrator: 20 GPT-5.6 Codex starships, Lean 4 + SAT/SMT/CAS sandboxes, embedding search over a large premise corpus, Fable verification, and Ton 618 compounding memory — yielding 27 Erdős Solution Proposed entries on starfleetmath.com. Hacker News celebrated the harness while questioning proof writeups, cost, and resolution status. Solution Proposed ≠ community accepted; compare to #728 and Leanstral for how formal artifacts graduate to recognized math.
Sources: starfleetmath.com · erdosproblems.com · Hacker News thread, Jul 15, 2026 · Erdős #728 arXiv writeup · Colin Snyder HN replies
Status counts from starfleetmath.com July 15, 2026. Formal acceptance requires independent mathematical review beyond this article.
