Hammerstein.ai
Strategic-reasoning AI for tabletop wargames, built around the Hammerstein-Equord doctrine.
Paste your board state, a status report, and the turn question. Get back Auftragstaktik orders.
Live: hammerstein.ai. Benchmark: hammerstein.ai/benchmark. Journal: hammerstein.ai/journal. The framework underneath: the CLI · the 7B model.
What it does
Wargamer mode is the live surface. Paste your board state, a short status report, and the turn question you're trying to decide. The model returns kriegspiel-style Auftragstaktik orders — situation, intent, main effort, supporting effort, end-state — for the side you're playing. Same framework as the open-source CLI, applied to wargame turns instead of plan audits.
What's shipped
- Text-input turns — board state + status + question → Auftragstaktik orders. Sonnet 4.6 wrapped in the Hammerstein system prompt. The primary surface.
- Board-photo upload — JPG or PNG resized to 1600px in your browser with EXIF rotation preserved, attached as a multimodal reference image per turn.
- Rulebook ingest — paste rules text or drop a PDF; parsed client-side via pdf.js, never uploaded. Cited when a specific rule shapes the order.
- Persistent campaign memory across machines — paid-tier campaigns sync server-side via Cloudflare D1. Start a campaign on your laptop, resume on your phone.
- Anti-metagame ethical constraint — the model does not card-count or game hidden information; the constraint is a hard rule in the system prompt, not a courtesy. Challenge mode toggles it off when you want the AI playing without that restraint.
Benchmark
On the framework-discipline benchmark, the system prompt wins across model scales — frontier wraps (Opus 4.7 / Sonnet 4.6 / GPT-5), out-of-domain question sets, and a 7B distilled local model. v0.7 human-judge results compiling. Methodology, per-generation results, and the replication kit live at hammerstein.ai/benchmark.
Pricing
$15 / month for 120 turns — sized for a real campaign cadence, not metered by the day. First 50 subscribers; pricing rises after. The free demo runs at 5 turns per IP per day for anyone who wants to test the surface before subscribing.
Try it
Live at hammerstein.ai. The free demo doesn't require a subscription — just paste a turn and see what comes back. The subscriber tier unlocks the 120-turn-per-month cap and cross-machine persistent campaign memory.