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The Rust CLOB Rebuild Is the Next Forced Code Change

GitHub: https://github.com/abrownfox0/abrownfox001-twap60-prediction-trigger-system

YouTube walkthrough: https://www.youtube.com/watch?v=XzhugRL6BV4

Live profile: https://polymarket.com/@abrownfox001

Part 2 said settlement is already law: 5-minute crypto pays 60s Chainlink TWAP.

Part 3 is the execution plane. This is the change that can force clob.ts to move even if your signal is correct.

1. What Polymarket Has Actually Said

By mid-September 2026 the public picture looks like this:

  • The live prediction CLOB still matches signed orders and settles on Polygon.
  • DeFi engineering has called the current book full of tech debt and said it cannot be saved long-term.
  • A replacement matching engine is being rewritten in Rust, with a target around mid-to-late Q4.
  • The old CLOB is supposed to stay up while the new one is built beside it.
  • Breaking changes for integrators are supposed to be minimal and announced in advance.
  • Early internal benchmarks circulated with much lower p99 latency and much higher order throughput. Those are dev numbers, not production SLAs.
  • A senior onchain product hire (former Zora CEO Jacob Horne) was added while that rebuild is already underway.

Translate that for a bot:

Do not wait for a surprise “CLOB is gone” tweet.

Do wrap your order layer so you can swap endpoints, error shapes, and ack semantics without touching the TWAP engine.

2. Why a 5m Bot Feels This Immediately

@abrownfox001 is not a quote-spam MM. It still depends on the book for four things:

  1. mid-band 45–55¢ fills
  2. staggered clips instead of one lift
  3. later flat scratches
  4. idempotent cancels when conviction dies or a socket blips

If matching latency, cancel semantics, or tradeID vs hash behavior changes, the scratch loop is the first thing that breaks.

A faster book helps only if:

  • your stale-TWAP halt still works
  • you do not double-send after a reconnect
  • “breakeven scratch” still finds depth near 50¢

Speed without those guards is just faster adverse selection.

3. What to Isolate Now

Keep settlement and matching in different modules. The public repo already does this:

Module Should care about CLOB rewrite?
twapFeed.ts No
signal.ts No
markets.ts Only if market discovery URLs change
engine.ts Only via order/cancel results
clob.ts Yes. This is the blast radius.

clob.ts should already look like an adapter:

place_limit()
cancel()
cancel_all_slot()
get_open_orders()
map_ack(response) -> { order_id, trade_ids, status }
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Do not let engine code parse raw CLOB JSON.

When Rust CLOB lands, you want one adapter change, not a rewrite of scratch logic.

4. Compatibility Window, Not Big-Bang Faith

Polymarket’s stated plan is dual-running:

current CLOB  ───────────────────► still live
Rust CLOB     ──── build / bench ─► Q4 target
integrators   ──── announced diffs only
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Prepare for the boring deltas first:

  • ack fields (tradeID already replaced some hash behavior on FAK/FOK)
  • cancel batch limits
  • rate-limit headers / Retry-After
  • websocket book vs REST book lag
  • cancel-only modes during incidents
  • possible gateway host changes even if “CLOB v2 URL stays”

Assume minimal breaking changes means “you still have to regression-test every order type you use.”

For this engine that list is small: taker-ish limits in the 45–55¢ band, cancels, no giant batch MM stack.

5. What I Would Not Do

  • Freeze a custom fork of an old clob-client and hope Q4 is a no-op
  • Put TWAP math inside the order client
  • Treat benchmark “15x throughput” as permission to 10x clip size
  • Point the 5m directional bot at Perps just because that book is also Rust
  • Ignore Sep 15 maintenance and the Sep 19 trading outage as “unrelated to matching”

Those incidents are why part 4 exists. Matching rebuilds and reliability incidents are the same operational class: your bot must survive a book that is temporarily not itself.

6. Prep Checklist

  • [ ] Order/cancel isolated in one adapter
  • [ ] Idempotency keys / local order registry
  • [ ] Parse Retry-After and tier warnings
  • [ ] Dry-run path still works (npm start)
  • [ ] Slot halt if acks or book data look impossible
  • [ ] Log raw ack + mapped status for one week before any cutover
  • [ ] Follow @PolymarketDevs for the actual integrator note, not Twitter summaries

7. What Part 4 Covers

Even if the Rust book ships cleanly, current production already has:

  • volume-tiered CLOB rate limits
  • RTDS as the TWAP path
  • maintenance windows
  • a multi-subsystem outage that took CLOB + RTDS + settlement down together

Part 4 is bot ops: what to do when the platform is degraded, not when the model is wrong.

Links

Not financial advice. Benchmarks are not production capacity.

If you have more questions, please feel free to contact me at any time: https://t.me/abrownfox001

My Polymarket Activity: https://polymarket.com/@abrownfox001?tab=activity

#Polymarket #CLOB #Rust #TradingBot #BTC #AlgoTrading #PredictionMarkets
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