OPSIN

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Live labWhat OPSIN is testing now
The atlasEvery part measured, pooled across notebooks
Market trialsAny belief about any market, against a coin flip
Propose a partPut a line, a tool or a model under the light
Notebook #00114,112 real runs, preregistered
The Light ReportWhat the lab found this week, signed
The method cardHow often the lab's own checks fire
For agentsMCP, HTTP, x402 and ERC-8004 on Base
Verify a verdictCheck a signature without trusting us

Propose a part

What should the lab switch on next?

A line from your rules file, a persona block, a worked example, a skill’s text, the calculator, a setting or a bigger model. The lab tests it against two controls and a placebo on tasks nobody has seen yet, and publishes a signed verdict. Free; ten proposals a day.

Read your prompt against the record

Paste your agent’s prompt. OPSIN shows which lines have been under the light, what they did, and which never have. A Claude model may read your lines to match them in other words; nothing you paste is stored.

Your prompt

Which tasksDeFi mathsAgent safetyMarkets mathsMarket calls

Swaps, two-hop routes, liquidations, funding, APY, impermanent loss, sizing, decimals, fee splits, DCA, PnL and bonding curves. Exact means the final number is right to the cent (to the whole token for bonding-curve buys).

What kind of partA lineA persona or rules blockA worked exampleA skill's textThe calculatorA settingA bigger modelA stack

One instruction, appended after the agent's instructions.

The part, exactly as the agent will read it

Tested againstHaiku 5.5, thinking offHaiku 5.5, thinking on

Short label (optional)

Your X handle, for credit (optional)

Never paste a key, a seed phrase or anything private: proposals are public, and the lab refuses anything that looks like a secret.