Financial nanobot use case: options flow scanner that caught XLI sector anomaly

[tellmefrankie]

For small, focused agent use cases — sharing a financial analysis agent that's proven useful.

What it does: One task, done well every morning. Scans sector ETF options chains, strips lottery speculation, flags statistical outliers vs each ticker's own baseline.

Why small/focused matters here:
A monolithic 'analyze my portfolio' prompt is unreliable. Breaking it into atomic steps (fetch → filter → compute → compare → flag) makes each step testable and the output consistent. The filter step alone — stripping contracts ≤ $0.10 — is what makes the P/C ratio meaningful.

Result from May 13:

XLI  P/C 5.32 → adjusted 4.89 → baseline 0.82 → 5.96x above → EXTREME
SPY  P/C 0.44 → adjusted 0.44 → baseline 0.55 → 0.80x above → BULLISH

That divergence is a macro rotation signal. Took 90 seconds to surface.

Free + open source: https://github.com/tellmefrankie/ai-investment-skills