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Coding Prompts Archive

This page archives effective AI prompts used during development of the TradeEntry platform.

Feature: Bhav Downloader Progress Polling​

Context: Frontend polling for background task completion without WebSocket.

Prompt:

The FastAPI BackgroundTasks dispatches after the HTTP response is sent,
so the frontend polling can see stale stats.json. How do I implement 
a hasSeenRunning guard so the React interval doesn't stop prematurely?

Key Insight: Close over a mutable hasSeenRunning boolean inside the setInterval callback. Only stop polling after you have seen at least one RUNNING state.

Feature: AMI Multi-File Download​

Context: Allow users to select multiple AMI export files and download as ZIP.

Prompt:

FastAPI endpoint that accepts a list of filenames, validates each with 
regex, and returns a single ZIP file via StreamingResponse using in-memory BytesIO.

Solution: Used zipfile.ZipFile(buf, "w", ZIP_DEFLATED) into an io.BytesIO buffer, then returned StreamingResponse(buf).

Feature: NSE Working Days Calculation​

Context: Determine which dates to sync bhav copies for.

Prompt:

How do I compute NSE trading days between two dates, excluding weekends 
and NSE holidays, using pandas?

Bug Fix: Unicode in Windows Print​

Context: → and … characters in log messages failed on Windows cp1252.

Prompt:

'charmap' codec can't encode character '→' on Windows when printing 
to console. How to fix without changing the system locale?

Solution: Replace Unicode characters with ASCII equivalents (→ → to, … → ...).

Placeholder: Add More Prompts Here​

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