pine-debugger — Claude Code skill: debug Pine Script

What pine-debugger does

The skill covers the usual Pine Script v6 failures and shows how to get around them. It ships with ready-made techniques: a label value inspector, a table-based variable monitor, a loop iteration counter, a repainting detector, an na tracker, plus debugging for request.security() and conditional input calls. The agent reads your script, finds the spot that misbehaves and inserts the debug block.

A good chunk of it is about traps. for loop boundaries are now re-evaluated on every iteration, so a loop over a growing array never ends; the skill points you to for...in or to caching the size before the loop. It also catches line continuation errors, plot inside local scope, and bid/ask returning na outside the tick timeframe.

The skill touches files through Read, Edit, Grep and Glob. No API keys, no external services. One caveat: part of the material describes 2025 Pine Script changes, so if your script targets an older version, the for...in and input active advice won't apply.