AI Stack Trace Triage for VS Code
Paste a stack trace, get a real diagnosis — grounded in the actual code on your disk. Powered by any model on OpenRouter (GPT-5, Claude Sonnet, Gemini, DeepSeek, and 350+ more).
Built by Ciro Cesar Maciel — because pasting errors into ChatGPT and re-pasting code is slow.
Stack Trace Triage turns the "copy-paste error into ChatGPT, re-paste relevant files, hope" loop into one keybind.
You select an error or stack trace, hit Cmd+Alt+T — the extension parses the frames, opens the actual files at the line numbers from the trace, sends the surrounding source code along with the error to an LLM on OpenRouter, and shows you a diagnosis with a fix.
Because it reads your real code, the diagnosis is grounded in what actually exists — not what the model guesses your code might look like.
What it does
- Parses stack traces from Node/V8, Python, Java/Kotlin/Scala, Go, Rust, Ruby, PHP, and a generic fallback for anything that looks like
path:line[:col].
- Resolves each frame against your workspace — absolute paths, relative paths, and basename-search fallback for when the path doesn't match (e.g. compiled output pointing at sources).
- Reads the top-N frames' source from disk with a configurable window of surrounding lines.
- Triages the whole thing through the model you picked on OpenRouter.
- Renders the diagnosis as Markdown, side-by-side with your code.
Why I built this
Every error message looks scary. Most are trivial — once you read three lines of context. The problem isn't the AI, it's the workflow: pasting the trace, then alt-tabbing to find each file, then copy-pasting code, then re-prompting. This extension does that loop for you.
Setup
- Install the extension.
- Get an OpenRouter API key (
sk-or-...). Pay-per-token, no subscription.
- On first use, it'll prompt for the key — or run
Stack Trace Triage: Set OpenRouter API Key from the command palette.
- (Optional) Pick a model with
Stack Trace Triage: Select Model. Defaults to Claude Sonnet 4.6 — debugging needs real reasoning.
How to use it
From an editor / log file: select an error message or stack trace → Cmd+Alt+T (Mac) / Ctrl+Alt+T (Win/Linux) → diagnosis opens in a Markdown preview to the side.
From the terminal: copy the error → run Stack Trace Triage: Triage Stack Trace from Clipboard from the command palette (or right-click in the terminal).
Languages supported
| Runtime |
Frame patterns detected |
| Node / JS / TS |
at funcName (/abs/file.ts:12:34) |
| Python |
File "/abs/file.py", line 42, in funcName |
| Java / Kotlin / Scala |
at com.foo.Bar.baz(Bar.java:42) |
| Go |
/abs/file.go:42 +0x12 |
| Rust |
at /abs/file.rs:42:7 |
| Ruby |
/abs/file.rb:42:in 'funcName' |
| PHP |
/abs/file.php(42): funcName() |
| Anything else |
generic path:line[:col] fallback |
Settings
| Setting |
Default |
Description |
stackTraceTriage.openRouterApiKey |
— |
Your sk-or-... key |
stackTraceTriage.model |
anthropic/claude-sonnet-4.6 |
Any OpenRouter slug |
stackTraceTriage.maxFramesToFetch |
5 |
Top-N frames to feed the AI |
stackTraceTriage.contextLinesPerFrame |
20 |
Lines of context per frame |
stackTraceTriage.skipNodeModules |
true |
Skip frames in node_modules, site-packages, vendor, … |
stackTraceTriage.language |
english |
Language for the diagnosis |
Bring your own model
Any OpenRouter slug works. Recommended:
- Claude Sonnet 4.6 (default) — best correctness for debugging
- GPT-5.4 / GPT-5 Mini — strong alternatives
- o4-mini-high — reasoning model, great for tricky bugs
- Gemini 3.5 Flash — cheapest, surprisingly capable for simple errors
Privacy
The selected stack trace + the source code from the resolved frames is sent to OpenRouter and then to the provider behind your chosen model. Nothing else.
License
See LICENSE.
Built by Ciro Cesar Maciel. Sibling extensions: AI Commit Message Generator, TODO Hunter, Regex Whisperer.
