coding-cat-official/coding-cat

Feature: Tracing questions

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#164 opened on Feb 25, 2026

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good first issue

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Description

Can we introduce a new kind of problem, tracing where students need to show the steps of evaluation for a given expression like

Trace 4 + 10 - 40

and the students would answer (one line at a time)

=> 14 - 40 => 26

I think these could not be done programmatically and would just be a lot of grunt work. We don't need like 100 problems in this way, we can start small. It would require just string checking. Maybe it could be a bit more intelligent and notify the student when they "skip" a step along the way or something?

Contributor guide

Research direction
Examine existing problem types in the codebase, specifically how multiple choice or free response questions are implemented. Look for the place where problems are defined and the evaluation logic. Propose a new problem type that accepts a list of step strings and compares them with the student's input sequentially. Consider adding validation to detect skipped steps.
Tech stack
typescriptpython
Domain
web dev
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GitTypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60