Diagnose missing color dots in MTG decklist crawler pipeline
Session from merchantscroll-traces on Hugging Face by vedalken · MIT · condensed by Coders Talk
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17ssession
0interventions
GOAL
Investigate a merchantscroll pipeline that crawls and displays MTG decklists, to find why newly crawled decklists show no color dots on the frontend.
- +0Prompt · +0Explore the merchantscroll codebase: the crawler pipeline, how colors are assigned to decklists, the JSON data schema, how index.html renders color dots, and where color assignment is missing for new decklists.
- +0mAgent did · +0mGlobbed and grepped the repo for color-related code, read pipeline.py, crawler.py, scryfall.py, saver.py, domain.py, the run-crawler workflow, index.html, and example scripts to map the pipeline and color logic.
- +0mAgent did · +0mKept searching for the actual crawl entry point (crawl.py, pipeline.run, run-crawler references) since the visible workflow and scripts didn't clearly match; checked pyproject.toml, __main__.py, constants files, and used semantic search.
- +0mAgent did · +0mFound run-crawler.yml was blocked by .cursorignore, so pulled context from past Cursor agent-transcripts logs and a sample raw JSON decklist file to reconstruct what the workflow actually invokes.
- +0mAgent did · +0mLocated crawl.py and entrypoint.py, confirmed via workflow file content and prior transcripts that CI runs entrypoint.py, and traced why it skips the Scryfall-based color enrichment step used elsewhere.
- +0mOutcome · +0mDelivered a full report: two parallel crawl paths exist, and the grey-dot bug is caused by GitHub Actions running the old entrypoint.py crawler, which never calls the Scryfall color-enrichment logic used by the other pipeline path.
VERDICT
Next time I'd point the agent straight at .github/workflows/run-crawler.yml and entrypoint.py instead of letting it search broadly, since .cursorignore blocked the workflow file and cost a lot of exploration turns. Digging through the old agent-transcripts logs to reconstruct what CI actually runs was what actually cracked it — that's what I'd do first.