> ## Documentation Index
> Fetch the complete documentation index at: https://leetcode-py.wisl.dev/llms.txt
> Use this file to discover all available pages before exploring further.
> ## Agent Instructions
> leetcode-py is a Python LeetCode practice environment generator with one CLI: lcpy. It is not a service or platform.
> Each problem is a directory under leetcode/ with README.md, solution.py, test_solution.py, helpers.py, and playground.ipynb. lcpy gen creates them from JSON templates bundled with the package.
> Examples are backed by tests; copy them verbatim.
# Collections
> Curated problem sets as tags, and how they drive bulk generation.
Collections are curated problem lists (Grind 75, Blind 75, the NeetCode
roadmaps) encoded as tags. Every collection is a tag you can filter, list,
and bulk-generate with. Membership is defined in `tags.json5` inside the
[JSON resources](/contributing/problem-creation); `lcpy` reads it for `-t`
filters.
## The collections
| Collection | What it gives you |
| ------------------------------------------- | ---------------------------------------------------------------------- |
| [`grind-75`](/catalog/grind-75) | The essential 75 from Tech Interview Handbook, ordered by a study plan |
| [`grind`](/catalog/grind) | Extended Grind; superset of Grind 75 with more problems |
| [`blind-75`](/catalog/blind-75) | The classic curated list that started the trend |
| [`neetcode-150`](/catalog/neetcode-150) | Comprehensive NeetCode coverage by topic |
| [`neetcode-250`](/catalog/neetcode-250) | The full NeetCode roadmap; coverage still growing |
| [`algo-master-75`](/catalog/algo-master-75) | Algorithmic mastery set curated in this repo, 75 problems |
Current problem counts live on the [Catalog](/catalog) pages, which are
generated straight from the templates and never go stale.
## Preview before you generate
```bash theme={"theme":{"light":"github-light","dark":"github-dark"}}
lcpy list -t grind-75 # every problem in the collection
lcpy list -t neetcode-250 -d Hard # narrow to one difficulty
```
## Generate a whole collection
```bash theme={"theme":{"light":"github-light","dark":"github-dark"}}
lcpy gen -t grind-75 # all of Grind 75 into ./
lcpy gen -t blind-75 -o leetcode
lcpy gen -t grind-75 -d Easy # just the Easy problems
```
Bulk generation prints one `Generated problem:` line per problem and
creates each directory with the standard
[six files](/practice/problem-anatomy).
## Picking a collection
Short on time: `grind-75`. Want the classic list everyone references:
`blind-75`. Preparing by topic with video explanations: `neetcode-150`.
The right collection is the one you will finish; every one of them
generates the same high-quality problem directories.