Master DSA with this Claude SKILL
Most people fail Leetcode interviews not because they do not know the answers, but because they never built pattern recognition. Hence, today I am sharing a Claude skill to help you master DSA the right way.
There is a free, open-source Claude skill called “Algo Sensei” that turns Claude into a personal DSA mentor. It not just gives you the answer, but it also teaches you to think like a senior engineer.
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What is Algo Sensei?
Algo Sensei is a Claude skill, a SKILL.md file you install once, and it gives Claude a completely new set of capabilities designed around Leetcode and DSA practice.
It has 5 intelligent modes that activate automatically based on what you ask:
Tutor Mode: Explains concepts from the ground up, with visual diagrams and intuition-building
Hint Mode: A 5-level progressive hint system that guides you without giving away the answer
Review Mode: Reviews your code for correctness, time/space complexity, edge cases, and interview readiness
Interview Mode: Full mock interview simulation with a realistic interviewer persona, real-time feedback, and a post-interview report
Pattern Mapper Mode: Teaches you to recognise algorithmic patterns dynamically, not just memorise them
How to install it
REPO LINK: https://github.com/karanb192/algo-sensei
On Claude Code (Recommended)
git clone https://github.com/karanb192/algo-sensei.git
cp -r algo-sensei ~/.claude/skills/Restart Claude Code. The skill auto-detects and activates whenever you mention a DSA problem.
On Claude.ai
Go to claude.ai and create a new Project
Click “Add content” and upload these files from the repo:
SKILL.md (required)
All 5 files from the modes/ folder
docs/dsa-cheatsheet.md (optional but useful)
Every conversation in that project now has Algo Sensei built in
That is it. No paid tools. Fully free and open-source.
How to use it?
Once installed, Algo Sensei figures out which mode to activate based on how you phrase your request. Here are the exact phrases to use:
To get a hint without spoiling the answer:
“I’m stuck on LeetCode #3 - Longest Substring Without Repeating Characters. Give me a hint.”
To understand a concept you keep getting wrong:
“Explain dynamic programming to me from the ground up.”
To get your code reviewed:
“Here is my solution for Two Sum. Review it.” [paste your code]
To do a mock interview:
“Let’s do a mock interview with a medium-level problem.”
To identify which pattern applies:
“I am not sure what approach to use for this problem.” [paste problem statement]
You do not have to pick a mode. Claude switches automatically.
Why this beats most Leetcode prep resources
Most resources like LEETCODE PREMIUM just directly give you the solution. They cannot help you build your problem solving skills.
Algo Sensei adapts in real time. The Hint Mode has 5 levels, from the gentlest nudge to a pseudocode skeleton as a last resort. You only go deeper if you are truly stuck. That progressive struggle is what builds real problem-solving skill.
The Pattern Mapper Mode is the most underrated feature. Instead of memorising “sliding window = fixed template,” it teaches you the signals and problem characteristics that tell you which pattern to reach for. That is the skill that transfers to problems you have never seen before.
Final Thoughts
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I hope this helps you :)