leetcode-coach

LeetCode Coach

Find coding problems matched to your weak areas from LeetCode, HackerRank, and Codeforces — then set up local files so you can start solving immediately.

Pre-flight Check (REQUIRED)

Before making any TinyFish call, always run BOTH checks:

1. CLI installed?

which tinyfish && tinyfish --version || echo "TINYFISH_CLI_NOT_INSTALLED"

If not installed, stop and tell the user:

Install the TinyFish CLI: npm install -g @tiny-fish/cli

2. Authenticated?

tinyfish auth status

If not authenticated, stop and tell the user:

You need a TinyFish API key. Get one at: https://agent.tinyfish.ai/api-keys

Then authenticate:

tinyfish auth login

Do NOT proceed until both checks pass.

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Step 1 — Gather inputs

Ask for the following if not already provided:

Required:

• Preferred language — e.g. Python, JavaScript, Java, C++, Go, Rust

Optional (but improves results):

• Weak areas / topics to focus on — e.g. "dynamic programming", "graphs", "sliding window", "binary search", "recursion", "trees"
• Difficulty — Easy / Medium / Hard (default: Medium)

If the user isn't sure of their weak areas, ask:

"What topics do you find yourself getting stuck on, or want to get better at?"

If they still aren't sure, default to: Arrays, Strings, and Hash Maps (the most commonly tested fundamentals).

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Step 2 — Find matching problems

Fire parallel TinyFish agents across LeetCode, HackerRank, and Codeforces to find real problems matching the topic and difficulty.

# Agent 1 — LeetCode problem search
tinyfish agent run \
  --url "https://leetcode.com/problemset/?difficulty={DIFFICULTY}&topicSlugs={TOPIC_SLUG}" \
  "You are on the LeetCode problem set page filtered by difficulty and topic.
   Find 3 problems that match the topic: {TOPIC}.
   For each problem extract:
   - title
   - difficulty (Easy/Medium/Hard)
   - acceptance rate
   - topic tags
   - direct URL to the problem (e.g. https://leetcode.com/problems/two-sum/)
   STRICT RULES:
   - Do NOT click any problem to open it
   - Read only the problem listing visible on this page
   - Return exactly 3 problems, no more
   - Skip premium-only problems (marked with a lock icon)
   Return JSON array: [{title, difficulty, acceptance_rate, tags, url}]" \
  --sync > /tmp/lc_leetcode.json &

# Agent 2 — HackerRank problem search
tinyfish agent run \
  --url "https://www.hackerrank.com/domains/algorithms?filters%5Bsubdomains%5D%5B%5D={TOPIC_SLUG}" \
  "You are on HackerRank's algorithms problem listing filtered by topic.
   Find 2 problems that match the topic: {TOPIC} at {DIFFICULTY} level.
   For each problem extract:
   - title
   - difficulty
   - score/points
   - topic tags
   - direct URL to the problem
   STRICT RULES:
   - Do NOT click any problem
   - Read only the visible listing
   - Return up to 2 problems
   - Skip problems requiring premium or contests
   Return JSON array: [{title, difficulty, score, tags, url}]" \
  --sync > /tmp/lc_hackerrank.json &

# Agent 3 — Codeforces problem search
tinyfish agent run \
  --url "https://codeforces.com/problemset?tags={TOPIC_SLUG}" \
  "You are on Codeforces problem set filtered by tag.
   Find 2 problems matching the topic: {TOPIC} at approximately {DIFFICULTY} level
   (Easy ≈ rating 800-1200, Medium ≈ 1300-1800, Hard ≈ 1900+).
   For each problem extract:
   - problem ID (e.g. 1A, 158B)
   - title
   - rating
   - tags
   - direct URL (e.g. https://codeforces.com/problemset/problem/1/A)
   STRICT RULES:
   - Do NOT click any problem
   - Read only the visible listing
   - Return up to 2 problems
   Return JSON array: [{id, title, rating, tags, url}]" \
  --sync > /tmp/lc_codeforces.json &

wait

echo "=== LEETCODE ===" && cat /tmp/lc_leetcode.json
echo "=== HACKERRANK ===" && cat /tmp/lc_hackerrank.json
echo "=== CODEFORCES ===" && cat /tmp/lc_codeforces.json