cf

cf - Codeforces CLI

A command-line tool and Go SDK for competitive programming with Codeforces integration.

Features

• Codeforces API Client - Full-featured API client with caching and rate limiting
• Web Scraper - Parse problem statements, samples, and metadata
• Workspace Management - Organize problems locally with versioned schemas
• Health Checks - Verify system configuration and connectivity
• TUI Dashboard - Beautiful terminal UI (coming soon)
• Cross-Platform - Works on Linux, macOS, and Windows

Installation

Using Go (requires Go 1.22+)

go install github.com/harshit-vibes/cf/cmd/cf@latest

Download Binary

Download pre-built binaries from the Releases page.

macOS (Apple Silicon)

curl -Lo cf https://github.com/harshit-vibes/cf/releases/latest/download/cf-darwin-arm64
chmod +x cf
sudo mv cf /usr/local/bin/

macOS (Intel)

curl -Lo cf https://github.com/harshit-vibes/cf/releases/latest/download/cf-darwin-amd64
chmod +x cf
sudo mv cf /usr/local/bin/

Linux (amd64)

curl -Lo cf https://github.com/harshit-vibes/cf/releases/latest/download/cf-linux-amd64
chmod +x cf
sudo mv cf /usr/local/bin/

Linux (arm64)

curl -Lo cf https://github.com/harshit-vibes/cf/releases/latest/download/cf-linux-arm64
chmod +x cf
sudo mv cf /usr/local/bin/

Build from Source

git clone https://github.com/harshit-vibes/cf.git
cd cf
make build
sudo mv build/cf /usr/local/bin/

Quick Start

# Initialize a workspace
cf init ~/codeforces-practice

# Check system health
cf health

# Parse a problem from Codeforces
cf problem parse 1 A

# View your profile
cf user info

# List recent contests
cf contest list

# Show your statistics
cf stats

CLI Commands

Core Commands

Command	Description
cf init [path]	Initialize a new workspace
cf health	Check system health and configuration
cf version	Show version information

Problem Commands (cf problem, cf p)

Command	Description
cf problem parse <contest> <index>	Parse a problem from Codeforces
cf problem list [--tag TAG] [--min-rating N] [--max-rating N]	List problems with filters
cf problem fetch <contest> [index]	Fetch problem(s) to workspace

# Parse problem A from contest 1
cf problem parse 1 A

# List DP problems rated 1200-1400
cf problem list --tag dp --min-rating 1200 --max-rating 1400

# Fetch all problems from contest 1234
cf problem fetch 1234

User Commands (cf user, cf u)

Command	Description
cf user info [handle]	Show user profile information
cf user submissions [handle] [--limit N]	Show recent submissions
cf user rating [handle]	Show rating history

# View your profile
cf user info

# View tourist's submissions
cf user submissions tourist --limit 20

# View your rating history
cf user rating

Contest Commands (cf contest, cf c)

Command	Description
cf contest list [--gym] [--limit N]	List contests
cf contest problems <contest_id>	Show contest problems

# List upcoming contests
cf contest list --limit 10

# Show problems from contest 1234
cf contest problems 1234

Statistics (cf stats)

# View your practice statistics
cf stats

# View another user's stats
cf stats tourist

Configuration (cf config)

Command	Description
cf config get [key]	Show configuration value(s)
cf config set <key> <value>	Set a configuration value
cf config path	Show config file paths

# View all configuration
cf config get

# Set your CF handle
cf config set cf_handle your_handle

# Set difficulty range
cf config set difficulty.min 1000
cf config set difficulty.max 1600

Workspace Structure

After running cf init, your workspace looks like:

workspace/
├── workspace.yaml      # Workspace manifest
├── problems/           # Problem metadata and statements
├── submissions/        # Your solutions
└── stats/              # Progress tracking

Configuration

Config Files

Configuration is stored in:

• ~/.cf/config.yaml - Main configuration
• ~/.cf.env - API credentials

Setting Up Credentials

Create ~/.cf.env:

# Get your API key from https://codeforces.com/settings/api
CF_HANDLE=your_username
CF_API_KEY=your_api_key
CF_API_SECRET=your_api_secret

# Optional: Session cookies for submissions
CF_JSESSIONID=
CF_39CE7=

Configuration Options

Edit ~/.cf/config.yaml:

cf_handle: your_handle
difficulty:
  min: 800
  max: 1400
daily_goal: 3
workspace_path: /path/to/workspace

Migration from dsaprep

If you were using the previous version (dsaprep), your configuration will be automatically migrated on first run:

• ~/.dsaprep/ → ~/.cf/
• ~/.dsaprep.env → ~/.cf.env

Your original files are preserved.

Using as a Go SDK

Installation

go get github.com/harshit-vibes/cf

Codeforces API Client

package main

import (
    "fmt"
    "github.com/harshit-vibes/cf/pkg/external/cfapi"
)

func main() {
    // Create client (no auth needed for public endpoints)
    client := cfapi.NewClient()

    // Get user info
    users, err := client.GetUserInfo([]string{"tourist"})
    if err != nil {
        panic(err)
    }
    fmt.Printf("Rating: %d\n", users[0].Rating)

    // Get problems
    problems, err := client.GetProblems([]string{"dp"})
    if err != nil {
        panic(err)
    }
    fmt.Printf("Found %d DP problems\n", len(problems))
}

Web Parser

package main

import (
    "fmt"
    "github.com/harshit-vibes/cf/pkg/external/cfweb"
)

func main() {
    parser := cfweb.NewParser()

    // Parse a problem
    problem, err := parser.ParseProblem(1, "A")
    if err != nil {
        panic(err)
    }

    fmt.Printf("Problem: %s\n", problem.Name)
    fmt.Printf("Rating: %d\n", problem.Rating)
    fmt.Printf("Samples: %d\n", len(problem.Samples))
}

Workspace Management

package main

import (
    "github.com/harshit-vibes/cf/pkg/internal/workspace"
)

func main() {
    // Open workspace
    ws := workspace.New("./my-workspace")

    // Initialize if needed
    if !ws.Exists() {
        ws.Init("My Practice", "my_cf_handle")
    }

    // List problems
    problems, _ := ws.ListProblems()
    for _, p := range problems {
        fmt.Printf("%s: %s\n", p.ID, p.Name)
    }
}

Development

Building

# Development build
make dev

# Production build
make build

# Cross-compile
make build-all

Testing

# Run tests
make test

# With coverage
make test-coverage

Project Structure

cf/
├── cmd/cf/              # CLI entry point
├── pkg/
│   ├── cmd/             # CLI commands
│   ├── tui/             # TUI components (coming soon)
│   ├── internal/
│   │   ├── config/      # Configuration
│   │   ├── health/      # Health checks
│   │   ├── workspace/   # Workspace management
│   │   ├── schema/      # Data schemas
│   │   └── errors/      # Error handling
│   └── external/
│       ├── cfapi/       # Codeforces API
│       ├── cfweb/       # Web scraping
│       └── health/      # External checks
├── Makefile
└── README.md

Roadmap

• TUI Dashboard
• Problem recommendations
• Solution submission
• Contest participation
• Progress analytics

License

MIT