A POSIX-compatible shell in pure Python — pipelines, redirections, job control, history, tab completion. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
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Updated
Apr 19, 2026 - Python
A POSIX-compatible shell in pure Python — pipelines, redirections, job control, history, tab completion. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
A Lox tree-walk interpreter in pure Python — scanner, parser, AST, evaluator, functions, closures. Crafting Interpreters in Python. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
A grep clone plus a regex engine written from scratch in Python — groups, backrefs, alternation, quantifiers. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
A working Redis server clone in pure Python — RESP protocol, transactions, streams, pub/sub, replication, ACL. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
A minimal LLM coding agent in ~280 lines of Python — Read/Write/Edit/Bash/Glob/Grep tools with an agent loop. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
A Git client in pure Python — objects, trees, commits, and a real smart-HTTP clone with packfile & delta decoding. Built in under 48 hours with Claude Code (CodeCrafters Python rank #13).
Portal — the drop-in visit layer for LLM clients. Open standard, two endpoints, zero install. 81× less schema overhead than preloaded MCP at 100 tools (measured).
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