AI Coding

2 tools reviewed

6.2
MathCode Review 2026 — A Terminal Agent That Turns Plain-Language Math Into Lean 4 Proofs

MathCode (math-ai-org) is a terminal AI coding assistant with a built-in math formalization engine: give it a problem in plain English and it writes a Lean 4 theorem and attempts a formal proof. We tested the quickstart flow, the persistent Lean REPL (~0.4s compile checks after a 90s warmup), the theorem and axiom libraries, and weighed the HN reaction (49 points, 14 comments) — including the missing-license problem that blocks commercial use.

6.8
Zed DeltaDB Review 2026 — Version Control for the Agent Era, or Local History With Extra Steps?

Zed's DeltaDB records every operation between commits instead of just commit snapshots, gives each delta a stable identity, links every change to the agent conversation that produced it, and virtualizes the worktree so branching is free and mid-run. It's early access on a waitlist. We review the CRDT-based architecture, ACP agent support, the JetBrains Local History comparison, and the HN debate over whether conversation-tied version control is a breakthrough or a micromanagement trap.