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Codex vs Claude Code vs Copilot: How the Agent Harness Became the Product (2025-2026)
In 2025, AI coding tools competed on model choice and basic autonomy. Through 2026 the differences that mattered moved outward into the harness: instruction files, delegation, hooks, approvals, sandboxing, and where the agent actually runs. A dated, sourced comparison of OpenAI Codex, Anthropic Claude Code and GitHub Copilot.
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Topics Everyone Is Talking About No363
OpenAIs Cash Burn Will Be One of the Big Bubble Questions of 2026 • Show HN: 22 GB of Hacker News in SQLite • Replacing python-dateutil to Remove Six • 7 Practical std::chrono Calendar Examples C20 • runST Does Not Prevent Resources from Escaping
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Topics Everyone Is Talking About No352
Rob Pike got spammed with an AI slop act of kindness • Always bet on text • How Lewis Carroll computed determinants • How uv got so fast • The Algebra of Loans in Rust
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Topics Everyone Is Talking About No348
Maybe the Default Settings Are Too High • Automating What Backblaze Lifecycle Rules Dont Do Instantly • Microsoft Finally Retires the RC4 Encryption Algorithm