freeCodeCamp guide rebuilds the AI-native SDLC with Claude Code, Codex, and Gemini CLI
Roger_M_Taylor · x · 2026-09-09
freeCodeCamp published a hands-on guide by Rudrendu Paul on how AI engineers and forward-deployed engineers rebuild the software development lifecycle around Claude Code, Codex, and Gemini CLI.
Key points:
- METR's measurements show the software task length an AI agent can complete autonomously has doubled roughly every 7 months since 2019 — moving from "finishes a function" to "finishes a feature" and, on current trajectory, "finishes a sprint."
- Adoption is already the default: Google Cloud/DORA's 2025 report found 90% of developers use AI at work and 80%+ report productivity gains, though 30% still distrust model-written code; Stack Overflow's 2025 survey puts habitual use at 84%, with about half of professionals using AI tools daily.
- The guide walks through Plan, Design, Build, Test, Deploy, and Maintain with practical configs and agentic workflows for each stage.
The core mismatch it addresses: AI-assisted coding skipped the novelty phase, but most teams still run an SDLC built for the previous default.
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