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Simon Willison releases llm-coding-agent alpha powered by GPT-5.5

By PulseAugur Editorial · [2 sources] ·

Simon Willison has developed a new Python library, llm-coding-agent, which functions as an agent framework for AI-powered coding tasks. The agent, built using the "llm" library and powered by GPT-5.5, can generate project specifications, write code through red/green TDD, and manage files and commands. It includes tools for editing, executing, listing, reading, searching, and writing files, and can be invoked via the command line or a Python API. Willison has released a "slop-alpha" version to PyPI for public testing. AI

IMPACT This tool could streamline AI-assisted software development workflows.

RANK_REASON This is a new library/tool release, not a frontier model release from a major lab.

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AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Simon Willison releases llm-coding-agent alpha powered by GPT-5.5

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COVERAGE [2]

  1. Simon Willison TIER_1 English(EN) ·

    llm-coding-agent 0.1a0

    <p><strong>Release:</strong> <a href="https://github.com/simonw/llm-coding-agent/releases/tag/0.1a0">llm-coding-agent 0.1a0</a></p> <p>Another Fable 5 experiment. Now that my <a href="https://llm.datasette.io/">LLM library</a> has evolved into more of an agent framework it's time…

  2. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    llm-coding-agent 0.1a0 https://simonwillison.net/2026/Jul/2/llm-coding-agent/#atom-everything # AI # LLM # OpenSource

    llm-coding-agent 0.1a0 https://simonwillison.net/2026/Jul/2/llm-coding-agent/#atom-everything # AI # LLM # OpenSource

    LINKS simonwillison.net/…/llm-coding-agent

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