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AI Coding Agents

403 summarised stories about AI Coding Agents, each linking back to the original source. Browse all topics →

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Thursday, 17 September 2026

GitHub and Anthropic used their own agents for major Rust rewrites — with very different playbooks

The New Stack 1 month ago 24

GitHub rewrote the GitHub Copilot agent runtime from TypeScript/Node.js into production Rust using its own Copilot coding agents, while Anthropic reported a separate large Rust rewrite for Bun using multiple Claude Code agents. The GitHub migration totaled more than 800,000 lines of Rust delivered via 128 pull requests over about 14-and-a-half weeks. These efforts shift major Rust migrations from longer, disruption-heavy manual rewrites toward agent-assisted workflows with incremental or parallelized playbooks.

Soup (GitHub Repo)

GitHub 1 month ago 28

Soup’s v0.75.0 release adds stricter config validation and updates training behavior across backends for its LLM fine-tuning workflow. It makes unknown config keys fail to load in v0.75.0, with the prior behavior being silently ignored. It also changes GRPO support by replacing a padding-token centering heuristic with gspo and adjusts MLX-only metric recording and UI auth requirements.

Ouroboros (GitHub Repo)

GitHub 1 month ago 13

Ouroboros (a GitHub project) proposes an “Agent OS” for AI coding that locks a specification before code execution and records actions for replayable, observable runs. The install command is curl -fsSL https://raw.githubusercontent.com/Q00/ouroboros/main/scripts/install.sh | OUROBOROS_INSTALL_REF=readme-hero bash. As a result, coding workflows shift from ad-hoc prompt instructions to an interview→crystallize→execute→evaluate→evolve process using shared primitives, with domain steps added via plugins.

Refactoring Hermes with 1,393 agents

NOUS RESEARCH 1 month ago 6

Teknium used Hermes Agent to refactor the open-source Hermes repository by dispatching 1,393 subagents to simplify and reorganize about a million lines of non-test Python. The main run took 19 active hours and reduced non-test Python source by 34.4%. As a result, a PR was merged (with fixes through Sep 4), the codebase shrank substantially, and Hermes updated its skills and team guidance so future refactors can be done faster and more consistently.

VibeDefend by CybeDefend

Product Hunt 1 month ago 40

CybeDefend launched VibeDefend to provide security that runs inside AI coding agents while they write code. The product installs with one command on agents including Claude Code, Cursor, Windsurf, Copilot, and Codex, and it offers a free plan with no card. This adds diff-time scanning and a guard that blocks commands like rm -rf, sudo, and secret reads before changes run.

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