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Infini-AI-Lab's Hermit trains a plug-in 'harness adapter' for Codex and Claude Code without touching the model

Released Oct 25 under Apache-2.0 (pip install hermit-harness), Hermit runs an RL-style loop that evolves an external adapter of instructions, skills, memory and tools while the model and harness stay frozen, then deploys it to Codex, Claude Code or Pi or exports it as a native plugin. Its best reported result is 0.795 on CL-Bench database exploration versus a 0.580 in-context baseline, but the numbers are self-reported, mostly single runs, all on GLM 5.3 Flash.

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Official MCP servers v2.2.0 ships fixes and asks npx users to patch Node after the eMudhra CA key leak

Released Oct 28, it publishes new filesystem, everything, memory, fetch, git and time packages and moves the fetch Docker image to certifi 2026.10.23, which drops two eMudhra roots after the CA's Oct 20 key disclosure. The TypeScript servers trust your own Node.js, so run 24.22.1 or 26.12.1+ (npm won't warn you), and refresh older fetch installs with uvx refresh mcp server fetch…

GitHub (modelcontextprotocol/servers)

Replit's ViBench 2.0 has agents build whole products from scratch, and the best pass only 49-65% of builds

Released Oct 28, the benchmark starts each agent on an empty project and has it build one of 17 products (modeled on apps like Uber, GitHub and Google Docs) and then add up to 18 features on its own code, graded by 544 browser test plans; GPT 6.1 Sol, GPT 6 Astra and Opus 5.5 passed every plan in only 49 65% of builds. Eight products are public on GitHub, and results sit on Fireworks' leaderboard, where no open weight model passed a full build…

Replit Blog

Ant Group open-sources Ling-3.1-flash-1019, a 560B agent-tuned MoE with 1M context under MIT

Released Oct 27 on Hugging Face with its base model, the 25B active hybrid linear MoE got extra post training for multi step tool use and scores 44 on the Artificial Analysis Intelligence Index (up from 41), at $0.30/$0.90 per million tokens. It's a server model (about 570 GB in FP8, eight H200s on SGLang), and Artificial Analysis flags it as very verbose, so real task costs run higher than the token price suggests…

Neural Brew

Adversa AI launches a runtime security platform that blocks risky coding-agent action chains

Generally available Oct 29, it watches what Claude Code, Codex, Copilot and Cursor do through an LLM/MCP gateway, harness hooks and an endpoint sensor, links the steps into a behavior graph, and blocks a dangerous chain (say, a malicious skill reading secrets and then exfiltrating them) before the last step runs. Teams can start in observe only mode, and Adversa reports a 0.2 ms median blocking decision at one financial institution deployment (product page)…

Adversa AI (PR Newswire)

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