lean-ctx: local AI Value Gate with withdrawn benchmark
yvgude/lean-ctx is an Apache-2.0 Rust binary that compresses reads, proxies requests, and tracks costs across 30+ AI coding agents — but its headline benchmark is withdrawn.
OpenAI launches Agents API: managed Codex harness
OpenAI's Agents API brings the open-source Codex harness to a managed API, letting developers run cloud agents with pay-per-use pricing and sandbox partner options.
reverify: deterministic tools judge AI claims
2akouwu/reverify pairs an LLM with a deterministic verifier: model proposes, tools check bytes, only VERIFIED claims survive. Lossless rollover replaces compaction.
Anthropic previews the Model Hardware Standard for lab AI agents
Anthropic opens a research preview of the Model Hardware Standard, a driver spec for AI agents to run lab instruments. Built with HHMI Janelia and partners Genentech, UW, and CMU.
context-mode: 98% context savings across AI coding agents
mksglu/context-mode is a 19.4k★ MCP server with 98% tool-output savings, SQLite/FTS5 session-continuity, and 17 supported agent platforms — under an ELv2 license.
Google Interactions API reaches GA for Gemini
Google promoted the Interactions API to general availability on 2026-06-22: stable schema, Managed Agents, background=True, and the 'From Roles to Steps' migration. Default in AI Studio.
Ratel: BM25 tool catalog cuts AI agent context spend 87%
Ratel (ratel-ai/ratel, 186★, Apache-2.0 core + MIT SDKs) ships an in-process BM25 tool catalog. On BFCL v3: ~87% fewer tokens, tool selection within ±5 points.
cognee: open-source AI memory platform for agents
cognee is an Apache-2.0 open-source AI memory platform for agents: a self-hosted knowledge graph engine with a four-method API (remember, recall, forget, improve) and a Claude Code plugin.
CodeBurn: free, local-first cost tracker for 31 AI coding tools
CodeBurn (getagentseal/codeburn) reads the session files your AI coding tools already write, breaks down every token and dollar across 31 integrations, MIT, no proxy, no API key.
oh-my-pi: a terminal agent that treats the harness as the product
can1357/oh-my-pi: a Rust-based terminal AI coding agent (fork of Mario Zechner's pi-mono) with Hashline edits, an advisor model, 40+ providers, 18-hour release cadence.
codebase-memory-mcp: zero-dep code intelligence
Pure-C, single-binary MCP server that indexes a codebase into a Tree-Sitter knowledge graph in milliseconds. 13.3k stars, MIT, 5,604 tests, 11 agents. arXiv 2603.27277 reports 83% quality at 10× fewer tokens.
Headroom: open-source token compression for AI agents
Headroom v0.27.0 is an Apache-2.0 context-compression layer for AI agents: library, proxy, agent wrapper, and MCP server. Published savings reach 92% on code search and SRE debugging.
caveman: terse-output skill, 75k stars in 11 weeks
GitHub JuliusBrussee/caveman: a TypeScript skill for 30+ agent platforms that asks the agent to drop filler. 75k stars, MIT, 65% output-token reduction.
Google launches Gemini Spark, a 24/7 cloud agent
Google's May 19, 2026 launch of Gemini Spark: a 24/7 cloud agent on Gemini 3.5 + Antigravity, integrated with Workspace, connected to Canva/OpenTable/Instacart via MCP.
smolagents: Hugging Face's Code-First Python Agent Library
Hugging Face's open-source Python agent library where the model writes executable code instead of JSON. 27.8k stars, Apache 2.0, v1.26.0 (May 29, 2026). Remote sandboxing is mandatory.
didilili/ai-agents-from-zero: a Chinese MIT AI agent guide
MIT Chinese guide from Datawhale with 27 chapters on LangChain, LangGraph, MCP, RAG, Skills, and fine-tuning. 1.9k stars, two completed projects in May 2026. Code is Python; prose is Chinese.