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In-process agent OSes and durable control planes over disposable sandboxes
Today's clone-and-run stack favors Rust and Go runtimes that embed isolation, policy, and multi-agent rooms inside your process or cluster instead of renting another microVM. Power users wire these control planes, OS sandboxes, and unified harness routers into long-lived loops.
01 — Power tools
The stack
- 01toolGitHubOpenFang↗
RightNow-AI
Single-binary Rust Agent OS with channels, skills, providers, scheduled Hands, and a local dashboard.
Use caseUse it to run always-on autonomous agents from one ~32MB binary without a Python dependency tree.
rustagent-ossingle-binary - 02repoGitHubIronClaw↗
nearai
Privacy and security focused Agent OS in Rust with extensible channels, WASM lanes, and supervised autonomy.
Use caseUse it to self-host a multi-channel personal agent stack with OS-level sandbox defaults.
rustprivacyagent-os - 03harnessGitHubRebuno↗
rebuno
Production execution runtime that records every tool and LLM call as durable steps with YAML policy gates.
Use caseUse it to resume interrupted multi-framework agents from Postgres event logs with approval holds.
durablepolicygo - 04toolGitHuboh-my-agentic-coder↗
TNG
Harness-agnostic Go CLI that sandboxes coding agents with Seatbelt, bubblewrap, and Landlock while bridging skills and secrets.
Use caseUse it to confine OpenCode, Pi, or CodeWhale sessions so the harness never holds raw secrets.
sandboxgoos-primitives - 05harnessGitHubAgentOS (smartcomputer)↗
smartcomputer-ai
Rust harness for self-evolving agents with deterministic replay, signed receipts, and governed self-modification.
Use caseUse it to let agents propose and apply harness changes under audit trails and simulation gates.
self-modifyingrustgovernance - 06harnessGitHubHarnessRouter↗
HarnessRouter
Self-hosted unified API that turns existing coding harnesses into backends via the Unified Harness Protocol.
Use caseUse it to route product tasks across Codex, Hermes, and Pi through one session-aware OpenAI-compatible endpoint.
routeruhpself-hosted - 07toolGitHubPrime Agent↗
PrimeIntellect-ai
Self-improving RLM coding and research agent with a continual harness for durable skills, memory, and subagents.
Use caseUse it to run long-horizon research loops where context lives as REPL variables and refinable harness state.
rlmresearchcontinual - 08harnessGitHubOpenRig↗
mvschwarz
YAML-defined multi-agent rig that boots mixed coding harnesses as a coordinated team.
Use caseUse it to declare Claude-side and Codex-side agents in one config and launch them together.
multi-agentyamlorchestration - 09toolGitHubllmfit↗
AlexsJones
Rust CLI and TUI that scores which local LLMs fit your CPU, RAM, and GPU before you wire them into agents.
Use caseUse it to pick quantizations and runtimes that actually sustain agent loops on your hardware.
local-llmhardwaretui - 10toolGitHubagent-browser↗
vercel-labs
Rust agent browser infrastructure aimed at fast, scriptable browser control for agent loops.
Use caseUse it to give coding or research agents a low-latency browser surface without a full desktop stack.
browserrustinfra - 11repoGitHubrig↗
0xPlaygrounds
Rust agent framework for composing model providers, tools, and agent loops with strong typing.
Use caseUse it to build custom systems-language agents that share one provider-agnostic core.
rustframeworkagents - 12harnessGitHubAgent Reliability Harness↗
SUNRNEHUI
Plan-native continuity layer with intent-to-contract synthesis, durable handoff, and evidence-based acceptance.
Use caseUse it to keep multi-session coding work portable across model and runtime boundaries with audit modes.
continuitycontractsacceptance - 13harnessMicrosoft LearnMicrosoft Agent Framework Harness↗
Microsoft
Batteries-included harness agent for research, coding, and long-running work over any chat client.
Use caseUse it to wrap an IChatClient into sessioned multi-step agents with approval and context controls.
dotnetpythonharness - 14toolGitHubaichat↗
sigoden
All-in-one Rust LLM CLI with shell integration, RAG, and agent-style tool use suitable as a thin local harness.
Use caseUse it to script provider-agnostic tool loops from the terminal without a heavy IDE agent.
clirustllm
02 — In the wild
Articles and releases
- articlefreeCodeCampWhat Is an Agent Harness? The Architecture Behind Modern Coding Agents↗
freeCodeCamp
Explains the harness as the runtime that decides recovery, tool policy, and context around a model core. Argues builders should treat harness choice as first-class infrastructure rather than an afterthought wrapper.
harnessarchitectureessayRead
- articleThe New StackHarness rebuilt its Git repository for nonstop AI agent traffic↗
The New Stack
Engineering writeup on how agent-generated PR floods forced deeper Git and review pipeline changes. Covers why enterprises are loosening gates while still needing governance around agent traffic.
engineeringgitcode-reviewRead
- releaseOpenAIIntroducing the Agents API↗
OpenAI
Product drop for a managed Agents API powered by the Codex harness for orchestration, long-running sessions, and tool use. Positions cloud agents as a launch path for teams that want hosted control without owning the full runtime.
releaseapicloud-agentsShipped