~/reading

37

Issue 37/September 10, 2026/20 tools · 3 headlines

MicroVM sandboxes and team control planes that contain agent fleets

Power users are wiring isolation first: local microVMs, Kubernetes control planes, and gateway-enforced team harnesses that keep credentials and blast radius outside the model loop. Clone these to run parallel agents safely without leaning on closed IDEs.

01 — Power tools

The stack

  1. 01harnessGitHub
    OneCLI

    onecli

    Open-source sandboxed agent harness for teams that gives every employee an isolated personal agent with gateway-injected credentials and policy enforcement.

    Use caseUse it to provision per-employee agents behind a single org policy so secrets never enter agent context while still allowing Slack and dashboard control.

    sandboxteamsgatewaypolicy
  2. 02toolGitHub
    Mastra

    mastra-ai

    Modern TypeScript framework for building production AI agents and workflows with model routing, memory, MCP, evals, and sandbox-backed workspaces.

    Use caseUse it to scaffold a full agent app with suspend-resume workflows and Observational Memory that you can drop into Next.js or run standalone.

    typescriptworkflowsmcpagents
  3. 03toolGitHub
    AgentBox

    madarco

    CLI that launches parallel coding agents inside dedicated sandboxed VMs (local Docker or cloud) with checkpoints, screen sharing, and credential isolation.

    Use caseUse it to spin multiple Claude or Codex sessions in isolated boxes so one runaway agent cannot touch your host git credentials or filesystem.

    vmparallelclisandbox
  4. 04repoGitHub
    microsandbox

    superradcompany

    Local-first microVM runtime and multi-language SDKs that give agents hardware-isolated environments with OCI images, secrets brokering, and MCP support.

    Use caseUse it to embed sub-second microVMs in your agent loop so untrusted code runs with its own kernel without Docker daemon overhead.

    microvmlocal-firstsdkisolation
  5. 05repoGitHub
    SmolVM

    CelestoAI

    Secure persistent microVM computers for long-running agents with sub-second boot, browser, code execution, and state that survives sessions.

    Use caseUse it to give each agent a durable computer that boots fast, persists files, and can be snapshotted for fleets of Grokbot-style workers.

    microvmpersistentcomputer-useagents
  6. 06toolGitHub
    sandbox-sdk

    opencoredev

    Typed TypeScript SDK that unifies local, E2B, Daytona, Vercel Sandbox, Railway and other providers behind one createSandbox API.

    Use caseUse it to write agent code once and switch sandbox backends from local AgentOS VMs to hosted providers without rewriting execution calls.

    sdkmulti-providertypescriptsandbox
  7. 07harnessGitHub
    boxxkite

    EvAlssment

    Self-hostable agent sandbox with full bash/python/file tool surface, control plane, four SDKs and MCP server on real Kubernetes pod isolation.

    Use caseUse it to point any agent framework at a batteries-included sandbox you run yourself with non-root pods and deny-by-default egress.

    kubernetesself-hostmcptools
  8. 08harnessGitHub
    Agent Substrate

    agent-substrate

    High-density control plane for agent sandboxes that multiplexes many idle agents onto fewer workers with sub-second suspend/resume over Kubernetes.

    Use caseUse it to schedule large fleets of agent actors onto shared workers so cold starts stay low while density stays high for RL or evals.

    control-planekubernetesmultiplexlifecycle
  9. 09harnessGitHub
    Agent Control

    agentcontrol

    Centralized runtime control plane that wraps model and tool calls with configurable evaluators to block injections, PII and policy violations.

    Use caseUse it to enforce org-wide guardrails on LangChain, CrewAI or Strands agents via a single @control decorator without redeploying every agent.

    guardrailspolicyruntimecontrol-plane
  10. 10harnessGitHub
    agentcontrolplane (ACP)

    humanlayer

    Kubernetes-native Agent Control Plane for outer-loop agents with durable checkpoints, async tool calls, human feedback and full MCP support.

    Use caseUse it to run unsupervised long-running agents that pause on tool calls, checkpoint conversations, and resume after human approval gates.

    kubernetesdurablemcpouter-loop
  11. 11toolGitHub
    AgentCLI

    happyvibing

    One CLI that turns any MCP server or OpenAPI spec into dynamic commands so agents discover tools on demand instead of loading every schema.

    Use caseUse it to keep agent context lean by registering MCP and REST backends once then calling only the tools needed per turn from the shell.

    climcpopenapitools
  12. 12repoGitHub
    E2B

    e2b-dev

    Open-source secure cloud sandboxes with real tools for enterprise agents, Firecracker isolation, and self-hostable infrastructure.

    Use caseUse it to run agent-generated code in disposable microVMs with Python and JS SDKs while keeping the rest of your stack on your laptop.

    sandboxfirecrackercode-executionself-host
  13. 13repoGitHub
    smolvm-sdk

    smol-machines

    Official multi-language SDKs for smolVM lightweight microVM sandboxes focused on secure agent code execution.

    Use caseUse it to create, exec, and tear down microVMs from Node or Python in under a second for tight agent feedback loops.

    sdkmicrovmpythontypescript
  14. 14toolGitHub
    gpt-researcher

    assafelovic

    Autonomous deep-research agent harness that produces citation-grounded reports from web and local sources with multi-agent modes.

    Use caseUse it to spin a research loop that gathers sources, debates findings, and writes a verifiable report without hand-holding every query.

    researchmulti-agentcitationsharness
  15. 15harnessGitHub
    Agent Harness Core

    phenomenoner

    Self-hosted Rust runtime for durable long-horizon agent tasks with virtual sessions, sandboxed reasoning jobs, and auditable receipts.

    Use caseUse it to leave an agent running on hard multi-day work where continuity, compaction, and recovery are first-class and every step is receipted.

    rustdurablelong-horizonreceipts
  16. 16harnessGitHub
    omnara

    omnara-ai

    Open-source managed-agent platform that handles durable execution and state while you choose models, tools, machines and interaction surfaces.

    Use caseUse it to launch profile-defined coding agents on Blaxel, Daytona or your own VMs with crash recovery and multi-machine attachment.

    manageddurableprofilesmulti-machine
  17. 17repoGitHub
    Prismor

    community

    Curated control-plane resources plus runtime hooks that intercept dangerous commands and secret leaks before coding agents execute them.

    Use caseUse it to discover and wire policy hooks that sit outside Claude Code or Codex so risky shell calls are blocked at the gateway.

    control-planepolicyawesome-listhooks
  18. 18repoGitHub
    Cleanroom / smol-machines patterns

    fhiltscher et al.

    Security-first ranked list of agent sandboxes emphasizing deny-default egress, secrets brokering and isolation strength.

    Use caseUse it to pick a sandbox whose egress and secrets model match your threat model before you wire the agent loop.

    sandboxsecurityegressawesome-list
  19. 19repoGitHub
    boxlite / microsandbox family

    various

    Living index of portable self-contained sandboxes including microVMs, containers and isolation harnesses for coding agents.

    Use caseUse it to survey local-first options like BoxLite and microsandbox then clone the one that matches your OS and density needs.

    awesome-listmicrovmisolationlocal
  20. 20toolHN / product
    Adios.dev sandboxes

    clovis818

    Fast isolated execution sandboxes aimed at AI agents with low cold-start latency for code and tool loops.

    Use caseUse it to give agents disposable runtimes that spin up quickly for eval batches or one-shot code execution without long-lived VMs.

    sandboxfastexecutionagents

02 — In the wild

Articles and releases

  1. releaseGitHub Releases
    OneCLI 2.6 ships outbound channel capabilities and approval loops

    onecli

    Version 2.6.0 adds outbound channel capabilities on an approval loop so team agents can request human sign-off inside chat before acting. The release continues the v2 focus on per-employee sandboxes, gateway credential injection, and fail-closed policy.

    releaseteamsapprovalharness

    Shipped

  2. releaseHacker News
    Adios.dev launches fast isolated sandboxes for AI agents

    clovis818

    Adios.dev appeared on HN as a fresh option for fast isolated execution environments tailored to agent workloads. It targets low-latency sandboxes that agents can spin for code and tool use without heavy cold starts.

    releasesandboxhnexecution

    Shipped

  3. articleDevOps.dev
    How to Sandbox AI Coding Agents: 8 Tools for 2026

    DevOps.dev

    The piece argues that harness attention has outrun boundary attention and walks through eight concrete sandbox and isolation options. It highlights seatbelt, bubblewrap, microVMs and provider sandboxes as the layer that actually decides whether an agent can hurt you.

    articlesandboxsecurity2026

    Read

Get the daily tools digest

RSS