IdeaWell

Project ideas from Hacker News discussions.

Mxc: Microsoft Execution Containers version 1.0.0

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

Theme 1 – Traditional multi‑user security (UID/GID) is outdated
Many commenters argue that the old “root/non‑root” or per‑user permission model no longer provides real isolation for modern workloads.

“The same‑machine‑multi‑user security paradigm has been dead for a long time… root/non‑root split is almost entirely used as a 'don't let people accidentally shoot themselves in the foot'… The uid/gid concept is an antique from the 80s that stopped working a long time ago.” – eddythompson80

Theme 2 – Need for fine‑grained, per‑agent sandboxing
Participants repeatedly call for stronger, managed execution boundaries that limit what an agent (or app) can do, rather than relying on user accounts alone.

“Without a managed execution boundary, the agent may decide that changing the server configuration is the fastest way to complete the task and potentially break the production site.” – Joker_vD
“I’ve been locking down agents by running them as untrusted users… I really want a local hashicorp‑like vault that I can give agents specific access permissions.” – tomrod

Theme 3 – Enterprise‑only security features leave consumers behind
Several users note that advanced security capabilities are gated to paying/corporate customers, while everyday software remains permissive.

“Naturally, this will be gated to corporate customers - the plebs do not get access to better security unless they pay for a top tier license.” – 3eb7988a1663
“Microsoft security is bimodal… consumer applications are a joke… permission model is a modal, 'Do you trust this?' binary choice.” – 3eb7988a1663

🚀 Project Ideas

AgentPolicy

Summary

  • A declarative sandboxing tool that lets developers define fine‑grained capabilities (filesystem, network, syscalls) for any agent or container using Linux namespaces, seccomp, and eBPF, backed by a local Vault‑style secret store.
  • Core value: prevents agents from escaping their intended scope (e.g., changing server configs, reading SSH keys) without heavyweight VMs.

Details

Key Value
Target Audience Developers, DevOps, security engineers who run agents, CI jobs, or local dev tools
Core Feature Policy‑driven isolation: YAML defines allowed paths, ports, syscalls; agent runs inside a restricted namespace with automatic secret injection
Tech Stack Rust (libseccomp, nix), eBPF via libbpf, WASM for policy evaluation, optional gRPC API
Difficulty Medium
Monetization Revenue-ready: Hosted SaaS tier ($10/user/mo) + self‑hosted Enterprise license

Notes

  • HN users complained about agents being able to “change the server configuration” and wanted a “local hashicorp‑like vault that I can give agents specific access permissions” (tomrod). AgentPolicy gives exactly that.
  • Provides a practical alternative to heavy VMs; can be used to lock down npm install, music players, or dev container processes, sparking discussion on least‑privilege agent design.

PerUserEgress

Summary

  • A cross‑platform daemon that enforces per‑user outbound network policies using OS‑native packet filters (Windows Filtering Platform, nftables, PF) integrated with directory services (AD/LDAP) for identity mapping.
  • Core value: lets organizations restrict which IP ranges or services a specific user (or service account) can reach, without deploying full‑blown proxy stacks.

Details

Key Value
Target Audience Enterprise IT, security ops, SaaS providers needing user‑level egress control
Core Feature Identity‑aware egress rules: map Windows/Linux/macOS users to policy sets that drop or allow traffic to defined CIDRs/ports
Tech Stack Go (core), eBPF/XDP for Linux, WFP driver for Windows, PF via subprocess for macOS, gRPC control plane, SQLite for policy storage
Difficulty High
Monetization Revenue-ready: Per‑seat licensing ($8/user/mo) with optional cloud‑managed controller

Notes

  • Commenters asked “Can you restrict accessible IP ranges by user?” (MrBuddyCasino) and noted the pain of “bringing an entire MS tech stack from the mid 2000s” to achieve this (eddythompson80). PerUserEgress solves it with a lightweight, modern approach.
  • Enables discussion on zero‑trust networking and could be adopted in dev environments to limit container host exposure, providing clear practical utility.

DevContainerLeastPriv

Summary

  • A VS Code Remote Containers extension that automatically generates minimal AppArmor/seccomp profiles and injects a side‑car vault agent, granting dev containers only the filesystem, network, and secret access defined in a simple policy file.
  • Core value: eliminates over‑privileged dev containers (e.g., preventing npm install from reading SSH keys) while preserving developer ergonomics.

Details

Key Value
Target Audience Developers using VS Code Remote Containers, GitHub Codespaces, or similar dev‑container workflows
Core Feature Policy‑driven container hardening: YAML specifies allowed dirs, network endpoints, and secret paths; extension builds profile and launches container with runcrun/sc
Tech Stack TypeScript/VS Code extension, Go agent for profile generation, OCI runtime (crun/runsc), libseccomp, optional HashiCorp Vault agent sidecar
Difficulty Medium
Monetization Hobby (open‑source) with optional paid support/consulting

Notes

  • HN users wanted to “lock down that my music player has no ability to read my SSH keys” and to “integrate this with dev containers” (tuwtuwtuwtuw). DevContainerLeastPriv gives exactly that, addressing the desire for fine‑grained permissions in dev environments.
  • Sparks conversation about shifting security left into the developer toolchain and offers a practical utility that can be adopted immediately in existing Codespaces or local dev setups.

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