Hacker News: vrn21

New comment by vrn21 in "Ask HN: Who wants to be hired? (May 2026)"

vrn21 — Fri, 01 May 2026 16:51:49 +0000

  Location: India
  Remote: Yes
  Willing to relocate: Yes
  Technologies: Rust, Python, Docker, Linux, Terraform, K8s, Sandboxes
  Résumé/CV: vrn21.com/resume
  Email: hello@vrn21.com

I'm KV, an upcoming grad, previously built rl envs + infra at verita-ai.com, hud.ai (YC W25), mecha.so and fileago.com

And built some projects like: sandbox for agents with firecracker and rust [ https://github.com/vrn21/bouvet ] ; a key value store in rust[ https://github.com/hrefto/shorterdb ]; a serverless FaaS platform with WASM and rust [ https://github.com/orbit-serverless/server ]; a postgres extension with pgrx for full text search using tantivy, bm25, rust [ https://github.com/vrn21/pdb ]

New comment by vrn21 in "Ask HN: Who wants to be hired? (April 2026)"

vrn21 — Tue, 14 Apr 2026 20:54:27 +0000

  Location: India
  Remote: Yes
  Willing to relocate: Yes
  Technologies: Rust, Python, Docker, Linux, Terraform, K8s, Sandboxes
  Résumé/CV: vrn21.com/resume
  Email: hello@vrn21.com

I'm KV, previously built rl envs + infra at verita-ai.com, hud.ai (YC W25), mecha.so and fileago.com

New comment by vrn21 in "Show HN: How to train and run models with RL Envs"

vrn21 — Sat, 07 Mar 2026 15:12:44 +0000

the link is over here, somehow link changed on its own : https://vrn21.com/blog/rl-env

Show HN: How to train and run models with RL Envs

vrn21 — Sat, 07 Mar 2026 14:59:34 +0000

Article URL: https://astrofolio.pages.dev/blog/rl-env/

Comments URL: https://news.ycombinator.com/item?id=47288226

Points: 1

# Comments: 1

New comment by vrn21 in "Ask HN: Who wants to be hired? (March 2026)"

vrn21 — Tue, 03 Mar 2026 09:27:37 +0000

  Location: India
  Remote: Yes
  Willing to relocate: Yes
  Technologies: Rust, Python, Docker, Linux, Terraform, K8s, Sandboxes
  Résumé/CV: vrn21.com/resume
  Email: hello@vrn21.com

I'm KV, upcoming grad, previously interned at 3 startups [1x YC], where most of my work has revolved around Systems [Rust, Python, Docker, Linux]; You could see more info at my resume: [vrn21.com/resume]

And I've built some projects like: sandbox for agents with firecracker and rust [ https://github.com/vrn21/bouvet ] ; a key value store in rust[ https://github.com/hrefto/shorterdb ]; a serverless FaaS platform with WASM and rust [ https://github.com/orbit-serverless/server ]; a postgres extension with pgrx for full text search using tantivy, bm25, rust [ https://github.com/vrn21/pdb ]

New comment by vrn21 in "Show HN: BVisor – An Embedded Bash Sandbox, 2ms Boot, Written in Zig"

vrn21 — Tue, 24 Feb 2026 07:43:11 +0000

from a utilitarian perspective, can we swap this instead of a e2b or some other provider? since this doesnt require n number of micrvovm kernals and rootfs hanging round?

New comment by vrn21 in "Show HN: BVisor – An Embedded Bash Sandbox, 2ms Boot, Written in Zig"

vrn21 — Mon, 23 Feb 2026 20:37:21 +0000

so user gets all of the dependencies and apps in userspace to run as well? but each of the command runs in its own more secure shell of some sorts?

New comment by vrn21 in "Show HN: I built a macOS app that toggles between extended/mirrord monitor setup"

vrn21 — Fri, 13 Feb 2026 17:23:21 +0000

no on noticing it?

Show HN: I built a macOS app that toggles between extended/mirrord monitor setup

vrn21 — Fri, 13 Feb 2026 14:03:12 +0000

When my external power connection to Monitor stops (due to some outage) Mac still extends it display. So I'd either need to unplug my hdmi or go change it to mirror from settings (which takes too much time tbh) to resume my work.

With this app I just hit Switch to Internal Only, keep working on my MacBook screen, and later click Restore Extended when everything is working again.

Comments URL: https://news.ycombinator.com/item?id=47002824

Points: 2

# Comments: 1

New comment by vrn21 in "Ask HN: Who wants to be hired? (February 2026)"

vrn21 — Wed, 11 Feb 2026 13:35:27 +0000

Location: India Remote: Yes Willing to relocate: Yes to anywhere (if provided with VISA) Technologies: Rust, Python, Docker, Terraform, Linux, Infra/Systems/Backend Résumé/CV: vrn21.com/resume Email: hello [at] vrn21 [dot] com

upcoming grad with 3 prior internships [1x yc]: rl envs, linux, filesystems. recently built a sandbox for agents with rust and firecracker as well btw: github.com/vrn21/bouvet

New comment by vrn21 in "Show HN: EpsteIn – Search the Epstein files for your LinkedIn connections"

vrn21 — Wed, 04 Feb 2026 19:55:30 +0000

link not found btw

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 21:16:00 +0000

lol thanks for the compliments, generated both the testimonials after giving the mcp server to both opus and gemini and asked their feedback on it.

it is supposed to be directly used by agents, so they are kind of my end users, hence it made sense to get their testimonials :)

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 21:13:29 +0000

my ideal scenario is a cloud web model getting access to a sandbox to run commands and read/write to files. but yeah it could be used as an alternative to bash and read write tools.

I did not get your second question exactly, but yeah microvms can be considered one of the secure ways to run your agent

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 21:07:58 +0000

every syscall on containers run on the kernal with full privelages, so if needed one can break out of the container and get access to the host

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 21:00:30 +0000

Luis wrote an excellent blog about it btw: https://www.luiscardoso.dev/blog/sandboxes-for-ai

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 20:58:21 +0000

yes this is pretty busy market, but it is just pure infra/OS problem and many of it has already been solved in the past decades, right now its just who can fit everything together fastest

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 20:56:15 +0000

Thanks for the compliments! I can't really say that it has a unique differentiator between all the other sandboxes out in the market, this was supposed to be a poc version on how i could be building a sandbox for agents, this had been haunting me since a few months, tried out what could happen!

the actual sandboxes in the market are doing a lot of work in optimizing the system end to end, and most of it is pretty hard. this project just scratches the surface

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 20:29:49 +0000

hi, you could find my socials at https://vrn21.com, feel free to dm :)

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 20:28:15 +0000

using sandboxes makes a lot of sense now a days, but this is nowhere near the prod sandboxes the market has, they have a lot of work and optimizations going on! but yeah its little fun side project! thanks for the compliments :)

New comment by vrn21 in "Show HN: I Built a Sandbox for Agents"

vrn21 — Wed, 28 Jan 2026 20:24:57 +0000

tbh, this is kind of a gray area, i should have thought little bit more on how it should have been architectured,

for me this was the ideal scenario: a cloud model on web with its own sandbox (something like claude with read/write to files and run commands)

i dont really think this could be considered as a fox guarding the hen house, its not that ai wants to infect your computer with its commands, if ai is provided the mcp server, it will it instead of using the tools like bash in most cases [if in a local setup]. I feel its more of a lumberjack guarding his weapons.