Yurii Kostiuk 🇺🇦

Lead Security Architect at PETRONAS

[Yurii Kostiuk 🇺🇦 @yukostiuk]

7/ Limits: no browser, no vision, no image generation. It needs a model that supports tool calls. Tested on Flint 2, Brume 2 and Beryl AX (512 MB with a USB stick). Reports from other aarch64 routers are welcome.

[Yurii Kostiuk 🇺🇦 @yukostiuk]

6/ Runs next to AdGuard Home, Tor, Transmission and vnstat, with their working data in RAM. The model runs elsewhere, through any OpenAI-compatible provider or a ChatGPT subscription.

[Yurii Kostiuk 🇺🇦 @yukostiuk]

5/ Measured on Flint 2 (eMMC, 30-minute windows, projected to a day): idle agent about 0.5 GB of writes per day, 0.05 to 0.15 GB without it. One conversation adds 2.5 to 4 MB. Life counter: 0 to 10 percent used.

[Yurii Kostiuk 🇺🇦 @yukostiuk]

4/ Release 0.21.5-r14 (2026-10-09): the agent checks that a service it started is really running, and reads package settings with secrets hidden. Full 15-check install and unlock scenario: Brume 2 15/15, Beryl AX with a USB stick 15/15, Flint 2 15/15 (after recovery).

[Yurii Kostiuk 🇺🇦 @yukostiuk]

3/ Router changes need an unlock with a PIN or an app code. The PIN message is deleted before the model sees it. A change it cannot confirm rolls back by itself in about 90 s, including after a reboot.

[Yurii Kostiuk 🇺🇦 @yukostiuk]

2/ Ask "why is the internet slow?" and it pings the gateway and the internet over IPv4 and IPv6, checks DNS, ports and errors, then answers with what it saw. Five commands in 18 to 25 s on Flint 2 and Brume 2 (measured 2026-09-25).

[Yurii Kostiuk 🇺🇦 @yukostiuk]

1/ Hermes Agent 0.21.5 running natively on an OpenWrt router (package 0.21.5-r14): a Telegram assistant that diagnoses the network, watches it quietly, and changes settings only after an unlock. Open source, MIT. https://t.co/zgPBVAlNJP

[Yurii Kostiuk 🇺🇦 @yukostiuk]

@sternenko Купуєш кросівки Hoka Gaviota і ходиш швидкою ходою… можна із палицями для «скандинавської хотьби»… Біг з проблемами призведе до відмови або здоровʼя, або психіки….)))

[Tania Fedirko 🇺🇦 @TaniaFedirko]

Feeling AI costs spiraling out of control?
My new article “FinOps for AI-A Practical Guide” is live!
It explains why classic FinOps doesn’t fully apply to GenAI - and offers a step-by-step approach to regain cost control.
https://t.co/F4KHzCCvgB

#FinOpsForAI #CostManagement #AI

[Yurii Kostiuk 🇺🇦 @yukostiuk]

@realTrumpNewsX Ones more “Dovboyob!” 😎

[Natalie Godec 🇺🇦 @ouvessvit]

A very fun day at #DevFestScotland 🫰 Thank you @cleyrauc @hitRECordJoe @pattyneta and the rest of GDG #Glasgow for the wonderful #DevFest! Lovely meeting so many people - and a big group of Ukrainians 🇺🇦 Lots of laughs, and a Christmas episode of #ChatGDG with @StefanoLePera ✨

[Yurii Kostiuk 🇺🇦 @yukostiuk]

@nalibergmann жесткий трензель😎😎😎

[Martin Sauer @Martin_Sauer]

One #Tomahawk for Ukraine for every dead #Ukraine civilian. With unrestricted targeting in Russia.

War crimes by #Russia would stop immediately.

[UNITED24 @U24_gov_ua]

Bravo, @ElinaSvitolina🇺🇦

After making it to to #WIMBLEDON’s quarterfinals, our ambassador couldn’t hold back emotions. Not because of her win, but due to today’s missile attack on Ukraine💔

The audience supported her with an ovation. Thank you, Elina!

[Jason Jay Smart @officejjsmart]

⚡️⚡️⚡️ The children hospital in Kyiv 🇺🇦 was hit by Russian missiles.

The Russians are murdering sick children.

👉 No negotiations with Russia.

[Kate Levchuk @KateGoesTech]

Each of these surgeons has more balls than all of NATO politicians combined

[Serhii Sternenko @sternenko]

Terrorism always has the same face.

[Joni Askola @joni_askola]

1/17 Time to look in the mirror: russia is truly grappling with an issue of nazism, and assigning blame to Ukraine will not resolve it.

[Yurii Kostiuk 🇺🇦 @yukostiuk]

I have been selected as AWS Community Builder for the third time in a row.
It has always been a pleasure to give back to the community.
Thanks to @jasondunn and @awscloud team.
#aws #community #AWSCommunityBuilders

[Elena Solomakho @Aries_Marcy]

Чувак очень бодро объяснил про "Спасибо деду за победу" 👏
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