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timfewi (Tim) · GitHub

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timfewi/README.md

AI & systems engineer in Vienna.
I build autonomous software with clear boundaries, inspectable behavior, and reproducible infrastructure.

Website  ·  Projects  ·  Contact

Flagship

Tentaflake

Declarative infrastructure for self-hosted AI agents.

Tentaflake turns NixOS hosts into constrained agent fleets. Runtimes, storage, network access, secrets, observability, and lifecycle are declared as infrastructure instead of being assembled by hand.

Autonomy should increase capability, not implicit authority.

NixOS   Rust   isolated runtimes   brokered egress   audit trails

Repository · Documentation · Website

Selected systems

Project Purpose Core
Igris Guardian Capability-bounded prompt-injection firewall for agent systems. Rust · TypeScript · NixOS
Memorycreep Hardened NixOS workstation for policy-bound AI pentesting and isolated malware analysis. NixOS · Python · security
Commitell Turns a dirty Git worktree into one AI-written, DCO-signed commit. Go · Git · local tooling
lazy-allrounder Cross-platform voice AI for dictation, reading, and speech workflows. Rust · egui · OpenRouter

What connects the work

I work where agent behavior meets the operating system: capability boundaries, reproducible deployment, retrieval, security tooling, and focused products that remain useful without a platform around them.

declarative over implicit · capabilities over ambient authority · evidence over claims

Open to

Conversations about secure agent infrastructure, unusual systems problems, open-source collaboration, and technically ambitious products.

hello@timwitter.com  ·  Vienna, Austria

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  1. tentaflake tentaflake Public

    Declaratively deploy & manage multiple isolated AI agents on a single NixOS machine — each with its own secrets, skills, and personality.

    Nix 30 2

  2. memorycreep memorycreep Public

    Hardened NixOS cybersecurity workstation with policy-bound AI pentesting and isolated malware analysis

    Python

  3. igris-guardian igris-guardian Public

    Igris Guardian — a capability-bounded prompt-injection firewall (verdict-only, self-protecting, universally deployable)

    Rust 4

  4. grepquest grepquest Public

    Local-first terminal roguelite for learning game GNU grep on SUI move

    Go

  5. commitell commitell Public

    Turns every dirty change in a Git repository into one AI-written, DCO-signed commit

    Go 1

  6. whisper-nix whisper-nix Public

    Fast voice-to-text dictation for NixOS using Groq's free Whisper API — Wayland-native, PipeWire, no subscription needed

    Shell 1

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