Projects
Selected systems engineering, security research tooling, and earlier experimental work.
Systems Engineering
Zeppe-Lin
Source-based GNU/Linux distribution and ongoing systems engineering project derived from CRUX. The native package stack is decomposed into contract-oriented components separating execution, application, durable state, resolution, reconciliation, and platform mechanisms.
Representative current work:
- libpkgexec-linux — Linux execution backends with explicit isolation and resource contracts
- libpkgapply and libpkgapply-posix — application, recovery, and POSIX mutation mechanisms
- pkgctl — package control plane composing the native package-management boundaries
- zeppe-lin-system — product composition and bootstrap
Security Research & Tooling
Pixload
Payload injection toolkit for image formats (JPEG, PNG, GIF, BMP, WebP).
- Embeds arbitrary payloads into image structures
- Useful for testing parser behavior and detection systems
The repository has about 1,300 stars and 250 forks on GitHub (August 2026).
https://github.com/sighook/pixload
pdf2hashcat
Maintained Python utility for extracting hashcat-compatible hashes from encrypted PDF files.
- Supports PDF 1.1 through 1.7, including standard and AES encryption
- Pure Python 3 with unit tests
https://github.com/sighook/pdf2hashcat
layer234-attack-tools
Utilities for OSI layers 2—4.
- Network-level attacks and testing primitives
- Packet manipulation and protocol interaction
https://github.com/sighook/layer234-attack-tools
layer567-attack-tools
Utilities for OSI layers 5—7.
- Application-layer attack tooling
- Protocol fuzzing and interaction helpers
https://github.com/sighook/layer567-attack-tools
Writing
The Fieldbook
Applied Cybernetic Necromancy in Haunted Infrastructure.
A technical book on systems failure analysis: semantic authority, contracts and invariants, boundary failure, artifact truth, semantic drift, institutional memory, intervention, verification, and repair.
https://github.com/zeppe-lin/fieldbook
Historical Research Archive
Earlier experimental security projects are retained in their source repositories and Git history as part of the public research record. They explored controlled protocol, wireless, validation, and security-testing environments, but are not presented here as current professional tools.
The maintained and representative work above is the portfolio intended for current engineering and security roles.