chapter-tgz

Glyd is a Rust lossless-compression library and command-line tool with a C ABI, streaming interfaces, and Python and Go bindings. It targets object storage, data lakes, logs, telemetry, backups, versioned exports, RPC payloads, and caches as an alternative to LZ4, Snappy, and zstd. Its record mode detects delimited records, SQL dumps, JSON lines, and varying-shape logs, converts fields or template variables into typed streams, and compresses them in parallel. Base mode compresses a new version against an older version by using regions of the old data as history. The format uses independently decodable blocks and parallel paths; higher levels use separated token, offset, length, and literal streams with SIMD-oriented decoding, while long-distance matching can find repeated content up to 128 MB back. The repository also provides shape dictionaries for small objects, packs for many small objects, container and JPEG handling at selected levels, and a cold context-mixing level for infrequently read data. The separate glyd-store crate and CLI select similar stored objects as delta bases using fingerprints, cap delta chains, and support local directories and S3-compatible backends. The codec, CLI, C ABI, and bindings use the BSD 3-Clause License or GPL-2.0; glyd-store uses the Business Source License 1.1, with commercial production use requiring a license and conversion to Apache-2.0 four years after each release.

ritridata is a Rust command-line tool for read-only inspection of disk images and synthetic image generation. It reads MBR and GPT partition metadata, checks GPT header and entry-array CRCs, reports bounds and overlapping partitions, reads sectors and byte ranges, produces hex dumps and hashes, and exposes public file-signature definitions through ID lookup. Its generator creates blank, MBR, and GPT test images, including synthetic invalid-CRC and truncated fixtures, with JSON output for structured commands. The tool operates offline and accepts regular .img, .raw, and .dd files; input images are opened read-only, while generated files use an exclusive new-file operation. It does not scan or carve files, parse filesystems, recover deleted data, repair images, or substitute GPT backup entries for an invalid primary. The repository is licensed under AGPL-3.0-only.

ttfx is a dependency-free Rust command-line tool that applies terminal text animations to piped input and distributes them as a single static binary. It is a parity-exact port of the Python TerminalTextEffects project, preserving its effects, animation engine, command-line interface, cursor behavior, options, and implementation quirks rather than introducing new artwork. Users select effects such as decrypt, beams, matrix, or a random effect with commands such as `cat banner.txt | ttfx beams`; the project documents 37 effects and byte-identical output to the Python original for the same input and seed. The port and original are MIT licensed.

Tailcat is an open-source Go CLI and library from Tailscale that provides Netcat-style connections over Tailscale's encrypted data plane without using the Tailscale control plane or requiring a Tailscale account. A server generates a connection token containing WireGuard and relay metadata; a client uses the token to establish an end-to-end encrypted tunnel, initially through a DERP relay, while magicsock attempts NAT traversal and a direct peer-to-peer UDP connection. Its userspace networking stack does not alter routing tables, DNS settings, or require root access. The CLI can pipe standard input and output between machines, forward local TCP ports, provide an unauthenticated SSH server, run commands through a SOCKS5 proxy, act as an exit node, ping and inspect connection tokens, and publish tokens through DNS TXT records. The Go library exposes server and client APIs for dialing TCP ports through the tunnel. Tailcat can use Tailscale's public rate-limited DERP relays or user-operated relays, and an experimental WebAssembly browser demo supports file and text transfer. The project states that its CLI, API, and wire format have no stability guarantees.

Tailtab is a browser extension and native host that gives each browser profile its own Tailscale node, allowing profiles to use different tailnets and exit nodes simultaneously. The extension communicates with a Go host through native messaging; the host embeds Tailscale's tsnet, becomes a tailnet node, and exposes an authenticated HTTP/SOCKS5 loopback proxy. Chromium uses a PAC script and Firefox applies equivalent per-request proxy rules, so tailnet traffic—including MagicDNS, tailnet domains, and routed private ranges—uses Tailtab while ordinary browsing bypasses it. Each profile has separate node keys and state, and the proxy uses a per-process credential to prevent other programs from borrowing the profile's identity. Tailtab also supports multiple Tailscale accounts, custom Headscale-compatible coordination servers, per-profile exit nodes, and tailnet machine search. It is distributed from the GitHub repository with release binaries and browser extension packages for Chromium-based browsers and Firefox/Zen; installation is currently manual, and the project describes itself as experimental. It is licensed under BSD-3-Clause.