Extensions for Sevak

Add a focused tool without rebuilding the application. This productivity pack uses Sevak's script-plugin protocol; the Gallery installs each tool individually. For native extensions and the unified manager, see Extensions. The first productivity pack includes four tools and an optional theme.

Browse and install

1. Open Settings → Gallery → Load gallery.
2. Search by name, keyword or description. Filter by Extensions, Workflows, or installation status.
3. Read the requirements, then choose Install. Sevak verifies the package checksum and adds it to your plugins folder.
4. Allow the plugin's displayed command when prompted. Install Node.js 22+ on your command path first; these extensions need it to run.
5. Open the launcher and type the keyword followed by a space.

Released builds use the catalog pinned to their release, so new packages appear with the next release. To try packages from this checkout now, copy a folder from examples/plugins to your plugins folder, then choose Reload index. Keep the entire folder together. No npm install is needed inside an extension: these tools use only Node's standard library.

The productivity pack

Extension	Try	What it does
Color tools	colors #f5b52c	Copies HEX, RGB or HSL
Color tools	colors #fff on #111	Shows text contrast ratings or copies the report
Pomodoro	pomo start 25	Starts a focus timer when you press Enter
Pomodoro	pomo status	Checks remaining time and completed focus sessions
Translate in browser	tr fr hello world	Opens Google Translate with French as the target
Tauri docs	tauri updater	Opens the matching official Tauri 2 guide
Catppuccin Mocha	Theme gallery	Applies a dark palette with mauve accents

Color tools

Use opaque #RGB, #RRGGBB, rgb(245, 181, 44) or hsl(41, 91%, 57%). Enter copies a conversion. Add on or vs and another color to see a WCAG 2.x text contrast report. Decisions use the unrounded ratio, with separate normal/large-text AA and AAA ratings.

The extension works offline and writes no files. It converts typed colors; it does not sample screen pixels, handle alpha or check overall accessibility. How contrast is calculated.

Pomodoro

Type pomo start 25 for focus, pomo break 5 for a break, pomo pause, pomo resume, or pomo reset. Enter confirms the command. Durations are whole minutes from 1 to 180. Starting a timer replaces any current one.

The deadline and completed count are saved in plugins/pomodoro/timer.json under Sevak's data directory. Time continues to elapse across plugin/app restarts. A finished focus session is counted once when you next query it. Breaks start manually.

Reopen or retype pomo status to refresh; the host may cache results for two seconds. This version has no live countdown, background alarm or OS notification. It makes no network requests. A corrupt saved file produces a help message; back up or rename that file to reset without losing the original.

Translate in browser

Use tr <target language> <text>, such as tr en bonjour, tr hi good morning or tr ar hello. Type tr to see supported language codes. Source language detection happens in Google Translate. Maximum input is 5,000 Unicode characters.

This is a browser shortcut: translations appear on Google's website, not in the launcher. Typing makes no request; pressing Enter sends the text to Google through your browser. The extension saves no text or translation history.

Tauri docs

Search a curated list of official Tauri 2 guide titles and keyword tags. Try tauri rust, tauri global shortcut or tauri clipboard. All query words must match a guide. The index search is offline; Enter loads the official page in your browser. It is not full-text search or an offline documentation mirror.

Catppuccin Mocha

Go to Settings → Appearance → Theme editor → Browse online themes. Install Catppuccin Mocha, then select/apply it in the editor. From an unpublished checkout, import gallery/themes/Catppuccin-Mocha.toml instead.

The palette is from Catppuccin, under its MIT license; the Sevak adaptation and license are included in this repo. It needs no script runtime or plugin approval.

The developer and everyday utilities pack

Ten more offline script plugins, each a single Python 3 file using only the standard library. They never touch the network, run no program and write no file. Install Python 3.8+ on your command path first; every keyword below needs a space after it, and each shows example rows when you type it alone.

Extension	Try	What it does
JWT decoder	pyjwt eyJhbGci...	Header, payload and exp/iat/nbf in plain words. Decodes only: the signature is not verified
Number base converter	base 0xff, base ff 16	Binary, octal, decimal, hex, base 32 and base 36
Cron explainer	pycron 30 9 * * mon-fri	Explains the expression and lists the next five runs
Regex tester	rx (\d+)-(\d+) :: call 555-1234	Every match and capture group (Python re syntax)
Unicode lookup	uni U+1F600, uni right arrow	Name, UTF-8 bytes, HTML entity and escapes; searches names
HTTP status codes	http 404, http redirect	What a status code or a group of codes means
Port reference	port 5432, port ssh	What a TCP/UDP port is used for; common dev-server ports
chmod calculator	chmod 755, chmod rwxr-xr-x	Octal and symbolic permissions, setuid/setgid/sticky
Date calculator	days 2026-12-25, days +90	Days until or between dates, and date plus or minus days
Slugify and text stats	slug Hello World!	URL slug, safe file name, word and reading-time counts

Notes on behavior: the cron explainer uses this computer's clock and cron's rule that day-of-month and weekday match when either does; the regex tester caps the text at 2,000 characters, and Sevak stops its process if a pattern exceeds the plugin timeout; the date calculator counts weekdays without knowing any holidays. Enter copies the row you picked.

The Python JWT and cron tools use pyjwt and pycron so they can be installed alongside the native jwt and cron tools without sharing a keyword.

Research basis

These were chosen by looking at what people install and recommend in other launchers' stores and picking developer and everyday utilities that Sevak does not already have (it already covers apps, calculator, units and currency, clipboard, snippets, emoji, windows, passwords, ids, colors, hashes, lorem ipsum, case conversion and the like), that work fully offline and that fit the gallery rules:

• Raycast Store: JWT Decoder, Regex Tester, Cron Description, Unicode Symbols Search and the many Base64, JSON and number-base developer utilities are among its popular developer extensions.
• PowerToys Run third-party plugins: UnicodeInput and PowerHexInspector (character lookup, number bases) are on Microsoft's list of community plugins.
• Flow Launcher plugin store: its popular plugins include Colors, a unit-aware calculator and currency conversion, which shows demand for small offline converters; Sevak already has those, so this pack adds the developer references around them.
• Alfred Gallery and workflows: has community equivalents of the same categories (encoders, lookups, date math); not individually checked.

Time-zone conversion was considered and left out: Python's zoneinfo needs a time-zone database that Windows does not ship, so it would not be cross-platform without a bundled data file. Two modules were added to the allow list in crates/sevak-plugins/tests/gallery_content.rs for this pack: base64 (decoding a JWT's segments) and unicodedata (character names, accent folding). Both are pure in-memory data transforms.

Native tools (compiled Rust)

Three tools are native extensions: compiled programs, so they need no Node.js, Python or other runtime. They appear in Settings → Extensions (and ext in the launcher), and Sevak asks before the first run, showing the program's SHA-256. All three work offline and declare no permissions; their source is in examples/native. A native extension is not sandboxed (see the security model); reading the short source is the way to check these.

Extension	Try	What it does
JWT decoder	jwt eyJhbGciOi...	Shows whether a token is expired, its algorithm, header, claims (times as dates) and signature. Enter copies a value. The signature is not verified
Cron explainer	cron */15 9-17 * * 1-5	Says what a cron expression means and lists the next five run times (UTC, or add an offset such as +05:30)
Regex tester	regex (\d+)-(\d+) => call 555-1234	Lists every match with its position and capture groups. Rust regex syntax: no lookaround or backreferences, but no pattern can hang

Each package is built per platform by CI. A computer with no build for its platform sees "no build for your platform". The online catalog of a released Sevak lists what was committed at that release's tag; the current list is in the gallery README.

Tools already built into Sevak

Several common extension categories are already available:

Need	Existing feature
Emoji and symbols	Emoji picker
Prevent sleep	awake 45 in automation tasks
Quit/kill a process	Automation tasks
Contacts	Contacts integration
Browser bookmarks	Bookmarks
Appearance customization	Themes and the editor

These are original Sevak-compatible extensions inspired by categories in the Asyar catalog. Asyar's extension packages and SDK are not directly compatible. Steam indexing, paired live browser tabs, Home Assistant control, speed tests and AI-agent integrations are not part of this pack.

Disable or develop an extension

Switch it off under Settings → Plugins. IDs for this pack are script:color-tools, script:pomodoro, script:translate and script:tauri-docs (and script:jwt, script:cron and script:regex for the native tools). The script family disables all script plugins. Removing the plugin folder and reloading uninstalls it; saved Pomodoro state stays in the data directory.

Read Writing plugins to create another tool. Each package contains a manifest, source and README. Run npm run test:extensions for behavior tests and cargo test -p sevak-plugins gallery to verify package checksums and contents. See the gallery publishing guide before updating a package.