Wyn Sample Apps

Real-world programs written in Wyn. Every app compiles and runs.

Categories

🛠 cli-tools/ (8 apps)

App	Description
loc	Count lines of code, with per-language comment syntax
todo-finder	Scan for TODO/FIXME markers in comments, ranked by severity
word-counter	Word frequency analysis
config-reader	Parse a sectioned config and validate it against a schema
md-toc	Generate a Markdown TOC with GitHub-compatible anchors
wyn-grep	Search files for a pattern
twux	Terminal multiplexer (interactive)
depgraph	Dependency graph from import statements: roots, and a three-colour DFS that finds cycles

🖥 sysadmin/ (10 apps)

App	Description
sysmon	Terminal monitor — CPU/memory plus processes, disks or ports (interactive)
sysinfo	One system report: host, CPU, memory, disks, processes, network — and it says so when a metric is unavailable
diskmon	Disk usage with colour-coded bars, parsing POSIX df -P
portscanner	Concurrent port scan, closed vs filtered
httpcheck	Concurrent HTTP health checker with timing
logwatch	Log file analyzer with severity highlighting
servicemon	Service health monitor (await_all, not a sleep)
envdiff	Diff the environment against a baseline, redacting secrets
dockermon	Docker container monitor, tab-split so statuses survive
gitdash	Git dashboard — branch, divergence, conflicts, commits

📊 data-processing/ (3 apps)

App	Description
api-client	HTTP + JSON + Base64 + Crypto + CSV + SQLite
csv-analyzer	Group and aggregate typed CSV columns
log-parser	Parse and report log errors

🧮 algorithms/ (2 apps)

App	Description
sorting	Quicksort, mergesort, bubblesort
fibonacci	Recursive vs iterative comparison

🌐 web/ (4 apps)

All four serve real HTTP and spawn a coroutine per request. They are kept apart because each shows a different layer, not a different look: curl localhost:8080/ returned byte-identical HTML from all of them, so the distinction is the API underneath.

App	What only this one shows
server	the full stack: routing, SQLite, and both JSON serializers (/api/info pretty, /api/info.min compact)
rest-api	clean shutdown -- Http.close_server and Db.close
template-demo	Template.render against a real templates/index.html
wyn-web-demo	the Web.* router (Web.get/post/match) instead of hand-parsing paths

📱 mobile/ (1 app)

App	Description
counter	Counter with undo — state transitions kept separate from the UI, so they are testable without a device (the SDK entry points are stubs)

🎨 gui/ (5 apps, require SDL3)

App	Description
hello_gui	Colored rectangles and text
dashboard	System monitor with widgets
pong	Classic Pong game
snake	Classic Snake game
notepad	Text editor with input widget

🖼 wyncanvas/ (1 app, requires a C toolchain)

The largest program here. A layered image editor: float32 linear premultiplied imaging core, 27 blend modes, masks, adjustment layers, PNG I/O, and undo/redo. Wyn for all logic, a thin C shim for per-pixel work.

Part	What
src/pixel.wyn	buffers, colour space, sRGB transfer
src/layer.wyn	layer stack, masks, adjustment layers
src/render.wyn	compositor, 27 blend modes
src/history.wyn	undo/redo as command records
src/cli.wyn	headless CLI
csrc/	C shim (libwynimg) for the hot pixel loops
tests/	12 files, 149 tests, incl. a golden-image test

cd wyncanvas
./csrc/build.sh                                    # build the C shim first
WYN_ROOT=/path/to/wyn /path/to/wyn/wyn test        # 12 files, 149 tests

Running

cd wyn

# CLI and sysadmin tools
./wyn run ../sample-apps/sysadmin/sysinfo/src/main.wyn
./wyn run ../sample-apps/cli-tools/loc/src/main.wyn

# Interactive TUI apps
./wyn run ../sample-apps/sysadmin/sysmon/src/main.wyn
./wyn run ../sample-apps/cli-tools/twux/src/main.wyn

# GUI apps (requires: brew install sdl3)
./wyn run ../sample-apps/gui/pong/src/main.wyn
./wyn run ../sample-apps/gui/dashboard/src/main.wyn

# Web server
./wyn run ../sample-apps/web/rest-api/src/main.wyn

python/

• math-lib/ - Math library compiled to shared library with auto-generated Python wrapper (31 tests)