Resurrecting tap-to-click, double-click, and drag gestures on an ALPS DualPoint trackstick by probing raw kernel event streams and writing a native userspace daemon.
Decoupling the observer from the observed: isolating diagnostic workloads, memory churn, and I/O latency from the runtime.
Most logging packages treat output as an afterthought—an unconstrained print() or a synchronous ANSI box wrapped around the active thread. But when you are engineering a system under real computational load with continuous calculations, high-throughput network streams, or 120Hz display budgets, an innocent string interpolation quietly steals microseconds, triggers garbage collection churn, and drops frames.
I built logd because I needed an instrument of control, not an obstacle. Inspired by the architectural maturity of Python's logging module and enterprise event routers, but rebuilt natively for Dart’s event-loop and isolate boundaries. It grew organically from an uncompromising rule: the observer must never alter the runtime determinism of the system being observed.
Formatting, ANSI layout, and file I/O offloaded to background worker isolates in ~15µs, safeguarding 8.3ms frame budgets.
Disabled subtrees short-circuit at O(1) with zero allocations. Version-based cache invalidation avoids costly tree walks on hot paths.
Isolated InternalLogger and fallback sinks prevent infinite circular error loops when disks fill or sockets throw.
logd core engine·logd_toon AI token telemetry·logd_dio HTTP & cURL·logd_sqlite WAL sink·logd_network WebSockets·logd_html/md CI dossiers Conventional in-app notification packages in Flutter force an architectural anti-pattern: they demand an active BuildContext, pollute widget trees, and bind the visual toast directly to the call site. When an event originates from a background isolate, a reactive state machine, or a network worker, finding a valid context or navigating modal overlays causes crashes, race conditions, or dropped notifications.
flutter_notification_queue (FNQ) enforces a clean architectural boundary between event generation and spatial rendering. An alert is declared as a pure data payload (AppNotification), routed through a typed channel, and triaged by a global controller. The engine handles spatial topology, gestures, priority preemption, and deck bundling entirely above the navigator stack.
Trigger notifications directly from business logic, BLoCs, isolates, or network services without referencing BuildContext.
Multi-zone positioning (topRight, bottomCenter, topLeft) with dynamic queue relocation and intent-driven gestures.
High-priority security or system alerts preempt the queue head immediately. High-frequency bursts collapse into aggregated decks.
AppNotification pure event payload→NotificationChannel theme & behavior→NotificationQueue spatial viewport→NotificationScope overlay hostClick any intent above to observe contextless queue insertion, priority preemption, and deck stacking.
Composers, engravers, and music theorists exist in an uncomfortable polarity: they either endure rigid, low-resolution static PDF templates, or wrestle with monolithic desktop notation programs whose algorithmic layouts resist granular millimeter customization. sarvmd (Sarv Manuscript Designer) was architected to bridge this chasm.
Engineered as a modular Dart monorepo, sarvmd operates on classical Gouldian engraving grammar (Behind Bars). A pure-Dart geometric layout calculator (SystemLayoutCalculator) computes staff coordinates, dynamic instrument label indentation, and bracket clearances with mathematical determinism, compiling resolution-independent vector PDF, SVG, and LaTeX directly in memory.
Pure-Dart coordinate calculator with zero UI framework dependencies. Computes millimeter coordinates, Rastral line spacing, and bracket clearances.
Emits resolution-independent vector PDF and SVG graphics directly in memory, alongside standalone LaTeX source (\pdfliteral) without LilyPond dependencies.
Rigorous optical proportions across Rastral sizes 0–8, systemic barlines, grand staff curly braces, and secondary orchestral grouping brackets.
PageConfig millimeter geometry→SystemLayoutCalculator pure AST layout→ScoreCompiler PDF / SVG / LaTeX emitter→sarvmd_ui / cli Flutter CAD interfacePlain provides a dedicated set of tools and programs designed to help musicians, learners, and composers analyze, understand, craft, and play music better. Built as an exploratory environment that bridges acoustic analysis with everyday musical practice.
Software instruments to inspect sound characteristics, harmonic structures, and compositional mechanics with clear, actionable feedback.
Interactive tools to explore music theory and acoustic principles through direct experimentation rather than rigid rote drills.
Focused creative environments to shape musical ideas, build arrangements, and experiment with harmonic and rhythmic composition.
Interactive digital instruments and practice utilities built to help musicians develop timing, touch, and expressive control.
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