Windows-native agent & tray
Rust local agent with branded tray icon, Operator interface, local status and device management. Branded icon and Explorer restart recovery were verified on v0.77.3.
FEATURE CATALOGUE
Features & availability
Status recorded: 30 October 2026
DirectSpool connects authorized browsers and business software to local printers and peripheral devices. This catalogue distinguishes implemented software from verified tests and future plans. The current Windows agent is a pre-release QA candidate, not a commercially certified installer .
Distribution model:
The Community local agent is planned as free software. The proprietary Rust Core remains private. Open-source JavaScript/TypeScript SDKs and connectors are separately reviewed for public release. Business Cloud is a future paid service.
Current code and capabilities
Local HTTP JSON API & WebSocket
Loopback endpoints, local command transport, status, job enquiry and bidirectional transport paths. Public-internet access is not the design.
Explicit pairing & authentication
Origin approval, pairing request/claim, bearer-token commands and trusted-origin controls. Least-privilege capability enforcement is still under security review.
Receipt printing: ESC/POS
Raw receipt command support and a prior physical 58 mm thermal test on a ZY302 printer. Not a blanket certification of printers, widths, cutter support or drivers.
Windows RAW & TCP printing
Registered Windows spooler queues and configured direct TCP/IP raw printer endpoints. Printer-specific network and physical acceptance remains incomplete.
ZPL / EPL label payloads
Submit printer-native label language payloads to configured devices. This does not include a certified template designer or universal label-printer compatibility.
Local-first operation
Core local printing is designed to work without continuous internet or a paid Business Cloud subscription.
Printer health and job inspection
Read-only printer health, job listing and status APIs. OS spool acceptance does not prove that paper was printed.
Serial scales and peripheral operations
Authorized serial reading, scale-reading foundations, cash-drawer output and additional device integration paths. Hardware-specific certification remains pending.
JavaScript / TypeScript SDK
Candidate v0.77.3-rc.1 SDK, browser pairing APIs, command and device helpers. Linux and Windows CI passed; repository is private and npm release is not authorized.
Browser extension foundations
Chromium and Firefox integration components exist. Store publication and full security/compatibility review are separate milestones.
Safe job-outcome semantics
Avoid automatically replaying uncertain jobs. A submitted job is not declared physically completed without reliable device-specific evidence.
What has actually passed?
Selected physical printing, Rust/SDK QA, Windows Sandbox installation/upgrade, Chrome/Edge HTTPS pairing and Edge blocked-permission behavior have evidence. See the verified test results for exact scope, dates, and limitations.
Upcoming modules and platforms
Advanced printer discovery
USB/HID, LAN/mDNS, IPP/IPPS, profiles, stable printer health events and network printer security checks.
Rendering and resilient queues
PDF, HTML, Office and barcode/label packs; durable job queues, idempotency, print release, policies and safe reconnect handling.
Business Cloud
Tenant-isolated organizations, sites, agents, fleet dashboards, remote routing, subscriptions, managed updates and audit trails.
More operating systems
Native macOS and Linux agents, ARM/gateway deployments, Android printer-agent exploration and Android/iOS fleet-management apps; iOS client work remains future scope.
A source directory, API operation or demonstration is not proof of compatibility with all devices or operating systems. Availability, pricing and commercial terms will be announced only after their respective release gates.