## Summary Follow-up polish to the home **PDF Processor** flow visualiser (base landed in #7014). Tunes the particle animation to react to real volume and adds a Storybook playground to tune it live. ## Changes ### Particle emission — `useFlowParticles.ts`, `flowTypes.ts` - Emission rate now scales ~linearly with a source's 24h volume (**2× volume ≈ 2× dots**) instead of the flat `rate / 86400 × SPEED`, capped at **one dot / 250ms** (`MAX_EMIT_PER_SEC`) for busy sources (~≥ 800/24h). - Bounded the spread so the busiest source emits at most **5×** the quietest (`EMIT_SPREAD_CAP`) — a dominant source can't starve the others. - Wider departure jitter (`[0.4×–1.7×]` the mean, still floored at the per-source min-gap) and ~**2× faster travel** so the flow reads livelier. - Replaced the single `SPEED` constant with `EMIT_DIVISOR` / `MAX_EMIT_PER_SEC` / `EMIT_SPREAD_CAP`. Weighted round-robin outcome split is unchanged (e.g. 3 failed / 30 delivered → ~1 red dot in 11). ### Storybook Playground — `ProcessorFlow.stories.tsx`, `ProcessorFlow.tsx` - New **Playground** story with live controls: per-input rate sliders, the delivered/failed split (drives the red-dot ratio), and a Classification-active toggle. - Added an optional `dataOverride` prop (prod-inert testing seam) so the story renders a supplied flow model instead of fetching — changes apply instantly. ### Housekeeping - Condensed authored comments across the feature to ≤ 2 lines. ## Testing - `task frontend:check` green — lint, typecheck, 1353 tests. - Verified emission numerically (proportionality, 250ms ceiling, 5× spread cap) and confirmed live animation in a focused Storybook tab.
Stirling PDF - The Open-Source PDF Platform
Stirling PDF is a powerful, open-source PDF editing platform. Run it as a personal desktop app, in the browser, or deploy it on your own servers with a private API. Edit, sign, redact, convert, and automate PDFs without sending documents to external services.
Key Capabilities
- Everywhere you work - Desktop client, browser UI, and self-hosted server with a private API.
- 50+ PDF tools - Edit, merge, split, sign, redact, convert, OCR, compress, and more.
- Automation & workflows - No-code pipelines direct in UI with APIs to process millions of PDFs.
- Enterprise‑grade - SSO, auditing, and flexible on‑prem deployments.
- Developer platform - REST APIs available for nearly all tools to integrate into your existing systems.
- Global UI - Interface available in 40+ languages.
For a full feature list, see the docs: https://docs.stirlingpdf.com
Quick Start
docker run -p 8080:8080 docker.stirlingpdf.com/stirlingtools/stirling-pdf
Then open: http://localhost:8080
For full installation options (including desktop and Kubernetes), see our Documentation Guide.
Resources
Support
- Community: Discord
- Bug Reports: GitHub Issues
Contributing
We welcome contributions! Please see CONTRIBUTING.md for guidelines.
This project uses Task as a unified command runner for all build, dev, and test commands. Run task dev to get started running the editor, run task to see the most common commands, or see the Developer Guide for full details.
For adding translations, see the Translation Guide.
License
Stirling PDF is open-core. See LICENSE for details.

