bea-edit/agents.md

Project Agent Guide

Project overview

This repository contains juri-merger, a German-language SvelteKit application branded as beA-Edit. Users add one or more beA ZIP archives or PDF files in the browser, inspect and reorder supported attachments, group attachments into named sub-documents (including page-level PDF splitting), and export merged PDFs. Nested ZIP archives and XJustiz metadata are handled client-side; there is no upload, server-side archive processing, database, analytics, or persistence of case data.

The application also contains German imprint and privacy-policy routes.

Technology stack

• SvelteKit 2 and Svelte 5, with runes mode forced for project source files
• TypeScript in strict mode
• Vite 8
• Tailwind CSS 4 through @tailwindcss/vite
• shadcn-svelte 1 with the nova style and CSS-variable theme tokens
• bits-ui, tailwind-variants, clsx, and tailwind-merge
• Lucide Svelte icons plus project-specific SVG icon components
• fflate for ZIP extraction and image-export ZIP creation
• pdf-lib for PDF assembly, @cantoo/pdf-lib for encryption, and pdfjs-dist for rendering
• @sveltejs/adapter-node
• PWA/offline support through @vite-pwa/sveltekit (Workbox precache, generated web manifest)
• pnpm with a committed lockfile
• Prettier with Svelte and Tailwind plugins

Use pnpm, not npm or yarn. The production container uses Node 24 and pnpm 11.15.1.

Commands

pnpm install             # Install dependencies
pnpm dev                 # Start the development server
pnpm build               # Create the adapter-node production build
pnpm preview             # Preview the production build
pnpm check               # Run Svelte and TypeScript diagnostics
pnpm check:watch         # Run diagnostics in watch mode
pnpm test:e2e            # Run the Playwright toolbox tests in Chromium
pnpm test:pwa            # PWA offline/update tests against the production build (requires pnpm build)
pnpm lint                # Check repository formatting with Prettier
pnpm format              # Format the repository with Prettier

For code changes, run at least:

pnpm check
pnpm test:e2e
pnpm lint
pnpm build

For documentation-only changes, a targeted Prettier check is sufficient. If pre-existing warnings or formatting failures remain outside changed files, report them instead of making unrelated edits.

The Docker image can be built from the repository root. It installs with --frozen-lockfile, builds and prunes dependencies, then runs node build/index.js as a non-root user on port 3000.

Repository structure

src/
├── app.html                              # German HTML shell
├── app.d.ts                              # SvelteKit application declarations
├── lib/
│   ├── actions/ripple.ts                 # Button ripple Svelte action
│   ├── assets/                           # Favicon and local Nunito fonts
│   ├── components/
│   │   ├── AttachmentPreview.svelte      # Browser-rendered PDF/image thumbnails
│   │   ├── AttachmentMenu.svelte         # Per-attachment dropdown menu (move, split, remove)
│   │   ├── BatchFileList.svelte          # Shared batch rows: status chips, downloads, retry
│   │   ├── BeaArchiveProcessing.svelte
│   │   ├── BeaWorkspaceControls.svelte   # beA workspace toolbar, settings popover, dialogs
│   │   ├── ProcessedZipArchiveEditor.svelte
│   │   ├── PdfSplitDialog.svelte         # Page-level PDF splitting into Teildokumente
│   │   ├── SubDocumentEditor.svelte
│   │   ├── FileDropzone.svelte           # Shared PDF/image/ZIP file picker and drop target
│   │   ├── ZipFilePicker.svelte          # Compact ZIP picker button with hidden resettable input
│   │   ├── PdfPageGrid.svelte            # Accessible PDF thumbnail selection grid
│   │   ├── PwaUpdatePrompt.svelte        # Service-worker registration and update/offline toast
│   │   ├── RasterizationWarning.svelte
│   │   ├── ZipDropzone.svelte            # beA-specific wrapper around FileDropzone
│   │   ├── icons/                        # Project-specific SVG components
│   │   └── ui/                           # Local shadcn-svelte component source
│   ├── services/
│   │   ├── xml-reading.service.ts        # Namespace-tolerant XJustiz parsing
│   │   └── zip-inflating.service.ts      # Async fflate wrapper
│   ├── batch.ts                          # Sequential batch engine for multi-file tools
│   ├── pdf-compression.ts                # Shared compression presets and rasterize pipeline
│   ├── pdf-metadata.ts                   # PDF metadata inspection and cleaning (pdf-lib only)
│   ├── pdf-overlay.ts                    # Shared PDF overlay positions and color parsing
│   ├── pdf-processing.ts                 # Reusable PDF merge helper
│   ├── pdf-thumbnails.ts                 # Managed pdfjs thumbnail loading and cleanup
│   ├── utils.ts                          # cn() and shared component utility types
│   └── zip-processing.ts                 # Archive model, transforms, and PDF export
└── routes/
    ├── +layout.svelte                    # Shared logo header and branded footer
    ├── +layout.ts                        # `prerender = true` for all routes (PWA offline documents)
    ├── +page.svelte                      # Toolbox hub and global beA ZIP drop target
    ├── layout.css                        # Tailwind, shadcn, theme, fonts, global CSS
    ├── tools/
    │   ├── +layout.svelte                # Shared back-navigation shell
    │   ├── bea/+page.svelte              # Existing ZIP archive workflow
    │   └── {merge,separate,stamp,watermark,encrypt,decrypt,compress,convert,rotate,metadata}/
    ├── datenschutz/+page.svelte          # Privacy policy
    └── impressum/+page.svelte            # Imprint
static/                                   # Public logo, footer art, PWA icons, and robots.txt
components.json                           # shadcn-svelte registry configuration
Dockerfile                                # Node adapter production image
playwright.pwa.config.ts                  # Playwright config for `pnpm test:pwa`
plan/                                     # Design and implementation notes

Generated directories such as .svelte-kit/, build/, and node_modules/ must not be edited or committed.

PWA / offline mode

• SvelteKitPWA is configured in vite.config.ts with registerType: 'prompt': a waiting service worker never activates by itself. PwaUpdatePrompt.svelte registers the worker in the browser and shows a toast (“Neue Version verfügbar” with “Neu laden”/“Später”, plus a one-time hint when the app is ready offline). Never force a reload — an in-progress archive must survive a declined update.
• All routes are prerendered (src/routes/+layout.ts), so route documents land in the precache and offline navigation works for every page, including a direct deep link. navigateFallback: '/' covers unknown paths.
• Precache contents come from workbox.globPatterns: the plugin's client/prerendered defaults plus mjs (the pdfjs worker chunk, required for offline rendering) and the local fonts; the unused static/Nunito/** font drop is excluded via globIgnores. Precache size is ~4.5 MB.
• PWA icons in static/icons/ (192/512, maskable, apple-touch) were generated once from static/favicon.svg; regenerate them with ImageMagick/rsvg if the logo changes. The manifest link is injected client-side from virtual:pwa-info in the root layout, theme-color and the apple-touch-icon live in app.html.
• devOptions.enabled stays false: pnpm dev never registers a service worker, so development caches stay clean. Verify PWA behaviour only against a production build (pnpm build and pnpm preview, or pnpm test:pwa, which also covers the offline processing chain and the update toast).
• Simulating a deployment in tests requires restarting node build/index.js: adapter-node's static handler (sirv, non-dev mode) walks the build directory once at startup and caches the ETags, so swapped files are invisible to a running process. Browsers revalidate /sw.js via its ETag on navigation and registration.update(), so the normal container restart on deploy is sufficient.

Application flow and state

• / is the toolbox hub. A beA ZIP or PDF dropped anywhere on that route is queued in memory and forwarded to /tools/bea; the file is not uploaded or persisted.
• /tools/metadata is a single-PDF inspection tool. src/lib/pdf-metadata.ts reads document properties with pdf-lib only (no rasterization), returns a discriminated { status: 'encrypted' } result for password-protected files, and detects embedded-file markers by scanning raw bytes. Cleaning neutralizes the standard Info dictionary fields and re-saves through pdf-lib; embedded files and XMP streams are out of scope and are disclosed in the UI instead.
• tools/bea/+page.svelte owns selected files, processed archives, pending work, and the thumbnail-width preference. Thumbnail width is the only persisted UI setting and uses localStorage.
• The loaded workspace renders BeaWorkspaceControls.svelte, a top-aligned toolbar with the workspace status and two archive lifecycle actions:
  • “Neue Datei bearbeiten” (replace) opens a file picker and, after the user confirms the replacement dialog, calls replaceWithZipFiles(files) which resets the workspace and enqueues the new files against the incremented generation. Files picked for replacement stay in temporary component state until confirmation; cancelling the picker or the dialog must never mutate the current workspace.
  • “Weitere Datei hinzufügen” (append) lives in the settings popover, uses the plain append path (handleFilesSelected), and never clears current archives. Keep the two labels distinct: replace is “Neue Datei bearbeiten”, append is “Weitere Datei hinzufügen”.
• BeaWorkspaceControls.svelte owns only ephemeral UI state (popover/dialog open state and pending replacement files). The route remains the source of truth for files, jobs, archives, and the persisted thumbnail width.
• resetWorkspace() is the single teardown helper: it increments archiveGeneration and clears selected files, processed archives, and jobs. Never clear those arrays without going through it.
• Accepted file types for the workspace (beA ZIP and PDF) are centralized in src/lib/zip-selection.ts and shared by the dropzone, the start-page drop target, and both compact pickers; ZipFilePicker.svelte resets its input after every selection so the same file can be chosen again.
• Workspace files are processed concurrently. PDF files become single-attachment archives via pdfFileToArchive; ZIP files go through extractZipArchives. archiveGeneration prevents results from an old batch from reappearing after the user deletes all archives or confirms a replacement.
• ProcessedZipArchiveEditor.svelte edits one archive and emits immutable replacements through onArchiveChange; the route-level archive array remains the source of truth.
• Attachments may remain loose or belong to exactly one sub-document. Drag-and-drop supports reordering and moving attachments between lists, while sub-document headers can be reordered.
• Gruppieren (grouping mode) offers archive-wide multi-select over loose and sub-document attachments: create a new Teildokument from the selection, move the selection into an existing Teildokument, select all/none. Exiting with Fertig or Escape clears the pending selection. New Teildokumente are numbered via nextSubDocumentNumber (max existing trailing number, not list length), and the created block's name input is focused and scrolled into view.
• Each attachment card has an “⋯” menu (AttachmentMenu.svelte) as the keyboard/touch path: move into an existing or new Teildokument, move back to the loose list, split PDFs, and remove (with confirmation). It must never become the only way to perform an action that drag-and-drop also covers.
• PDF splitting: PdfSplitDialog.svelte opens per PDF attachment, renders pages through loadPdfDocument + PdfPageGrid, and assigns page sets to named groups (manual selection, “Jede Seite einzeln”, or “Alle N Seiten”). Cut is the default; “Seiten im Original behalten” switches to copy. applyPdfSplit replaces the source with the remaining pages (or removes it), inserts the new Teildokumente after the source's parent block, and the synthetic attachments get unique #seiten-… path suffixes because path is the identity for keyed lists, drag payloads, and selection.
• Per-archive export supports one flattened PDF or separate PDFs for sub-documents. Each sub-document also has its own direct download action that exports only that sub-document's attachments. Bulk export from the page always creates one flattened PDF per archive.

When changing archive transforms, preserve these invariants:

• An attachment move must not duplicate or discard data. Splitting cuts pages by default and only duplicates them when the user explicitly chooses copy mode.
• Sub-document IDs remain stable across edits and reordering.
• Single-PDF order is all sub-documents in order, each attachment in order, followed by loose attachments in order.
• Dissolving a sub-document appends its attachments to the loose list.
• Splitting inserts the new Teildokumente directly after the source's parent block (loose source: appended at the end) so the reading order is preserved.
• State helpers in zip-processing.ts should return new archive/list objects rather than mutating component-owned state.

ZIP, XML, and PDF processing

All case-file processing is intentionally local to the browser.

• extractZipArchives recursively inflates nested ZIP files.
• Ignore macOS metadata (__MACOSX, .DS_Store, and ._*) and unsupported entries.
• xjustiz_nachricht.xml is metadata, not an export attachment. Its sender, receiver, and declared document names determine the generated PDF name and preferred attachment order.
• XJustiz element matching must remain namespace tolerant. Malformed or absent metadata falls back safely instead of preventing extraction.
• Supported attachments are PDFs and the image extensions listed in zip-processing.ts. Update the extension classification and downstream preview/export behavior together when adding formats.
• PDF attachments are copied with pdf-lib. JPEG and PNG files can be embedded directly; other image formats are decoded through browser image/canvas APIs and converted to PNG first.
• Page-set copies (separate/extract tools, PDF splitting) share copyPagesToNewPdf(sourceBytes, pageIndexes) in src/lib/pdf-processing.ts so the copy semantics cannot drift apart.
• AttachmentPreview.svelte dynamically loads pdfjs-dist in onMount, copies PDF bytes before rendering, and revokes object URLs during cleanup. Preserve those memory and data-integrity safeguards.
• Empty archives/export groups should continue to fail explicitly rather than creating invalid PDFs.

Browser-only APIs used by this flow include File, DOMParser, Image, canvas, Blob, URL, localStorage, and crypto.randomUUID(). Do not invoke browser-only work during SSR or at module initialization. Keep it in event handlers, onMount, effects guarded by hydration, or functions only called in the browser.

Batch processing pattern for single-PDF tools

Tools that transform one PDF per run (compress, watermark, encrypt, …) are being retrofitted to accept multiple files. Follow the established compress retrofit when adding the pattern to another tool; see plan/batch-processing-plan.md for the full design.

• src/lib/batch.ts owns the engine: createBatchItem(file), runBatch(items, process, update, options?) and formatBytes. runBatch processes strictly sequentially (one PDF in flight for memory safety), never throws — per-item failures are caught and written to the item as a German error message — and consults the optional shouldProcess predicate so rows removed mid-run are skipped.
• src/lib/components/BatchFileList.svelte renders the rows: name, size, status chip (Wartet / Verarbeite… / Fertig ✓ / Fehler), per-row download, remove, and retry buttons with accessible names including the file name, a progress line (“Datei 3 von 7 wird verarbeitet…”), a total result-size summary, a memory warning (>20 files or any file >25 MB), and the bulk “Alle herunterladen” ZIP action (via fflate, named {toolname}_{date}.zip) shown once ≥2 results exist. Duplicate result names inside the ZIP are suffixed instead of overwriting.
• Page wiring: keep items = $state<BatchItem[]>([]), append newly dropped files (do not replace; deduplicate by name + size), pass a process(file) callback that reads the current option state so option changes mid-run affect only subsequent files, and gate the run button on pending items. Files too large to rasterize (>100 MB) are marked as error rows immediately on selection instead of blocking the batch.
• Per-tool ZIP base names: compress uses komprimiert, watermark wasserzeichen, encrypt geschuetzt, decrypt entsperrt. Choose an analogous German name per tool and cover the batch flow with Playwright tests (multi-file ZIP contents, failure continuation, retry, removal).

Svelte conventions

• Use Svelte 5 runes and current event syntax: $props(), $state, $derived, $effect, snippets, {@render ...}, and handlers such as onclick rather than legacy APIs.
• Keep component scripts typed with <script lang="ts">.
• Define a local Props type for non-trivial component props.
• Use callback props for child-to-parent updates; do not mutate prop objects in place.
• Use $lib/... aliases for application imports instead of long relative paths.
• Name reusable components in PascalCase and route files according to SvelteKit conventions.
• Preserve semantic HTML, accessible names, visible focus states, and keyboard alternatives. Do not make drag-and-drop the only way to perform a critical action.
• Clean up global listeners, object URLs, PDF loading tasks, and other browser resources.

The Vite configuration forces runes mode for project files, so do not introduce legacy Svelte component patterns.

shadcn-svelte and component conventions

components.json configures the official shadcn-svelte registry, the nova style, Lucide icons, and these aliases:

• UI components: $lib/components/ui
• General components: $lib/components
• Utilities: $lib/utils

Use existing local UI components before creating replacements. Follow the exports actually present on disk: the card is composed through import * as Card from '$lib/components/ui/card', while the current button is a default import from $lib/components/ui/button.svelte.

When adding a registry component, use the project runner, inspect every generated file, and preserve local customizations:

pnpm dlx shadcn-svelte@latest add <component>

Do not overwrite or bulk-update customized components without explicit approval. Use cn() for conditional class merging and existing variants before adding one-off component styling.

Styling conventions

Use Tailwind utilities in Svelte markup and semantic theme tokens from src/routes/layout.css.

• Prefer bg-background, text-foreground, bg-primary, text-muted-foreground, border-border, and other configured semantic utilities over raw brand colors.
• Preserve the established Nominandum visual language: pale blue-gray background, white cards, dark blue primary text, red/coral secondary actions, rounded containers, and Nunito typography.
• Use flex/grid with gap-*, responsive variants, and size-* when width and height are equal.
• Use cn() rather than constructing partial Tailwind class names. Keep complete class names visible to Tailwind's scanner.
• Prefer component variants and theme variables over overriding UI-component colors in call sites.
• Add global CSS only for imports, tokens, font faces, animations, or behavior that utilities cannot reasonably express.
• Tailwind 4 is configured through Vite and layout.css; there is no tailwind.config file.
• Maintain contrast, responsive layouts, drag-state feedback, and visible focus treatment.

Theme-level changes belong in src/routes/layout.css. Do not reintroduce the removed Skeleton theme or refer to the old nom-theme.css architecture.

Formatting

Follow the checked-in Prettier configuration:

• Tabs for indentation
• Single quotes in scripts and styles where supported
• No trailing commas
• 100-character print width
• Svelte-aware and Tailwind-aware formatting

Use pnpm exec prettier --write <changed-files> for targeted formatting. Avoid formatting unrelated files solely to clean up existing differences.

Product and content constraints

• User-facing copy is German unless a task explicitly requests another language.
• Preserve legal text in datenschutz/+page.svelte and impressum/+page.svelte unless explicitly asked to change it.
• Keep the Nominandum logo, footer artwork, and theme consistent across routes.
• ZIP selection accepts multiple files matching .zip, application/zip, or application/x-zip-compressed.
• Resetting the file input after selection is intentional so the same archive can be selected again.
• Do not add uploads, network requests, server processing, analytics, or case-data persistence without an explicit requirement and privacy review.

Change discipline

• Keep changes scoped and preserve unrelated work, including untracked files.
• Inspect existing components, archive helpers, and theme tokens before adding abstractions.
• Keep browser processing behavior and archive-order invariants covered when editing shared helpers.
• Do not hand-edit generated output or lockfile contents. Update the lockfile only through pnpm when dependency changes are required.
• Avoid dependencies when the task can be completed with Svelte, browser APIs, Tailwind, or existing packages.
• After implementation, review changed files, run relevant checks, and mention remaining warnings or limitations.