ProSync

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Intelligent local backup synchronization with automated SQLite WAL database protection.

Note

Disambiguation: file-bricks/ProSync is an open-source Windows desktop and background application built with Python (PySide6) for local file/folder synchronization with automated SQLite WAL database protection. It is completely independent of enterprise database replication products (e.g., Tibero ProSync) or third-party macOS utilities.

Machine-readable index: Specification available at llms.txt. Last checked: 2026-09-18.

Quick Navigation

Features & Core Capabilities
System Architecture & Data Flow
Target Personas & Discoverability
Comparative Matrix vs. Alternatives
Dual Mermaid Diagrams
Governance & Runtime Invariants
Synchronization Modes & Semantics
SQLite WAL Database Protection
Visual Showcase & Feature Gallery
Installation & Dependencies
CLI & Headless Automation
Scheduled Backups & IANA Timezones
Portable Web/PWA Companion
ProSyncReader & ProFiler Search
Windows Store & MSIX Staging
Testing & Quality Checks
Third-Party Licenses & Transparency
Security Policy & Sibling Ecosystem

1. Features & Core Capabilities

Folder Synchronization: Flexible one-way, two-way, update, mirror, and index-only synchronization.
File Synchronization: Dedicated single-file backup connections for mission-critical assets.
Automatic Database Detection: Proactively identifies SQLite (.db, .sqlite, .sqlite3, .db3) and MS Access databases.
WAL Checkpoint Guard: Safely executes PRAGMA wal_checkpoint(TRUNCATE) before copying active SQLite databases, aborting fail-closed on lock contention (SQLITE_BUSY) to prevent corruption.
System Tray Integration: Runs unobtrusively in the background on Windows with auto-start and tray menu controls.
Scheduled Backups & Daily Triggers: Configurable interval timers or explicit IANA-timezone-aware daily local execution across DST transitions.
Batch Sync Queue: Select and launch multiple connections sequentially in one coordinated batch with granular progress feedback.
Atomic File Operations: Staged temporary writes (.tmp) prior to atomic replacement, preventing partial or corrupted targets during power loss.
Database Indexing & ProFiler Companion: Optional full-text indexing and instant search via the companion reader.
Portable Web/PWA Companion: Exports redacted prosync-profile-v1.json for offline mobile and browser inspection.
Cross-Platform Ready: Standardized 8-point platform smoke suites for Linux and macOS.
Windows Store Staged: Complete MSIX packaging, AppxManifest declarations, and tile asset sets (Policy 10.1.3 compliant).

2. System Architecture & Data Flow

ProSync separates user interaction, synchronization scheduling, database integrity validation, and storage targets into modular decoupled layers:

+---------------------------------------------------------------------------------+
|                                 USER INTERFACE                                  |
|   +------------------------------------+   +--------------------------------+   |
|   | PySide6 Desktop GUI (Main Window)  |   | System Tray Background Monitor |   |
|   +------------------------------------+   +--------------------------------+   |
|   +------------------------------------+   +--------------------------------+   |
|   | Headless CLI (--run / --all)       |   | ProSyncReader Search Companion |   |
|   +------------------------------------+   +--------------------------------+   |
+---------------------------------------------------------------------------------+
                                         |
                                         v
+---------------------------------------------------------------------------------+
|                           SCHEDULER & BATCH ENGINE                              |
|   ├── IANA Timezone Evaluator (DST Safe)   ├── Batch Sync Execution Queue       |
|   └── Configuration Manager                └── Instance Lock Coordinator        |
+---------------------------------------------------------------------------------+
                                         |
                                         v
+---------------------------------------------------------------------------------+
|                        SYNC & INTEGRITY ENGINE (CORE)                           |
|   ├── SQLite WAL Checkpoint Guard (PRAGMA wal_checkpoint(TRUNCATE))             |
|   ├── Lock Contention Sentinel (SQLITE_BUSY Fail-Closed Abort)                  |
|   ├── Atomic Staging & Temporary File Copier (.tmp Safe Replace)                |
|   └── Mode Logic: mirror | update | two_way | one_way | index_only              |
+---------------------------------------------------------------------------------+
                                         |
                                         v
+---------------------------------------------------------------------------------+
|                              STORAGE DESTINATIONS                               |
|   ├── Local Drives (NTFS, exFAT, APFS, Ext4)                                    |
|   ├── Network Attached Storage (NAS / SMB / CIFS UNC paths)                     |
|   └── SFTP Remote Endpoints (Hardened Paramiko with Host Key TOFU)              |
+---------------------------------------------------------------------------------+

3. Target Personas & Discoverability

Target Personas

[PERSONA-01] Desktop Power Users & Windows Sysadmins:
- Context: Automating regular backups of vital working directories, NAS shares, and external NVMe/USB drives.
- Pain Point: Generic sync utilities either lack background tray operation, lack resilient scheduling, or corrupt open SQLite databases during live copies.
- How ProSync Solves It: Unobtrusive system-tray automation, IANA-timezone-aware daily triggers, batch queues, and atomic folder synchronization with fail-closed safety.
[PERSONA-02] SQLite & Database Application Developers:
- Context: Development and production desktop environments utilizing SQLite in WAL (Write-Ahead Logging) mode.
- Pain Point: Standard copy tools copy active database files while WAL transactions are uncommitted, producing inconsistent, corrupt, or unusable backup copies.
- How ProSync Solves It: Automated pre-sync SQLite WAL checkpointing (PRAGMA wal_checkpoint(TRUNCATE)), defensive lock contention detection (fail-closed on SQLITE_BUSY), and automated WAL auxiliary file exclusion (.db-wal, .db-shm).
[PERSONA-03] Privacy & Compliance Officers / DSGVO & Enterprise Auditors:
- Context: Regulated industries, legal/medical records, and sensitive local file archives requiring strict confidentiality.
- Pain Point: Cloud storage clients and commercial SaaS synchronization tools continuously exfiltrate telemetry, analytics, and metadata.
- How ProSync Solves It: Uncompromising 100% Local-First & Zero-Egress architecture; zero external telemetry sockets; fully unprivileged user-mode execution (RunAsInvoker).
[PERSONA-04] Automation Engineers & Multi-Agent Framework Architects:
- Context: Headless script execution, CI validation pipelines, batch scripts, and LLM-assisted toolchains.
- Pain Point: Inflexible GUI-only tools that cannot be scripted without window managers or user clicks.
- How ProSync Solves It: Full-featured headless CLI (--list, --run <id|name>, --all, --quiet), redacted portable profile export format (prosync-profile-v1.json), and comprehensive automated contract test suites.

High-Intent Search Queries

"python desktop backup synchronization tool"
"pyside6 file sync folder backup windows tray"
"sqlite wal database safe backup python"
"local-first file synchronization zero egress"
"offline two-way folder sync python"
"sqlite wal checkpoint backup automation"
"scheduled folder backup iana timezone python"
"sftp atomic upload backup desktop app"
"windows store msix backup sync utility"
"open source backup sync tool mit license"

4. Comparative Matrix vs. Alternatives

Technical Dimension / Invariant	ProSync (`file-bricks`)	FreeFileSync	Robocopy / Rsync	Syncthing	Commercial Cloud SaaS Sync
INV-LOCAL-01 Local-First & Zero Egress	100% Local & Offline	100% Local	100% Local	P2P Network Protocol	Cloud Relay / Telemetry
INV-RUNAS-02 RunAsInvoker User Mode	Strictly Unprivileged	Native Installer	OS Built-in	User / Daemon	System Service / Elevation
INV-WAL-03 SQLite WAL Checkpoint Guard	Automated `PRAGMA wal_checkpoint`	None (Raw Copy)	None (Raw Copy)	None (File Watcher)	None (Locked File Error)
INV-INTEG-04 Atomic Staging & Replacement	Staged `.tmp` Safe Replace	Direct Stream	Direct Stream	Temp Staging	Chunk Upload Staging
INV-SCHED-05 DST-Aware IANA Scheduling	Built-in IANA Timezone Engine	Windows Task Scheduler	Task Scheduler / Cron	Continuous Watcher	Cloud Schedule / Poll
INV-PWA-06 Redacted Offline Companion	Export `prosync-profile-v1.json`	None	None	Web GUI (Localhost)	Web Dashboard (Online)
INV-PLAT-07 Cross-Platform Smoke Parity	Windows, Linux & macOS Matrix	Windows, macOS, Linux	OS-specific	Go Cross-Platform	Platform-specific Apps
INV-STORE-08 Windows Store / MSIX Staging	AppxManifest & Policy 10.1.3	Standalone Setup	None	Chocolatey / Scoop	Windows Store App
INV-DOCS-09 1:1 Bilingual Docs & LLM Index	18-Point EN/DE + `llms.txt`	English Docs	Man Pages / Docs	English Docs	Online Help Center
INV-SLA-10 Open Source Governance & SLA	MIT License, 48h Response SLA	GPL v3	OS Proprietary / GPL	MPL 2.0	Proprietary Commercial

5. Dual Mermaid Diagrams

System Architecture Topology (`flowchart TD`)

flowchart TD
    subgraph Layer1 ["Layer 1: User Interface & Entry Points"]
        UI_GUI["PySide6 Desktop Window<br/>(Main Workspace & Connection Tree)"]
        UI_TRAY["Windows System Tray Launcher<br/>(Background Minimize & Status Indication)"]
        UI_CLI["Headless CLI Engine<br/>(--run, --list, --all, --quiet)"]
    end

    subgraph Layer2 ["Layer 2: Scheduling & Execution Orchestration"]
        SCHED["IANA Timezone Daily Scheduler<br/>(DST-Resilient Wall Time Evaluation)"]
        QUEUE["Batch Execution Queue<br/>(Sequential Multi-Connection Dispatcher)"]
        CONF["Configuration Store<br/>(ProSync_config.json with Runtime Lock)"]
    end

    subgraph Layer3 ["Layer 3: SQLite WAL Checkpoint & Integrity Engine"]
        WAL_GUARD["SQLite WAL Checkpoint Guard<br/>(PRAGMA wal_checkpoint(TRUNCATE))"]
        ATOMIC_COPY["Atomic File Transfer Engine<br/>(Staged .tmp Write with Safe Replacement)"]
        LOCK_CHECK["Lock Contention Sentinel<br/>(Fail-Closed Abort on SQLITE_BUSY)"]
    end

    subgraph Layer4 ["Layer 4: Storage Destinations & Adapters"]
        DEST_LOCAL["Local & Removable Disks<br/>(NTFS / exFAT / ReFS / Ext4 / APFS)"]
        DEST_NAS["Network Shares & UNC Paths<br/>(SMB / CIFS / NFS Shares)"]
        DEST_SFTP["Hardened SFTP Target<br/>(paramiko SSHv2 with Host Key TOFU)"]
    end

    subgraph Layer5 ["Layer 5: Offline Companion & Indexing"]
        EXP_PWA["Profile Redactor & JSON Exporter<br/>(prosync-profile-v1.json Without Secrets)"]
        APP_PWA["Offline PWA Web Companion<br/>(Static HTML5 / Web Worker / LocalStorage)"]
        SEARCH_PRO["ProSyncReader & ProFiler Hub<br/>(FTS5 SQLite Indexing & Document Preview)"]
    end

    UI_GUI --> QUEUE
    UI_TRAY --> SCHED
    UI_CLI --> QUEUE
    SCHED --> QUEUE
    CONF -.-> QUEUE

    QUEUE --> WAL_GUARD
    WAL_GUARD --> ATOMIC_COPY
    LOCK_CHECK -.->|"Guard Interrupt"| WAL_GUARD

    ATOMIC_COPY --> DEST_LOCAL
    ATOMIC_COPY --> DEST_NAS
    ATOMIC_COPY --> DEST_SFTP

    UI_GUI -.->|"Redacted Export"| EXP_PWA
    EXP_PWA --> APP_PWA
    DEST_LOCAL -.-> SEARCH_PRO

End-to-End Backup & WAL Checkpoint Lifecycle (`sequenceDiagram`)

sequenceDiagram
    autonumber
    participant U as User / Scheduler / CLI
    participant Q as Batch Queue Dispatcher
    participant W as Sync Worker Engine
    participant G as SQLite WAL Checkpoint Guard
    participant D as Target Storage (Disk / NAS / SFTP)
    participant E as Redacted Profile Exporter

    U->>Q: Trigger Synchronization (Manual / Schedule / CLI)
    Q->>W: Dispatch Active Connection Task
    alt SQLite Database Connection (.sqlite, .db, .sqlite3)
        W->>G: Execute PRAGMA wal_checkpoint(TRUNCATE)
        alt Checkpoint Succeeded (status = 0)
            G-->>W: Checkpoint Confirmed (WAL Flushed to Main DB)
            W->>D: Stream Main Database File (Atomic .tmp Staging)
            D-->>W: Atomic Rename & Transfer Complete
            W-->>Q: Task Succeeded (Status: OK)
        else Database Locked / Busy (SQLITE_BUSY)
            G-->>W: Checkpoint Contention Detected
            W-->>Q: Fail-Closed Abort (Prevent Corrupted Inconsistent Copy)
            Q-->>U: Alert: Backup Skipped Due to Active Lock
        end
    else Standard File / Directory Connection
        W->>D: Execute Sync Algorithm (mirror / update / two_way / one_way)
        D-->>W: Transfer Summary (copied, updated, deleted, errors)
        W-->>Q: Task Completed
    end
    opt Redacted PWA Profile Export
        U->>E: Request Profile Export (prosync-profile-v1.json)
        E-->>U: Generate Sanitized Profile (No Private Paths, No Secrets)
    end

6. Governance & Runtime Invariants

ProSync strictly enforces ten foundational governance and runtime invariants:

Invariant	Title	Enforcement & Description
`INV-LOCAL-01`	Local-First & Zero Egress	Pure local runtime. Zero network sockets opened to telemetry, tracking, or analytics endpoints. Verified in `tests/test_security_license_contract.py`.
`INV-RUNAS-02`	Unprivileged RunAsInvoker	Runs purely in unprivileged user space. Never prompts for UAC elevation or root credentials. Documented in `SECURITY.md` and `pyproject.toml`.
`INV-WAL-03`	SQLite WAL Crash Safety	Automated `PRAGMA wal_checkpoint(TRUNCATE)` prior to copying active SQLite databases; aborts fail-closed on lock contention (`SQLITE_BUSY`).
`INV-INTEG-04`	Atomic File Copy Staging	File writes stage to `.tmp` files before atomic replacement, guaranteeing target files are never left in a corrupted state.
`INV-SCHED-05`	DST-Aware Daily Scheduling	Built-in IANA timezone engine calculates exact wall time, eliminating drift and catch-up storms during daylight saving time shifts.
`INV-PWA-06`	Redacted Companion Export	Exported `prosync-profile-v1.json` strips absolute file paths, private server endpoints, passwords, and tokens for safe offline companion viewing.
`INV-PLAT-07`	Cross-Platform Smoke Parity	8-point smoke test suites for Linux and macOS verify system opener commands, offscreen UI lifecycles, and POSIX path safety.
`INV-STORE-08`	Windows Store & MSIX Staging	Verified Desktop Bridge AppxManifest (`Geiger.ProSync`), Policy 10.1.3 compliant search keywords, and full tile icon suites.
`INV-DOCS-09`	1:1 Bilingual Documentation	Exact reciprocal quick navigation parity across English (`README.md`) and German (`README_de.md`), synchronized with `llms.txt`.
`INV-SLA-10`	Open Source Governance & SLA	Permissive MIT License, public issue triage, and committed 48-hour response / 5-day triage security SLA in `SECURITY.md`.

7. Synchronization Modes & Semantics

ProSync provides five deterministic synchronization modes to suit various backup and archival workflows:

Mode	Semantic Behavior	Primary Use Case
`mirror`	Target is maintained as an exact replica of source (deleting orphaned target files)	Full system & repository backups
`update`	Transfers only newer and missing files from source to target (no target deletions)	Incremental day-to-day backups
`two_way`	Bidirectional synchronization resolving conflicts by newest timestamp	Active sync between laptop and workstation
`one_way`	Source files copied to target without ever deleting files from target	Safe non-destructive archival
`index_only`	Indexes metadata and file structure without moving payload bytes	Cataloging & ProFiler search preparation

8. SQLite WAL Database Protection

ProSync proactively detects active SQLite database files and enforces crash-consistent protection mechanisms:

Supported Database Extensions

SQLite: .sqlite, .sqlite3, .db, .db3
MS Access: .mdb, .accdb

Protection Rules

Automatic Exclusion in Folder Sync: When syncing folders containing live databases, WAL auxiliary files (.db-wal, .db-shm, .db-journal) are automatically excluded from generic file copying to prevent inconsistent target states.
Dedicated File Connections: For live databases, users configure a dedicated File Connection with WAL Checkpoint enabled.
Automated Checkpoint: Before copying, ProSync issues PRAGMA wal_checkpoint(TRUNCATE):
- Success (0): The WAL journal is completely integrated into the main database file, which is then copied atomically.
- Contention / Busy: If another process holds an active write lock, ProSync aborts the copy operation immediately, logging SQLITE_BUSY to prevent creating a corrupted partial snapshot.

9. Visual Showcase & Feature Gallery

Main Overview & Connection Manager	SQLite WAL Database Safety	Portable Profile & PWA Companion

Multi-task connection manager with scheduled intervals and batch queue.	Automated SQLite WAL detection and pre-copy checkpoint validation.	Redacted profile export for offline inspection and mobile PWA reader.

10. Installation & Dependencies

ProSync supports Python 3.10, 3.11, and 3.12 (>=3.10).

pip install -r requirements.txt

Core Runtime Dependencies

PySide6 >= 6.5.0 (GUI & system tray integration)
paramiko >= 3.4.0 (Hardened SFTP network transport)
tzdata >= 2025.2 (IANA timezone database for Windows scheduling)
pypdf >= 4.0.0 (Pure-Python document preview in ProSyncReader)
(Optional) python-docx (Word document search preview)

11. CLI & Headless Automation

ProSync includes a complete headless command-line interface for scheduled tasks and headless servers:

# List all configured connections and their status
python ProSyncStart_V3.1.py --list

# Execute a specific connection by ID or exact name
python ProSyncStart_V3.1.py --run "Daily Project Mirror"

# Execute all enabled connections sequentially
python ProSyncStart_V3.1.py --all

# Run quietly in automated environments
python ProSyncStart_V3.1.py --all --quiet --config path/to/config.json

12. Scheduled Backups & IANA Timezones

ProSync features a robust scheduling engine with dual trigger modes:

Periodic Interval: Runs every N minutes or hours while ProSync resides in the system tray.
Daily Local Wall-Time: Triggers at an exact local time (e.g., 18:00). ProSync utilizes Python's zoneinfo and tzdata to handle daylight saving time (DST) transitions cleanly without missed backups or duplicate execution cascades.

13. Portable Web/PWA Companion

The desktop client exports a sanitized configuration file (prosync-profile-v1.json) via ⇄ Profil austauschen. The companion reader in web_companion/ provides offline inspection:

Completely offline: static HTML5, CSS, and Service Worker.
Zero secrets: local filesystem paths and credentials are automatically redacted.
Accessible on mobile devices or local tablets via local HTTP preview:

cd web_companion
python -m http.server 4179

14. ProSyncReader & ProFiler Search

ProSync integrates seamlessly with the ProFiler companion search utility (ProSyncReader.py):

Full-text search across synchronized files and SQLite metadata catalogs.
Instant preview for PDF and text documents.
Direct launch integration from the ProSync main interface.

python ProSyncReader.py

15. Windows Store & MSIX Staging

ProSync includes complete Microsoft Store / MSIX staging materials:

AppxManifest: Located at store_package/ProSync/AppxManifest.xml with Desktop Bridge identity Geiger.ProSync.
Policy 10.1.3 Compliance: Rigorously curated keywords (max 7 high-intent terms).
Automated Verification:
```
python scripts/check_store_readiness.py
```
Local Executable Build: build_exe.bat creates standalone frozen executables for Windows.

16. Testing & Quality Checks

Last verified on 2026-09-18: 124 Python tests and 29 Web/PWA tests passed (153 total tests).

# Compile check across all core modules
python -m compileall -q ProSyncStart_V3.1.py ProSyncReader.py prosync_utils.py schedule_time.py logger.py run_tests.py

# Run comprehensive test suite
python -m pytest -ra -v

# Run local orchestrator
python run_tests.py

# Lint with Ruff
python -m ruff check .

# Verify web companion test suite
cd web_companion
npm test
node --check app.js
node --check library.js
node --check sw.js

17. Third-Party Licenses & Transparency

ProSync is licensed under the permissive MIT License.

Dynamic Linking Isolation: PySide6 (LGPL-3.0) and Paramiko (LGPL-2.1) are dynamically linked via standard CPython wheels. In standalone distributions, Qt shared objects remain separate in compliance with LGPL-3.0 Section 4.
Unprivileged User Mode (RunAsInvoker): Strictly executes in unprivileged user space without administrative prompts.
Detailed Software Inventory: Refer to THIRD_PARTY_LICENSES.md and THIRD_PARTY_LICENSES.txt for complete SPDX identifiers, URLs, and upstream notices.

18. Security Policy & Sibling Ecosystem

ProSync is maintained by file-bricks under the open-bricks open-source initiative. For vulnerability reporting, consult SECURITY.md (48-hour response SLA).

Sibling Ecosystem Matrix

Repository	Org	Description	Focus Area
ProSync	`file-bricks`	Intelligent backup sync & SQLite WAL database protection	Backup & Database Safety
ExplorerPro	`file-bricks`	Advanced multi-tab desktop file manager & workspace organizer	File Management
CloudLockFixer	`file-bricks`	Cloud sync lock resolver, offline cache validator & unblocker	Cloud Sync Hygiene
ProFiler	`file-bricks`	Deep file indexing, metadata tagging & search companion	File Indexing & Search
NoteSpaceLLM	`file-bricks`	Local desktop notes workspace with AI augmentations	Local Notes & Knowledge
WinStorePackager	`file-bricks`	Automated MSIX & Windows Store packaging toolchain	App Store Tooling
UniversalDocsGrabber	`doc-bricks`	Universal document acquisition, OCR, and redacted PWA reader	Document Processing
MediaBrain	`doc-bricks`	Intelligent media cataloging and asset indexing	Media Management
CleanMarkdown	`doc-bricks`	Markdown sanitization, link validation, and typography linter	Markdown Hygiene
ellmos-filecommander-mcp	`ellmos-ai`	Local-first 47-tool MCP server for files, search & diagnostics	Agent Tooling
lock-master	`ellmos-ai`	Distributed agent file-claim coordination & lock arbitration	Agent Concurrency
WikiStub-Seed	`dev-bricks`	Automated documentation generator & multilingual stub creator	Developer Tooling
open-bricks	`open-bricks`	Umbrella organization for privacy-first developer tools	Open-Source Umbrella

Name		Name	Last commit message	Last commit date
.github/workflows		.github/workflows
README/screenshots/store		README/screenshots/store
_WARTUNG		_WARTUNG
_sources		_sources
assets		assets
locales		locales
mobile_icons		mobile_icons
releases/windowsstore		releases/windowsstore
screenshots		screenshots
scripts		scripts
store_assets		store_assets
store_package/ProSync		store_package/ProSync
tests		tests
web_companion		web_companion
.gitattributes		.gitattributes
.gitignore		.gitignore
BEFUNDE.md		BEFUNDE.md
CHANGELOG.md		CHANGELOG.md
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
CROSS_OS_CONFLICT_RULES.md		CROSS_OS_CONFLICT_RULES.md
DesktopIcon.ico		DesktopIcon.ico
DesktopIcon.png		DesktopIcon.png
EXPORTFORMAT.md		EXPORTFORMAT.md
ICO.ico		ICO.ico
ICO_TRAY.ico		ICO_TRAY.ico
LICENSE		LICENSE
MARKETING-LOG.txt		MARKETING-LOG.txt
PRIVACY_POLICY.md		PRIVACY_POLICY.md
ProSync.ico		ProSync.ico
ProSync.png		ProSync.png
ProSyncReader.py		ProSyncReader.py
ProSyncStart_V3.1.py		ProSyncStart_V3.1.py
ProSync_config.example.json		ProSync_config.example.json
README.es.md		README.es.md
README.md		README.md
README_de.md		README_de.md
SCHEDULE_CONTRACT.md		SCHEDULE_CONTRACT.md
SECURITY.md		SECURITY.md
SFTP_TARGETS.md		SFTP_TARGETS.md
START.bat		START.bat
STORE_LISTING.md		STORE_LISTING.md
SUPPORT.md		SUPPORT.md
THIRD_PARTY_LICENSES.md		THIRD_PARTY_LICENSES.md
THIRD_PARTY_LICENSES.txt		THIRD_PARTY_LICENSES.txt
USER_GUIDE.md		USER_GUIDE.md
WINDOWS_STORE_PREP.md		WINDOWS_STORE_PREP.md
build_exe.bat		build_exe.bat
cross_os_rules.py		cross_os_rules.py
favicon.ico		favicon.ico
favicon.png		favicon.png
icon.ico		icon.ico
icon.png		icon.png
llms.txt		llms.txt
logger.py		logger.py
manage_translations.py		manage_translations.py
prosync_utils.py		prosync_utils.py
pyproject.toml		pyproject.toml
requirements.txt		requirements.txt
run_tests.py		run_tests.py
schedule_time.py		schedule_time.py
source_platform_smoke.py		source_platform_smoke.py
store_package.json		store_package.json
test_batch_sync_queue.py		test_batch_sync_queue.py
test_batch_sync_queue_bugs.py		test_batch_sync_queue_bugs.py
test_cli_headless.py		test_cli_headless.py
test_companion_launch.py		test_companion_launch.py
test_config_manager.py		test_config_manager.py
test_core_safety_regressions.py		test_core_safety_regressions.py
test_cross_os_rules.py		test_cross_os_rules.py
test_daily_scheduler.py		test_daily_scheduler.py
test_database_safety.py		test_database_safety.py
test_folder_sync_worker_bugs.py		test_folder_sync_worker_bugs.py
test_import_streams.py		test_import_streams.py
test_portable_profile.py		test_portable_profile.py
test_schedule_time.py		test_schedule_time.py
test_sftp_target.py		test_sftp_target.py
test_sync_worker.py		test_sync_worker.py
test_translator.py		test_translator.py
test_ui_accessibility.py		test_ui_accessibility.py
translator.py		translator.py

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ProSync

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1. Features & Core Capabilities

2. System Architecture & Data Flow

3. Target Personas & Discoverability

Target Personas

High-Intent Search Queries

4. Comparative Matrix vs. Alternatives

5. Dual Mermaid Diagrams

System Architecture Topology (`flowchart TD`)

End-to-End Backup & WAL Checkpoint Lifecycle (`sequenceDiagram`)

6. Governance & Runtime Invariants

7. Synchronization Modes & Semantics

8. SQLite WAL Database Protection

Supported Database Extensions

Protection Rules

9. Visual Showcase & Feature Gallery

10. Installation & Dependencies

Core Runtime Dependencies

11. CLI & Headless Automation

12. Scheduled Backups & IANA Timezones

13. Portable Web/PWA Companion

14. ProSyncReader & ProFiler Search

15. Windows Store & MSIX Staging

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ProSync

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1. Features & Core Capabilities

2. System Architecture & Data Flow

3. Target Personas & Discoverability

Target Personas

High-Intent Search Queries

4. Comparative Matrix vs. Alternatives

5. Dual Mermaid Diagrams

System Architecture Topology (flowchart TD)

End-to-End Backup & WAL Checkpoint Lifecycle (sequenceDiagram)

6. Governance & Runtime Invariants

7. Synchronization Modes & Semantics

8. SQLite WAL Database Protection

Supported Database Extensions

Protection Rules

9. Visual Showcase & Feature Gallery

10. Installation & Dependencies

Core Runtime Dependencies

11. CLI & Headless Automation

12. Scheduled Backups & IANA Timezones

13. Portable Web/PWA Companion

14. ProSyncReader & ProFiler Search

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