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feat: Gossamer migration — RuntimeBridge, gossamer.conf.json, Tauri→Gossamer conversion
Added Gossamer configuration and RuntimeBridge alongside existing Tauri setup. Tauri files preserved for transition period. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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‎deno.json‎

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"build": "cd ui && deno task build",
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"build:rust": "cd core && cargo build --release",
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"build:tauri": "cd desktop && cargo tauri build",
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"gossamer:dev": "cd desktop && gossamer dev",
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"gossamer:build": "cd desktop && gossamer build",
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"test": "cd core && cargo test",
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"lint": "deno lint && cd core && cargo clippy",
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"fmt": "deno fmt && cd core && cargo fmt",

‎desktop/gossamer-bridge.js‎

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// SPDX-License-Identifier: PMPL-1.0-or-later
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// Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath)
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/**
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* gossamer-bridge.js — Unified IPC bridge for Nexia desktop app.
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*
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* Detects the available runtime (Gossamer, Tauri, or browser-only) and
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* dispatches `invoke` / `listen` calls to the appropriate backend. This
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* allows the Nexia desktop UI to work under both Gossamer and Tauri
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* during the migration period.
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*
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* Priority order:
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* 1. Gossamer (`window.__gossamer_invoke`) — own stack, preferred
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* 2. Tauri (`window.__TAURI__`) — legacy, transition
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* 3. Browser (stub / error) — development fallback
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*/
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/**
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* Detect which desktop runtime is available.
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* @returns {"gossamer"|"tauri"|"browser"}
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*/
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function detectRuntime() {
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if (typeof window !== 'undefined' &&
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typeof window.__gossamer_invoke === 'function') {
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return 'gossamer';
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}
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if (typeof window !== 'undefined' &&
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window.__TAURI__ != null &&
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typeof window.__TAURI__.core !== 'undefined') {
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return 'tauri';
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}
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return 'browser';
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}
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let _runtime = null;
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/**
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* Get the cached runtime identifier.
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* @returns {"gossamer"|"tauri"|"browser"}
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*/
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export function runtime() {
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if (_runtime === null) {
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_runtime = detectRuntime();
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}
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return _runtime;
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}
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/**
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* Invoke a backend command through whatever runtime is available.
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*
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* - On Gossamer: calls `window.__gossamer_invoke(cmd, args)`
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* - On Tauri: calls `window.__TAURI__.core.invoke(cmd, args)`
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* - On browser: rejects with a descriptive error
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*
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* @param {string} cmd — The command name
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* @param {object} [args] — Optional payload object
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* @returns {Promise<any>}
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*/
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export function invoke(cmd, args) {
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const rt = runtime();
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if (rt === 'gossamer') {
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return window.__gossamer_invoke(cmd, args || {});
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}
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if (rt === 'tauri') {
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return window.__TAURI__.core.invoke(cmd, args || {});
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}
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return Promise.reject(
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new Error(`No desktop runtime \u2014 "${cmd}" requires Gossamer or Tauri`)
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);
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}
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/**
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* Listen for backend events.
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*
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* - On Gossamer: calls `window.__gossamer_listen(event, handler)`
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* - On Tauri: calls `window.__TAURI__.event.listen(event, handler)`
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* - On browser: returns a no-op unlisten function
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*
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* @param {string} event — The event name
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* @param {function} handler — Callback receiving `{ payload: ... }`
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* @returns {Promise<function>} Unlisten function
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*/
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export function listen(event, handler) {
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const rt = runtime();
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if (rt === 'gossamer') {
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if (typeof window.__gossamer_listen === 'function') {
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return window.__gossamer_listen(event, handler);
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}
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console.warn('[gossamer-bridge] Gossamer event listener not available for:', event);
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return Promise.resolve(() => {});
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}
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if (rt === 'tauri') {
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return window.__TAURI__.event.listen(event, handler);
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}
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console.warn('[gossamer-bridge] No desktop runtime \u2014 ignoring event listener for:', event);
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return Promise.resolve(() => {});
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}
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/**
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* Whether any desktop runtime is available.
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* @returns {boolean}
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*/
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export function hasDesktopRuntime() {
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return runtime() !== 'browser';
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}
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/**
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* Human-readable name for the current runtime.
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* @returns {string}
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*/
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export function runtimeName() {
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const names = { gossamer: 'Gossamer', tauri: 'Tauri', browser: 'Browser' };
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return names[runtime()] || 'Unknown';
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}

‎desktop/gossamer.conf.json‎

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{
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"$schema": "https://gossamer.dev/schemas/config/v1",
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"productName": "Nexia",
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"version": "0.1.0",
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"identifier": "com.hyperpolymath.nexia",
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"build": {
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"frontendDist": "../web/dist",
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"devUrl": "http://localhost:5173",
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"beforeDevCommand": "cd ../ui && deno task dev",
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"beforeBuildCommand": "cd ../ui && deno task build"
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},
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"app": {
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"windows": [
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{
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"label": "main",
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"title": "Nexia",
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"width": 1200,
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"height": 800,
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"minWidth": 800,
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"minHeight": 600,
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"maxWidth": null,
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"maxHeight": null,
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"resizable": true,
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"fullscreen": false,
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"decorations": true,
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"transparent": false,
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"center": true,
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"alwaysOnTop": false,
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"visible": true,
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"url": "/"
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}
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],
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"security": {
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"csp": null,
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"capabilities": [
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"filesystem",
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"network",
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"shell",
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"clipboard",
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"notification"
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],
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"capabilityTokens": {
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"enabled": false,
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"issuer": "gossamer-runtime",
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"ttl": 3600
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},
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"sandbox": {
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"enabled": true,
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"allowExec": false,
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"allowNetwork": true,
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"allowFilesystem": true
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}
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},
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"ipc": {
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"protocol": "json",
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"bridgeInjection": true,
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"maxMessageSize": 16777216,
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"timeout": 30000
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},
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"tray": {
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"enabled": false,
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"icon": null,
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"tooltip": null,
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"menuOnLeftClick": true
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}
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},
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"plugins": {},
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"bundle": {
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"active": true,
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"targets": [
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"deb",
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"appimage",
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"dmg",
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"nsis"
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],
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"icon": [
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"icons/32x32.png",
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"icons/128x128.png",
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"icons/128x128@2x.png",
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"icons/icon.icns",
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"icons/icon.ico"
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],
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"resources": [],
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"copyright": "Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath)",
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"license": "PMPL-1.0-or-later",
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"shortDescription": "Nexia desktop application",
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"longDescription": "",
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"linux": {
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"desktopEntry": true,
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"category": "Utility",
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"section": "utils",
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"depends": [],
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"appimage": {
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"bundleMediaFramework": false
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}
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},
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"macos": {
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"bundleIdentifier": "com.hyperpolymath.nexia",
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"minimumSystemVersion": "11.0",
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"frameworks": [],
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"entitlements": null,
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"signingIdentity": null,
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"notarization": {
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"enabled": false,
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"teamId": null
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}
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},
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"windows": {
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"webview2": "embed",
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"certificateThumbprint": null,
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"wix": {
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"language": "en-US"
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},
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"nsis": {
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"displayLanguageSelector": false,
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"installerIcon": null
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}
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}
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},
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"ephapax": {
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"modules": [],
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"region": "app",
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"linearVerification": true,
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"regionBoundary": "strict",
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"preload": []
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}
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}

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