diff --git a/.dependency-cruiser.cjs b/.dependency-cruiser.cjs
index ad306ee3d84..5e8c1e11def 100644
--- a/.dependency-cruiser.cjs
+++ b/.dependency-cruiser.cjs
@@ -19,6 +19,35 @@ module.exports = {
       from: { path: '(^|/)src/(routes|ui)/' },
       to: { path: '(^|/)src/common/database\\.ts$' },
     },
+    {
+      name: 'domain-no-outward-deps',
+      comment:
+        'domain is the hexagon center: pure business logic with zero dependency on application, ' +
+        'infrastructure, any app, or Electron/transport libs. Everything else depends on domain, never ' +
+        'the reverse.',
+      severity: 'warn',
+      from: { path: '^domain/' },
+      to: { path: '^(application|infrastructure|apps)/|^(node_modules/)?electron($|/)' },
+    },
+    {
+      name: 'application-domain-only',
+      comment:
+        'application orchestrates domain entities/repositories and depends on domain only - never ' +
+        'infrastructure (concrete adapters) or a specific app.',
+      severity: 'warn',
+      from: { path: '^application/' },
+      to: { path: '^(infrastructure|apps)/' },
+    },
+    {
+      name: 'infrastructure-no-application-or-apps',
+      comment:
+        'infrastructure implements domain-defined ports and depends on domain plus external libs/' +
+        'Electron/Node - never application (that direction is backwards) or a specific app (infrastructure ' +
+        'is reached from an app\'s bootstrap/wiring code, not the other way around).',
+      severity: 'warn',
+      from: { path: '^infrastructure/' },
+      to: { path: '^(application|apps)/' },
+    },
   ],
   options: {
     doNotFollow: {
diff --git a/application/package.json b/application/package.json
new file mode 100644
index 00000000000..11253031b28
--- /dev/null
+++ b/application/package.json
@@ -0,0 +1,27 @@
+{
+  "private": true,
+  "name": "application",
+  "license": "Apache-2.0",
+  "version": "13.1.0",
+  "author": "Kong <office@konghq.com>",
+  "description": "Use cases that orchestrate domain entities and repositories, plus cross-cutting application-level ports (NetworkClient, TemplatingEngine, Clock, IdGenerator, ...). Depends on domain only.",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Kong/insomnia.git",
+    "directory": "application"
+  },
+  "bugs": {
+    "url": "https://github.com/kong/insomnia/issues"
+  },
+  "homepage": "https://github.com/Kong/insomnia#readme",
+  "exports": {
+    ".": {
+      "import": "./src/index.ts",
+      "types": "./src/index.ts"
+    }
+  },
+  "scripts": {
+    "lint": "eslint . --ext .ts,.tsx --cache",
+    "type-check": "tsc --noEmit --project tsconfig.json"
+  }
+}
diff --git a/application/src/index.ts b/application/src/index.ts
new file mode 100644
index 00000000000..4fec6058e37
--- /dev/null
+++ b/application/src/index.ts
@@ -0,0 +1,6 @@
+// application: use cases that orchestrate domain entities and repositories, plus
+// cross-cutting application-level ports (NetworkClient, TemplatingEngine, Clock,
+// IdGenerator, ...). Depends on domain only.
+// Populated incrementally, one aggregate at a time.
+// eslint-disable-next-line unicorn/require-module-specifiers -- placeholder until real exports land
+export {};
diff --git a/application/tsconfig.json b/application/tsconfig.json
new file mode 100644
index 00000000000..5518ce9aab1
--- /dev/null
+++ b/application/tsconfig.json
@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "strict": true,
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "useUnknownInCatchVariables": false,
+    "target": "es2022",
+    "module": "ESNext",
+    "noEmit": true,
+    "lib": ["ES2023"]
+  },
+  "include": ["src"]
+}
diff --git a/domain/package.json b/domain/package.json
new file mode 100644
index 00000000000..3f77b4cfcd5
--- /dev/null
+++ b/domain/package.json
@@ -0,0 +1,27 @@
+{
+  "private": true,
+  "name": "domain",
+  "license": "Apache-2.0",
+  "version": "13.1.0",
+  "author": "Kong <office@konghq.com>",
+  "description": "Pure business logic - entities, value objects, and the Repository/port interfaces implemented by infrastructure. No I/O, no framework or runtime dependencies.",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Kong/insomnia.git",
+    "directory": "domain"
+  },
+  "bugs": {
+    "url": "https://github.com/kong/insomnia/issues"
+  },
+  "homepage": "https://github.com/Kong/insomnia#readme",
+  "exports": {
+    ".": {
+      "import": "./src/index.ts",
+      "types": "./src/index.ts"
+    }
+  },
+  "scripts": {
+    "lint": "eslint . --ext .ts,.tsx --cache",
+    "type-check": "tsc --noEmit --project tsconfig.json"
+  }
+}
diff --git a/domain/src/index.ts b/domain/src/index.ts
new file mode 100644
index 00000000000..0b76107b8bd
--- /dev/null
+++ b/domain/src/index.ts
@@ -0,0 +1,5 @@
+// domain: pure business logic - entities, value objects, and the Repository/port
+// interfaces implemented by infrastructure. No I/O, no framework or runtime dependencies.
+// Populated incrementally, one aggregate at a time.
+// eslint-disable-next-line unicorn/require-module-specifiers -- placeholder until real exports land
+export {};
diff --git a/domain/tsconfig.json b/domain/tsconfig.json
new file mode 100644
index 00000000000..5518ce9aab1
--- /dev/null
+++ b/domain/tsconfig.json
@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "strict": true,
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "useUnknownInCatchVariables": false,
+    "target": "es2022",
+    "module": "ESNext",
+    "noEmit": true,
+    "lib": ["ES2023"]
+  },
+  "include": ["src"]
+}
diff --git a/infrastructure/package.json b/infrastructure/package.json
new file mode 100644
index 00000000000..d9f7bf9c848
--- /dev/null
+++ b/infrastructure/package.json
@@ -0,0 +1,27 @@
+{
+  "private": true,
+  "name": "infrastructure",
+  "license": "Apache-2.0",
+  "version": "13.1.0",
+  "author": "Kong <office@konghq.com>",
+  "description": "Adapters implementing domain- and application-defined ports (persistence, network, sync, secret storage). Depends on domain plus external libs/Electron/Node. Only reachable from each app's own bootstrap/wiring code, never from route/command logic directly.",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Kong/insomnia.git",
+    "directory": "infrastructure"
+  },
+  "bugs": {
+    "url": "https://github.com/kong/insomnia/issues"
+  },
+  "homepage": "https://github.com/Kong/insomnia#readme",
+  "exports": {
+    ".": {
+      "import": "./src/index.ts",
+      "types": "./src/index.ts"
+    }
+  },
+  "scripts": {
+    "lint": "eslint . --ext .ts,.tsx --cache",
+    "type-check": "tsc --noEmit --project tsconfig.json"
+  }
+}
diff --git a/infrastructure/src/index.ts b/infrastructure/src/index.ts
new file mode 100644
index 00000000000..5612ce37ed0
--- /dev/null
+++ b/infrastructure/src/index.ts
@@ -0,0 +1,6 @@
+// infrastructure: adapters implementing domain- and application-defined ports
+// (persistence, network, sync, secret storage). Depends on domain plus external
+// libs/Electron/Node. Only reachable from each app's own bootstrap/wiring code.
+// Populated incrementally, one aggregate at a time.
+// eslint-disable-next-line unicorn/require-module-specifiers -- placeholder until real exports land
+export {};
diff --git a/infrastructure/tsconfig.json b/infrastructure/tsconfig.json
new file mode 100644
index 00000000000..67b8ef4d94a
--- /dev/null
+++ b/infrastructure/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "strict": true,
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "useUnknownInCatchVariables": false,
+    "target": "es2022",
+    "module": "ESNext",
+    "noEmit": true,
+    "lib": ["ES2023"],
+    "types": ["node"]
+  },
+  "include": ["src"]
+}
diff --git a/package-lock.json b/package-lock.json
index 2038925254d..b65cadf68bc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,9 @@
       "workspaces": [
         "apps/desktop",
         "apps/cli",
+        "domain",
+        "application",
+        "infrastructure",
         "packages/insomnia-testing",
         "packages/insomnia-data",
         "packages/insomnia-analytics",
@@ -57,6 +60,10 @@
         "npm": ">=11"
       }
     },
+    "application": {
+      "version": "13.1.0",
+      "license": "Apache-2.0"
+    },
     "apps/cli": {
       "name": "insomnia-inso",
       "version": "13.1.0",
@@ -331,6 +338,14 @@
         "url": "https://github.com/sponsors/colinhacks"
       }
     },
+    "domain": {
+      "version": "13.1.0",
+      "license": "Apache-2.0"
+    },
+    "infrastructure": {
+      "version": "13.1.0",
+      "license": "Apache-2.0"
+    },
     "node_modules/@apideck/better-ajv-errors": {
       "version": "0.3.7",
       "resolved": "https://registry.npmjs.org/@apideck/better-ajv-errors/-/better-ajv-errors-0.3.7.tgz",
@@ -12670,6 +12685,10 @@
       "dev": true,
       "license": "BSD-2-Clause"
     },
+    "node_modules/application": {
+      "resolved": "application",
+      "link": true
+    },
     "node_modules/arg": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/arg/-/arg-5.0.2.tgz",
@@ -15546,6 +15565,10 @@
         "url": "https://github.com/cheeriojs/dom-serializer?sponsor=1"
       }
     },
+    "node_modules/domain": {
+      "resolved": "domain",
+      "link": true
+    },
     "node_modules/domelementtype": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-2.3.0.tgz",
@@ -19297,6 +19320,10 @@
         "wrappy": "1"
       }
     },
+    "node_modules/infrastructure": {
+      "resolved": "infrastructure",
+      "link": true
+    },
     "node_modules/inherits": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
diff --git a/package.json b/package.json
index 16fa3980376..362e5239d1f 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,9 @@
   "workspaces": [
     "apps/desktop",
     "apps/cli",
+    "domain",
+    "application",
+    "infrastructure",
     "packages/insomnia-testing",
     "packages/insomnia-data",
     "packages/insomnia-analytics",
@@ -30,9 +33,10 @@
     "lint": "npm run lint --workspaces --if-present",
     "type-check": "npm run type-check --workspaces --if-present",
     "test": "npm run test --workspaces --if-present",
-    "check-boundaries": "npm run check-boundaries:insomnia-data && npm run check-boundaries:insomnia",
+    "check-boundaries": "npm run check-boundaries:insomnia-data && npm run check-boundaries:insomnia && npm run check-boundaries:hexagon",
     "check-boundaries:insomnia-data": "depcruise packages/insomnia-data/src packages/insomnia-data/node-src packages/insomnia-data/common-src --config .dependency-cruiser.cjs",
     "check-boundaries:insomnia": "cd apps/desktop && depcruise src --config ../../.dependency-cruiser.cjs --ts-config tsconfig.json",
+    "check-boundaries:hexagon": "depcruise domain/src application/src infrastructure/src --config .dependency-cruiser.cjs",
     "clean": "git clean -dfX",
     "install-libcurl-electron": "node-pre-gyp install --directory node_modules/@getinsomnia/node-libcurl --update-binary --runtime=electron --target=43.2.0",
     "install-libcurl-node": "node-pre-gyp install --directory node_modules/@getinsomnia/node-libcurl --update-binary --runtime=node --target=24.18.0",