Introduce TempoRuntime: consolidate globalThis inter-module state into a single hardened bridge

CHANGELOG.md

@@ -7,6 +7,23 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.2.5] - 2026-04-20
+
+### Added
+- **Cross-Bundle Singleton Stability**: Implemented a symbol-based brand check for `TempoRuntime` to ensure reliable singleton resolution even when multiple versions of the library are loaded.
+
+### Changed
+- **Consolidated Internal Storage**: Merged redundant internal term/plugin arrays into a unified, validated `pluginsDb` within `TempoRuntime`, reducing memory overhead and improving consistency.
+- **Refined Year Semantics**: Normalized the `year` component in term templates to intelligently distinguish between relative offsets (e.g., year `0`) and absolute historical years (e.g., year `2000`).
+- **Improved Type Safety**: Renamed the exported `Match` type to `MatchResult` to resolve naming conflicts with the `Match` runtime class.
+
+### Fixed
+- **Term Resolution Accuracy**: Fixed a sorting bug in the yearly-cycle resolution engine that caused incorrect anchor identification for non-calendar-ordered term groups (e.g., seasons).
+- **Documentation Integrity**: Updated architecture and README guides to point to the correct `#tempo/support` module and provided functional, complete importmap examples for browser environments.
+- **HTML Standards Compliance**: Wrapped library demonstration and test pages in proper HTML5 skeletons to ensure consistent rendering and prevent quirks-mode issues.
+- **Package Optimization**: Refined `sideEffects` in `package.json` to exclude non-published source files, improving tree-shaking for consumer builds.
+
+
 ## [2.2.4] - 2026-04-19
 
 ### Fixed

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tempo-monorepo",
-  "version": "2.2.4",
+  "version": "2.2.5",
   "private": true,
   "description": "Magma Computing Monorepo",
   "repository": {
@@ -41,4 +41,4 @@
     "typescript": "^6.0.2",
     "vitest": "^2.1.8"
   }
-}
+}

packages/library/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@magmacomputing/library",
-  "version": "2.2.4",
+  "version": "2.2.5",
   "description": "Shared utility library for Tempo",
   "author": "Magma Computing Solutions",
   "license": "MIT",

packages/library/src/common/array.library.ts

@@ -1,7 +1,7 @@
 import { asString } from '#library/coercion.library.js';
 import { extract, ownEntries } from '#library/primitive.library.js';
 import { stringify } from '#library/serialize.library.js';
-import { isNumber, isDate, isTempo, isObject, isDefined, isUndefined, isFunction, nullToValue } from '#library/type.library.js';
+import { isNumber, isDate, isObject, isDefined, isUndefined, isFunction, nullToValue } from '#library/type.library.js';
 import type { Property } from '#library/type.library.js';
 
 // adapted from https://jsbin.com/insert/4/edit?js,output
@@ -54,7 +54,7 @@ export function sortBy<T extends Property<T>>(...keys: (PropertyKey | SortBy)[])
 				switch (true) {
 					case isNumber(valueA) && isNumber(valueB):
 					case isDate(valueA) && isDate(valueB):
-					case isTempo(valueA) && isTempo(valueB):
+					case isObject(valueA) && isObject(valueB) && typeof valueA.valueOf() === 'number':
 						result = dir * (valueA - valueB);
 						break;
 

packages/library/src/common/type.library.ts

@@ -1,6 +1,5 @@
 import lib from '#library/symbol.library.js';
 
-const $isTempo = Symbol.for('$isTempo');
 const registry: Instance[] = [];														// global types for getType
 
 /** the primitive type reported by toStringTag() */
@@ -115,10 +114,6 @@ export const isPlainYearMonth = <T>(obj: T): obj is Extract<T, Temporal.PlainYea
 export const isPlainMonthDay = <T>(obj: T): obj is Extract<T, Temporal.PlainMonthDay> => isType(obj, 'Temporal.PlainMonthDay') || (!!(globalThis as any).Temporal?.PlainMonthDay && (obj as any) instanceof (globalThis as any).Temporal.PlainMonthDay);
 
 // non-standard Objects
-export const isTempo = <T>(obj?: T): obj is Extract<T, GetType<'Tempo'>> => {
-	const raw = (obj as any)?.[lib.$Target] ?? obj;								// bypass Proxy traps
-	return !!(raw?.[$isTempo]);
-}
 export const isEnum = <T, E extends Property<any>>(obj?: T): obj is Extract<T, GetType<'Enumify', E>> => isType(obj, 'Enumify');
 export const isPledge = <T, P = any>(obj?: T): obj is Extract<T, GetType<'Pledge', P>> => isType(obj, 'Pledge');
 
@@ -172,7 +167,7 @@ const isClassConstructor = (obj: any): boolean => {
 	const tag = raw?.[Symbol.toStringTag] ?? raw?.prototype?.[Symbol.toStringTag];
 
 	// Absolute bypass for Tempo and Temporal identities (using global brands)
-	if (raw?.[$isTempo] || name === 'Tempo' || tag === 'Tempo' || (typeof tag === 'string' && (tag.startsWith('Temporal.') || tag.startsWith('Tempo.')))) return true;
+	if (name === 'Tempo' || tag === 'Tempo' || (typeof tag === 'string' && (tag.startsWith('Temporal.') || tag.startsWith('Tempo.')))) return true;
 	if (typeof tag === 'string' && tag.endsWith('Function')) return false;	// check the tag directly to avoid misidentifying function as class
 
 	const globalRegistry = (globalThis as any)[lib.$Registry] ?? [];

packages/tempo/README.md

@@ -87,7 +87,7 @@ Since Tempo is a native ESM package, you can use it directly in modern browsers
 <script type="importmap">
 {
   "imports": {
-    "@magmacomputing/tempo": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/bundle"
+    "@magmacomputing/tempo": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/tempo.bundle.esm.js"
   }
 }
 </script>
@@ -102,7 +102,7 @@ Since Tempo is a native ESM package, you can use it directly in modern browsers
 For environments without `importmap` support or simple prototypes, use the global bundle. This automatically attaches the `Tempo` class to the `window` object.
 
 ```html
-<script src="https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/global"></script>
+<script src="https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/tempo.bundle.js"></script>
 <script>
   const t = new Tempo('tomorrow');
   console.log(t.toString());
@@ -116,8 +116,10 @@ For maximum performance, you can use the lean **Core** engine and opt-in to spec
 <script type="importmap">
 {
   "imports": {
-    "@magmacomputing/tempo/core": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/core",
-    "@magmacomputing/tempo/mutate": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/mutate"
+    "@magmacomputing/tempo/core": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/core.index.js",
+    "@magmacomputing/tempo/mutate": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/plugin/module/module.mutate.js",
+    "@magmacomputing/library": "https://cdn.jsdelivr.net/npm/@magmacomputing/library@2/dist/common.index.js",
+    "@js-temporal/polyfill": "https://cdn.jsdelivr.net/npm/@js-temporal/polyfill@0.5/dist/index.esm.js"
   }
 }
 </script>
@@ -133,6 +135,9 @@ For maximum performance, you can use the lean **Core** engine and opt-in to spec
 </script>
 ```
 
+> [!TIP]
+> **CDN Versioning**: The examples above use pinned versions (`@magmacomputing/tempo@2`, `@magmacomputing/library@2`, `@js-temporal/polyfill@0.5`) for production stability. To use the latest releases, you can omit the version string from every URL (e.g., remove `@2` from all Magma entries and `@0.5` from the polyfill). Ensure all `@magmacomputing/...` entries resolve to the same release to avoid mixed-version loading.
+
 ---
 
 ## 📚 Documentation

packages/tempo/bin/core.ts

@@ -1,9 +1,8 @@
 import { Tempo, enums } from '#tempo/core';
-import { stringify, objectify, enumify, getType } from '#library';
-import { Token, Snippet } from '#tempo/tempo.default.js';
+import { stringify, objectify, enumify, getType, Pledge } from '#library';
 
 // Pre-load Tempo and Token to the global scope for ease of use in the core REPL
-Object.assign(globalThis, { Tempo, Token, Snippet, getType, stringify, objectify, enumify, enums });
+Object.assign(globalThis, { Tempo, getType, stringify, objectify, enumify, Pledge, enums });
 
 console.log(`\n\x1b[38;2;252;194;1m\x1b[1m ⏳ Tempo (core) \x1b[0m\x1b[38;2;45;212;191mREPL initialized (core only).\x1b[0m\n`);
 

packages/tempo/doc/Tempo.md

@@ -29,16 +29,10 @@ Tempo is an ESM-first library. You can use it in the browser without a build ste
 <script type="importmap">
 {
   "imports": {
-    "@magmacomputing/tempo": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/tempo.index.js",
-    "@magmacomputing/tempo/core": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/core.index.js",
-    "@magmacomputing/tempo/ticker": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/plugin/extend/extend.ticker.js",
-    "@magmacomputing/tempo/duration": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/plugin/module/module.duration.js",
-    "@magmacomputing/tempo/format": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/plugin/module/module.format.js",
-    "@magmacomputing/tempo/plugin": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/plugin/plugin.index.js",
-    "@magmacomputing/tempo/enums": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/tempo.enum.js",
-    "@magmacomputing/tempo/library": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo/dist/library.index.js",
-    "@magmacomputing/library": "https://cdn.jsdelivr.net/npm/@magmacomputing/library/dist/common.index.js",
-    "@js-temporal/polyfill": "https://cdn.jsdelivr.net/npm/@js-temporal/polyfill/dist/index.esm.min.js"
+    "@magmacomputing/tempo/core": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/core.index.js",
+    "@magmacomputing/tempo/mutate": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/plugin/module/module.mutate.js",
+    "@magmacomputing/library": "https://cdn.jsdelivr.net/npm/@magmacomputing/library@2/dist/common.index.js",
+    "@js-temporal/polyfill": "https://cdn.jsdelivr.net/npm/@js-temporal/polyfill@0.5/dist/index.esm.js"
   }
 }
 </script>
@@ -49,12 +43,15 @@ Tempo is an ESM-first library. You can use it in the browser without a build ste
 For legacy environments or simple prototypes, use the single-file bundle:
 
 ```html
-<script src="/path/to/tempo/dist/tempo.bundle.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/tempo.bundle.js"></script>
 <script>
   const t = new Tempo();
 </script>
 ```
 
+> [!TIP]
+> **CDN Versioning**: The examples above use pinned versions (`@magmacomputing/tempo@2`, `@magmacomputing/library@2`, `@js-temporal/polyfill@0.5`) for production stability. To use the latest releases, you can omit the version string from every URL (e.g., remove `@2` from all Magma entries and `@0.5` from the polyfill). Ensure all `@magmacomputing/...` entries resolve to the same release to avoid mixed-version loading.
+
 ---
 
 ## Installation

packages/tempo/doc/architecture.md

@@ -3,6 +3,27 @@
 Tempo v2.0.1 introduces several industry-leading architectural patterns designed for maximum resilience in complex Monorepo and Proxy-wrapped environments.
 
 ## 🌐 Shared Global Registry
+
+### TempoRuntime — single hardened bridge (v2.2+)
+
+Prior to v2.2, Tempo spread its inter-module state across many `globalThis[Symbol.for(…)]` slots (`$terms`, `$extends`, `$modules`, `$installed`, `$reset`, `$Plugins`, `$Register`).  Each slot was a potential tamper target and the scattered writes made the global namespace harder to audit.
+
+As of v2.2, all of that bookkeeping is consolidated inside a single **`TempoRuntime`** object (`#tempo/support`).  The runtime is stored on `globalThis` under one hardened property:
+
+```typescript
+Symbol.for('magmacomputing/tempo/runtime')
+```
+
+The property descriptor is `enumerable: false, configurable: false, writable: false`.  External code can neither replace nor delete the runtime.
+
+**Benefits:**
+- **Reduced global footprint** — one slot instead of seven.
+- **Centralised hardening** — input validation (`addTerm`, `addPlugin`) and hook management (`setRegisterHook`, `fireRegisterHook`) live in one place.
+- **Scoped runtimes (Experimental)** — `TempoRuntime.createScoped()` returns a fresh, isolated runtime that is *not* stored on `globalThis`, enabling clean test isolation without globalThis manipulation.  **Note**: Scoped runtimes are currently an experimental internal feature and are not yet fully threaded through all core utilities.  Scoped runtimes are not pinned to `globalThis`, lack the `defineProperty` descriptor protections of the primary instance, and instead rely solely on the lexical reference returned (contrasting with the hardened `getRuntime()` and `globalThis[BRIDGE]` behavior). Implementation examples of this test-scoping pattern can be found in [plugin_registration.test.ts](../test/plugin_registration.test.ts) and [duration.core.test.ts](../test/duration.core.test.ts).
+- **Multi-bundle / HMR safety** — `getRuntime()` checks `globalThis[BRIDGE]` before constructing, so two bundle copies of Tempo always share the same runtime object, preserving the original split-brain guarantee.
+
+**User-facing "Global Discovery" slots remain on `globalThis`.**  The `sym.$Tempo` slot (and custom discovery symbols passed to `Tempo.init`) are intentionally user-readable, so they stay as ordinary writable properties.  Only internal bookkeeping moved into the runtime.
+
 To solve the "Split-Brain" issue inherent in monorepo development (where multiple instances of the same library might be loaded), Tempo utilizes a **Shared Global Registry**. By leveraging `Symbol.for('magmacomputing/library/registry')` on `globalThis`, all versions of the Tempo and Library packages share a unified type-identification engine. This ensures that classes are correctly identified as constructors even when loaded across different module boundaries.
 
 ## 🕵️ Decoupled Logging (Logify)

packages/tempo/doc/releases/v2.x.md

@@ -1,5 +1,24 @@
 # 📜 Version 2.x History
 
+## [v2.2.5] - 2026-04-20
+### 🏗️ Modular Hardening
+- **Singleton Resilience**: Replaced `instanceof` checks in `TempoRuntime` with a cross-bundle brand check, ensuring singletons are correctly adopted across bundle boundaries and HMR reloads.
+- **Unified Discovery**: Consolidated internal storage for term and extension plugins into a single, validated `pluginsDb` structure.
+- **Resolved Shadowing**: Eliminated parameter shadowing in runtime hook methods to ensure reliable event emission.
+
+### 🔍 Term Resolution Refinements
+- **Chronological Stability**: Enforced chronological sorting in `resolveCycleWindow` for accurate cycle anchor identification.
+- **Absolute vs Relative Years**: Normalized year handling to allow templates to mix relative offsets and absolute historical years seamlessly.
+
+### 📚 Documentation & UX
+- **Standards Mode**: Modernized all public demonstration files with proper HTML5 skeletons and metadata.
+- **Contextual Guidance**: Updated architecture docs and READMEs with accurate module paths and functional importmap examples.
+
+## [v2.2.4] - 2026-04-19
+### 🛡️ Production Safety
+- **Immutable Compatibility**: Added redefinition guards to `TickerModule` to prevent errors on already-frozen classes.
+- **ESM Integrity**: Bundled `tslib` into granular ESM builds to resolve resolution failures in standard browser environments.
+
 ## [v2.2.3] - 2026-04-20
 ### New Features
 

packages/tempo/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@magmacomputing/tempo",
-  "version": "2.2.4",
+  "version": "2.2.5",
   "description": "The Tempo core library",
   "author": "Magma Computing Solutions",
   "license": "MIT",
@@ -27,11 +27,13 @@
     "**/*-polyfill.ts",
     "**/module.*.js",
     "**/module.*.ts",
-    "**/tempo.index.js",
-    "src/tempo.index.ts"
+    "**/tempo.index.js"
   ],
   "main": "dist/tempo.index.js",
   "types": "dist/tempo.index.d.ts",
+  "browser": "dist/tempo.bundle.js",
+  "unpkg": "dist/tempo.bundle.js",
+  "jsdelivr": "dist/tempo.bundle.js",
   "imports": {
     "#library": "@magmacomputing/library",
     "#library/*.js": "@magmacomputing/library/common/*.js",
@@ -91,6 +93,14 @@
       "development": "./src/plugin/term/term.*.ts",
       "default": "./dist/plugin/term/term.*.js"
     },
+    "#tempo/support": {
+      "development": "./src/support/support.index.ts",
+      "default": "./dist/support/support.index.js"
+    },
+    "#tempo/support/*.js": {
+      "development": "./src/support/*.ts",
+      "default": "./dist/support/*.js"
+    },
     "#tempo/*.js": {
       "development": "./src/*.ts",
       "default": "./dist/*.js"
@@ -102,8 +112,8 @@
       "import": "./dist/tempo.index.js"
     },
     "./enums": {
-      "types": "./dist/tempo.enum.d.ts",
-      "import": "./dist/tempo.enum.js"
+      "types": "./dist/support/tempo.enum.d.ts",
+      "import": "./dist/support/tempo.enum.js"
     },
     "./extend/*": {
       "types": "./dist/plugin/extend/extend.*.d.ts",
@@ -199,7 +209,7 @@
   },
   "devDependencies": {
     "@js-temporal/polyfill": "^0.5.1",
-    "@magmacomputing/library": "2.2.4",
+    "@magmacomputing/library": "2.2.5",
     "@rollup/plugin-alias": "^6.0.0",
     "cross-env": "^7.0.3",
     "magic-string": "^0.30.21",

packages/tempo/public/bundle.index.html

@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Tempo Bundle Test</title>
+</head>
+<body>
+	<script type="importmap">
+	{
+		"imports": {
+			"@magmacomputing/tempo": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@2/dist/tempo.bundle.esm.js",
+			"@js-temporal/polyfill": "https://cdn.jsdelivr.net/npm/@js-temporal/polyfill@0.5/dist/index.esm.js"
+		}
+	}
+	</script>
+	<script type="module">
+		import Tempo from '@magmacomputing/tempo';
+		const t = new Tempo('next friday');
+		console.log(t.format('{mon} {day}'));
+	</script>
+
+	<p>Open the console to see the output.</p>
+</body>
+</html>