diff --git a/.changeset/portable-compatibility.md b/.changeset/portable-compatibility.md
new file mode 100644
index 00000000..5842a335
--- /dev/null
+++ b/.changeset/portable-compatibility.md
@@ -0,0 +1,7 @@
+---
+'@tanstack/charts': patch
+---
+
+Restore the published `/portable` entry as a compatibility alias of
+`/universal`. The browser-oriented root and preferred `/universal` entry remain
+unchanged.
diff --git a/API-FRICTION.md b/API-FRICTION.md
index 10343d2f..eab9184e 100644
--- a/API-FRICTION.md
+++ b/API-FRICTION.md
@@ -3687,14 +3687,21 @@ Each entry records:
 - Friction: Changesets advanced manifests, package changelogs, and the lockfile
   but left the root README, canonical docs, comparison evidence links, and
   marketing material on 0.0.1. Merging the generated pull request would have
-  published a newer package line beside stale install and status claims.
+  published a newer package line beside stale install and status claims. The
+  synchronizer also treats every current-version literal in an allowlisted
+  source as mutable, so a second explanatory mention made the replacement
+  boundary ambiguous and failed CI.
 - Decision: derive the previous release from the generated root changelog,
   advance an explicit allowlist of release-facing sources, then run the
   repository's canonical docs sync before formatting the version pull request.
-  Historical changelog and friction evidence remain immutable.
+  Keep each allowlisted source's configured number of replaceable
+  current-version references stable; compatibility guidance should not add an
+  ambiguous extra reference. Historical changelog and friction evidence remain
+  immutable.
 - Verification: focused tests cover version-heading discovery, complete
-  replacement, idempotency, and missing-version rejection. Generated package
-  docs remain outputs of `pnpm docs:sync`, never hand-edited sources.
+  replacement, idempotency, ambiguous-reference rejection, and missing-version
+  rejection. Generated package docs remain outputs of `pnpm docs:sync`, never
+  hand-edited sources.
 
 ### F-154 — Root barrels crossed the browser host boundary
 
@@ -3706,26 +3713,34 @@ Each entry records:
   platform-neutral, but the root value barrel made bundlers traverse DOM hosts,
   adapters, reconciliation, and SVG surfaces. Its type graph also declared
   `Element`, `HTMLElement`, and `SVGSVGElement`, so a non-DOM consumer could
-  not select the universal contracts as one supported entry.
+  not select the universal contracts as one supported entry. While the naming
+  change was in flight, 0.1.0 published the initial `/portable` entry, making
+  its removal a breaking change for published consumers. The generated 0.2.0
+  release merged before the compatibility follow-up and published that removal.
+  The subsequent 0.3.0 and 0.3.1 releases also shipped before the follow-up
+  could land, so the restoration must remain a focused patch after the latest
+  release boundary.
 - Decision: preserve the existing browser-oriented root API and add
   `@tanstack/charts/universal` for common authoring/runtime values plus
   `@tanstack/charts/types` for universal contracts. The name describes the
   supported cross-runtime surface while the browser-first root remains the
-  normal web entry. DOM surface, renderer, host, and render-context types now
-  live behind an internal module while retaining their existing root
-  re-exports. Definition inputs retain DOM-free extension token contracts while
-  the generic tooltip and portal token interfaces are exported for host-adapter
-  authors. Typed DOM tooltip and portal lifecycles remain in the DOM module. Do
-  not conditionally change the root until a native host can test one coherent
-  platform contract.
-- Verification: root typechecking and 61 focused core tests pass. The packed
-  package gate resolves both new entries from `dist`, compiles their
+  normal web entry. Restore `/portable` as a compatibility alias for the
+  published 0.1.0 surface in the next patch after 0.3.1. DOM surface, renderer,
+  host, and render-context types now live behind an internal module while retaining
+  their existing root re-exports. Definition inputs retain DOM-free extension
+  token contracts while the generic tooltip and portal token interfaces are
+  exported for host-adapter authors. Typed DOM tooltip and portal lifecycles
+  remain in the DOM module. Do not conditionally change the root until a native
+  host can test one coherent platform contract.
+- Verification: root typechecking and focused core tests pass. An export test
+  verifies portable/universal runtime parity. The packed package gate resolves
+  `/portable`, `/universal`, and `/types` from `dist` and compiles their
   declarations, including tooltip definition inputs and direct generic-token
   imports, with Web Worker rather than DOM globals. Type regressions reject
   swapping tooltip and portal tokens.
   The packed bundle proof excludes the root, adapters, Canvas, DOM host/text,
   browser export, reconciliation, renderer, and SVG surface modules. That full
-  universal barrel measures 53.95 kB minified and 16.60 kB gzip; granular
+  universal barrel measures 84.30 kB minified and 26.55 kB gzip; granular
   subpaths remain the bundle-sensitive option.
 
 ### F-155 — Optional tooltip code burdened every chart consumer
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b061577f..c90a8c80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## Unreleased
+
+### Fixed
+
+- Restored `@tanstack/charts/portable` as a compatibility alias of
+  `@tanstack/charts/universal`. The browser-oriented root and preferred
+  `/universal` entry remain unchanged.
+
 ## 0.3.1
 
 ### @tanstack/charts
diff --git a/benchmarks/comparison/bundle-baseline.json b/benchmarks/comparison/bundle-baseline.json
index 584297c9..22904d09 100644
--- a/benchmarks/comparison/bundle-baseline.json
+++ b/benchmarks/comparison/bundle-baseline.json
@@ -1,8 +1,8 @@
 {
   "schemaVersion": 3,
-  "generatedAt": "2026-07-31T21:48:07.702Z",
+  "generatedAt": "2026-07-31T22:21:14.951Z",
   "packageVersions": {
-    "tanstack": "0.3.0",
+    "tanstack": "0.3.1",
     "chartjs": "4.5.1",
     "echarts": "6.1.0",
     "recharts": "3.10.1",
@@ -11,7 +11,7 @@
   "sources": {
     "tanstack": {
       "kind": "workspace",
-      "revision": "c422a2ce45799d4edd63fdbde7ecb31daa3dae31"
+      "revision": "43ae5f37661189cfeb6431e588d7610dd6542ff1"
     },
     "chartjs": {
       "kind": "package",
diff --git a/docs/comparison.md b/docs/comparison.md
index 5d640ed7..befd070e 100644
--- a/docs/comparison.md
+++ b/docs/comparison.md
@@ -4,7 +4,7 @@ description: Compare current TanStack Charts workspace source with pinned Chart.
 ---
 
 TanStack Charts `0.3.1` is a pre-alpha release. Its results on this page measure
-the exact workspace source included in this release and pinned competitor
+the exact current workspace revision recorded below and pinned competitor
 packages. This comparison records architectural differences and reproducible
 evidence without turning untested behavior into a checkmark.
 
@@ -12,14 +12,14 @@ evidence without turning untested behavior into a checkmark.
 
 | Library                                                                                | Package              | Measured source     |
 | -------------------------------------------------------------------------------------- | -------------------- | ------------------- |
-| [TanStack Charts](./overview.md)                                                       | `@tanstack/charts`   | workspace `c422a2c` |
+| [TanStack Charts](./overview.md)                                                       | `@tanstack/charts`   | workspace `43ae5f3` |
 | [Chart.js](https://www.chartjs.org/docs/latest/)                                       | `chart.js`           | npm `4.5.1`         |
 | [Apache ECharts](https://echarts.apache.org/handbook/en/best-practices/canvas-vs-svg/) | `echarts`            | npm `6.1.0`         |
 | [Recharts](https://recharts.github.io/en-US/)                                          | `recharts`           | npm `3.10.1`        |
 | [Observable Plot](https://observablehq.com/plot/features/plots)                        | `@observablehq/plot` | npm `0.6.17`        |
 
 The competitor versions are exact package pins, not latest versions inferred
-at page render time. The measured TanStack workspace revision is `c422a2c`.
+at page render time. The measured TanStack workspace revision is `43ae5f3`.
 
 ## Capability matrix
 
@@ -111,7 +111,8 @@ Canvas composition while keeping D3 and state ownership explicit.
 ## Evidence and reproduction
 
 - [Standard comparison protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/README.md)
-- [Tracked bundle baseline](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/bundle-baseline.json)
+- [Tracked current bundle baseline](https://github.com/TanStack/charts/blob/main/benchmarks/comparison/bundle-baseline.json)
+- [Tagged release bundle baseline](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/bundle-baseline.json)
 - [Stress protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/stress/README.md)
 - [Catalog conformance protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/conformance/README.md)
 
diff --git a/docs/installation.md b/docs/installation.md
index fb3e61a4..0b07036d 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -168,8 +168,11 @@ import {
 import type { ChartDefinition } from '@tanstack/charts/types'
 ```
 
-The root remains the browser-oriented compatibility entry. Subpaths expose the
-same contracts behind explicit capability boundaries.
+The root remains the primary browser-oriented entry. Subpaths expose the same
+contracts behind explicit capability boundaries.
+
+`@tanstack/charts/portable` remains a compatibility alias for existing
+consumers. New environment-neutral code should use `/universal`.
 
 Optional capabilities have explicit entries:
 
diff --git a/docs/reference/index.md b/docs/reference/index.md
index 32d9f78a..95c563a0 100644
--- a/docs/reference/index.md
+++ b/docs/reference/index.md
@@ -90,6 +90,7 @@ capabilities and individual marks independently tree-shakeable.
 | `@tanstack/charts/link`              | `link`                                                                                                                                                                         |
 | `@tanstack/charts/mark/scale-values` | `createMarkWithScaleValues`                                                                                                                                                    |
 | `@tanstack/charts/polar`             | `polar`, radial arc/line/area/dot marks, and radial/angle guides                                                                                                               |
+| `@tanstack/charts/portable`          | Compatibility alias for `@tanstack/charts/universal`                                                                                                                           |
 | `@tanstack/charts/universal`         | Common root authoring, runtime, scene, and static SVG values without browser hosts or adapters                                                                                 |
 | `@tanstack/charts/reconcile`         | `reconcileChartSvg`                                                                                                                                                            |
 | `@tanstack/charts/rect`              | `rect`, `cell`                                                                                                                                                                 |
diff --git a/packages/charts-core/docs/comparison.md b/packages/charts-core/docs/comparison.md
index 5d640ed7..befd070e 100644
--- a/packages/charts-core/docs/comparison.md
+++ b/packages/charts-core/docs/comparison.md
@@ -4,7 +4,7 @@ description: Compare current TanStack Charts workspace source with pinned Chart.
 ---
 
 TanStack Charts `0.3.1` is a pre-alpha release. Its results on this page measure
-the exact workspace source included in this release and pinned competitor
+the exact current workspace revision recorded below and pinned competitor
 packages. This comparison records architectural differences and reproducible
 evidence without turning untested behavior into a checkmark.
 
@@ -12,14 +12,14 @@ evidence without turning untested behavior into a checkmark.
 
 | Library                                                                                | Package              | Measured source     |
 | -------------------------------------------------------------------------------------- | -------------------- | ------------------- |
-| [TanStack Charts](./overview.md)                                                       | `@tanstack/charts`   | workspace `c422a2c` |
+| [TanStack Charts](./overview.md)                                                       | `@tanstack/charts`   | workspace `43ae5f3` |
 | [Chart.js](https://www.chartjs.org/docs/latest/)                                       | `chart.js`           | npm `4.5.1`         |
 | [Apache ECharts](https://echarts.apache.org/handbook/en/best-practices/canvas-vs-svg/) | `echarts`            | npm `6.1.0`         |
 | [Recharts](https://recharts.github.io/en-US/)                                          | `recharts`           | npm `3.10.1`        |
 | [Observable Plot](https://observablehq.com/plot/features/plots)                        | `@observablehq/plot` | npm `0.6.17`        |
 
 The competitor versions are exact package pins, not latest versions inferred
-at page render time. The measured TanStack workspace revision is `c422a2c`.
+at page render time. The measured TanStack workspace revision is `43ae5f3`.
 
 ## Capability matrix
 
@@ -111,7 +111,8 @@ Canvas composition while keeping D3 and state ownership explicit.
 ## Evidence and reproduction
 
 - [Standard comparison protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/README.md)
-- [Tracked bundle baseline](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/bundle-baseline.json)
+- [Tracked current bundle baseline](https://github.com/TanStack/charts/blob/main/benchmarks/comparison/bundle-baseline.json)
+- [Tagged release bundle baseline](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/bundle-baseline.json)
 - [Stress protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/comparison/stress/README.md)
 - [Catalog conformance protocol](https://github.com/TanStack/charts/blob/v0.3.1/benchmarks/conformance/README.md)
 
diff --git a/packages/charts-core/docs/installation.md b/packages/charts-core/docs/installation.md
index fb3e61a4..0b07036d 100644
--- a/packages/charts-core/docs/installation.md
+++ b/packages/charts-core/docs/installation.md
@@ -168,8 +168,11 @@ import {
 import type { ChartDefinition } from '@tanstack/charts/types'
 ```
 
-The root remains the browser-oriented compatibility entry. Subpaths expose the
-same contracts behind explicit capability boundaries.
+The root remains the primary browser-oriented entry. Subpaths expose the same
+contracts behind explicit capability boundaries.
+
+`@tanstack/charts/portable` remains a compatibility alias for existing
+consumers. New environment-neutral code should use `/universal`.
 
 Optional capabilities have explicit entries:
 
diff --git a/packages/charts-core/docs/reference/index.md b/packages/charts-core/docs/reference/index.md
index 32d9f78a..95c563a0 100644
--- a/packages/charts-core/docs/reference/index.md
+++ b/packages/charts-core/docs/reference/index.md
@@ -90,6 +90,7 @@ capabilities and individual marks independently tree-shakeable.
 | `@tanstack/charts/link`              | `link`                                                                                                                                                                         |
 | `@tanstack/charts/mark/scale-values` | `createMarkWithScaleValues`                                                                                                                                                    |
 | `@tanstack/charts/polar`             | `polar`, radial arc/line/area/dot marks, and radial/angle guides                                                                                                               |
+| `@tanstack/charts/portable`          | Compatibility alias for `@tanstack/charts/universal`                                                                                                                           |
 | `@tanstack/charts/universal`         | Common root authoring, runtime, scene, and static SVG values without browser hosts or adapters                                                                                 |
 | `@tanstack/charts/reconcile`         | `reconcileChartSvg`                                                                                                                                                            |
 | `@tanstack/charts/rect`              | `rect`, `cell`                                                                                                                                                                 |
diff --git a/packages/charts-core/package.json b/packages/charts-core/package.json
index 2c27ea6b..da857d88 100644
--- a/packages/charts-core/package.json
+++ b/packages/charts-core/package.json
@@ -57,6 +57,7 @@
     "./link": "./src/link.ts",
     "./mark/scale-values": "./src/mark-with-scale-values.ts",
     "./polar": "./src/polar.ts",
+    "./portable": "./src/portable.ts",
     "./universal": "./src/universal.ts",
     "./reconcile": "./src/reconcile.ts",
     "./rect": "./src/rect.ts",
@@ -199,6 +200,10 @@
         "types": "./dist/polar.d.ts",
         "import": "./dist/polar.js"
       },
+      "./portable": {
+        "types": "./dist/portable.d.ts",
+        "import": "./dist/portable.js"
+      },
       "./universal": {
         "types": "./dist/universal.d.ts",
         "import": "./dist/universal.js"
diff --git a/packages/charts-core/src/exports.test.ts b/packages/charts-core/src/exports.test.ts
index c99e2ee7..bd9f1c21 100644
--- a/packages/charts-core/src/exports.test.ts
+++ b/packages/charts-core/src/exports.test.ts
@@ -24,9 +24,10 @@ describe('public package exports', () => {
     ).toBe(true)
   })
 
-  it('keeps the universal barrel aligned with root authoring exports', async () => {
-    const [root, universal] = await Promise.all([
+  it('keeps the environment-safe barrels aligned with root authoring exports', async () => {
+    const [root, portable, universal] = await Promise.all([
       import('@tanstack/charts'),
+      import('@tanstack/charts/portable'),
       import('@tanstack/charts/universal'),
     ])
     const browserOnlyRootValues = new Set([
@@ -41,6 +42,7 @@ describe('public package exports', () => {
         .filter((name) => !browserOnlyRootValues.has(name))
         .sort(),
     )
+    expect(Object.keys(portable).sort()).toEqual(Object.keys(universal).sort())
   })
 
   it('keeps tooltip capabilities on exact subpaths', async () => {
diff --git a/packages/charts-core/src/portable.ts b/packages/charts-core/src/portable.ts
new file mode 100644
index 00000000..93fe9362
--- /dev/null
+++ b/packages/charts-core/src/portable.ts
@@ -0,0 +1 @@
+export * from './universal'
diff --git a/scripts/check-packed-consumers.mjs b/scripts/check-packed-consumers.mjs
index 62c084f3..bba436c7 100644
--- a/scripts/check-packed-consumers.mjs
+++ b/scripts/check-packed-consumers.mjs
@@ -1119,6 +1119,7 @@ async function verifyDeclarations() {
       type ChartPoint,
       type ChartTooltipOptions,
     } from '@tanstack/charts/universal'
+    import { defineChart as definePortableChart } from '@tanstack/charts/portable'
     import type {
       ChartDefinition,
       ChartScene,
@@ -1159,7 +1160,7 @@ async function verifyDeclarations() {
       id: 'host-tooltip-portal',
       create: () => undefined,
     }
-    void [point, tooltip, tooltipToken, portalToken]
+    void [point, tooltip, tooltipToken, portalToken, definePortableChart]
   `
   const universalContractPath = resolve(
     fixtureDirectory,