vitejs/vite `d9ed8574..a100b324`

base and head as given

SSR module fetching now runs through the SSR development environment.
SSR environments now adjust source maps for asynchronous module evaluation.
Module runners now expose a remote module-fetch transport.
Development environments now expose a remote module-fetch transport.

files changed: 17
in a component: 14
lines in components: 298
components: 7
public routes changed: 0
schema statements: 0
new dependencies: 0
excluded by role: 3

Where to focus your review

Check callers of removed or renamed exports5 components with export changes. Check compatibility and intended visibility.
Verify behavior in dependent codeFollow the import paths below and exercise the consumers they reach.
Inspect the paths tracing stopped at5 changed symbols stopped at heavily imported files. Inspect their consumers separately.

Based on 12 of 14 eligible changed files

Environment-owned SSR loading

Modified

Before: The server owned SSR module fetching
After: SSR environments own module fetching

SSR module runners fetch through their environment, while the default SSR environment applies the source-map line offset needed for asynchronous evaluation. Existing server loading continues to create runners from the SSR environment.

In favour

In favour: Keeps SSR source-map adjustment with its execution environment

The model found nothing to weigh against this.

Inspect 7 source files behind this explanation

Remote module-fetch transport

Added

Before: did not exist
After: Runners request remote module fetches

A module runner can request module data through a message-based transport, and a development environment can answer fetch requests over its own message interface. Both transport APIs are publicly available.

In favour

In favour: Timed-out remote requests are removed from pending request tracking

Against

Against: Separate envelopes require adapters to connect the two transports

Inspect 5 source files behind this explanation

Files changed in 7 components (6 shown). Dependencies shown: 1 new, 12 unchanged

unchanged · 12new · 1

1 new dependency between components — Server Code → SSR Runtime

What else could behave differently

11 components · 91 files

These components import changed code, directly or through other files. A traced dependency is a place to review, not a confirmed runtime failure. Some paths stopped at heavily imported files; inspect those consumers separately.

Reached 3

Component	Symbol	Cited at	Files	Reached by
SSR Codepackages/vite/src/node/ssr/	Signature changed `DevEnvironment`1 of 12 changed symbols reaching it	packages/vite/src/node/server/environment.ts:19-92	7	2 direct · 3 at two steps · 2 at three steps Trace path Shortest component path from the changed symbol: Server Code SSR Code Later steps follow file imports; they do not prove this symbol is called.
packages/plugin-legacy/src/	Signature changed `DevEnvironment`1 of 11 changed symbols reaching it	packages/vite/src/node/server/environment.ts:19-92	1	none direct · 1 at two steps Trace path Shortest component path from the changed symbol: Server Code Node Core packages/plugin-legacy/src/ Later steps follow file imports; they do not prove this symbol is called.
Node Corepackages/vite/src/node/	Signature changed `DevEnvironment`1 of 12 changed symbols reaching it	packages/vite/src/node/server/environment.ts:19-92	16	5 direct · 11 at two steps Trace path Shortest component path from the changed symbol: Server Code Node Core Later steps follow file imports; they do not prove this symbol is called.

Ranked lower 8

Component	Files	Reached by
packages/vite/src/module-runner/	7	4 direct · 2 at two steps · 1 at three steps
packages/vite/src/node/server/	14	7 direct · 6 at two steps · 1 at three steps
packages/vite/src/node/plugins/	28	6 direct · 22 at two steps
packages/vite/src/node/optimizer/	5	1 direct · 4 at two steps
packages/vite/src/module-runner/sourcemap/	2	2 direct
packages/vite/src/node/server/middlewares/	8	4 direct · 4 at two steps
packages/vite/src/node/ssr/runtime/	2	2 direct
packages/vite/src/node/server/environments/	1	1 direct

Not traced past a hub 5

Symbol	Hub file	Imported by
packages/vite/src/module-runner/runner.ts:ModuleRunner	packages/vite/src/node/server/index.ts	34
packages/vite/src/module-runner/runner.ts:ModuleRunner	packages/vite/src/node/index.ts	30
packages/vite/src/module-runner/runner.ts:ModuleRunner	packages/vite/src/node/config.ts	56
packages/vite/src/module-runner/runner.ts:ModuleRunner	packages/vite/src/node/plugin.ts	35
packages/vite/src/node/server/index.ts:_createServer	packages/vite/src/node/server/index.ts	34

Statements 3

DevEnvironment's signature changed and reached 7 files in SSR. 232

environment.ts:19-92

DevEnvironment's signature changed and reached 1 file in plugin legacy. 1

environment.ts:19-92

DevEnvironment's signature changed and reached 16 files in node core. 511

environment.ts:19-92

30 reached files belong to no component — tests, docs and config.

Routes, schema, dependencies

No public URL, no migration and no new package.

Inspect components, files and symbols

Component

SSR CodeModified

packages/vite/src/node/ssr/

2 files · 42 lines

exports, 3 dependents

SSR exports no longer included ssrFetchModule.

Environment-owned SSR loading, modified

SSR HTMLModified

playground/ssr-html/

2 files · 8 lines

Environment-owned SSR loading, modified

Node CoreModified

packages/vite/src/node/

1 file · 3 lines

6 dependents

Node exports added FetchResult and RemoteEnvironmentTransport.

Remote module-fetch transport, added

Module RunnerModified

packages/vite/src/module-runner/

4 files · 95 lines

5 dependents

Module runner exports added RemoteRunnerTransport and RunnerTransport.

Remote module-fetch transport, added

Server CodeModified

packages/vite/src/node/server/

3 files · 101 lines

7 dependents

Server exports added RemoteEnvironmentTransport.

Environment-owned SSR loading, modified

SSR RuntimeModified

packages/vite/src/node/ssr/runtime/

1 file · 26 lines

2 dependents

Environment-owned SSR loading, modified

Server EnvironmentsAdded

packages/vite/src/node/server/environments/

1 file · 23 lines

1 dependent

ranked lower · 0.04

Server environments exports added createSsrEnvironment.

Environment-owned SSR loading, modified

File

SSR Codepackages/vite/src/node/ssr/

fetchModule.ts

+13 −9

Environment-owned SSR loading, modified

SSR Codepackages/vite/src/node/ssr/

ssrFetchModule.ts

+0 −20

Environment-owned SSR loading, modified

SSR HTMLplayground/ssr-html/

test-network-imports.js

+4 −2

Environment-owned SSR loading, modified

SSR HTMLplayground/ssr-html/

test-stacktrace-runtime.js

+1 −1

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

index.ts

+25 −17

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

environmentTransport.ts

+38 −0

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

environment.ts

+20 −1

Environment-owned SSR loading, modified

SSR Runtimepackages/vite/src/node/ssr/runtime/

serverModuleRunner.ts

+17 −9

Environment-owned SSR loading, modified

Server Environmentspackages/vite/src/node/server/environments/

ssrEnvironment.ts

+23 −0

Environment-owned SSR loading, modified

Node Corepackages/vite/src/node/

index.ts

+2 −1

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

transport.ts

+84 −0

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

types.ts

+3 −4

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

index.ts

+2 −0

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

runner.ts

+1 −1

Remote module-fetch transport, added

Function

imports what changeddownstream of it, one mark per step

DevEnvironment()environment.ts

reaches 2 components

DevEnvironment's signature changed and reached 28 files in node plugins. 622

environment.ts:19-92

DevEnvironment's signature changed and reached 1 file in server environments. 1

environment.ts:19-92

Environment-owned SSR loading, modified

_createServer()index.ts

reaches nothing past a hub

The analysis declined to trace _createServer's body change at its own file because 34 files import it.

index.ts:446-1069

Environment-owned SSR loading, modified

ViteDevServer()index.ts

reaches 2 components

ViteDevServer's signature changed, affecting 2 of 18 names in its file, and reached 5 optimizer files. 14

index.ts:226-433

ViteDevServer's signature changed and reached 8 files in server middlewares. 44

index.ts:226-433

Environment-owned SSR loading, modified

ModuleRunner()runner.ts

reaches 8 components

ModuleRunner's body changed and reached 7 files in the module runner. 421

runner.ts:47-391

ModuleRunner's body changed and reached 14 files in server code. 761

runner.ts:47-391

ModuleRunner's body changed and reached 2 files in module-runner sourcemap. 2

runner.ts:47-391

ModuleRunner's body changed and reached 2 files in SSR runtime. 2

runner.ts:47-391

The analysis declined to trace ModuleRunner's body change through server/index.ts at hop 1 because 34 files import it.

runner.ts:47-391

The analysis declined to trace ModuleRunner's body change through node/index.ts at hop 2 because 30 files import it.

runner.ts:47-391

The analysis declined to trace ModuleRunner's body change through config.ts at hop 3 because 56 files import it.

runner.ts:47-391

The analysis declined to trace ModuleRunner's body change through plugin.ts at hop 3 because 35 files import it.

runner.ts:47-391

Remote module-fetch transport, added

Diff

SSR Codepackages/vite/src/node/ssr/

fetchModule.ts

2–3, 6–6, 13–13 and 7 more spans

Environment-owned SSR loading, modified

SSR Codepackages/vite/src/node/ssr/

ssrFetchModule.ts

1–20

Environment-owned SSR loading, modified

SSR HTMLplayground/ssr-html/

test-network-imports.js

15–18

Environment-owned SSR loading, modified

SSR HTMLplayground/ssr-html/

test-stacktrace-runtime.js

16–16

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

index.ts

19–19, 54–54, 96–96 and 11 more spans

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

environmentTransport.ts

1–38

Environment-owned SSR loading, modified

Server Codepackages/vite/src/node/server/

environment.ts

1–1, 8–9, 16–16 and 5 more spans

Environment-owned SSR loading, modified

SSR Runtimepackages/vite/src/node/ssr/runtime/

serverModuleRunner.ts

5–5, 12–15, 22–25 and 3 more spans

Environment-owned SSR loading, modified

Server Environmentspackages/vite/src/node/server/environments/

ssrEnvironment.ts

1–23

Environment-owned SSR loading, modified

Node Corepackages/vite/src/node/

index.ts

121–121, 137–137

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

transport.ts

1–84

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

types.ts

18–18, 127–127, 129–129

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

index.ts

6–6, 8–8

Remote module-fetch transport, added

Module Runnerpackages/vite/src/module-runner/

runner.ts

257–257

Remote module-fetch transport, added

Analysis scope

1989 → 7

1,989
files at head
389
components
7
changed by this change
6
shown above of 7

Where the new files landed

3 new files

New file	Belongs to	Used by	Calls	Serves
packages/vite/src/module-runner/transport.ts	Module Runnerbase frame	its own component only	nothing outside its own component	—
packages/vite/src/node/server/environmentTransport.ts	Server Codebase frame	Node Core	nothing outside its own component	—
packages/vite/src/node/server/environments/ssrEnvironment.ts	Server Environmentsnew territory	Server Code	Server Codepackages/vite/src/shared/	—

7components changed

5reached, not changed

1components added/removed

4dependencies added between components

1dependencies removed between components

0files moved to another path

17 files changed, 28 claims stated. 11 components reached in total.