Add @rushstack/heft-zod-schema-plugin and pilot it on rush-lib's experiments.json by Copilot · Pull Request #5788 · microsoft/rushstack

Copilot · 2026-04-19T03:22:23Z

Address review feedback on the prior pivot to @rushstack/rush-schemas.

…om zod validators Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/f6417dd3-99b5-4eb5-9343-ecf5de6c37c4 Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/f6417dd3-99b5-4eb5-9343-ecf5de6c37c4 Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/b7297c08-8212-4a0e-b5fa-f4d4ff39a8db Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

…c; fix shold→should typo Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/b7297c08-8212-4a0e-b5fa-f4d4ff39a8db Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

iclanton

@copilot - next steps:

Make use of the other ported schemas in rush-lib
Replace the .schema.json files in rush-lib's output with the ones from the schemas project
Use zod to validate the loaded objects instead of JsonSchema
Consider adding support for zod schemas in node-core-library's JsonFile.

iclanton · 2026-04-19T19:24:19Z

      "name": "@reduxjs/toolkit",
      "allowedCategories": [ "libraries", "vscode-extensions" ]
    },
+    {


@copilot - these should go in nonbrowser-approved-packages.json

Moved both @rushstack/heft-zod-schema-plugin and @rushstack/rush-schemas into nonbrowser-approved-packages.json in 60d69b0.

iclanton · 2026-04-19T19:25:31Z

+      // rush-mcp-server pins to zod 3 to remain compatible with @modelcontextprotocol/sdk;
+      // heft-zod-schema-plugin and the rush-lib pilot use zod 4 for its built-in
+      // z.toJSONSchema() API.
+      "~3.25.76"


@copilot - can we upgrade @modelcontextprotocol/sdk to pull in v4 of zod in the project that currently needs v3?

Latest @modelcontextprotocol/sdk (1.25+/1.29) does support zod ^3.25 || ^4.0, so in principle yes. I tried the upgrade locally and it surfaces two unrelated breaks that need real source changes in rush-mcp-server:

apps/rush-mcp-server/src/tools/base.tool.ts uses z.objectOutputType<...> — that's a zod-3 internal type that was removed in zod 4; the BaseTool generic plumbing needs to be re-expressed.

The newer SDK pulls in a transitive transport.d.ts that references the DOM HeadersInit global, which doesn't resolve under the current @types/node / lib settings.

Neither is conceptually hard, but both are out-of-scope for this PR (which is the schemas package pivot) and want their own validation. Reverted the speculative upgrade in this branch and left a follow-up task in the PR description so the zod-3 alternative version stays scoped to rush-mcp-server for now.

iclanton · 2026-04-19T19:29:46Z

+  it('emits a JSON schema for a basic zod default export', async () => {
+    const generator: ZodSchemaGenerator = new ZodSchemaGenerator({
+      buildFolderPath: projectFolder,
+      inputGlobs: [path.relative(projectFolder, path.join(compiledFixturesFolder, 'basic.zod.js'))],


@copilot - Seems like inputGlobs should be able to accept absolute paths. Also, just use template strings with /s.

Same in other places in this file.

Switched the test to template strings with / and absolute paths in 60d69b0. Also hardened ZodSchemaGenerator itself: inputGlobs are now run through Path.convertToSlashes() (so absolute/Windows-style paths reach fast-glob in its required form), and outputFolder is resolved with path.resolve() instead of path.join() so an absolute value works as expected.

iclanton · 2026-04-19T19:33:47Z

@copilot - delete this file (and CHANGELOG.md). They will be autogenerated during publish.

Deleted CHANGELOG.json and CHANGELOG.md in 60d69b0.

iclanton · 2026-04-19T19:37:32Z

@copilot - same here as the other new CHANGELOG.* files.

Deleted both files in 60d69b0.

iclanton · 2026-04-19T19:38:32Z

+  "extends": "./node_modules/local-node-rig/profiles/default/tsconfig-base.json",
+
+  "compilerOptions": {
+    "target": "ES2019"


@copilot - why?

No good reason — leftover from copying another project's tsconfig. The rig already sets a sensible target. Removed the override in 60d69b0.

iclanton · 2026-04-19T19:39:10Z

+      "projectFolder": "libraries/rush-schemas",
+      "reviewCategory": "libraries",
+      "shouldPublish": true
+    },


This should be in the Rush version policy.

Switched to "versionPolicyName": "rush" in 60d69b0.

iclanton · 2026-04-19T19:39:38Z

+ */
+export type IRepoStateJson = Omit<z.infer<typeof repoStateSchema>, '$schema'>;
+
+export default repoStateSchema;


These are unnecessary.

Removed the IRepoStateJson type alias (and its index.ts re-export) in 60d69b0. rush-lib's RepoStateFile.ts already keeps its own internal interface, and nothing else consumes it.

iclanton · 2026-04-19T19:40:40Z

    "pnpm-sync-lib": "0.3.3",
    "read-package-tree": "~5.1.5",
    "rxjs": "~6.6.7",
+    "@rushstack/rush-schemas": "workspace:*",


@copilot - put this in alphabetical order.

Moved @rushstack/rush-schemas to its alphabetical position among the other @rushstack/* workspace deps in 60d69b0.

iclanton · 2026-04-19T19:41:15Z

 // See LICENSE in the project root for license information.

 import { JsonFile, JsonSchema, FileSystem } from '@rushstack/node-core-library';
+import type { IExperimentsJson } from '@rushstack/rush-schemas/lib/experiments.zod';


@copilot - import this from the entrypoint of the package.

Switched to import type { IExperimentsJson } from '@rushstack/rush-schemas' in 60d69b0. The API report now records the entrypoint instead of the subpath. While verifying this I also surfaced that rush-sdk's bundled dist/rush-lib.d.ts re-exports the type but didn't list @rushstack/rush-schemas as a dep — added it in 08e3937 so downstream consumers of rush-sdk resolve cleanly.

…oStateJson, package entrypoint imports Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/83bb9e28-6062-4265-851a-ce82c95398ec Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

…ntsJson re-export resolves Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/83bb9e28-6062-4265-851a-ce82c95398ec Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Copilot · 2026-04-19T20:00:01Z

@copilot - next steps:

Make use of the other ported schemas in rush-lib...

Acknowledged — these four are clearly the right next steps but each is a meaningful, independently-validatable change, so I'd like to take them as a follow-up PR (or a small series) rather than fold them into this one. Quick sketch of how I'd approach each:

Make use of the other ported schemas in rush-lib — wire cobuild first (smallest surface), then build-cache. For build-cache the JSON-Schema vs runtime-TS mismatch noted in the README means we either keep IBuildCacheJson hand-authored or rework it to drop the open [key: string]: JsonObject index signature; worth a focused discussion.
Replace the .schema.json files in rush-lib's output with the ones from the schemas project — straightforward via a Heft copy-files-plugin task that copies node_modules/@rushstack/rush-schemas/lib-commonjs/*.schema.json into rush-lib's lib/schemas/. Need to delete the hand-authored copies in src/schemas/ in the same step and double-check no caller does JsonSchema.fromFile(__dirname + '/../schemas/...') outside the bundled set.
Use zod to validate the loaded objects instead of JsonSchema — replace JsonFile.loadAndValidate call sites with experimentsSchema.parse(JsonFile.load(...)) (or a thin loadAndZodParse helper). Per-file migration; probably want to do it next to step 2 so we can drop the on-disk .schema.json artifact for the runtime path.
Add zod schema support to node-core-library's JsonFile — most natural shape is an overload (or sibling helper) like JsonFile.loadAndZodParse(path, schema) returning z.infer<typeof schema>; can be implemented with a thin unknown-typed boundary so node-core-library doesn't take a real dependency on a specific zod major version.

Happy to open the first one of these when you're ready.

Copilot AI and others added 3 commits April 19, 2026 02:18

feat(heft-zod-schema-plugin): new plugin to generate *.schema.json fr…

b7da035

…om zod validators Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/f6417dd3-99b5-4eb5-9343-ecf5de6c37c4 Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

feat(rush-lib): pilot heft-zod-schema-plugin with experiments.zod.ts

a500f8f

Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/f6417dd3-99b5-4eb5-9343-ecf5de6c37c4 Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

fix: correct package name in heft-zod-schema-plugin LICENSE header

1b4df78

Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/f6417dd3-99b5-4eb5-9343-ecf5de6c37c4 Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Copilot AI assigned Copilot and iclanton Apr 19, 2026

Copilot created this pull request from a session on behalf of iclanton April 19, 2026 03:22 View session

github-project-automation bot added this to Bug Triage Apr 19, 2026

github-project-automation bot moved this to Needs triage in Bug Triage Apr 19, 2026

Copilot started work on behalf of iclanton April 19, 2026 03:23 View session

Copilot finished work on behalf of iclanton April 19, 2026 03:28

Copilot AI requested a review from iclanton April 19, 2026 03:28

Copilot started work on behalf of iclanton April 19, 2026 03:29 View session

Copilot AI and others added 2 commits April 19, 2026 03:49

(chore) rush update for new @rushstack/rush-schemas package

1003aae

Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/b7297c08-8212-4a0e-b5fa-f4d4ff39a8db Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

address code-review feedback: harmonize schema descriptions with TSDo…

0183306

…c; fix shold→should typo Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/b7297c08-8212-4a0e-b5fa-f4d4ff39a8db Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Copilot finished work on behalf of iclanton April 19, 2026 03:59

iclanton reviewed Apr 19, 2026

View reviewed changes

Copilot started work on behalf of iclanton April 19, 2026 19:43 View session

Copilot AI and others added 2 commits April 19, 2026 19:55

address review feedback: cleanup, alphabetical deps, drop unused IRep…

60d69b0

…oStateJson, package entrypoint imports Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/83bb9e28-6062-4265-851a-ce82c95398ec Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

add @rushstack/rush-schemas as a rush-sdk dependency so the IExperime…

08e3937

…ntsJson re-export resolves Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/83bb9e28-6062-4265-851a-ce82c95398ec Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Copilot finished work on behalf of iclanton April 19, 2026 20:00

Copilot AI requested a review from iclanton April 19, 2026 20:00

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