chore: add Evalite for optional LLM and task evals by ieduardogf · Pull Request #1538 · Telefonica/mistica-web

ieduardogf · 2026-04-21T16:26:18Z

Summary

Adds Evalite (evalite@beta) and Vitest as dev dependencies so we can run scored evaluations (tasks, prompts, or LLM outputs) with a local UI and trace storage.

This PR introduces the plumbing only (dependencies, scripts, sample eval, README). Follow-up PRs are expected to add new eval suites by dropping additional *.eval.ts files under evals/ (or extending existing ones), without further tooling changes.

How to use

Watch mode (development) — yarn eval:dev
Runs Evalite in watch mode, re-runs when eval files change, and serves the results UI (default http://localhost:3006 per Evalite docs).
Single run (e.g. CI or quick check) — yarn eval
Runs all evals once and exits with a non-zero status if scores are below the threshold.
Authoring — Add or edit files matching evals/**/*.eval.ts. See evals/my-eval.eval.ts for a minimal example using evalite() and deterministic scorers.
Scorers — For string-only scorers (e.g. exactMatch), import from evalite/scorers/deterministic. The main evalite/scorers entry pulls in LLM-judge scorers that need the optional ai peer dependency.

Docs

README Development section lists the new scripts and links the Evalite quickstart.

Ref: N/A

Add evalite@beta, vitest, yarn scripts, sample eval under evals/, and README notes. Made-with: Cursor

github-actions · 2026-04-21T16:29:17Z

Size stats

	master	this branch	diff
Total JS	16.1 MB	16.1 MB	0 B
JS without icons	2.01 MB	2.01 MB	0 B
Lib overhead	92.5 kB	92.5 kB	0 B
Lib overhead (gzip)	19.9 kB	19.9 kB	0 B

github-actions · 2026-04-21T16:32:03Z

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github-actions · 2026-04-21T16:35:28Z

Accessibility report
✔️ No issues found

ℹ️ You can run this locally by executing yarn audit-accessibility.

The evals/ directory imports from evalite subpath exports (e.g. evalite/scorers/deterministic) which require a modern moduleResolution. Excluding evals/ from tsconfig.production.json prevents gen-ts-defs from trying to compile dev-only eval files during the library build. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

github-actions · 2026-04-21T20:13:40Z

Screenshot tests report

✔️ All passing

Marcosld · 2026-04-22T07:13:41Z

+import {evalite} from 'evalite';
+import {exactMatch} from 'evalite/scorers/deterministic';
+
+evalite('My Eval', {


I thought we were going to test this lib against its competitors before pushing a installation+configuration to the repo. I mean, there are other options that could potentially be better, perhaps we should test them before commiting (?)

Yes I think we should test different tools

Copilot

Pull request overview

Adds Evalite-based evaluation tooling (plus Vitest dependency) to the repo so developers can author and run local/CI-friendly scored eval suites under evals/, with minimal initial scaffolding.

Changes:

Add evalite (beta) and vitest dev dependencies plus yarn eval / yarn eval:dev scripts.
Introduce a minimal example eval file under evals/ and document the workflow in the README.
Exclude evals/ from the production TS declaration build config and vendor new Yarn cache artifacts.

Reviewed changes

Copilot reviewed 4 out of 123 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tsconfig.production.json	Excludes `evals/` from the production declaration emit config.
package.json	Adds Evalite/Vitest dev deps and new `eval` scripts.
evals/my-eval.eval.ts	Adds a minimal example Evalite suite using deterministic scoring.
README.md	Documents how to run/author evals and notes scorer import guidance.
.yarn/cache/why-is-node-running-npm-2.3.0-011cf61a18-58ebbf406e.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/token-types-npm-6.1.2-1f6e70d865-ddade9c99f.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/tinyrainbow-npm-3.1.0-35ba47f8ae-dbb16b4aa5.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/stream-shift-npm-1.0.3-c1c29210c7-a24c0a3f66.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/stackback-npm-0.0.2-73273dc92e-2d4dc4e64e.zip	Yarn offline cache update (transitive dependency).
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.yarn/cache/siginfo-npm-2.0.0-9bbac931f8-8aa5a98640.zip	Yarn offline cache update (transitive dependency).
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.yarn/cache/quick-format-unescaped-npm-4.0.4-7e22c9b7dc-7bc32b9935.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/on-exit-leak-free-npm-2.1.2-0d0c5ad67d-6ce7acdc7b.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/lodash.truncate-npm-4.4.2-bc50fe1663-b463d8a382.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/js-levenshtein-npm-1.1.6-ab883e61a3-409f052a7f.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/is-stream-npm-4.0.1-328fd196cc-cbea3f1fc2.zip	Yarn offline cache update (transitive dependency).
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.yarn/cache/fast-querystring-npm-1.1.2-81dfb4019b-7149f82ee9.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/fast-decode-uri-component-npm-1.0.1-578ba9fecf-427a48fe09.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/duplexify-npm-4.1.3-f0053971e9-9636a02734.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/atomic-sleep-npm-1.0.0-17d8a762a3-b95275afb2.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/abstract-logging-npm-2.0.1-b805b8edfa-6967d15e5a.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/@standard-schema-spec-npm-1.1.0-d3e5ccd2e2-6245ebef5e.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/@lukeed-ms-npm-2.0.2-5e69b6e173-6ae47ed3eb.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/@fastify-forwarded-npm-3.0.1-03d48a4e5e-2cde644dc3.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/@fastify-accept-negotiator-npm-2.0.1-d797505dde-7a2db0bb9f.zip	Yarn offline cache update (transitive dependency).
.yarn/cache/@borewit-text-codec-npm-0.2.2-11871252cc-7b4852c38b.zip	Yarn offline cache update (transitive dependency).

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Copilot · 2026-04-22T11:39:15Z

+- `yarn eval:dev` / `yarn eval`: [Evalite](https://v1.evalite.dev/guides/quickstart/) for task/LLM evals in
+  `evals/*.eval.ts` (use `evalite/scorers/deterministic` for scorers like `exactMatch` unless you add the `ai`
+  package for LLM-judge scorers from `evalite/scorers`)


README says eval files live in evals/*.eval.ts, but the PR description and intended workflow mention evals/**/*.eval.ts (and follow-up suites likely want nested folders). Suggest updating the README glob/path wording to match the intended recursive pattern (or adjust the tooling expectation if it’s actually non-recursive).

Copilot

Pull request overview

Copilot reviewed 4 out of 123 changed files in this pull request and generated no new comments.

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atabel · 2026-04-24T06:56:16Z

        "vite-plugin-entry-shaking": "^0.5.1",
-        "vite-plugin-no-bundle": "^4.0.0"
+        "vite-plugin-no-bundle": "^4.0.0",
+        "vitest": "^4.1.5"


we may not need vitest, can't we run evalite with jest_

atabel · 2026-04-24T06:58:46Z

maybe we should follow a file convention more consistent with the one we use for tests/stories (-eval.ts instead of .eval.ts)

atabel · 2026-04-24T06:59:24Z

+import {evalite} from 'evalite';
+import {exactMatch} from 'evalite/scorers/deterministic';
+
+evalite('My Eval', {


Yes I think we should test different tools

atabel · 2026-04-24T07:00:40Z

+        "eval:dev": "evalite watch",
+        "eval": "evalite"


I think we only need one eval script, If you want to run it with watch you can just run yarn eval watch

atabel · 2026-04-24T07:01:03Z

        "eslint": "^8.57.0",
        "eslint-plugin-mistica-local-rules": "workspace:*",
        "eslint-plugin-storybook": "^10.2.8",
+        "evalite": "beta",


there isn't an stable release yet?

I got confused by this too. They have a stable version but it is kinda stale and they are working actively in their beta 1.0 version. anyways the beta is quite old too (2 months)

Marcosld · 2026-04-23T07:21:08Z

-        "examples"
+        "examples",
+        "evals"
    ]


You should probably exclude evals folder from the published mistica code too

Marcosld · 2026-04-24T12:49:08Z

        "eslint": "^8.57.0",
        "eslint-plugin-mistica-local-rules": "workspace:*",
        "eslint-plugin-storybook": "^10.2.8",
+        "evalite": "beta",


I got confused by this too. They have a stable version but it is kinda stale and they are working actively in their beta 1.0 version. anyways the beta is quite old too (2 months)

chore: add Evalite for optional LLM and task evals

ac45995

Add evalite@beta, vitest, yarn scripts, sample eval under evals/, and README notes. Made-with: Cursor

ieduardogf added the AI AI Generated label Apr 21, 2026

ieduardogf requested review from Marcosld, atabel, aweell and yceballost and removed request for aweell April 21, 2026 16:26

ieduardogf added the Mistica Intelligence label Apr 21, 2026

Marcosld reviewed Apr 22, 2026

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ieduardogf requested review from Copilot April 22, 2026 11:34

Copilot started reviewing on behalf of ieduardogf April 22, 2026 11:35 View session

Copilot AI reviewed Apr 22, 2026

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ieduardogf marked this pull request as draft April 23, 2026 08:17

atabel reviewed Apr 24, 2026

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Marcosld reviewed Apr 24, 2026

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ieduardogf commented Apr 21, 2026

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