fix: emit ValidationError instead of UnknownError in create telemetry

[Hweinstock]

Description

When the create command fails validation (e.g. missing --framework, --model-provider, --memory), telemetry emits error_name: "UnknownError" instead of error_name: "ValidationError".

Two root causes:

1. Plain Error thrown instead of ValidationError — command.tsx throws new Error(validation.error). The classifyError function only recognizes BaseError subclasses via instanceof, so a plain Error gets { category: "UnknownError", source: "unknown" }.

2. minify: true without keepNames mangles class names — BaseError sets this.name = this.constructor.name. With minification, constructor names are mangled (e.g. "Gr"), so ErrorName.safeParse(err.name) fails for all error subclasses. Per esbuild docs:

   However, minification renames symbols to reduce code size [...] That changes value of the name property for many of these cases. [...] some frameworks rely on the name property for registration and binding purposes. If this is the case, you can enable this option to preserve the original name values even in minified code.

Fix

• src/cli/commands/create/command.tsx — throw new ValidationError(...) instead of new Error(...)
• esbuild.config.mjs — add keepNames: true to preserve class names through minification
• integ-tests/create-edge-cases.test.ts — assert error_name: "ValidationError" and error_source: "user"

Related Issue

Closes #

Type of Change

• Bug fix

Testing

• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[github-actions]

Package Tarball

aws-agentcore-0.14.2.tgz

How to install

gh release download pr-1342-tarball --repo aws/agentcore-cli --pattern "*.tgz" --dir /tmp/pr-tarball
npm install -g /tmp/pr-tarball/aws-agentcore-0.14.2.tgz

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-cli-automation]

The fix correctly identifies both root causes (plain Error vs ValidationError, and minification mangling class names), and keepNames: true is the right global fix that benefits every BaseError subclass.

One concern about completeness: the same throw new Error(validation.error) pattern exists in five other CLI command handlers, all inside runCliCommand blocks where the error feeds directly into classifyError. After this PR they will all still emit error_name: "UnknownError" for validation failures. See the inline comment for details.

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)