Feat: Adopt TypeScript Template Literals for Custom Evaluator Prompts #56
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…t templates Add TypeScript/JavaScript support for custom evaluator prompts using the same subprocess pattern as code judges. Changes: - Add PromptTemplateInputSchema and definePromptTemplate to @agentv/eval - Update orchestrator to execute .ts/.js prompt files as subprocesses - Add config and resolvedPromptPath to LlmJudgeEvaluatorConfig - Skip validation for executable prompt templates in evaluator parser - Add unit tests for PromptTemplateInputSchema - Add integration tests for executable prompt templates - Add example in examples/features/prompt-template-sdk/ Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Move OpenSpec to archive after implementation is complete. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Archive change to openspec/changes/archive/2026-01-28-adopt-ts-template-prompts/ - Create new spec openspec/specs/custom-evaluator-prompts/ Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Reuse CodeJudgeInputSchema for PromptTemplateInputSchema (consistent payloads) - Add timeout support to executePromptTemplate (prevents hanging scripts) - Validate non-empty output from prompt templates - Throw error for missing .ts/.js prompt template files (fail-fast) - Update tests to reflect required fields Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
…lates
Change executable prompt templates to use explicit script arrays instead
of auto-detecting runtime by file extension. This matches the code_judge
pattern for consistency.
Before:
prompt: ../prompts/custom-evaluator.ts # ambiguous runtime
After:
prompt:
script: [bun, run, ../prompts/custom-evaluator.ts]
config: { ... }
Benefits:
- Consistent with code_judge pattern (one mental model)
- No ambiguity about runtime (user explicitly specifies bun/node/python)
- Future-proof (works with any runtime without code changes)
- Aligns with "Built-ins for Primitives Only" design principle
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Maintains backward compatibility for users who were using --eval-id. Shows deprecation warning when used. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Reverts to --eval-id as the primary flag for filtering eval cases. This aligns with Jest/Vitest convention (--testNamePattern) where the flag name describes what is being filtered, not the action. Removes --filter alias to keep the CLI simple and match existing docs. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Document the new definePromptTemplate SDK for creating dynamic LLM judge prompts with TypeScript. Includes YAML configuration example and available context fields. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Add
definePromptTemplateSDK wrapper to@agentv/evalthat mirrorsdefineCodeJudge. Update orchestrator to execute .ts/.js prompt files as subprocesses.Changes
SDK (
@agentv/eval):PromptTemplateInputSchemainpackages/eval/src/schemas.tsdefinePromptTemplatewrapper inpackages/eval/src/prompt-template.tsdefinePromptTemplate,PromptTemplateInput,PromptTemplateInputSchema,PromptTemplateHandlerCore (
@agentv/core):LlmJudgeEvaluatorConfigto includeconfigandresolvedPromptPathexecutePromptTemplatefunction inorchestrator.tsresolveCustomPromptto detect and execute.ts/.jsfilesTesting:
PromptTemplateInputSchema(14 tests)Example:
examples/features/prompt-template-sdk/with TypeScript prompt template exampleTest plan
bun run buildpassesbun run typecheckpassesbun run lintpassesbun testpasses (369 tests)🤖 Generated with Claude Code