refactor(core): centralize case conversion boundary

apps/cli/src/commands/compare/index.ts

@@ -11,7 +11,7 @@ import {
   string,
 } from 'cmd-ts';
 
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
+import { toSnakeCaseDeep } from '@agentv/core';
 import { loadLightweightResults, resolveResultSourcePath } from '../results/manifest.js';
 
 // ANSI color codes (no dependency needed)

apps/cli/src/commands/eval/jsonl-writer.ts

@@ -2,10 +2,9 @@ import { createWriteStream } from 'node:fs';
 import { mkdir } from 'node:fs/promises';
 import path from 'node:path';
 import { finished } from 'node:stream/promises';
+import { type EvaluationResult, serializeEvaluationResultWire } from '@agentv/core';
 import { Mutex } from 'async-mutex';
 
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
-
 export class JsonlWriter {
   private readonly stream: ReturnType<typeof createWriteStream>;
   private readonly mutex = new Mutex();
@@ -22,13 +21,12 @@ export class JsonlWriter {
     return new JsonlWriter(stream);
   }
 
-  async append(record: unknown): Promise<void> {
+  async append(record: EvaluationResult): Promise<void> {
     await this.mutex.runExclusive(async () => {
       if (this.closed) {
         throw new Error('Cannot write to closed JSONL writer');
       }
-      // Convert camelCase keys to snake_case for Python ecosystem compatibility
-      const snakeCaseRecord = toSnakeCaseDeep(record);
+      const snakeCaseRecord = serializeEvaluationResultWire(record);
       const line = `${JSON.stringify(snakeCaseRecord)}\n`;
       if (!this.stream.write(line)) {
         await new Promise<void>((resolve, reject) => {

apps/cli/src/commands/eval/task-bundle.ts

@@ -10,11 +10,10 @@ import {
   type TestMessage,
   type WorkspaceConfig,
   parseYamlValue,
+  toSnakeCaseDeep,
 } from '@agentv/core';
 import { stringify as stringifyYaml } from 'yaml';
 
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
-
 const TEST_BUNDLE_DIRNAME = 'test';
 const TASK_EVAL_FILENAME = 'EVAL.yaml';
 const TASK_TARGETS_FILENAME = 'targets.yaml';

apps/cli/src/commands/inspect/list.ts

@@ -1,5 +1,5 @@
+import { toSnakeCaseDeep } from '@agentv/core';
 import { command, number, oneOf, option, optional, string } from 'cmd-ts';
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
 import {
   type ResultFileMeta,
   c,

apps/cli/src/commands/inspect/search.ts

@@ -15,8 +15,8 @@
 
 import { existsSync, readFileSync, readdirSync, statSync } from 'node:fs';
 import path from 'node:path';
+import { toSnakeCaseDeep } from '@agentv/core';
 import { command, oneOf, option, optional, positional, string } from 'cmd-ts';
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
 import { isReservedResultsNamespace } from '../eval/result-layout.js';
 import { c, padRight } from './utils.js';
 

apps/cli/src/commands/inspect/stats.ts

@@ -1,5 +1,5 @@
+import { toSnakeCaseDeep } from '@agentv/core';
 import { command, oneOf, option, optional, positional, string } from 'cmd-ts';
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
 import {
   type RawResult,
   c,

apps/cli/src/commands/trend/index.ts

@@ -1,8 +1,8 @@
 import path from 'node:path';
 
+import { toSnakeCaseDeep } from '@agentv/core';
 import { command, flag, number, oneOf, option, optional, restPositionals, string } from 'cmd-ts';
 
-import { toSnakeCaseDeep } from '../../utils/case-conversion.js';
 import { RESULT_INDEX_FILENAME, isRunManifestPath } from '../eval/result-layout.js';
 import { listResultFiles } from '../inspect/utils.js';
 import {

apps/cli/test/commands/eval/aggregate.test.ts

@@ -12,7 +12,7 @@ import { tmpdir } from 'node:os';
 import path from 'node:path';
 
 import { type EvaluationResult, buildTraceFromMessages } from '@agentv/core';
-import { toSnakeCaseDeep } from '../../../src/utils/case-conversion.js';
+import { toSnakeCaseDeep } from '@agentv/core';
 
 import {
   RESULT_INDEX_FILENAME,

apps/cli/test/commands/eval/artifact-writer.test.ts

@@ -14,6 +14,7 @@ import {
   buildResultIndexArtifact,
   buildTraceFromMessages,
   parseYamlValue,
+  toSnakeCaseDeep,
 } from '@agentv/core';
 
 import {
@@ -33,7 +34,6 @@ import {
   writeArtifactsFromResults,
 } from '../../../src/commands/eval/artifact-writer.js';
 import { prepareResultForJsonl } from '../../../src/commands/eval/run-eval.js';
-import { toSnakeCaseDeep } from '../../../src/utils/case-conversion.js';
 
 function makeResult(overrides: Partial<EvaluationResult> = {}): EvaluationResult {
   const result = {