diff --git a/packages/shared/src/evaluation/experiment-service.ts b/packages/shared/src/evaluation/experiment-service.ts
index 41daf4f..08a64e3 100644
--- a/packages/shared/src/evaluation/experiment-service.ts
+++ b/packages/shared/src/evaluation/experiment-service.ts
@@ -531,7 +531,7 @@ export class ExperimentService {
       };
       await this.traceRun(failedRun, session.id, caseItem.locale);
       await this.kernel.deleteSession(session.id).catch(() => undefined);
-      return { run: failedRun, aborted: false };
+      return { run: failedRun, aborted: false, runtimeUnusable: false };
     }
 
     const collected: AgentEvent[] = [];
diff --git a/packages/shared/src/portfolio-import/parsers.test.ts b/packages/shared/src/portfolio-import/parsers.test.ts
index 0f4059a..0c9a51c 100644
--- a/packages/shared/src/portfolio-import/parsers.test.ts
+++ b/packages/shared/src/portfolio-import/parsers.test.ts
@@ -108,6 +108,30 @@ describe('splitCsvLine', () => {
 })
 
 describe('parseCsv', () => {
+  it('keeps thousands separators inside tab-delimited numeric cells', () => {
+    const [row] = parseCsv('Symbol\tQuantity\tCost\tCurrency\nAAPL.US\t1,000\t1,234.50\tUSD')
+    expect(row).toMatchObject({ symbol: 'AAPL.US', quantity: 1000, costPrice: 1234.5, currency: 'USD', confidence: 1, issues: [] })
+  })
+
+  it('uses the header delimiter even when data contains commas and quoted newlines', () => {
+    const [row] = parseCsv('Symbol\tName\tQuantity\tCost\nAAPL.US\t"Apple,\nInc."\t100\t180.5')
+    expect(row).toMatchObject({ name: 'Apple,\nInc.', quantity: 100, costPrice: 180.5, issues: [] })
+    const [plain] = parseCsv('Symbol\tName\tQuantity\tCost\nAAPL.US\tApple, Inc.\t100\t180.5')
+    expect(plain).toMatchObject({ name: 'Apple, Inc.', quantity: 100, costPrice: 180.5, issues: [] })
+  })
+
+  it('does not split embedded tabs in comma-delimited fields', () => {
+    const [row] = parseCsv('Symbol,Name,Quantity,Cost\nAAPL.US,Apple\tInc.,100,180.5')
+    expect(row).toMatchObject({ name: 'Apple\tInc.', quantity: 100, costPrice: 180.5, issues: [] })
+  })
+
+  it('supports headerless TSV and explicit TSV header mappings', () => {
+    const [row] = parseCsv('AAPL.US\tApple, Inc.\t1,000\t180.5')
+    expect(row).toMatchObject({ name: 'Apple, Inc.', quantity: 1000, costPrice: 180.5, issues: [] })
+    const [mapped] = parseCsv('Ticker\tUnits\tAvg Cost\nAAPL.US\t1,000\t180.5', { symbol: 'Ticker', quantity: 'Units', cost: 'Avg Cost' })
+    expect(mapped).toMatchObject({ symbol: 'AAPL.US', quantity: 1000, costPrice: 180.5, issues: [] })
+  })
+
   it('flags formatting-only quantities and costs without inventing zeros', () => {
     const rows = parseCsv('Symbol,Quantity,Cost\nAAPL.US,100,$\nMSFT.US,",",180.5\n0700.HK,500,320')
     expect(rows).toHaveLength(3)
diff --git a/packages/shared/src/portfolio-import/parsers.ts b/packages/shared/src/portfolio-import/parsers.ts
index cc96ca2..c8fa1dc 100644
--- a/packages/shared/src/portfolio-import/parsers.ts
+++ b/packages/shared/src/portfolio-import/parsers.ts
@@ -130,8 +130,18 @@ export function splitCsvRows(text: string): string[] {
   return rows
 }
 
-/** Split one CSV row into cells (comma or tab separated, quote-aware). */
-export function splitCsvLine(line: string): string[] {
+/** Use the first unquoted separator; quoted punctuation belongs to a cell. */
+function csvDelimiter(line: string): ',' | '\t' {
+  let inQuotes = false
+  for (const ch of line) {
+    if (ch === '"') inQuotes = !inQuotes
+    else if (!inQuotes && (ch === ',' || ch === '\t')) return ch
+  }
+  return ','
+}
+
+/** Split one CSV row using one delimiter, honoring quoted cells. */
+export function splitCsvLine(line: string, delimiter: ',' | '\t' = csvDelimiter(line)): string[] {
   const cells: string[] = []
   let current = ''
   let inQuotes = false
@@ -150,7 +160,7 @@ export function splitCsvLine(line: string): string[] {
       }
     } else if (ch === '"') {
       inQuotes = true
-    } else if (ch === ',' || ch === '\t') {
+    } else if (ch === delimiter) {
       cells.push(current)
       current = ''
     } else {
@@ -180,9 +190,10 @@ export interface CsvColumnMap {
  */
 export function resolveCsvColumns(
   firstRow: string,
-  headerMapping?: CsvHeaderMapping
+  headerMapping?: CsvHeaderMapping,
+  delimiter: ',' | '\t' = csvDelimiter(firstRow)
 ): CsvColumnMap {
-  const cells = splitCsvLine(firstRow).map(normalizeHeaderCell)
+  const cells = splitCsvLine(firstRow, delimiter).map(normalizeHeaderCell)
   const byIndex = new Map<number, HeaderField>()
   const fields = Object.keys(HEADER_ALIASES) as HeaderField[]
 
@@ -315,12 +326,13 @@ export function flagDuplicates(rows: PortfolioImportRow[]): PortfolioImportRow[]
 export function parseCsv(text: string, headerMapping?: CsvHeaderMapping): PortfolioImportRow[] {
   const rawRows = splitCsvRows(text)
   if (rawRows.length === 0) return []
-  const columns = resolveCsvColumns(rawRows[0], headerMapping)
+  const delimiter = csvDelimiter(rawRows[0])
+  const columns = resolveCsvColumns(rawRows[0], headerMapping, delimiter)
   const start = columns.isHeader ? 1 : 0
 
   const rows: PortfolioImportRow[] = []
   for (let i = start; i < rawRows.length; i++) {
-    const cells = splitCsvLine(rawRows[i])
+    const cells = splitCsvLine(rawRows[i], delimiter)
     if (cells.every((cell) => cell.trim() === '')) continue
     rows.push(buildRow(fieldsFromCells(cells, columns.byIndex)))
   }
diff --git a/packages/shared/src/portfolio-import/repository.test.ts b/packages/shared/src/portfolio-import/repository.test.ts
index dbdaad6..cb15011 100644
--- a/packages/shared/src/portfolio-import/repository.test.ts
+++ b/packages/shared/src/portfolio-import/repository.test.ts
@@ -21,6 +21,14 @@ const INPUT = {
 }
 
 describe('ManualPortfolioRepository', () => {
+  it('persists TSV quantities and costs without splitting thousands separators', async () => {
+    const store = tempStore()
+    const draft = createDraft('csv', parseCsv('Symbol\tQuantity\tCost\tCurrency\nAAPL.US\t1,000\t1,234.50\tUSD'))
+    const created = await new ManualPortfolioRepository(store).create(draftToPortfolioInput(draft, 'TSV'))
+    const reloaded = await new ManualPortfolioRepository(store).get(created.id)
+    expect(reloaded?.holdings).toEqual([{ symbol: 'AAPL.US', name: '', quantity: 1000, costPrice: 1234.5, currency: 'USD' }])
+  })
+
   it('keeps invalid numeric cells absent through draft review and persistence', async () => {
     const store = tempStore()
     const draft = createDraft('csv', parseCsv('Symbol,Quantity,Cost\nAAPL.US,100,$\nMSFT.US,",",180.5'))