fix(mothership): fail outputTable writes per-row when any row matches no columns

Review feedback: the all-rows-empty guard let mixed batches slip
unmatched rows through as empty objects. Reject on the first row that
maps to zero columns, naming the row. Adds the missing CSV-suite parity
tests (no-matching-headers, service-error surfacing).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: TheodoreSpeaks

apps/sim/lib/copilot/request/tools/tables.test.ts

@@ -123,7 +123,20 @@ describe('maybeWriteOutputToTable', () => {
     )
 
     expect(result.success).toBe(false)
-    expect(result.error).toContain('None of the row keys match columns')
+    expect(result.error).toContain('Row 1 has no keys matching columns')
+    expect(mockReplaceTableRows).not.toHaveBeenCalled()
+  })
+
+  it('fails fast when only some rows match instead of writing empty rows', async () => {
+    const result = await maybeWriteOutputToTable(
+      FunctionExecute.id,
+      { outputTable: 'tbl_1' },
+      { success: true, output: { result: [{ name: 'Alice' }, { wrong: 'x' }] } },
+      buildContext()
+    )
+
+    expect(result.success).toBe(false)
+    expect(result.error).toContain('Row 2 has no keys matching columns')
     expect(mockReplaceTableRows).not.toHaveBeenCalled()
   })
 
@@ -178,4 +191,31 @@ describe('maybeWriteReadCsvToTable', () => {
       { col_name: 'Bob', col_age: '40' },
     ])
   })
+
+  it('fails fast when the file headers match no table columns', async () => {
+    const result = await maybeWriteReadCsvToTable(
+      ReadTool.id,
+      { outputTable: 'tbl_1', path: 'files/people.csv' },
+      { success: true, output: { content: 'wrong,headers\n1,2' } },
+      buildContext()
+    )
+
+    expect(result.success).toBe(false)
+    expect(result.error).toContain('Row 1 has no keys matching columns')
+    expect(mockReplaceTableRows).not.toHaveBeenCalled()
+  })
+
+  it('surfaces service validation failures as tool errors', async () => {
+    mockReplaceTableRows.mockRejectedValue(new Error('Row 1: name is required'))
+
+    const result = await maybeWriteReadCsvToTable(
+      ReadTool.id,
+      { outputTable: 'tbl_1', path: 'files/people.csv' },
+      { success: true, output: { content: 'age\n30' } },
+      buildContext()
+    )
+
+    expect(result.success).toBe(false)
+    expect(result.error).toContain('Row 1: name is required')
+  })
 })

apps/sim/lib/copilot/request/tools/tables.ts

@@ -30,9 +30,10 @@ async function replaceTableRowsFromWire(
 ): Promise<{ error?: string }> {
   const idByName = buildIdByName(table.schema)
   const idKeyedRows = rows.map((row) => rowDataNameToId(row as RowData, idByName))
-  if (idKeyedRows.every((row) => Object.keys(row).length === 0)) {
+  const emptyIndex = idKeyedRows.findIndex((row) => Object.keys(row).length === 0)
+  if (emptyIndex !== -1) {
     return {
-      error: `None of the row keys match columns on table "${table.name}" (columns: ${table.schema.columns.map((c) => c.name).join(', ')})`,
+      error: `Row ${emptyIndex + 1} has no keys matching columns on table "${table.name}" (columns: ${table.schema.columns.map((c) => c.name).join(', ')})`,
     }
   }
   await replaceTableRows(