diff --git a/src/cli/program.ts b/src/cli/program.ts
index d343e48..214e9b8 100644
--- a/src/cli/program.ts
+++ b/src/cli/program.ts
@@ -3,6 +3,8 @@ import { writeFile } from 'node:fs/promises';
 import { loadConfig } from '../config/config.js';
 import { createGmailClient } from '../gmail/client.js';
 import { ExcelWriter } from '../output/excel.js';
+import { createGoogleSheetsWriter } from '../output/googleSheets.js';
+import { OutputWriter } from '../output/sheets.js';
 import { runCatalog } from '../run/runCatalog.js';
 import { validateDateFilters } from './flags.js';
 
@@ -54,9 +56,7 @@ export function createProgram(): Command {
     .action(async (options) => {
       validateDateFilters(options);
       const config = await loadConfig(options.config);
-      const writers = config.output.excel.enabled
-        ? [new ExcelWriter(config.output.excel.path)]
-        : [];
+      const writers = await createWriters(config);
       const messages =
         process.env.NLC_FIXTURE === '1'
           ? fixtureMessages()
@@ -82,6 +82,31 @@ export function createProgram(): Command {
   return program;
 }
 
+async function createWriters(
+  config: Awaited<ReturnType<typeof loadConfig>>
+): Promise<OutputWriter[]> {
+  const writers: OutputWriter[] = [];
+  if (config.output.excel.enabled) {
+    writers.push(new ExcelWriter(config.output.excel.path));
+  }
+  if (config.output.sheetsApi.enabled) {
+    if (!config.output.sheetsApi.credentials || !config.output.sheetsApi.token) {
+      throw new Error('Google Sheets output requires sheets_api credentials and token paths');
+    }
+    if (!config.output.sheetsApi.spreadsheetId) {
+      throw new Error('Google Sheets output requires output.sheets_api.spreadsheet_id');
+    }
+    writers.push(
+      await createGoogleSheetsWriter({
+        credentials: config.output.sheetsApi.credentials,
+        token: config.output.sheetsApi.token,
+        spreadsheetId: config.output.sheetsApi.spreadsheetId
+      })
+    );
+  }
+  return writers;
+}
+
 async function fetchGmailMessages(
   config: Awaited<ReturnType<typeof loadConfig>>,
   options: { dryRun?: number | boolean; from?: string; to?: string; last?: string }
diff --git a/src/gmail/client.ts b/src/gmail/client.ts
index 8cb526a..f18ee16 100644
--- a/src/gmail/client.ts
+++ b/src/gmail/client.ts
@@ -10,6 +10,14 @@ import { NewsletterMessage } from '../parsing/types.js';
 const gmailScopes = ['https://www.googleapis.com/auth/gmail.readonly'];
 
 export async function authorizeGmail(credentialsPath: string, tokenPath: string) {
+  return authorizeGoogleOAuth(credentialsPath, tokenPath, gmailScopes);
+}
+
+export async function authorizeGoogleOAuth(
+  credentialsPath: string,
+  tokenPath: string,
+  scopes: string[]
+) {
   const credentials = JSON.parse(await readFile(expandHome(credentialsPath), 'utf8'));
   const clientConfig = credentials.installed ?? credentials.web;
   const oauth = new google.auth.OAuth2(
@@ -22,7 +30,7 @@ export async function authorizeGmail(credentialsPath: string, tokenPath: string)
     oauth.setCredentials(JSON.parse(await readFile(expandHome(tokenPath), 'utf8')));
     return oauth;
   } catch {
-    const url = oauth.generateAuthUrl({ access_type: 'offline', scope: gmailScopes });
+    const url = oauth.generateAuthUrl({ access_type: 'offline', scope: scopes });
     const code = await waitForBrowserCode(url);
     const { tokens } = await oauth.getToken(code);
     oauth.setCredentials(tokens);
diff --git a/src/output/excel.ts b/src/output/excel.ts
index 524b256..2f028e4 100644
--- a/src/output/excel.ts
+++ b/src/output/excel.ts
@@ -3,6 +3,16 @@ import { dirname } from 'node:path';
 import XLSX from 'xlsx';
 import { CatalogPayload, OutputWriter, sanitizeSheetName } from './sheets.js';
 
+const contentColumns = [
+  'Issue Date',
+  'Category',
+  'Link URL',
+  'Title',
+  'Description',
+  'Page Title + Meta',
+  'Also In'
+];
+
 export class ExcelWriter implements OutputWriter {
   public constructor(private readonly path: string) {}
 
@@ -14,7 +24,11 @@ export class ExcelWriter implements OutputWriter {
       grouped.set(sheet, [...(grouped.get(sheet) ?? []), row]);
     }
     for (const [sheet, rows] of grouped) {
-      XLSX.utils.book_append_sheet(workbook, XLSX.utils.json_to_sheet(rows), sheet);
+      XLSX.utils.book_append_sheet(
+        workbook,
+        XLSX.utils.json_to_sheet(rows.map(toContentOutputRow), { header: contentColumns }),
+        sheet
+      );
     }
     XLSX.utils.book_append_sheet(
       workbook,
@@ -30,3 +44,7 @@ export class ExcelWriter implements OutputWriter {
     XLSX.writeFile(workbook, this.path);
   }
 }
+
+function toContentOutputRow(row: Record<string, unknown>): Record<string, unknown> {
+  return Object.fromEntries(contentColumns.map((column) => [column, row[column] ?? '']));
+}
diff --git a/src/output/googleSheets.ts b/src/output/googleSheets.ts
index afd9477..f588785 100644
--- a/src/output/googleSheets.ts
+++ b/src/output/googleSheets.ts
@@ -1,15 +1,97 @@
 import { google } from 'googleapis';
-import { CatalogPayload, OutputWriter } from './sheets.js';
+import { authorizeGoogleOAuth } from '../gmail/client.js';
+import { CatalogPayload, escapeCell, OutputWriter, sanitizeSheetName } from './sheets.js';
+
+const sheetsScopes = ['https://www.googleapis.com/auth/spreadsheets'];
+type SheetsClient = ReturnType<typeof google.sheets> | any;
+
+const contentColumns = [
+  'Issue Date',
+  'Category',
+  'Link URL',
+  'Title',
+  'Description',
+  'Page Title + Meta',
+  'Also In'
+];
+const sponsorColumns = ['Newsletter', 'Sponsor', 'Link', 'Description'];
+const deadColumns = ['URL', 'Status', 'Source', 'Date'];
 
 export class GoogleSheetsWriter implements OutputWriter {
   public constructor(
     private readonly spreadsheetId: string,
-    private readonly auth: Parameters<typeof google.sheets>[0]['auth']
+    private readonly auth: Parameters<typeof google.sheets>[0]['auth'],
+    private readonly sheetsClient?: SheetsClient
   ) {}
 
-  public async write(_payload: CatalogPayload): Promise<void> {
-    const sheets = google.sheets({ version: 'v4', auth: this.auth });
-    await sheets.spreadsheets.get({ spreadsheetId: this.spreadsheetId });
-    // Real row append calls are intentionally centralized here; tests use a fake writer.
+  public async write(payload: CatalogPayload): Promise<void> {
+    const sheets = this.sheetsClient ?? google.sheets({ version: 'v4', auth: this.auth });
+    const existing = await this.getExistingSheetNames(sheets);
+    const grouped = this.groupContentRows(payload.rows);
+    const desired = [...grouped.keys(), 'Sponsored Links', 'Dead Links'];
+    const missing = desired.filter((sheet) => !existing.has(sheet));
+
+    if (missing.length > 0) {
+      await sheets.spreadsheets.batchUpdate({
+        spreadsheetId: this.spreadsheetId,
+        requestBody: {
+          requests: missing.map((title) => ({ addSheet: { properties: { title } } }))
+        }
+      });
+    }
+
+    for (const [sheet, rows] of grouped) {
+      await this.appendRows(sheets, sheet, contentColumns, rows);
+    }
+    await this.appendRows(sheets, 'Sponsored Links', sponsorColumns, payload.sponsors);
+    await this.appendRows(sheets, 'Dead Links', deadColumns, payload.deadLinks);
+  }
+
+  private async getExistingSheetNames(sheets: SheetsClient): Promise<Set<string>> {
+    const spreadsheet = await sheets.spreadsheets.get({ spreadsheetId: this.spreadsheetId });
+    return new Set(
+      (spreadsheet.data.sheets ?? [])
+        .map((sheet: any) => sheet.properties?.title)
+        .filter((title: unknown): title is string => typeof title === 'string')
+    );
+  }
+
+  private groupContentRows(rows: Record<string, unknown>[]): Map<string, Record<string, unknown>[]> {
+    const grouped = new Map<string, Record<string, unknown>[]>();
+    for (const row of rows) {
+      const sheet = sanitizeSheetName(String(row['Source Newsletter'] ?? 'Newsletter'), 100);
+      grouped.set(sheet, [...(grouped.get(sheet) ?? []), row]);
+    }
+    return grouped;
+  }
+
+  private async appendRows(
+    sheets: SheetsClient,
+    sheet: string,
+    columns: string[],
+    rows: Record<string, unknown>[]
+  ): Promise<void> {
+    if (rows.length === 0) {
+      return;
+    }
+
+    await sheets.spreadsheets.values.append({
+      spreadsheetId: this.spreadsheetId,
+      range: `'${sheet.replaceAll("'", "''")}'!A1`,
+      valueInputOption: 'RAW',
+      insertDataOption: 'INSERT_ROWS',
+      requestBody: {
+        values: [columns, ...rows.map((row) => columns.map((column) => escapeCell(row[column] ?? '')))]
+      }
+    });
   }
 }
+
+export async function createGoogleSheetsWriter(options: {
+  credentials: string;
+  token: string;
+  spreadsheetId: string;
+}): Promise<GoogleSheetsWriter> {
+  const auth = await authorizeGoogleOAuth(options.credentials, options.token, sheetsScopes);
+  return new GoogleSheetsWriter(options.spreadsheetId, auth);
+}
diff --git a/src/parsing/generic.ts b/src/parsing/generic.ts
index b75dd40..0531b79 100644
--- a/src/parsing/generic.ts
+++ b/src/parsing/generic.ts
@@ -15,6 +15,69 @@ function nearestSection($: cheerio.CheerioAPI, element: any): string | undefined
   return parentPrevious || undefined;
 }
 
+type TextToken = { type: 'text'; text: string };
+type AnchorToken = { type: 'anchor'; element: any; text: string };
+type Token = TextToken | AnchorToken;
+
+function compactText(value: string): string {
+  return value.replace(/\s+/g, ' ').trim();
+}
+
+function textBeforeSponsorMarker(value: string): string {
+  return compactText(value.split(/\b(?:sponsor|sponsored|advertisement|partner)\b/i)[0] ?? value);
+}
+
+function sponsorMarkerText(value: string): string | undefined {
+  return value.match(/\b(?:sponsor|sponsored|advertisement|partner)\b/i)?.[0].toUpperCase();
+}
+
+function blockTokens($: cheerio.CheerioAPI, node: any): Token[] {
+  if (node.type === 'text') {
+    const text = compactText(node.data ?? '');
+    return text ? [{ type: 'text', text }] : [];
+  }
+
+  if (node.type === 'tag' && node.name === 'a' && $(node).attr('href')) {
+    return [{ type: 'anchor', element: node, text: compactText($(node).text()) }];
+  }
+
+  return $(node)
+    .contents()
+    .toArray()
+    .flatMap((child) => blockTokens($, child));
+}
+
+function localContext($: cheerio.CheerioAPI, element: any, title: string): string {
+  const block = $(element).closest('p,li,td,div').first();
+  const tokens = blockTokens($, block.get(0));
+  const anchorIndex = tokens.findIndex(
+    (token) => token.type === 'anchor' && token.element === element
+  );
+  if (anchorIndex === -1) {
+    return title;
+  }
+
+  const parts: string[] = [];
+  const previousText = tokens
+    .slice(0, anchorIndex)
+    .reverse()
+    .find((token): token is TextToken => token.type === 'text')?.text;
+  const marker = previousText ? sponsorMarkerText(previousText) : undefined;
+  if (marker) {
+    parts.push(marker);
+  }
+  parts.push(title);
+
+  for (const token of tokens.slice(anchorIndex + 1)) {
+    if (token.type === 'anchor') {
+      break;
+    }
+    parts.push(textBeforeSponsorMarker(token.text));
+  }
+
+  return compactText(parts.join(' '));
+}
+
 export const genericParser: ParserPlugin = {
   name: 'generic',
   matches: () => true,
@@ -24,9 +87,9 @@ export const genericParser: ParserPlugin = {
       .toArray()
       .map((element) => {
         const anchor = $(element);
-        const title = anchor.text().replace(/\s+/g, ' ').trim() || anchor.attr('aria-label') || '';
+        const title = compactText(anchor.text()) || anchor.attr('aria-label') || '';
         const url = anchor.attr('href') ?? '';
-        const context = anchor.closest('p,li,td,div').text().replace(/\s+/g, ' ').trim();
+        const context = localContext($, element, title);
 
         return {
           url,
diff --git a/src/run/runCatalog.ts b/src/run/runCatalog.ts
index b7114d0..edb024a 100644
--- a/src/run/runCatalog.ts
+++ b/src/run/runCatalog.ts
@@ -35,6 +35,18 @@ function issueDate(date: string): string {
   return new Date(date).toISOString().slice(0, 10);
 }
 
+function sponsorDescription(linkTitle: string, description: string): string {
+  return description
+    .replace(/\b(?:sponsor|sponsored|advertisement|partner)\b/i, '')
+    .replace(new RegExp(`^\\s*${escapeRegExp(linkTitle)}\\s*(?:[-:–—]|\\s)+`, 'i'), '')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+function escapeRegExp(value: string): string {
+  return value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+}
+
 export async function runCatalog(options: RunOptions): Promise<RunSummary> {
   const config = normalizeConfig(options.config);
   const state = new StateStore(config.stateFile);
@@ -76,7 +88,7 @@ export async function runCatalog(options: RunOptions): Promise<RunSummary> {
             Newsletter: newsletterName(message.from),
             Sponsor: link.title,
             Link: link.normalizedUrl,
-            Description: link.description ?? ''
+            Description: sponsorDescription(link.title, link.description ?? '')
           });
           continue;
         }
diff --git a/tests/excel.test.ts b/tests/excel.test.ts
index 9c205de..4ca9364 100644
--- a/tests/excel.test.ts
+++ b/tests/excel.test.ts
@@ -35,5 +35,9 @@ describe('ExcelWriter', () => {
     const workbook = XLSX.readFile(path);
     expect(workbook.SheetNames[0]).toBe('A Very Long Newsletter Name Tha');
     expect(workbook.SheetNames[0].length).toBe(31);
+    const rows = XLSX.utils.sheet_to_json<Record<string, unknown>>(
+      workbook.Sheets[workbook.SheetNames[0]]
+    );
+    expect(rows[0]).not.toHaveProperty('Source Newsletter');
   });
 });
diff --git a/tests/googleSheets.test.ts b/tests/googleSheets.test.ts
new file mode 100644
index 0000000..97c33a8
--- /dev/null
+++ b/tests/googleSheets.test.ts
@@ -0,0 +1,79 @@
+import { describe, expect, it } from 'vitest';
+import { GoogleSheetsWriter } from '../src/output/googleSheets.js';
+
+describe('GoogleSheetsWriter', () => {
+  it('creates missing sheets and appends content, sponsor, and dead-link rows', async () => {
+    const calls: unknown[] = [];
+    const sheets = {
+      spreadsheets: {
+        get: async () => ({
+          data: { sheets: [{ properties: { title: 'Sponsored Links' } }] }
+        }),
+        batchUpdate: async (request: unknown) => {
+          calls.push(request);
+        },
+        values: {
+          append: async (request: unknown) => {
+            calls.push(request);
+          }
+        }
+      }
+    };
+
+    await new GoogleSheetsWriter('sheet-1', undefined, sheets).write({
+      rows: [
+        {
+          'Source Newsletter': 'A Very Long Newsletter Name That Is Fine In Google Sheets',
+          Title: '=Formula',
+          'Link URL': 'https://example.com'
+        }
+      ],
+      sponsors: [{ Newsletter: 'Weekly', Sponsor: 'Acme', Link: 'https://sponsor.example' }],
+      deadLinks: [{ URL: 'https://dead.example', Status: '404' }]
+    });
+
+    expect(calls[0]).toMatchObject({
+      spreadsheetId: 'sheet-1',
+      requestBody: {
+        requests: [
+          {
+            addSheet: {
+              properties: { title: 'A Very Long Newsletter Name That Is Fine In Google Sheets' }
+            }
+          },
+          { addSheet: { properties: { title: 'Dead Links' } } }
+        ]
+      }
+    });
+    expect(calls).toContainEqual(
+      expect.objectContaining({
+        spreadsheetId: 'sheet-1',
+        range: "'A Very Long Newsletter Name That Is Fine In Google Sheets'!A1",
+        requestBody: {
+          values: [
+            [
+              'Issue Date',
+              'Category',
+              'Link URL',
+              'Title',
+              'Description',
+              'Page Title + Meta',
+              'Also In'
+            ],
+            ['', '', 'https://example.com', "'=Formula", '', '', '']
+          ]
+        }
+      })
+    );
+    expect(calls).toContainEqual(
+      expect.objectContaining({
+        range: "'Sponsored Links'!A1"
+      })
+    );
+    expect(calls).toContainEqual(
+      expect.objectContaining({
+        range: "'Dead Links'!A1"
+      })
+    );
+  });
+});
diff --git a/tests/parsing.test.ts b/tests/parsing.test.ts
index a78959b..fc58624 100644
--- a/tests/parsing.test.ts
+++ b/tests/parsing.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, it } from 'vitest';
+import { genericParser } from '../src/parsing/generic.js';
 import { selectParser } from '../src/parsing/plugins.js';
 
 describe('parser plugin selection', () => {
@@ -11,3 +12,27 @@ describe('parser plugin selection', () => {
     ).toBe('generic');
   });
 });
+
+describe('generic parser', () => {
+  it('keeps descriptions local to each link when many links share a container', () => {
+    const links = genericParser.parse({
+      html: `
+        <div>
+          <h2>CSS & HTML Tools</h2>
+          <a href="https://cascade.example">Cascade</a> - CSS property icons.
+          <a href="https://frames.example">Fancy Frames</a> - Decorative border generator.
+          SPONSORED
+          <a href="https://flexboxle.example">flexboxle</a> - A daily puzzle game to master CSS Flexbox.
+          <a href="https://types.example">Typescale AI</a> - A typescale generator.
+        </div>
+      `
+    });
+
+    expect(links.map((link) => link.description)).toEqual([
+      'Cascade - CSS property icons.',
+      'Fancy Frames - Decorative border generator.',
+      'SPONSORED flexboxle - A daily puzzle game to master CSS Flexbox.',
+      'Typescale AI - A typescale generator.'
+    ]);
+  });
+});
diff --git a/tests/run.test.ts b/tests/run.test.ts
index 4becabd..e9c81ae 100644
--- a/tests/run.test.ts
+++ b/tests/run.test.ts
@@ -41,4 +41,49 @@ describe('run orchestration', () => {
     expect(result.linksExtracted).toBe(1);
     expect(writes).toHaveLength(0);
   });
+
+  it('only sends locally marked sponsored links to the sponsored output', async () => {
+    const stateFile = join(dir, 'state.json');
+    const writes: any[] = [];
+
+    await runCatalog({
+      config: {
+        gmail: { folder: 'Newsletters' },
+        output: { name: 'Catalog', excel: { enabled: true, path: join(dir, 'out.xlsx') } },
+        stateFile
+      },
+      messages: [
+        {
+          id: 'msg-1',
+          messageId: '<msg-1>',
+          from: 'Web Tools Weekly <w@example.com>',
+          date: '2026-05-16T00:00:00.000Z',
+          html: `
+            <div>
+              <a href="https://cascade.example">Cascade</a> - CSS property icons.
+              <a href="https://frames.example">Fancy Frames</a> - Decorative borders.
+              SPONSORED
+              <a href="https://flexboxle.example">flexboxle</a> - A daily puzzle game.
+              <a href="https://types.example">Typescale AI</a> - A typescale generator.
+            </div>
+          `
+        }
+      ],
+      writers: [{ write: async (payload) => writes.push(payload) }]
+    });
+
+    expect(writes[0].sponsors).toEqual([
+      {
+        Newsletter: 'Web Tools Weekly',
+        Sponsor: 'flexboxle',
+        Link: 'https://flexboxle.example/',
+        Description: 'A daily puzzle game.'
+      }
+    ]);
+    expect(writes[0].rows.map((row: any) => row.Title)).toEqual([
+      'Cascade',
+      'Fancy Frames',
+      'Typescale AI'
+    ]);
+  });
 });