BookmarkMe for ChatGPT

A Chrome Extension (Manifest V3) that lets you save specific ChatGPT prompt/response pairs and jump back to them later.

What it does

• Adds a Save Chat button to assistant replies inside ChatGPT.
• Stores bookmarks in chrome.storage.local.
• Shows bookmarks for the current conversation inside a side panel.
• Jumps back to a saved response by searching visible messages first, then scrolling upward in steps until the message is found or the top is reached.
• Briefly highlights the target message after navigation.

Stored bookmark shape

The extension stores bookmarks under the bookmarks key in chrome.storage.local.

{
  "id": "uuid",
  "title": "Prompt preview",
  "textSnippet": "First 100 chars of the assistant response",
  "chatUrl": "https://chatgpt.com/c/...",
  "timestamp": 1712345678901,
  "anchorIndex": 12,
  "promptSnippet": "First 100 chars of the user prompt"
}

The first five fields satisfy the requested storage contract. anchorIndex and promptSnippet are included as extra fingerprint data to improve matching reliability.

Files

• manifest.json: MV3 manifest with only storage and sidePanel as named permissions, plus ChatGPT host access.
• background.js: Enables opening the side panel from the extension action and limits the panel to ChatGPT tabs.
• content.js: Injects save controls, fingerprints message pairs, and performs search-and-scroll navigation.
• sidepanel.html: Side panel UI shell and styles.
• sidepanel.js: Loads chat-specific bookmarks, renders cards, and sends jump requests to the page.

Notes

• The content script uses resilient selectors and fallback role inference because ChatGPT does not expose stable message IDs.
• Bookmarks are scoped to the normalized conversation URL, so the side panel only shows items for the current chat.
• Duplicate bookmarks for the same response are blocked using URL, snippet, and approximate turn index checks.