PortSmith Privacy Policy

Chrome extension for moving your AI assistant setup between ChatGPT, Claude and Gemini

Effective date: September 17, 2026 (version 0.4.0)

What PortSmith does

PortSmith copies your AI assistant setup (projects, custom GPTs, Gems, instructions, knowledge files and memory) from one of ChatGPT, Claude or Gemini to another. Everything runs inside your browser. PortSmith has no servers, and it never sends your data to its developer or to anyone else.

What PortSmith reads

PortSmith only works with the accounts you are already signed in to in Chrome, and only when you start an extraction or a migration in its side panel.

From ChatGPT (chatgpt.com), when ChatGPT is the source:

• Custom GPTs: name, description, instructions, conversation starters and knowledge file names
• Projects: name, instructions and knowledge files, including copies of the files themselves
• Memory and custom instructions: the saved memories and your custom instruction text, when those settings pages are open
• Your ChatGPT data export (optional): if you add the export file, PortSmith reads it on your device to find conversation titles and which GPT or project each conversation belongs to
• Session token: ChatGPT's own session token is used to call ChatGPT's API from the ChatGPT tab. It is kept in memory for a few minutes and never saved

From Claude (claude.ai), when Claude is the source:

• Projects: name, description, instructions and dates
• Project knowledge: the text of project documents, and the names of other project files
• Project memory (optional): what Claude remembers from chats in each project
• Memory outside projects (optional): what Claude remembers about you in general
• Instructions for Claude (optional): the personal preferences in your Claude settings

From Gemini (gemini.google.com), when Gemini is the source:

• Gems: name, description and instructions. Gemini's page token is used for the request and is not saved

PortSmith does not read your chat messages in any assistant, your billing details, your passwords or anything unrelated to your assistant setup.

What PortSmith writes

Only to the platform you choose as the target, and only after you start the migration:

• Claude: creates projects, sets their instructions, adds knowledge documents and files, and adds a project memory document. It then reads the new projects back to check them
• Gemini: creates Gems with their name, description and instructions, and adds the copied knowledge files and a project memory document to each Gem's knowledge. In automatic and hybrid mode it also saves your memories and custom instructions as entries in "Your instructions for Gemini"
• ChatGPT: nothing. PortSmith shows the steps and the text to copy, and you create the projects yourself

Copy buttons put text on your clipboard, and download buttons save files to your computer, only when you click them.

What PortSmith stores on your device

PortSmith uses Chrome's local storage. Nothing is synced across devices.

IndexedDB:

• Extracted setups: the projects, GPTs, Gems, instructions and memory it read, so you can review and edit them
• File copies: the content of the knowledge files it copied, so it can upload them or offer them as downloads
• Progress: which items were already moved, so an interrupted migration can resume without creating duplicates

chrome.storage.local:

• Preferences: the platforms you used last
• Saved Gemini memories: the IDs Gemini returned for memories PortSmith created, so resuming a migration does not save them a second time. The IDs only, never the text.

What PortSmith sends over the network

PortSmith only talks to chatgpt.com, claude.ai and gemini.google.com, using your existing sessions, from the tabs of those sites. When Gemini is the target, knowledge files are uploaded from the Gemini tab to content-push.googleapis.com, the Google upload service Gemini's own page uses for files. It has no analytics, telemetry, crash reporting or advertising, and no servers of its own.

Permissions and why they are needed

Permission	Why it is needed
storage	Remember your last-used platforms, and the IDs of Gemini memories already saved, in chrome.storage.local.
sidePanel	Show the migration wizard in Chrome's side panel next to the assistant you are working with.
scripting	Run ChatGPT API requests inside the ChatGPT tab, click through ChatGPT and Claude pages when their APIs are unavailable, and add PortSmith's page scripts to tabs that were already open when it was installed or updated.

Site access:

Site	Why it is needed
https://chatgpt.com/*	Read your GPTs, projects, files, memory and custom instructions.
https://claude.ai/*	Read your Claude projects, memory and personal preferences, or create projects when Claude is the target.
https://gemini.google.com/*	Read your Gems, or create Gems when Gemini is the target.

Third-party services

None. PortSmith uses no analytics providers, advertising networks or outside APIs. The only services involved are the AI assistants you choose, under their own privacy policies.

Keeping and deleting your data

Data PortSmith saved stays in your browser until you delete it. You can:

• Click Delete the data PortSmith extracted at the end of a migration
• Click Delete saved data on PortSmith's first screen, which removes everything it saved
• Remove the extension, which deletes all of its storage

Projects and Gems that PortSmith created belong to your Claude or Gemini account. Delete them there if you no longer want them.

Children's privacy

PortSmith is not directed at children under 13. It is a productivity tool for people who already have accounts on these AI assistants.

Changes to this policy

Updates will be posted on this page with a new effective date.

Contact

Questions about this policy or PortSmith's data practices:
hekleiman@gmail.com