Example prompts
3 from the official listing
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Subtext Review this user session and provide an analysis of what happened
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Mention Subtext by name in your message, as the official examples do.
How to use Subtext in ChatGPT
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Open Subtext in ChatGPT’s plugin directory
Open Subtext’s page on chatgpt.com. Sign in to ChatGPT if you are not already.
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Install it from that page
Choose Install plugin there. It adds the Subtext app and 6 skills to ChatGPT.
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Mention Subtext in a chat
Start a new chat and name it in your request, for example: “Subtext, review this user session and provide an analysis of what happened”
Availability can depend on your ChatGPT plan, your region and, on work accounts, your admin’s settings.
What Subtext does
**Subtext is session replay built for agents instead of humans.**
Connect Subtext, and your Codex agents can open real production sessions and investigate them directly—no scrubbing a timeline, no video to watch.
Hand your agent a Subtext link from wherever it already connects—a Sentry issue, a Linear ticket, a support thread, a PR—and it uses Agentic Session Review to jump to the right moment, inspect screenshots and accessibility trees, diff DOM state, and read console and network activity to find the root cause. Then it files the fix or hands you the finding. You review the answer, not the replay.
What your agent gets:
- **Session tools it calls directly**: open a session, jump to a moment, inspect and compare state—purpose-built so agents traverse dense session data efficiently, with fewer tokens than pointing a general agent at raw replay.
- **Best-in-class capture from Fullstory**: Fullcapture behavior, pixel-perfect screenshots on demand, DOM diffs, and windowed console and network context.
- **Privacy built for production**: precision tools for agents to mask or exclude sensitive fields, plus agent-friendly DLP scanning tools over MCP.
- **Cost-effective**: Capture every session without sampling and never miss a critical user experience or bug report. Agents review the ones that matter most.
Works with Codex or any MCP-compatible agent. Code-first install, self-serve signup, generous free tier, usage-based pricing. Bring your own agent harness—Subtext is the session context it was missing.
From the official listing, written by Fullstory.
6 skills included
Packaged instructions ChatGPT follows for a specific task when Subtext is in use.
- Subtext privacy
- Subtext review
- Subtext session
- Subtext shared
- Subtext telemetry
- Subtext using subtext
What Subtext can access
The official listing names no Read or Write capability for Subtext. Check what it asks for when you add it, and connect only the accounts you want it to use.
Before you connect it
OpenAI’s plugin pages note that a connected plugin may receive relevant parts of your chats to answer a request, and that Fullstory’s own terms and privacy policy then cover that data. You can disconnect a plugin later in ChatGPT’s settings. Read the privacy policy (fullstory.com) and terms (subtext.fullstory.com).
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