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San Francisco
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Launch Week v2 is done. Five days, five features.
We released production-ready updates that enable AI agents to work more reliably and effectively at scale.
Everything we shipped:
Day 1: Profiles
On Monday, we launched Profiles - persistent browser identities for your agents.
Before Profiles, every Steel session started fresh. Your agent would log in, complete a task, and when the session ended, everything was forgotten. Cookies cleared. Auth tokens gone.
Now your agents maintain persistent browser identities across sessions. A Profile stores cookies, extensions, credentials, localStorage, auth tokens, and fingerprints.
Your agent logs in once. Every subsequent session picks up with valid auth already in place.
Day 2: Mobile Mode
On Tuesday, we added Agent Logs to the Steel dashboard.
Pass deviceConfig: { device: "mobile" } when creating a session and the browser appears as a mobile device - user agent, viewport, touch capabilities, and browser characteristics all aligned.
Mobile sites present simpler DOMs, faster load times, and linear flows instead of nested menus. For AI agents, this simplification directly improves task completion rates and reduces token costs.
Day 3: Agent Logs
On Wednesday, we added Agent Logs to the Steel dashboard.
View every action your agent takes in a session—clicks, navigation, typing, scrolling—on a timeline next to the session viewer.
When your agent fails at a task, you can trace exactly where things went wrong. Click any event and the session viewer jumps to that point. You see what the agent saw, what it did, and what happened next.
No more watching entire session replays trying to spot the moment things broke.
Day 4: Headful Sessions
On Thursday, we launched Headful Sessions as the default for all Steel sessions.
We rebuilt the entire live view and replay experience from the ground up. We moved from Chrome's screencasting to WebRTC-based streaming at 25fps and replaced RRWeb with MP4 recordings.
Now all sessions run headful with OS-level streaming that captures everything on screen: native OS alerts, dropdowns, PDF viewers, and dialogs. Recordings show exactly what happened with 1:1 accuracy.
Day 5: Increased Concurrency Limits
On Friday, we doubled concurrency limits across all Steel Cloud plans.
New limits:
Hobby: 2 → 5 concurrent sessions
Starter: 5 → 10 concurrent sessions
Developer: 10 → 20 concurrent sessions
Pro/Startups: 50 → 100 concurrent sessions
Run more agents in parallel without hitting rate limits or implementing complex queuing systems.
That's a Wrap
Each of these features tackles a real problem we've seen teams struggle with: session state, debugging failures, performance bottlenecks, and scale constraints.
If you're building with any of these new features, we'd love to hear about it. Join us in Discord or tag us on X (Twitter) @steeldotdev.
Thanks for following along. Launch Week v3 coming soon.
All Systems Operational