Launch HN: Runtime (YC P26) – Sandboxed coding agents for the whole team

Runtime positions itself as a sandboxed coding agents platform built for team-wide use.

It lets you build environments loaded with your company's context, integrations, and guardrails, connecting everything from monorepos to microservices. You can install CLIs, APIs, services, and MCP servers via mise, npm, brew, github, and more, along with custom instructions, skills, and secrets.

At its core is a runtime environment that snapshots once and spins up every session in seconds.

It also offers specialized agents that can be invoked directly from Slack, Linear, GitHub, Jira, and more.

• An agent for incident analysis
• An agent for sales research
• A support ticket triage agent

These agents are designed to automatically handle investigation, PR creation, drafting replies, and posting results.

Collaboration features are also emphasized. Anyone—from engineering, support, sales, and beyond—can work alongside an agent, take over a session to collaborate in real time, and produce outcomes as PRs, deploys, messages, tickets, or reports.

On the operations side, it provides visibility into every agent session. Notably, it bundles together governance and cost control, including tool calls, file changes, cost tracking, per-user and per-team spend management, allowlists, and approval gates.

For usage, it supports browser, terminal, and API access, and states that external AI keys can also be used.