Stacks/Coding agent

Ramp Inspect background coding agent

Ramp Inspect is a company-wide background coding agent built on Modal Sandboxes. Each session gets a full local-like environment (Postgres, Redis, Temporal, RabbitMQ, OpenCode, a browser) that starts in seconds from a snapshot no more than 30 minutes old. The agent is reachable from Slack, a web IDE, and a Chrome extension, and Ramp reports it starts about half of merged PRs.

Use case

An internal background coding agent, used by engineers, product managers, and designers at Ramp, that the company says now starts roughly half of all merged pull requests across frontend and backend repos

Category

Coding agent

Team size

not stated

Orchestrator / framework

Each Inspect session runs in a Modal Sandbox with a full-stack development environment. Inside the sandbox, OpenCode is the coding agent, alongside a VS Code server, a web terminal, and a VNC stack with Chromium for visual verification. Outside the sandbox, Modal Functions on a 30-minute cron build fresh filesystem snapshots; Dicts manage session locks and image metadata; Queues route prompts from Slack, the web, or a Chrome extension into the right session. Sessions support multiplayer collaboration and child sessions for parallel work.

Memory

Filesystem snapshots, refreshed every 30 minutes (repos cloned, dependencies installed, initial builds run), are the session starting point. Session state is shared across clients so Slack, web, and the Chrome extension stay in sync. A longer-term agent memory product is not described.

Evals

not stated as a formal eval suite. Adoption is reported as the impact metric: within a couple of months, roughly half of merged PRs are started by Inspect, and over 80% of Inspect itself is now written by Inspect.

Observability

The setup is wired into Ramp's observability stack, including Sentry and Datadog, and into GitHub, Slack, and Buildkite. The original design goal also included deep integration with LaunchDarkly and Temporal so the agent could verify its own work.

Monthly cost

not stated

Models

not stated

Observability tools

SentryDatadog

Other tools

Modal SandboxesPostgresRedisTemporalRabbitMQVS Code serverVNC and ChromiumGitHubSlackBuildkiteLaunchDarklyChrome extension

Source

https://modal.com/blog/how-ramp-built-a-full-context-background-coding-agent-on-modal

Rahul Sengottuvelu and Zach Bruggeman (Ramp), as told in a Modal blog post by Greta Workman · Feb 18, 2026