Open source // LLM-ready sandboxing
Sandboxed
LLM work.
Reviewable PRs.
Sealant gives developers reproducible sandboxes with typed environment configuration, direct SSH and editor access, and strong isolation for LLM-driven work. Issue workflows keep prompts, tool calls, diffs, and pull request links in one place.
Built for developer workflows
Make setup and automation easier to reason about.
Most workflow pain shows up in three places: inconsistent environments, awkward handoff between tools, and automation that produces changes without enough review context.
- Environment definition
Define repository source, OS target, your harness of choice, packages, startup commands, dotfiles, and runtime options in one sandbox spec. Run LLMs inside isolated environments backed by runtimes such as gVisor, Kata, and other hardened sandbox boundaries.
- Direct access
Connect to the active sandbox over SSH or open it in VS Code or Cursor without recreating the environment locally.
- Workflow trace
Issue workflows keep prompts, tool calls, attempts, validation output, diffs, and pull request linkage attached to the same execution record.
Issue workflow reporting
Every LLM attempt stays inspectable.
Load issues from GitHub, GitLab, Linear, and similar systems, then run them through a tracked issue-to-PR workflow. When the pull request opens, the full execution record stays attached.
- Issue intake
Import work from GitHub, GitLab, Linear, and other issue systems instead of copying context across tools by hand.
- Prompt log
Store issue context, execution inputs, and prompt history before and during the run so the attempt can be audited later.
- Tool trace
Record tool calls, status transitions, validation output, and produced artifacts as the workflow runs.
- Diff context
Keep change summaries and per-file diffs tied to the workflow execution so reviewers can inspect what changed and how the attempt evolved.
- PR linkage
Publish pull requests with direct links back to the logged issue workflow so review stays cleaner, more repeatable, and easier to reason about.
Open Source
Own the execution layer.
Sealant is open source and self-hostable. Teams can inspect the control plane, adapt the integration points, and keep workflow infrastructure inside their own operational boundary.