Workspace app
Cascade
Status: LiveAutomate recurring work across Hollow with a safe, step-by-step runner, including HollowScript for real logic.
Cascade is Hollow’s automation runner: an ordered list of steps that call your tools, run code, branch, and loop, on demand or on a schedule, with code execution sandboxed until it has almost no power left to abuse.
Cascade
Workspace app
Build
Steps, not a workflow diagram
A cascade is an ordered list of steps: call an external API, invoke a native Hollow tool, run code, branch on a condition, or loop over a list, each one declaring what happens next on success or failure, with retries where you need them.
- Five step types: HTTP, Hollow tool, code, condition, loop
- Each step declares what happens next on success or failure
- Optional retries with backoff on any step
- HTTP calls
- Hollow tools
- Code: JS, Python, HollowScript
- Conditions and loops
Run safely
Code that cannot reach further than it should
Code steps run in a separate, deliberately powerless service: no internet access, no stored credentials, a disposable sandbox per call. HTTP steps are independently guarded against reaching internal services, and high-risk tools are blocked from running unattended, no matter how a step is configured.
- Code steps run with no internet access and no ambient credentials
- A fresh, disposable sandbox for every single run
- High-risk tools are blocked from unattended execution, always
- No internet access
- No stored credentials
- A fresh sandbox per run
- Blocks internal requests
HollowScript
The canonical place to use HollowScript
HollowScript code steps run in-process, with no separate sandboxed process needed, because the language already refuses ambient access before a single statement runs. The step editor is the real HollowScript editor: live syntax highlighting and diagnostics, not a bundled lookalike.
- HollowScript steps run in-process, safely, by design
- The step editor uses HollowScript’s own highlighter and checker
- A HollowScript step can query your tasks directly
- Runs in-process
- Real syntax highlighting
- Live diagnostics
- Reads your tasks
What’s inside
Automation you do not have to babysit
- 01
Five step types
HTTP calls, Hollow tools, code, conditions, and loops, chained together.
- 02
Scheduling
Run a cascade on demand or on a schedule, with a lock that stops double-firing.
- 03
Powerless code sandbox
JavaScript and Python steps run with no internet access and no stored credentials.
- 04
HollowScript steps
A capability-safe language that runs in-process with a real editor, highlighting, and diagnostics.
- 05
Retries and branching
Per-step retries, conditions, and loops for real control flow.
- 06
Unattended safety
High-risk tools are always blocked from running without a human present.
Automation you do not have to babysit
Cascade is part of Hollow, invite only while we open access in stages.