Pre-Execution Dry-Run Simulation

Safe Surgery on System Files · Backend-only · workstation, home

Backend-only

The catalog records this feature as backend-only rather than shipped: it has no surface of its own in the app. The limits below say what is missing.

Simulates file writes, service restarts, and tool calls before touching disk — preview the impact without the risk.

The simulation engine lets you preview the effects of a proposed action before committing. File writes show the resulting file content, service restarts show dependent services that would be affected, and command simulations show expected output patterns.

API endpoints (/api/settings/simulate/file-write, /command, /service-restart, /tool) evaluate proposed actions against safety guardrails and the blast radius calculator, producing an impact report without executing mutations.

Limits and invariants

Backend implementation is complete; no dedicated frontend visualizer exists yet — simulation results are currently only accessible via API.

Where this lives

• halbert_core/halbert_core/dashboard/routes/settings.py