Blast Radius

Overview

The Blast Radius plugin groups plan changes by terraform module and calculates an impact score for each group. Impact is derived from the number of changes, risk levels, and whether destructive operations are involved. Modules are sorted highest-impact first, giving you a quick overview of which parts of your infrastructure are most affected.

Screenshot

Interactive (TUI)

Press B to open the Blast Radius view. It requires a completed plan to analyze.

Keybindings

Key	Action	Context
j / k	Navigate up/down	List
Enter / Space	Expand/collapse module changes	List
Esc	Go back	Always

Flow

Home ──B──→ Blast Radius (loading) ──→ Blast Radius (list)
                                          │
                                          ├── Enter/Space → Expand module changes
                                          └── Esc → Home

Impact Score Calculation

Score	Criteria
critical	Any change with critical risk
high	High risk or 3+ destructive operations
moderate	3+ changes or medium risk
minimal	1-2 changes, all low risk

Command Line (CLI)

Blast Radius is an analysis view within the TUI. It does not have a standalone CLI command.

Plan data with module groupings is available in structured form via:

tfui plan -project ./infra -json

The JSON output includes module information on each change for downstream grouping.

Equivalence

Goal	CLI	TUI
See module-level impact	tfui plan -json (group by module)	Press B
Identify highest-risk module	Parse JSON output by module	Sorted by impact score
Drill into module changes	tfui plan -json \| jq	B → expand module

Configuration

# tfui.hcl
plugin "blastradius" {
  enabled = true
}

Option	Type	Default	Description
enabled	bool	true	Enable/disable the plugin

Related

• Plan – flat list of all changes
• Risk Analysis – changes grouped by risk level
• Phantom Changes – phantom changes flagged in module view