Blast radius

Know what breaks before you apply.

Stategraph stores your state as a dependency graph, so it can show every resource a change touches — ranked by how far away it is — before you run apply.

Distance-ranked Across the whole graph One command

Get Started See it run

Terraform shows what changes. Not what it breaks.

A plan lists the resources you changed. It won't tell you what depends on them. To find that out you read depends_on by hand, run terraform graph, pipe the output through graphviz, and squint at an SVG — manual inspection, every time, and only within a single state.

One command. Every dependent, ranked.

Point stategraph blast-radius at a resource and it traverses the graph for you — distance 0 is the change, distance 1 is everything directly affected.

stategraph — blast-radius

❯ stategraph blast-radius "module.scrum.data.google_compute_network.shared_network_dev"

DISTANCE   RESOURCE
   0       module.scrum.data.google_compute_network.shared_network_dev   ← the change
   1       module.scrum.google_redis_instance.agent_sandbox
   1       module.scrum.google_redis_instance.memorystore_jobs
   1       module.scrum.google_memcache_instance.memorystore
   1       module.scrum.google_redis_instance.memorystore_v2

distance 0 = the changed resource · distance 1 = directly affected dependents

From guesswork to risk you can see

// Terraform

1read depends_on by hand

2run terraform graph

3pipe to graphviz

4eyeball the SVG

→ guesswork before prod

// Stategraph

1one command

2every dependent, ranked by distance

3works across states

4answer in milliseconds

→ risk you can see

What you get

Distance metric

Every dependent comes with a number: 1 is directly affected, 2+ is indirectly downstream. Read risk at a glance instead of tracing edges.

Pre-apply risk assessment

See the full set of resources a change touches before you run apply — not after something downstream falls over in prod.

Interactive graph explorer

Prefer to click around? Explore the same dependency graph visually in the dependency graph explorer.

Spans state boundaries

Dependents in other states show up too. Blast radius doesn't stop at the edge of a single state file.

Find hub resources

A resource with a large blast radius is a hub — the things you change most carefully. Now they're easy to spot.

Built in, not bolted on

No graphviz, no extra plugin. Blast radius is part of the graph Stategraph already keeps.

Because state is a real graph, blast radius is just a traversal — not a separate tool to install, not an export you have to render. Ask the question, get the answer. Graph explorer docs →

See your blast radius

Stop rendering SVGs to guess what a change touches. Point Stategraph at a resource and get every dependent, ranked by distance, across your whole graph.

Get Started Read the Docs

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