# strata19.compute_change_impact
URL: /documentation/reference/tools/compute_change_impact



{/* GENERATED FILE — do not edit. Sources: src/mcp/facade/tool-projection-registry.ts (availability) + describe() in src/mcp/facade/facade-tools.ts (prose). Regenerate: pnpm exec tsx scripts/docs/site/generate-tool-reference.ts */}

## What it does [#what-it-does]

Blast radius for a file or symbol: what imports it, what it imports, and which drifted from spec — the FIRST call once a target is named, a basic in/out edge list.

## When to use it [#when-to-use-it]

**Use when:** "what breaks if I change this" · "what depends on this" · "what might break"

**Also use when:** before risky work, or any rename/signature change

## When not to use it [#when-not-to-use-it]

a trivial leaf edit with no importers; or you want a DEEPER follow-up on this target (test impact, breaking-change risk, component semantics) — use project\_intelligence

## Availability [#availability]

|           |                                                                                                                                                                                  |
| --------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Tier      | Everyday                                                                                                                                                                         |
| Lifecycle | Live                                                                                                                                                                             |
| Taught by | `strata19-change-impact`, `strata19-coordinate-multi-repo-work`, `strata19-execute-task`, `strata19-project-context`, `strata19-resolve-a-decision`, `strata19-review-readiness` |