# Impact Analysis

> Analyze change impact using Ontoly dependency and dependent traversal. Use when asked what breaks if a symbol, service, route, package, or repository node changes or is removed.

- Skill: `0xsarwagya/impact-analysis` (Agent Skill, multi-file: 10 files)
- Install (CLI): `npx skillmds@latest add 0xsarwagya/impact-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/0xsarwagya/impact-analysis/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: AGPL-3.0-only
- Author: 0xsarwagya (https://skillmd.com/u/0xsarwagya)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/0xsarwagya/impact-analysis

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# Impact Analysis

Use this skill when the user asks for impact analysis using Ontoly evidence.

## Required Workflow

Follow [the shared Ontoly workflow](reference/workflow.md). Also read [graph evidence rules](reference/graph.md), [MCP usage](reference/mcp.md), [best practices](reference/best-practices.md), and [fallback rules](reference/fallbacks.md) when the task requires detail.

## Ontoly Capabilities

Use these capabilities first: `ImpactAnalysis`, `FindDependents`, `FindDependencies`, `FindNode`, `EvidencePack`.

Pass the user's concept phrase directly to Ontoly first, for example
`Plan Definition Resource`. Do not fan out manual spelling variants such as
camelCase, kebab-case, or snake_case. If Ontoly returns multiple matches or no
match, report that ambiguity or not-found result as graph evidence before using
a narrow file fallback.

## Output Contract

Return:

- answer or plan
- capabilities invoked
- graph evidence with node ids, edge types, source spans, and graph hash when available
- confidence: high, medium, or low
- fallback reason if repository files were inspected

## Boundaries

Do not implement compiler, query, MCP, SDK, or business logic in the skill. Do not search repository files until Ontoly cannot answer or evidence must be confirmed.

## Resources

- [Examples](examples.md)
- [Prompt template](templates/impact-analysis.md)
- [Capability notes](reference/capabilities.md)

## Learn more

- Documentation: https://ontoly.xyz/docs
- This skill on the web: https://ontoly.xyz/skills#impact-analysis
- All Ontoly Agent Skills: https://ontoly.xyz/skills
- Install via skills.sh: https://www.skills.sh/?q=0xsarwagya/ontoly