impact-analysis

impact-analysis is a skill for Claude Code, Codex from ShiftinBits/constellation-claude. It costs 76 tokens per session (1,051 once invoked), scanned A, original, AGPL-3.0.

A code-change review step that examines which parts of a project may be affected by a non-trivial modification. It covers changes such as renaming, refactoring, deleting, moving, or restructuring code.

In plain words
What is it for?
Use it before substantial code changes or when assessing whether something is safe to remove, rename, or reorganize.
Why use it?
It helps reveal dependencies and likely breakage before editing code, especially when a change reaches beyond the file being modified.

Skill for Claude CodeCodex

Part of the constellation plugin — 2 skills, 6 commands, 3 hooks, 1 MCP server shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/shiftinbits/constellation-claude/impact-analysis
Any agent
npx skills add ShiftinBits/constellation-claude --skill impact-analysis
Clone the repo
git clone --depth 1 https://github.com/ShiftinBits/constellation-claude

Made for: Claude Code, Codex.

Or install constellation, the plugin that ships this one along with the rest of its 2 skills, 6 commands, 3 hooks, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for impact-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/shiftinbits/constellation-claude/impact-analysis.svg)](https://agentmods.dev/skills/shiftinbits/constellation-claude/impact-analysis)
Your own site
<a href="https://agentmods.dev/skills/shiftinbits/constellation-claude/impact-analysis"><img src="https://agentmods.dev/badge/skills/shiftinbits/constellation-claude/impact-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,051 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00076 $0.01051
Opus 5 $0.00038 $0.00526
Sonnet 5 $0.00015 $0.00210
Haiku 4.5 $0.00008 $0.00105

Measured 3d ago against content hash aa1f646c994a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

impact-analysis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/impact-analysis/SKILL.md · 103 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 103 lines · 76 tokens per session scan A aa1f646c994a

Subscribe to this mod's changes

impact-analysis is a skill published in the GitHub repository ShiftinBits/constellation-claude (2 stars, last pushed 27d ago), licensed AGPL-3.0. It adds 76 tokens to every session and 1,051 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories