change-impact-radar

change-impact-radar is a skill for Claude Code, Codex from DVNghiem/FlowDeck. It costs 29 tokens per session (433 once invoked), scanned A, original, MIT.

A pre-change analysis tool that predicts affected files, modules, APIs, database paths, and tests. An API is a defined way for software parts to communicate, while a database schema describes stored data and its structure.

In plain words
What is it for?
Use it before multi-file refactors, API or database changes, dependency upgrades, and authentication or security work. It creates an impact map with direct files, dependent files, contracts, and tests.
Why use it?
It shows the likely scope and risks of a change before any files are edited, so reviewers can catch missed dependencies or tests.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it before multi-file refactors, API or database changes, dependency upgrades, and authentication or security work. It creates an impact map with direct files, dependent files, contracts, and tests.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dvnghiem/flowdeck/change-impact-radar
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.

Any agent
npx skills add DVNghiem/FlowDeck --skill change-impact-radar
Clone the repo
git clone --depth 1 https://github.com/DVNghiem/FlowDeck

Made for: Claude Code, Codex.

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 change-impact-radar

README.md
[![agentmods](https://agentmods.dev/badge/skills/dvnghiem/flowdeck/change-impact-radar/github.svg)](https://agentmods.dev/skills/dvnghiem/flowdeck/change-impact-radar)
Your own site
<a href="https://agentmods.dev/skills/dvnghiem/flowdeck/change-impact-radar"><img src="https://agentmods.dev/badge/skills/dvnghiem/flowdeck/change-impact-radar/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for change-impact-radar

Your own site · 80×15
<a href="https://agentmods.dev/skills/dvnghiem/flowdeck/change-impact-radar"><img src="https://agentmods.dev/badge/skills/dvnghiem/flowdeck/change-impact-radar.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 433 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original 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 5.1 $0.00029 $0.00433
Opus 5 $0.00015 $0.00217
Sonnet 5 $0.00006 $0.00087
Haiku 4.5 $0.00003 $0.00043

Measured 9d ago against content hash 05f8038fffdb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

change-impact-radar 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 9d 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.

src/skills/change-impact-radar/SKILL.md · 63 lines

What it actually says

Change Impact Radar

Predicts blast surface before the AI touches a single file. Activate this skill by providing the intended change description to the agent.

When to Activate

Activate before:

  • Any multi-file refactor
  • API contract changes
  • Schema migrations
  • Dependency upgrades
  • Auth / security changes

Workflow

  1. Read ~/.fd-plan/<slug>/.codebase/ARCHITECTURE.md and ~/.fd-plan/<slug>/.codebase/STACK.md for system context
  2. Read ~/.fd-plan/<slug>/.codebase/MEMORY.json to trace the module dependency graph
  3. From the change description, identify all directly affected files
  4. Walk the dependency graph outward from affected files (depth ≤ 3 hops)
  5. Identify test files that cover the affected modules
  6. Flag any database schema, API contracts, or config changes
  7. Produce the impact map report

Impact Map Report Format

## Change Impact Report

### Direct Impact (files you will edit)
| File | Type | Risk |
|------|------|------|

### Indirect Impact (dependents, ≤3 hops)
| File | Dependency Chain | Risk |
|------|-----------------|------|

### API Contracts at Risk
- [contract name]: [why at risk]

### Tests to Run / Update
- [test file]: covers [module]

### Database / Config paths
- [path]: [what changes]

### Volatility Warnings
- [file]: marked as [stability level]

### Verdict: LOW | MEDIUM | HIGH impact

Guidance

  • If MEMORY.json does not exist, run /fd-task — its init step builds the graph.
  • If a file has no test coverage and is indirectly impacted, flag it as "coverage gap".
  • Never proceed with a HIGH impact change without human confirmation.
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. 9d ago First seen · 63 lines · 29 tokens per session scan A 05f8038fffdb

Subscribe to this mod's changes

change-impact-radar is a skill published in the GitHub repository DVNghiem/FlowDeck (25 stars, last pushed 20d ago), licensed MIT. It adds 29 tokens to every session and 433 once invoked, about $0.0001 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 2026-08-30.

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