# Check Deprecated Dependencies

> Check whether a dependency is deprecated across ecosystems (npm, pip, nuget) using a single normalized interface.

- Skill: `sasky80/check-deprecated-dependencies` (Agent Skill)
- Install (CLI): `npx skillmds@latest add sasky80/check-deprecated-dependencies`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sasky80/check-deprecated-dependencies/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: sasky80 (https://skillmd.com/u/sasky80)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/sasky80/check-deprecated-dependencies

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# Check Deprecated Dependencies

## Platform Note

- Clean-install path: use the Go command from `.github/tools/skills-go`.

## What it does

1. Accepts a single normalized input: `ecosystem`, `package`, optional `version`.
2. Routes to an ecosystem-specific adapter (`npm`, `pip`, or `nuget`).
3. Returns normalized JSON for consistent downstream review logic.

## Supported ecosystems

- `npm`
- `pip` (alias: `pypi`)
- `nuget`

## Arguments

| # | Name | Required | Description |
|---|------|----------|-------------|
| 1 | ecosystem | Yes | `npm`, `pip`/`pypi`, or `nuget` |
| 2 | package | Yes | Package name |
| 3 | version | No | Package version to inspect |

## Examples

```bash
go run ./.github/tools/skills-go/cmd/skills-go check-deprecated-dependencies pip requests
```

## Go implementation

- A Go implementation is available at `.github/tools/skills-go`.
- The Go command `check-deprecated-dependencies` returns the same normalized JSON contract.

## Output

Returns compact JSON:

```json
{
  "ecosystem": "npm",
  "package": "request",
  "version": "2.88.2",
  "deprecated": true,
  "message": "request has been deprecated...",
  "replacement": "undici"
}
```

Notes:
- `deprecated=true` indicates explicit registry/package metadata signals deprecation (or yanked/explicitly inactive indicators where applicable).
- `replacement` is best-effort and may be empty.