```skill
---
name: timestamp
description: OS-agnostic ISO8601 timestamp generation for YAML files, logging, and any agent that needs the current time.
---

# Timestamp

## Detect OS

Check the user's OS from the environment info provided in the system prompt. Look for:
- `Windows` → use PowerShell
- `macOS` or `Linux` → use shell

## Get Current ISO8601 Timestamp

Run in terminal and capture output:

| OS | Command |
|----|---------|
| Windows | `Get-Date -Format "yyyy-MM-ddTHH:mm:ss.fffZ"` |
| macOS / Linux | `date -u +"%Y-%m-%dT%H:%M:%S.000Z"` |

## Usage

Wherever `{ISO8601}` appears in agent instructions, substitute with the actual output of the command above.

For multiple timestamps in quick succession (e.g., populating a YAML file), run the command once and reuse the value within the same step.
```