# io.github.savecharlie/almanac

> io.github.savecharlie/almanac — savecharlie-almanac. Use this tool when you need to calculate precise magnetic declination and celestial body positions for a given location and time. It solves problems related to accurate ephemeris and geomagnetic data calculation, eliminating the need for uncertain estimates. The tool takes location and time as inputs and outputs precise magnetic declination and sky positions for the sun, moon, and planets.

Canonical page: https://skillsregistry.net/skills/savecharlie-almanac  
JSON: https://api.skillsregistry.net/v1/skills/savecharlie-almanac

## Description

Provides deterministic computation of magnetic declination and sky positions (sun, moon, planets) for any location and time, enabling agents to get accurate ephemeris and geomagnetic data without hallucination.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-08-29

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** maps-location
- **Updated:** 2026-08-29

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/eeep9h4q3w)
- **Repository:** <https://github.com/savecharlie/almanac>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "savecharlie-almanac"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/savecharlie-almanac` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/savecharlie-almanac/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt