historical-gis

historical-gis is a skill for Claude Code, Codex from xjtulyc/awesome-rosetta-skills. It costs 35 tokens per session (4,427 once invoked), scanned B, original, no licence file.

A toolkit for mapping how places and borders changed through history. It supports aligning old maps with modern coordinates, tracing boundaries, displaying changes over time, and estimating historical population across areas.

In plain words
What is it for?
Use it to georeference scanned maps, digitise historical territories, compare borders across periods, and map estimated population changes.
Why use it?
It helps combine historical maps and geographic data even when old sources use different boundaries or coordinate systems.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to georeference scanned maps, digitise historical territories, compare borders across periods, and map estimated population changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xjtulyc/awesome-rosetta-skills/historical-gis
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 xjtulyc/awesome-rosetta-skills --skill historical-gis
Clone the repo
git clone --depth 1 https://github.com/xjtulyc/awesome-rosetta-skills

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 historical-gis

README.md
[![agentmods](https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/historical-gis/github.svg)](https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/historical-gis)
Your own site
<a href="https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/historical-gis"><img src="https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/historical-gis/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 historical-gis

Your own site · 80×15
<a href="https://agentmods.dev/skills/xjtulyc/awesome-rosetta-skills/historical-gis"><img src="https://agentmods.dev/badge/skills/xjtulyc/awesome-rosetta-skills/historical-gis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,427 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00035 $0.04427
Opus 5 $0.00017 $0.02214
Sonnet 5 $0.00007 $0.00885
Haiku 4.5 $0.00003 $0.00443

Measured 9d ago against content hash 996e4d29f19c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

historical-gis scanned grade B with 2 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo apt-get install -y gdal-bin libgdal-dev python3-gdal

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

result = subprocess.run(cmd_translate, capture_output=True, text=True)
skills/13-history/historical-gis/SKILL.md · 526 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 9d ago First seen · 526 lines · 35 tokens per session scan B 996e4d29f19c

Subscribe to this mod's changes

historical-gis is a skill published in the GitHub repository xjtulyc/awesome-rosetta-skills (34 stars, last pushed 5mo ago), with no licence file. It adds 35 tokens to every session and 4,427 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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