What is geotessera copilot-instructions.md?

Project guidance for GeoTessera, a Python library that downloads, processes, exports, and visualizes numerical representations of Sentinel-1 and Sentinel-2 satellite images.

Use it when developing or testing GeoTessera features involving satellite embeddings, tile lookup, GeoTIFF or NPY export, GIS processing, or visualisation.

It explains how the library finds image tiles, handles downloads, checks file integrity, and works with geospatial data. This helps an agent follow the existing architecture and required Python version.

How ucam-eo/geotessera configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to ucam-eo/geotessera. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ucam-eo/geotessera/main/.github/copilot-instructions.md

Clone the repo

git clone --depth 1 https://github.com/ucam-eo/geotessera

Made for: GitHub Copilot.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ucam-eo/geotessera/copilot-instructions/github.svg)](https://agentmods.dev/instructions/ucam-eo/geotessera/copilot-instructions)

Your own site

<a href="https://agentmods.dev/instructions/ucam-eo/geotessera/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ucam-eo/geotessera/copilot-instructions/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/ucam-eo/geotessera/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/ucam-eo/geotessera/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,194 This file is loaded in full into every session.

When invoked 2,194 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.02194	$0.02194
Opus 5.5	$0.00878	$0.00878
Sonnet 5.5	$0.00439	$0.00439
Haiku 4.5	$0.00219	$0.00219

Measured 1mo ago against content hash 61e066a676d3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

geotessera copilot-instructions.md 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 1mo 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.

.github/copilot-instructions.md · 260 lines

How it starts

The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GitHub Copilot Instructions for GeoTessera

Project Overview

GeoTessera is a Python library for accessing and working with Tessera geospatial foundation model embeddings. The library provides tools to download, process, and visualize satellite imagery embeddings from Sentinel-1 and Sentinel-2 data at 10m resolution.

Core Architecture

Two-step workflow: Retrieve embeddings (numpy arrays) → Export to desired format (GeoTIFF/NPY)
Registry system: Parquet-based metadata registry for efficient tile lookup
0.1-degree grid: Tiles cover ~11km × 11km, named by center coordinates
Direct HTTP downloads: On-demand tile fetching with automatic cleanup
Hash verification: SHA256 checksums ensure data integrity by default

Technology Stack

Core Dependencies

Python: 3.12 or 3.13 required (requires-python = ">=3.12")
CLI Framework: typer with rich for interactive output
Geospatial: rasterio, geopandas, rioxarray for GIS operations
Data Processing: numpy, pandas, pyarrow (for Parquet registry)
Visualization: matplotlib, scikit-learn (PCA), scikit-image
Storage: zarr, xarray, dask for chunked data handling

Build System

Package Manager: Uses uv for dependency management (preferred) or pip
Configuration: pyproject.toml with setuptools backend
Lock File: uv.lock for reproducible builds
Test Frameworks: pytest for Python APIs and cram for CLI behavior
Linting: ruff for code quality

Coding Standards

Python Style

Follow PEP 8 conventions
Use type hints for function signatures (e.g., Optional[str], Path, etc.)
Use typing_extensions.Annotated for CLI argument annotations with typer
Prefer pathlib Path over string paths
Use f-strings for string formatting

Code Organization

geotessera/
├── __init__.py          # Package exports and version
├── core.py              # Main GeoTessera class
├── registry.py          # Parquet registry management
├── cli.py               # Main CLI commands
├── registry_cli.py      # Registry-specific CLI
├── store.py             # Zarr v3 store access (GeoTesseraZarr)
├── tiles.py             # Tile abstraction (GeoTIFF + NPY)
├── visualization.py     # Visualization functions
├── web.py              # Web map generation
├── country.py          # Country bounding box utilities
└── progress.py         # Progress tracking utilities

Read the full file on GitHub · 260 lines

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.

1mo ago Changed · +6 lines · +110 tokens per session 61e066a676d3
2mo ago First seen · 254 lines · 2,084 tokens per session scan A f6a35a3eb28d

Subscribe to this mod's changes

geotessera copilot-instructions.md is an instructions file published in the GitHub repository ucam-eo/geotessera (362 stars, last pushed 1mo ago), licensed MIT. It adds 2,194 tokens to every session, about $0.0088 per session on Opus 5.5. 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.

Scientific geospatial-data python-package

geotessera copilot-instructions.md next to 6 instructions from other repositories
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geotessera: Instructions file for GitHub Copilot