compact_prompt: Instructions file for Claude Code

CLAUDE.md

compact_prompt CLAUDE.md is an instructions file for Claude Code from gtkcyber/compact_prompt. It costs 2,476 tokens per session, scanned A, original, MIT.

A set of Claude Code instructions for CompactPrompt, a Python library that compresses prompts and other data using four research-based strategies. It documents commands, installation options, and the project structure.

In plain words
What is it for?
Use it when developing or testing CompactPrompt, including its compression strategies, optional dependencies, demonstrations, and linting setup.
Why use it?
It gives coding agents the context needed to work safely in the library and distinguish it from the separate research notebook.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions AGENTS.md.

This is gtkcyber/compact_prompt's own configuration. It tells Claude Code how to work on compact_prompt itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything compact_prompt configures →

Reuse

Borrowing it

Nothing to install: this file belongs to gtkcyber/compact_prompt. 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/gtkcyber/compact_prompt/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/gtkcyber/compact_prompt

Made for: Claude Code.

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Per session 2,476 This file is loaded in full into every session.
When invoked 2,476 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02476 $0.02476
Opus 5.5 $0.00990 $0.00990
Sonnet 5.5 $0.00495 $0.00495
Haiku 4.5 $0.00248 $0.00248

Measured 2mo ago against content hash 16f0c9501b22, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

compact_prompt CLAUDE.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 2mo 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.

CLAUDE.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

compactprompt is a Python library implementing the four prompt/data compression strategies from CompactPrompt: A Unified Pipeline for Prompt and Data Compression in LLM Workflows (Choi et al., 2025, arXiv:2510.18043). It is an independent, distilled reimplementation — not a port of the authors' reference notebook (which lives one directory up and is a 35-task, config-driven research harness; this package deliberately collapses that into a one-line API).

Commands

# Tests (full suite; optional-dep tests skip when their extras are absent)
pytest
pytest tests/test_ngram.py                  # one file
pytest tests/test_ngram.py::test_round_trip_is_lossless   # one test
pytest -rs                                  # show skip reasons

# Lint (CI gate; must stay at 10.00/10). CI runs over all tracked Python files:
pylint $(git ls-files '*.py')

# Install for development
pip install -e .                            # zero-dep core only
pip install -e '.[all,dev]'                 # everything + pytest, faithful to paper
python -m spacy download en_core_web_sm     # needed for phrase-level pruning

# Runnable tour of every strategy
python examples/quickstart.py

# CLI: review / compact markdown files and Claude Code skills (entry point in cli.py)
compactprompt review ./skills
compactprompt compact FILE.md --engine builtin            # dry run
compactprompt compact FILE.md --engine caveman --apply    # writes + .bak

# Interactive demo (Prompt + Files & Skills tabs)
streamlit run compactprompt_app.py

# Build the docs site (MkDocs); CI/Read the Docs build must stay clean
pip install -e '.[docs]' && mkdocs build --strict

CI runs two workflows (.github/workflows/): pylint.yml and tests.yml. The tests.yml core job installs the package with no extras across Python 3.9–3.13; the full job installs .[all,dev] + the spaCy model.

Read the full file on GitHub · 193 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.

  1. 2mo ago First seen · 193 lines · 2,476 tokens per session scan A 16f0c9501b22

Subscribe to this mod's changes

compact_prompt CLAUDE.md is an instructions file published in the GitHub repository gtkcyber/compact_prompt (0 stars, last pushed 14d ago), licensed MIT. It adds 2,476 tokens to every session, about $0.0099 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 2026-08-31.

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