parolo 0.2.1

A version-controlled prompt system for LLM workflows.

Parolo

A tiny, file-based prompt store with automatic versioning. Simple defaults, zero infra, backward compatible with the original Prompt class.

• Stores the current prompt in latest.txt
• Creates immutable versions under versions/vNNNN.txt (+ vNNNN.json metadata)
• Atomic writes so readers never see partial files
• Optional function API with Jinja2 rendering
• Works out of the box on a single machine or shared volume

from parolo import prompts, Prompt  # new + old

# New, namespaced API
prompts.save("greeting", "Hello {{name}}!")
print(prompts.render("greeting", name="Matthias"))

# Old class API (back-compat, str.format)
Prompt.create("legacy", "Hi {name}")
print(Prompt.format_prompt("legacy", name="Matthias"))

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Installation

uv pip install parolo

By default, parolo stores data in ~/.parolo/prompts/. Override with PAROLO_HOME=/path/to/dir.

Or in code: from parolo import set_base_dir; set_base_dir("/path/to/dir")

---

Listing & history

from parolo import prompts

# All prompts (quick stats)
print(prompts.list())
# → [{'name': 'email_refund', 'versions': 3, 'has_latest': True, 'latest_version': 'v0003', ...}, ...]

# All versions for one prompt (filenames)
print(prompts.versions("email_refund"))
# → ['v0001.txt', 'v0002.txt', 'v0003.txt']

# With metadata (timestamp, hash, size, detected Jinja variables)
print(prompts.versions("email_refund", with_meta=True))
# → [{'file':'v0003.txt','version':'v0003','timestamp':'...','hash':'...','size':123,'line_count':3,'jinja_variables':['customer','order_id']}, ...]

# Metadata for one version
print(prompts.meta("email_refund", "v0001"))

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Hot reload (agents)

Poll the file’s mtime token; reload when it changes.

import time
from parolo import token, get

name = "email_refund"
t = token(name)
tmpl = get(name)

while True:
    time.sleep(1.0)
    nt = token(name)
    if nt != t:
        t = nt
        tmpl = get(name)  # reload latest.txt
        # update your in-memory template

File Structure with Metadata

~/.parolo/prompts/
├── code_review/
│   ├── latest.txt
│   └── versions/
│       ├── v0001.txt           # Prompt content
│       ├── v0001.json          # Metadata (hash, timestamp, etc.)
│       ├── v0002.txt
│       └── v0002.json

Each .json file contains:

• hash: SHA-256 hash of the prompt content
• timestamp: ISO format creation timestamp
• version: Version identifier (e.g., "v0001")
• size: Size in bytes
• line_count: Number of lines
• previous_hash: Hash of the previous version
• metadata: Custom metadata provided by user

Features

• Automatic Versioning: Only creates new versions when content actually changes (using SHA-256 hashing)
• Rich Metadata: Stores timestamp, hash, size, and custom metadata with each version
• Version History: Git-like log functionality to view version history
• Latest File: Always maintains a latest.txt file with the current version
• Organized Storage: Clean directory structure for easy browsing
• Simple API: Intuitive class-based interface with static methods
• Flexible Configuration: Customizable storage location