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What is reelay-codegen?

doganulus/reelay-codegen — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2019-12-20

★ 6PythonAudience · developerComplexity · 4/5DormantSetup · hard

In one sentence

Reelay generates efficient C++ monitoring code from a YAML pattern description, detecting event sequences in real-time data streams like sensor readings.

Mindmap

mindmap
  root((reelay-codegen))
    What it does
      Detects data patterns
      Generates C++ code
      Monitors streams
    Tech stack
      Python
      C++
      YAML
    Use cases
      Sensor monitoring
      Anomaly detection
      Robotics events
    Audience
      Robotics engineers
      Systems developers
    Notable
      Temporal logic patterns
      Streams without storing data

Code map

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filefunction / class

What do people build with it?

USE CASE 1

Detect a specific sequence of sensor readings, like temperature and humidity thresholds happening in order.

USE CASE 2

Generate a C++ monitor for a robotics system that reacts to specific event sequences.

USE CASE 3

Track anomalies in manufacturing equipment data using declarative pattern rules instead of manual conditionals.

USE CASE 4

Monitor a continuous data stream from a message queue without storing the full history in memory.

What is it built with?

PythonC++YAML

How does it compare?

doganulus/reelay-codegenaclark4life/home-depot-crawlashishdevasia/ha-proton-drive-backup
Stars666
LanguagePythonPythonPython
Last pushed2019-12-202014-08-10—
MaintenanceDormantDormant—
Setup difficultyhardmoderatemoderate
Complexity4/52/52/5
Audiencedeveloperdeveloperops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · hard Time to first run · 1h+

Requires writing a YAML pattern spec and compiling the generated C++ monitor code.

The README does not specify license details.

Copy-paste prompts

Prompt 1
Write a reelay YAML pattern spec that detects 'event A then event B then event A again' in a data stream.
Prompt 2
Explain how to use reelay's temporal logic patterns to express timing-based rules for sensor data.
Prompt 3
Generate a reelay pattern for detecting when temperature drops below 50F followed by repeated high humidity readings.
Prompt 4
Show me how to integrate a reelay-generated C++ monitor into a real-time sensor processing pipeline.

Frequently asked questions

What is reelay-codegen?

Reelay generates efficient C++ monitoring code from a YAML pattern description, detecting event sequences in real-time data streams like sensor readings.

What language is reelay-codegen written in?

Mainly Python. The stack also includes Python, C++, YAML.

Is reelay-codegen actively maintained?

Dormant — no commits in 2+ years (last push 2019-12-20).

What license does reelay-codegen use?

The README does not specify license details.

How hard is reelay-codegen to set up?

Setup difficulty is rated hard, with roughly 1h+ to a first successful run.

Who is reelay-codegen for?

Mainly developer.

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