Opt should remember where options were defined

Description

Contributor guide

Tech stack

python

Domain

developer experience

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

needs investigation

Prerequisites

PythonParlAI

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

The issue proposes that opt should remember where options were defined. To start, explore how options are currently defined and retrieved in ParlAI's opt.py and related files. Look at the existing opt system in `parlai/core/params.py` or `opt.py` to understand the current pattern. Consider how a 'source' attribute could be added to options without breaking existing usage. This would improve developer experience by making it easier to locate option definitions.