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Add PerfCompare Maintainer Onboarding and Architecture Document - #2

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Add PerfCompare Maintainer Onboarding and Architecture Document#2
moijes12 wants to merge 1 commit into
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jules-13894888840673221427-668e0c8a

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@moijes12

@moijes12 moijes12 commented Aug 4, 2026

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Created a comprehensive onboarding documentation guide for transitioning a senior Treeherder engineer into a maintainer of PerfCompare, detailing historical context, database query structures, architecture, and a 4-week study plan.


PR created automatically by Jules for task 13894888840673221427 started by @moijes12

…ture guide

This commit introduces a comprehensive onboarding guide and architectural document at `docs/MAINTAINER_ONBOARDING.md` designed to assist and transition a senior Treeherder engineer into a maintainer of the mozilla/perfcompare repository.

Included Sections:
- Purpose of PerfCompare & Historical Context (solving high noise, statistical limitations, multi-modality, and subtest complexity)
- High-level System Context (Relationships with Treeherder and Taskcluster)
- Deep Dive of Backend Queries (including concrete Treeherder Django apps like treeherder.perfcompare, and key database tables like performance_signature, performance_datum, job, push, and repository, along with Taskcluster API calls)
- Low-level Technical Architecture (routing, Redux state slices, CSS-in-JS layout styles, caching, and client API components)
- Component Interaction Diagrams (Mermaid format covering search-and-compare flows and OAuth taskcluster trigger-hook sequences)
- A highly structured 4-week Study & Onboarding Plan mapping environment setup, math verification, OAuth integration, and release contributions.

Co-authored-by: Jules <jules@mozilla.com>
@google-labs-jules

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