Configuration

Proposals that involve moving away from global variables as the standard way of configuring core and extensions

• Configuration database (talk)
• Configuration database 2 (talk)
• Json Config pages in wiki (talk)

Debugging

• Structured logging (talk)

Storage services

• Storage service (talk)
• DataStore (talk)
• API roadmap (talk)

Linking

• New sites system (talk)
• Linker refactor (talk)

Media backend

• Refactor on File-FileRepo-MediaHandler (talk)

Parsing architecture

Proposals that involve big changes to how we think about parsing and wikitext

• Parsoid/Roadmap

Parser changes

Smaller changes to parsing

• New hook: ParserBeforePreprocess (talk)

Performance

• Performance standards for new features (talk) etherpad

Refactoring

• UserMailer refactor (talk)
• TitleValue (talk)

SQL abstraction

• SQL framework (talk)
• Abstract table definitions (talk)

CentralNotice

• CentralNotice Caching Overhaul - Frontend Proxy (talk)

HTML templating

Proposals that involve adding an abstraction layer for server-side and/or client-side HTML skin/user interface generation

• MVC framework (talk)
• OutputPage refactor (talk)
• HTML templating library (talk)
• Template engine (talk)
• Parsoid roadmap: DOM templating

Metadata

Interacts with: #Wikidata.

• Book management (talk)
• Image information (talk))
• Page metadata (talk)

Mobile

• Zero architecture (talk)

Parsed output access

• Content API (talk)
• Partial page caching (talk)
• Text extraction (talk)

Service-oriented architecture

• Services and narrow interfaces (talk)
• PHP Virtual REST Service (talk)

Thumbnail handling

• Simplify thumbnail cache (talk)
• Standardized thumbnails sizes (talk)

URLs

• URL shortener service for Wikimedia (talk)
• URL shortener (talk)
• Clean up URLs (talk)
• Drop actions in favour of page views and special pages (talk)

Wikidata

Interacts with: #Metadata.

• Wikidata API (talk)

Multimedia frontend

• More general frontend uploading tools (talk)

UI/UX: styling

• Grid system (talk)
• Vertical writing support (talk)
• Scoping site CSS (talk)
• Allow styling in templates (talk)

Backend code modularity frameworks

Proposals that involve organizing our backend code to be more modular

• MediaWiki libraries (talk)
• Third-party components (talk)
• Extension release management (talk)
• Distribution and deployment (talk)

Installation

• Opt-in site registration during installation (talk)
• Extension manager (talk)
• Extension management with Composer (talk)
• Extension release management (talk)

MediaWiki management

• Overthrow Bugzilla (talk)
• MediaWiki Foundation (talk)
• Bugzilla taxonomy (talk)
• MediaWiki.org Main Page tweaks (talk)

Release process

• Release notes automation (talk)
• Distribution and deployment (talk)

Software for/from third parties

• Third-party components (talk)
• Isolate custom jQuery libraries (talk)
• MediaWiki libraries (talk)

Crosswiki

Topic cluster, not really for implementation most likely.

• Regex-based blacklist (talk)
• Global scripts (talk)
• Structured data push notification support for recent changes (talk)
• Publishing the RecentChanges feed (talk)

General MediaWiki functionality

• Removing hit counters from MediaWiki core (talk)
• Update our code to use RDFa 1.1 instead of RDFa 1.0 (talk)
• Retained account data self-discovery (talk)
• Nonlinear versioning (talk)
• Localisation format (talk)
• Disable raw HTML on wikimediafoundation.org (talk)
• Scoped language converter (talk) (possible ideas beyond the Parsoid plans in bug 41716)

Page protection and deletion

• Itemise protection (talk)
• Page protection as a component (talk)
• Page deletion (talk)

Security

• Login security (talk)
• AuthStack (talk)
• Passwords (talk)

UI/UX: usability and discoverability

• Core user preferences (talk)
• Clickable section anchors (talk)

User customization/filterability

• Dismissable notices (talk)
• Support for user-specific page lists in core (talk)

Wiki tasks management

• Tickets (talk)
• Workflow (talk)