[Initiative] 🛡️ Maintenance, Support & Platform Health (Ongoing)

## Problem statement

GitHub Copilot for Azure depends on evolving Copilot clients, Azure MCP tools, Azure service APIs, package dependencies, CI systems, and marketplace infrastructure. Keeping the existing product functioning requires durable ownership and planned capacity. Without an ongoing initiative, compatibility work, support load, technical debt, and operational risks compete invisibly with feature delivery.

## Vision

The existing product remains healthy, supportable, secure, and release-ready as its dependencies and platforms evolve. Maintenance is planned rather than deferred, recurring work is automated where practical, and operational issues are resolved before they create broad user impact.

## Who this helps

- **Users** receive dependable releases and timely resolution of platform issues.
- **Support teams** get clear ownership, diagnostics, and escalation paths.
- **Skill and integration owners** can respond to upstream changes before compatibility breaks.
- **Maintainers** can reserve capacity for technical debt and operational health.

## Goals (in scope)

- Keep supported dependencies, runtimes, schemas, clients, and Azure interfaces current
- Maintain healthy CI, evaluation, release, marketplace, and synchronization pipelines
- Apply security patches and address critical operational risks within defined service levels
- Track deprecations and breaking upstream changes before they affect users
- Improve diagnostics, support playbooks, ownership, and escalation paths
- Reduce recurring toil through safe automation and lifecycle policies
- Maintain a prioritized backlog and explicit capacity for platform health

## Non-goals (out of scope)

- Delivering major net-new product capabilities
- Absorbing strategic product work that should have its own outcome and owner
- Supporting deprecated platforms indefinitely
- Using maintenance as an unprioritized catch-all for unrelated requests

## Success criteria

- [ ] Supported clients, runtimes, dependencies, and Azure interfaces have documented lifecycle ownership
- [ ] CI and release pipelines meet agreed reliability targets
- [ ] Critical security, dependency, and platform updates are completed within defined service levels
- [ ] Deprecations and breaking changes have migration plans before enforcement dates
- [ ] Recurring support issues produce diagnostics, documentation, automation, or targeted backlog items
- [ ] Maintenance capacity and debt are reviewed regularly and adjusted using operational signals

## Dependencies

- **Copilot client and Azure platform roadmaps**: Compatibility depends on timely upstream change information
- **Repository and release infrastructure**: Platform health depends on reliable CI, package, and marketplace services
- **Dependency owners**: Updates and deprecations may require coordinated migration work
- **Support and service owners**: Incident triage and escalation require clear cross-team ownership

No file, test, or entry point is named. Start by reviewing the success criteria and dependencies, then identify the relevant ownership, CI, release, support, and lifecycle work; done means the initiative has scoped, owned maintenance outcomes rather than an open-ended backlog.

Written by the indexing model from the issue text.