[Skill Bug]: cost related prompts are routed to skills other than azure-cost

[JasonYeMSFT]

Preflight Checklist

• I have installed the latest version of GitHub Copilot for Azure in VS Code.
• I have checked existing resources, including using the /help command in the chat window.
• I have searched for similar issues.

Repro Steps

This is a significant behavior change after upgrading from Copilot SDK from 0.3.x to 1.0.x.

There have been two patterns:

• Skill routed to azure-diagnostics
• Skill routed to service specific skill that relates to the service in the prompt

See test runs for azure-costs starting from 06/22/2026.

Example runs:

• https://agreeable-dune-0f718070f.1.azurestaticapps.net/nightly-runs.html?file=2026-06-20%2F27871296299%2Fazure-cost%2Fazure-cost_Storage_lifecycle_policy_optimization%2Fagent-metadata-2026-06-20T12-49-53-182Z.md
• https://agreeable-dune-0f718070f.1.azurestaticapps.net/nightly-runs.html?file=2026-06-20%2F27871296299%2Fazure-cost%2Fazure-cost_AKS_cost_spike_investigation%2Fagent-metadata-2026-06-20T12-45-21-412Z.md

Prompt

See test runs

Expected Result

We should either fix the routing, or make sure each skill has reference path to present the same content or point back to azure-costs skill.

Actual Result

See above

Attachments

No response

Regression?

behavior change after upgrading from Copilot SDK from 0.3.x to 1.0.x.

Additional Context

No response

[github-actions]

Thanks for filing this, @JasonYeMSFT! 🙏

I've applied the following labels:

• bug — this is clearly broken/regressed behavior after the SDK 0.3.x → 1.0.x upgrade
• azure-cost — the issue is specifically about the azure-cost skill's routing fidelity
• intent-detection + skill-invocation — the root cause appears to be in how cost-related prompts are routed/dispatched to skills

The team will investigate the routing regression to ensure cost-related prompts are reliably directed to the azure-cost skill rather than azure-diagnostics or service-specific skills.

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