Announcing the CoreStory + GitHub Copilot Agentic Bug Resolution Playbook

Turning Copilot into a disciplined bug-fixing partner

Our CoreStory + GitHub Copilot Agentic Bug Resolution Playbook is for teams that want Copilot to handle real bugs—not just propose patches—with a well-defined, test-first workflow. Instead of ad-hoc chat prompts, you embed a six-phase bug-resolution routine into Copilot via repository-level custom instructions.

The result is an agent that can investigate, write failing tests, implement minimal fixes, and validate them—without leaving your editor.

Why we built this for Copilot

Developers already lean on Copilot for “spot fixes,” but when production tickets hit, you need something closer to a process than a suggestion engine. By combining CoreStory’s understanding of intended behavior with Copilot’s editing capabilities, we can standardize how bugs are analyzed and resolved: always consult the spec, always write a failing test, always validate against both code and CoreStory before committing.

What this playbook helps you do

Using this playbook, Copilot:

• Pulls in issue or bug descriptions and opens a CoreStory investigation thread
• Queries CoreStory for invariants, architecture, and design intent
• Generates hypotheses and maps symptoms to likely code paths
• Writes a failing test that encodes the correct behavior
• Applies a minimal fix and re-runs tests to confirm behavior is restored

You get faster root-cause analysis, better fix quality, and fewer regressions because each fix is validated against the real specification, not just the current implementation.

What’s inside

The playbook includes:

• A six-phase bug-resolution workflow tailored to Copilot’s capabilities
• Repository-level instruction templates in .github/copilot-instructions.md
• Stepwise prompts for Chat, Inline Chat, and Code Actions
• Optional hand-offs to GitHub Issues and CI flows for evidence and enforcement

Who this is for

If your team is already using Copilot but still treats bug fixing as a purely manual process, this playbook is meant to bridge that gap—especially for platforms and QA leaders who want more consistent bug handling across teams.

How to get started

Get the playbook, copy the recommended instruction templates into a pilot repo, connect that repo to CoreStory, and route your next few bug tickets through the process. Use regression rate and time-to-root-cause as the key metrics to evaluate impact.