GitHub's Copilot app technical preview is not just another chat surface. The important shift is that it brings agentic development back into GitHub-native context. Work can start from an issue, pull request, prompt, or previous session, which means the model does not have to leave the repository context to be useful.
Each session gets its own branch, files, conversation, and task state. That matters because engineering teams rarely work on one thing at a time. They handle triage, bug fixes, release notes, dependency updates, and routine cleanup in parallel. Isolating the sessions avoids context pollution and makes review much easier to follow.
GitHub also pulls steer, validate, and ship into one workflow. You can review the plan and diff, run commands in the integrated terminal, open a preview for validation, and then move straight into pull request review and merge. Agent Merge extends that by following through on review comments, fixing failing checks, and completing the merge once the conditions are met.
The broader takeaway is straightforward. Agentic coding becomes useful when it is embedded in repository context, checks, review, and the PR lifecycle. GitHub is effectively making "start from GitHub context" the new default for agent workflows.
