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at GitHub Continuous Delivery ! !

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How good are you at solving a problem?

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It wasn’t always like this, you know…

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How good are you at solving a problem?

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First attempts at solving a problem

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Slow

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Error-prone

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Decent chance of failure

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But there’s no way you’re getting to

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Without a little

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The good news is

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Your solution can get better over time.

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Working solution Better Solution Good solution Great solution

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“Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.” http://agilemanifesto.org/principles.html Principles behind the Agile Manifesto

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! ! We want to make it easier to work together than to work alone.

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Share work earlier, and more often

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Open a pull request to share your direction

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Roll out pieces of a system incrementally

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Build a demo of the feature Ship it to staff Get feedback Ship it to all users

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Feature flags/toggles

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class ApplicationController < ActionController::Base! ! def conversation_locking_enabled?! current_user && current_user.conversation_locking_enabled?! end! helper_method :conversation_locking_enabled?! ! end!

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<% if logged_in? && && current_user.conversation_locking_enabled? && issue.repository.writable_by?(current_user) %>! <%! type = issue.pull_request? ? "pull request" : "issue"! verb = issue.locked? ? "unlock" : "lock"! next_state = (verb == "unlock" ? "lock" : "unlock")! %>! ! ! <% end %>!

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class User! module FeatureFlagMethods! ! def preview_features?! GitHub.preview_features_enabled? && staff?! end! ! # Issue locking! def conversation_locking_enabled?! preview_features?! end! ! end! end!

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Build a demo of the feature Ship it to staff Get feedback Ship it to all users

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Utilize feedback loops at each step

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Tools that help you progress, and see progress ‣Version control ‣Automated test suite ‣Continuous integration ‣Group chat and ChatOps ‣Staging, QA, Production-like environments ‣Exception tracking ‣Metrics collection

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Keep risk low and innovation high

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Build a demo of the feature Ship it to staff Get feedback Ship it to all users

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! The End

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! @shayfrendt