Writing specs

Here is a checklist to help with writing specs.

• List the team who is assigned including QA, Designer, PM, and devs per platform.
• Add an objective - Generic description of what's being planned.
• Add the status of the spec: Pre-draft (not ready for review), Draft, In Development, or Complete which signals that it is landed on Nightly.
• How does the feature relate to high level objectives of the company.
• Non-goals of the spec.
• Target platforms that will be supported (e.g. Desktop, iOS, Android, or which sites it applies to etc.)
• Does clearing browsing data affect the thing being spec'ed?
• Does the thing being spec'ed change with different window types? E.g. Private window and Tor window?
• Will the feature be available on all channels? Is a feature flag needed so that work can land incrementally without reaching Release channel until it's ready?
• Are there any open questions? List them explicitly.
• What are the states of what you are designing?
• Which state is persistent and which state is not.
• Did you specify not only how things should be but what has to change from the current way?
• Can a time estimation be provided?
• Are things consistent with design guidelines that exist?
• Are acronyms being used defined somewhere?
• Are the strings defined that will be used? Remember to follow up after seeing real builds and get all string changes in by the time it is on Dev channel.
• Does your spec mention a specific version? In most cases this shouldn't be done, it's ok to drive for a specific version but most things should ride the trains.

If there are UI component

• Do you have mockups for every view and every state?
• Did you specify dimensions?
• Did you specify color values?
• Did you specify how it works responsively?
• Did you specify if these things are different per platform?
• If there are links, make sure a plan is in place to get the documentation created before the code lands.

If there are technical components

• Provide technical information when possible, work with a developer if needed.

Privacy / security

• Is there any kind of pings being made to a remote server?
• Is there any encryption being done?
• Is any information being hashed?
• Is there privacy or security sensitive information being persisted?
• Does anything make you think the security or privacy team might be interested in the work?
• Did you file a security / privacy review if any of the above are true.

Process considerations

• Post the specs for review on #specs.
• Callout major status changes when the draft enters a new status.
• Specs should be updated forever unless there is documentation that exists. Then a spec can be a diff on the documentation.
• Can the work be done in iterations or phases? If so you might want to indicate priority on things within the spec or consider splitting up the spec.
• Once work is about to begin, schedule a kick-off meeting to start the work.
• Push to make sure tests are defined.
• Is a QA plan defined?