The Change Log for the AI Tools You Depend On
AI tools change between releases, and the changes do not always arrive as obvious breaking changes. Backdiff records announced updates, observable differences, revised plan pages and policy edits in dated reports that help readers decide what needs to be checked before an established workflow is trusted again.
What a Model Version Bump Can Change in a Routine Prompt: Six Re-Tests Side by Side
A model version bump can change the structure, consistency, interpretation and formatting of an otherwise unchanged prompt.
Reading a Deprecation Notice: Dates, Endpoints and the Phrase 'No Longer Recommended'
An AI deprecation notice does not always mean that a feature or endpoint has stopped working.
A Free Tier Became a Trial: How to Document a Plan-Page Change Without Guessing
A free tier becoming a trial is a change that should be documented from the actual plan-page wording, not inferred from a headline or an account-specific message.
Keeping a Frozen Prompt Set: A Template in Spreadsheet and Plain-Text Versions
A frozen prompt set is a fixed collection of prompts, inputs, expected output characteristics and execution conditions used to compare an AI tool before and after an update.
How to Read a Feature List: Text Chat, Audio, Short Films and Follow Functions in a Companion Platform
An AI feature list documents what a platform says it offers, not necessarily how each feature behaves or which accounts can access it.
Output Length Drift: A Method for Checking Whether Summaries Got Shorter After an Update
Output length drift can be checked by comparing summaries generated from identical source material under documented conditions before and after an update.
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