The final document is only part of the record
A team can preserve a decision and still lose the reasoning behind it. Months later, someone knows what was chosen but cannot tell which constraints applied or what evidence made the alternative unattractive.
A useful decision record includes a date, an owner, the chosen outcome, and references to the sources that mattered. The references let a future reader distinguish the decision from the evidence supporting it.
Model a small reasoning trail
Start with three kinds of record: evidence, constraint, and decision. An evidence record might be a capacity review. A constraint may limit the first rollout cohort. The decision links those facts to the chosen plan.
Represent the meaning of each relationship explicitly. A document that supports a decision is not the same as a document that supersedes it. Direction and dates help the application retrieve the right trail.
Search for the question, then follow the sources
AI Search can find a relevant decision even when a person remembers only the issue. Graph retrieval can then expand into its supporting review, constraints, and linked alternatives.
The application can present that context as a readable trail with source links. It does not need to pretend that a model reconstructed intent from nothing; the useful evidence was preserved as part of the workflow.
Keep historical reasoning historical
An old constraint may no longer apply. Preserve when it was true and whether a later decision replaced the earlier one. This makes the retrieved context useful for revisiting a choice rather than merely defending it.
Try the interactive decision-memory example, then start with one recurring decision workflow in your team. A small model with well-maintained source references is more useful than a broad archive with no reliable connections.
Explore the next step
Continue with the interactive workflow. For the current setup and API contract, use the Polygres documentation.