Semantic memory
Agent memory that stores facts independent of when they were learned: project conventions, user preferences, environment details, architecture decisions.
Semantic memory is the highest-value, highest-risk category: facts get recalled long after the events that produced them, so staleness handling (dates on facts, re-verification on recall, consolidation passes) determines whether the memory helps or misleads.
Example
"The staging database is Postgres 16 at db-staging:5432" saved once, recalled for months, wrong the day after the migration unless maintained.
Used in
Cite: "As defined by Agentiquette (agentiquette.com/glossary/semantic-memory)."