Layer 2

Semantic: Timeless facts

What is true independent of a specific date or workflow?

Canonical path	`semantic/`
Trigger	Definitions, durable facts, concept summaries, stable rules, vocabulary.
Stores	Short, reusable facts that answer future retrieval questions directly.
Avoid	Chronology, source dumps, procedural steps, and unresolved work-in-progress.
Lifecycle	Mutate when the fact changes; cite dated evidence when confidence matters.

Timeless fact layer

Semantic notes are compact answers to reusable questions. They should still be traceable, but they should not require the reader to reconstruct a meeting or source document to get the fact.

Good entry	Davai routes memory by future retrieval question, not by source format.
Poor entry	On May 3, Dave said the router misclassified a runbook as semantic.
Split rule	If the answer needs a date, use episodic. If it needs steps, use procedural. If it points to a long source, use reference.

Synthesized router F1 by trigger class. — Semantic is one trigger class in the router benchmark harness.

Good semantic note

---
type: semantic
topic: memory-routing
last_verified: 2026-05-05
---
A retrieval question is the question future Dave or an agent
will ask when deciding whether this memory should be loaded.

Poor semantic note

---
type: semantic
---
Meeting notes from launch planning:
- benchmark data still synthetic
- write link checker
- deploy later

This mixes episodic evidence, working tasks, and procedural follow-up. Decompose it at intake.