docs(memory): add naming and maintenance guidance

AGENTS.md

@@ -34,6 +34,7 @@ You wake up fresh each session. These files are your continuity:
 - **Daily notes:** `memory/YYYY-MM-DD.md` (create `memory/` if needed) — raw logs of what happened
 - **Long-term:** `MEMORY.md` — your curated memories, like a human's long-term memory
 - **Named notes:** reserve separate memory files for long-lived plans, references, or investigations that truly need their own home; otherwise prefer folding notes back into the daily file
+- **When a named note is justified:** create one when the topic will likely span multiple sessions, accumulate evidence over time, or be reused as a reference. If it was just one conversation or one fix, prefer the daily note.
 - **Top-level `memory/` rule:** keep top-level mostly for daily notes. Put topical files in subfolders like `memory/ops/`, `memory/incidents/`, `memory/plans/`, `memory/references/`, or `memory/archive/`.
 
 Capture what matters. Decisions, context, things to remember. Skip the secrets unless asked to keep them.
@@ -287,6 +288,12 @@ You are free to edit `HEARTBEAT.md` with a short checklist or reminders. Keep it
 
 ### 🔄 Memory Maintenance (During Heartbeats)
 
+Light weekly checklist:
+- skim the last few daily notes
+- promote any durable truths into `MEMORY.md`
+- move obvious topical notes into `ops/`, `incidents/`, `plans/`, or `references/`
+- archive low-value clutter if top-level `memory/` is getting noisy
+
 Periodically (every few days), use a heartbeat to:
 
 1. Read through recent `memory/YYYY-MM-DD.md` files

memory/2026-03-11.md

@@ -42,3 +42,4 @@
 - Be more disciplined about using the daily note as the default inbox and promoting only durable truths into `MEMORY.md`.
 - Avoid adding new one-off memory files unless the topic is truly long-lived.
 - Keep top-level `memory/` mostly reserved for daily notes; use subfolders for topical material.
+- Use a light weekly memory-maintenance pass during heartbeats instead of waiting for clutter to build up.

memory/README.md

@@ -47,6 +47,16 @@ When in doubt:
 2. later promote durable truths into `../MEMORY.md`
 3. only create a named note when the topic genuinely needs a long-lived home
 
+Create a named note when:
+- the topic will span multiple sessions
+- it needs to collect evidence, commands, or findings over time
+- it is likely to be reused as a reference later
+
+Prefer the daily note when:
+- it was a one-off conversation
+- it was a tiny fix or validation
+- the note would otherwise become a small orphan file
+
 ## Cleanup guidance
 
 If top-level `memory/` starts filling with non-daily files again: