D322 — archived is a reserved status: closed journal entries are harvested, then leave the active surface

Decision. archived joins deprecated and superseded as a status the server knows (kb.IsRetired, closedPhase). An archived concept stays readable and linkable but is out of the default search (with a marked fallback when nothing live matches, and include_archived), out of read_cost, out of the atlas_overview structure graph and out of the map_oversize count. kb_review lists closed journal entries older than the journal's harvest_after (default 45 days) as harvest_candidate; the bundled kb-doctor skill carries their durable facts into live pages and archives them. The server also records when each concept was last handed to an agent (.cartographer/read-access.json), reported by kb_status as read_access. map_update now takes concept_types, ontology_mode and harvest_after.

Why. Closed journal entries kept the same search weight, graph weight and read cost forever; on a real KB seventy of them were archived by hand in one session. The server finds candidates deterministically (D14); which facts are durable is the agent's judgement (D305). map_update could not extend a strict map's type list, so a digest type could not be added after creation.

Alternatives rejected. Folding archived into the done synonym family: it is a lifecycle stage after done, not a vocabulary value a KB chooses. Excluding deprecated and superseded from read_cost too: they are few and meaningful, and changing that is a separate decision. A post-filter on search with an over-fetch: the backend's own filter drops archived hits before its cut, so the page is full and exact. A flush goroutine for the read log: a flush when a record finds the file older than five minutes needs no lifecycle; a crash loses at most that window of telemetry. A composite abandonment score now: there is no read data yet, so the signal comes first.

Consequences. Existing concepts already marked archived leave default search and read cost on upgrade. archived must stay out of ValueSynonymFamilies, and any new place that tests for "retired" calls kb.IsRetired. Navigation tools (graph_*, concept_list) do not record reads and still show archived concepts. A read-access entry missing means "unknown", never "never read". link_to_retired ignores a digest-typed linker, because the quarterly digest links what it archived.