Context

An episode is one short text. Its context holds earlier texts of the same thread, so the model can tell what the text refers to:

{"source_id": "m2", "text": "It is leaking again.",
 "context": [{"source_id": "m1", "text": "Press S-7 was serviced on Monday."}]}

The model reads the context; the cast records only what the episode's own text states. "It" in m2 can become a mention of press S-7, and an edge from m2's note to it, but nothing m1 alone says is written.

The one thing context may supply is a key: the identity value (id: or alt id:) of an entity the text refers to. Its grounding then has in_context set to the context item's source_id, and its offsets point into that item's text. Any other quote found only in context is a quote_not_found finding.

Context is shown to the model as data, like the text, and counts towards LPGCAST_MAX_EPISODE_TOKENS. LPGCast does not assemble it: the caller chooses the earlier texts, and should keep them few and recent.