Source-polymorphic ingest(source) primitive: extracts content faithfully
from a directory/file/url/llm-query/structured-primitive-set/stream,
decomposes it into a discrete multi-node graph manifold (nodes + internal
edges, never a single blob), and merges it into the engram geometry with
dedup (search + exact/cosine match), provenance, grounding-level, and
stewardship-class tagging from the moment of entry.
Pure HTTP client of the engram server (links only el_runtime.c, never
el_seed.c/the engine directly). Tested against a live nsbx sandbox engram
clone (127.0.0.1:8903) with real writes confirmed via /api/stats
(node_count 3201 / edge_count 6601).
Excludes ingest/build/ — local compiler scratch output (binaries, .c
codegen, .err logs), not source.