#1631: a malformed LLM chunk (a stray non-dict entry in edges/nodes/hyperedges)
crashed the AST+semantic merge and the semantic-cache write with
`AttributeError: 'list' object has no attribute 'get'`, discarding every
successful chunk and writing no graph.json. `_parse_llm_json` now sanitizes each
fragment at the single parse chokepoint (dict entries only; non-list values
coerced to []), protecting the cache writer, the adaptive-retry merge, and the
CLI merge in one place.
#1638: an unresolved bare npm import (`import colors from "tailwindcss/colors"`)
emitted an imports_from edge to the bare id `colors`, which build.py's
pre-migration alias index then remapped onto an unrelated local file of that
stem (backend/utils/colors.py) - a confident EXTRACTED cross-language phantom
edge, one per importing file. The external-import fallback now namespaces its
target with the `ref` prefix (the J-4 convention), so it can never collapse to a
local node id; the ref target has no node, so build drops it as an external
reference.
#1632: with a parallel LLM backend, extract_corpus_parallel merged chunk results
in completion order, so which network call returned first reordered nodes/edges
run-to-run even when the model returned identical content - churning graph.json.
Chunks are now merged in deterministic submission order after the pool drains
(matching the serial path); the progress callback still fires in completion
order. The model's own content variance is unchanged (irreducible).
Full suite: 2882 passed, 3 skipped. Validated end-to-end via a local wheel build
on a mixed TS+Python corpus: `explain colors.py` shows only the real importer,
and graph.json is byte-identical across repeated runs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
safishamsi
e2ef4ef3d1