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feat: brain get/stats/eval call internal/brain, not Python (#18 )

Read path is cgo like search. Control questions live in rank so CI can
test them without ladybug. Python bin/kb/{get,stats,eval} stays the
runner fallback.

2026-08-13 21:16:48 +01:00

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Design — facts, info, deduction

Two roots, one transaction

root — facts | info — is a column on every node and edge. Both roots live in the same Ladybug file and are written inside the same transaction (D12). Splitting is semantic, not physical:

facts — assertions backed by ≥2 independent sources (confidence: confirmed) or marked partial/hypothesis when the second source is missing.
info — narrative/descriptive leafs (how-tos, READMEs, notes). Searchable, never asserted as an answer.

ACID: Ladybug commits facts + info atomically; the audit can treat a snapshot as one consistent state.

Deduction search

bin/brain/search.go "question"
  1. facts root   — confirmed answers only   → return with evidence links
  2. info  root   — supporting narrative     → snippets, marked (not confirmed)
  3. web-search   — second independent source → upgrade hypothesis to confirmed
     (`web` block from `bin/web/search.go` when no facts hit; status `throttled`
     is not evidence of absence; `--no-web` / `--root` skip it)

--hop is not implemented yet (needs File/FROM_FILE edges). The flag is an error; it is not a graph walk.

Who / What / How / Where / When + evidence

Every assertion edge carries:

prop	meaning
who	subject/object persons, services, hosts
what	the associated subjects/objects (predicate)
how	methods used to read it (compose file? docker ps? ssh config?)
where	environment + filesystem path / host
when	timestamp / source_rev (git commit, mtime)
evidence	≥2 source refs (compose path, runtime container, config)
confidence	confirmed / partial / hypothesis
root	facts / info

Versioning — nothing is timeless

Content leafs: sha256, observed_at, source_rev, confidence. Stale = a file changed on disk (git HEAD/mtime) after its last observed source_rev. File-[:HAS_VERSION]->Commit-[:AUTHORED]->Person records the history of every content leaf. Commit records come from bin/git/import.go (go-git, no git binary); conversion prints leafs, brain write is bin/brain/index.go.

bin/facts/audit stale flags leafs whose observed revision is behind the corpus HEAD.

Sources (auto-pairing)

A: runtime state — docker ps (container running), ports actually bound
B: declared config — docker-compose.yml, ~/.ssh/config, homeserver.yaml
C: narrative — READMEs, AGENTS.md, docs

Confirmed = A×B or B×C agreement. Single source = hypothesis + (not confirmed). Conflicting pairings (≥2 yes vs ≥2 no) = hypothesis (OQ1 → v2 resolution).

Read path

bin/brain/get.go, stats.go, and eval.go call internal/brain with cgo (system_ladybug). They do not exec Python. Control questions for recall@5 live in internal/brain/rank so CI can test the table without libladybug. Python bin/kb/{get,stats,eval} remain for GitHub Actions until the runner has ladybug cgo. Index/write is still bin/kb/index.

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