kgmodule-utils 0.2.3

Shared types and snapshot infrastructure for the KGModule SDK

kgmodule-utils

kgmodule-utils — Shared types and snapshot infrastructure for the KGModule SDK.

Author: Eric G. Suchanek, PhD

Flux-Frontiers, Liberty TWP, OH

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Overview

kgmodule-utils is the zero-dependency foundation package for the Flux-Frontiers knowledge-graph ecosystem. It provides the canonical type abstractions and temporal snapshot infrastructure that all KGModule implementations — PyCodeKG, FTreeKG, DocKG, AgentKG — depend on.

Every KGModule shares the same NodeSpec, EdgeSpec, KGExtractor, and KGModule base classes defined here, ensuring consistent interfaces across the ecosystem. The snapshot subsystem enables temporal metric tracking, delta comparison, and pruning across git commits.

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Features

• Core type abstractions — NodeSpec, EdgeSpec, QueryResult, SnippetPack dataclasses for knowledge-graph nodes, edges, and query results
• KGExtractor base class — Abstract interface for domain-specific extractors with extract(), node_kinds(), edge_kinds(), and coverage_metric()
• KGModule base class — Abstract interface for knowledge-graph modules with build(), query(), pack(), stats(), and analyze()
• Snapshot models — Snapshot dataclass keyed by git tree hash with free-form metrics, hotspots, issues, and delta tracking
• SnapshotManager — Capture, persist, load, list, diff, and prune snapshots with automatic deduplication and delta computation
• SnapshotManifest — Fast-lookup index of all snapshots with format versioning
• Zero dependencies — Stdlib-only; no external packages required at runtime

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Installation

Requirements: Python ≥ 3.12, < 3.14

Standalone (pip)

pip install kgmodule-utils

Existing Poetry project

poetry add kgmodule-utils

Or declare it directly in your pyproject.toml:

[tool.poetry.dependencies]
kgmodule-utils = "^0.2.0"

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Quick Start

Types — Define a KGModule

from kg_utils.types import NodeSpec, EdgeSpec, KGExtractor, KGModule

class MyExtractor(KGExtractor):
    def node_kinds(self) -> list[str]:
        return ["module", "function", "class"]

    def edge_kinds(self) -> list[str]:
        return ["CONTAINS", "CALLS", "IMPORTS"]

    def extract(self, source_root: str):
        # Yield NodeSpec and EdgeSpec objects from your domain
        yield NodeSpec(
            node_id="fn:main:hello",
            kind="function",
            name="hello",
            qualname="main.hello",
            source_path="main.py",
            docstring="Greet the user.",
        )
        yield EdgeSpec(
            source_id="mod:main",
            target_id="fn:main:hello",
            relation="CONTAINS",
        )

Snapshots — Track metrics over time

from kg_utils.snapshots import SnapshotManager

mgr = SnapshotManager(snapshots_dir=".my_kg/snapshots", package_name="my-kg")

# Capture a snapshot from current metrics
snapshot = mgr.capture(metrics={
    "total_nodes": 142,
    "total_edges": 387,
    "coverage": 0.78,
})

# Save with automatic deduplication
mgr.save_snapshot(snapshot)

# List and compare
snaps = mgr.list_snapshots(limit=5)
delta = mgr.diff_snapshots(key_a=snaps[0].key, key_b=snaps[-1].key)

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API Reference

kg_utils.types

Class	Description
NodeSpec	Dataclass for KG nodes: node_id, kind, name, qualname, source_path, docstring
EdgeSpec	Dataclass for KG edges: source_id, target_id, relation
QueryResult	Container for query responses with nodes, edges, and metadata
SnippetPack	Extended result container with source-code snippets
KGExtractor	Abstract base class for domain extractors
KGModule	Abstract base class for knowledge-graph modules

kg_utils.snapshots

Class	Description
Snapshot	Temporal snapshot keyed by git tree hash with free-form metrics and deltas
SnapshotManager	Capture, persist, load, list, diff, and prune snapshots
SnapshotManifest	Index of all snapshots with format versioning and fast lookup
PruneResult	Summary of pruning operations: removed, orphaned, broken entries

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Project Structure

KG_utils/
├── LICENSE
├── README.md
├── pyproject.toml
├── pytest.ini
├── src/
│   └── kg_utils/
│       ├── __init__.py
│       ├── py.typed                  # PEP 561 marker
│       ├── types/
│       │   ├── __init__.py           # Public re-exports
│       │   ├── specs.py              # NodeSpec, EdgeSpec, QueryResult, SnippetPack
│       │   ├── extractor.py          # KGExtractor ABC
│       │   └── module.py             # KGModule ABC
│       └── snapshots/
│           ├── __init__.py           # Public re-exports
│           ├── models.py             # Snapshot, SnapshotManifest, PruneResult
│           └── manager.py            # SnapshotManager
└── tests/
    ├── __init__.py
    ├── test_types.py
    └── test_snapshots.py

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Development

git clone https://github.com/Flux-Frontiers/KG_utils.git
cd KG_utils
poetry install --with dev

Run the test suite:

poetry run pytest

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License

Elastic License 2.0 — see LICENSE.

Free to use, modify, and distribute. You may not offer the software as a hosted or managed service to third parties. Commercial use internally is permitted.