memgraph-ingester-tool 0.1.2

Standalone query tools for Memgraph graphs created by memgraph-ingester

memgraph-ingester-tool

Standalone query tools for Memgraph knowledge graphs produced by memgraph-ingester.

This package is the single source of truth for all graph query and formatting logic. It is consumed two ways:

• as a library by memgraph-ingester-mcp, which exposes every method as an MCP tool;
• as a CLI (mgtools) for users who work with mgconsole or scripts and have no MCP client.

Any change to query logic here automatically reaches both audiences.

Installation

pip install memgraph-ingester-tool
# or
uv tool install memgraph-ingester-tool

Configuration

Settings come from environment variables. MEMGRAPH_TOOLS_* take priority; MEMGRAPH_INGESTER_MCP_* are accepted as a fallback so existing MCP configurations keep working.

Variable	Default	Description
MEMGRAPH_TOOLS_BOLT_URI	bolt://127.0.0.1:7687	Memgraph Bolt endpoint
MEMGRAPH_TOOLS_USERNAME	none	Bolt username
MEMGRAPH_TOOLS_PASSWORD	none	Bolt password
MEMGRAPH_TOOLS_DATABASE	none	Database name
MEMGRAPH_TOOLS_PROJECT	none	Default project (:Project anchor name)
MEMGRAPH_TOOLS_QUERY_TIMEOUT_SECONDS	30.0	Per-query timeout
MEMGRAPH_TOOLS_READ_ONLY	false	Disable write operations
MEMGRAPH_TOOLS_CODE_EMBEDDING_INDEX	code_chunk_embedding_v2	Code vector index base name
MEMGRAPH_TOOLS_MEMORY_EMBEDDING_INDEX	memory_chunk_embedding_v2	Memory vector index base name
MEMGRAPH_TOOLS_EMBEDDING_MODEL	default	Embedding model name
MEMGRAPH_TOOLS_EMBEDDING_DIMENSIONS	384	Embedding dimensions

Endpoints

Every endpoint below is exposed twice from the same implementation: as a public method on MemgraphTools and as an mgtools subcommand of the same name. The memgraph-ingester-mcp server registers the identical set as MCP tools.

Code graph endpoints

Endpoint	Description
server_status	Graph inventory, memory counts, and vector index status for a project.
code_orientation	Compact package/type/call overview; pass sections to keep it focused.
code_search	Hybrid CodeChunk search — vector + lexical signals fused by reciprocal rank; defaults to 5 non-test, deduped, primary/file-role hits with compact filters (kinds, path_prefixes, path_contains, owner_fragment, min_score).
code_text_search	Ranked lexical search over indexed chunk text/path/source ids for concrete-term discovery; returns termMatches.
code_discovery_context	Semantic discovery plus bounded exact/caller/callee/file context in one compact response; include_keys restores anchor sourceId/ragRole.
code_flow_context	Workflow discovery with semantic/lexical anchors, likely file outlines, related paths, and bounded nearby call edges; compact output uses edgeFiles refs, and detail="full" keeps wider inline expansion.
code_file_context	Deterministic file outlines with language, definition counts, and top symbols; include_index_stats restores chunk counts and RAG role counts.
code_lookup_type	Exact class/interface/annotation lookup by name or FQN; member expansion and test code are opt-in.
code_lookup_methods	Exact method lookup by signature fragment with source ranges; defaults to 10 compact owner/name/path rows.
code_lookup_field	Exact field/constant lookup by FQN or name fragment; compact owner/name/FQN/path rows.
code_lookup_file	Indexed file/resource lookup by path fragment with definition and RAG chunk counts.
code_callers	Methods that call matching callee signatures; compact, paginated, range-first rows.
code_callees	Callees invoked by matching caller signatures; compact, paginated, range-first rows.
code_method_context	Bundled exact method lookup plus caller and callee context for tracing one target.
code_impact	Refactor blast-radius for matching method signatures: target methods plus depth-1/depth-2 callers, test flags, and file/package boundary flags; compact output uses fileRefs, and view="files" returns a risk-ranked file list.
code_hot_paths	Hot-path candidates from type size, method size, fan-in, and fan-out; include_evidence=true adds source locations.
code_operation_hot_paths	Methods with many calls into operation-like sinks (run/query/write/read/save/delete…); accepts owner/path filters and caps sink examples unless include_all_sinks is set.
code_resource_risk_scan	Heuristic scan of query/config/resource files for risky patterns such as unbounded graph traversals, repeated subqueries, and per-row writes.
code_quality_stats	Graph-wide code quality and quantity metrics; defaults to non-test code.
code_hierarchy	Class ancestry, children, interfaces, and interface implementors for one FQN.
code_test_context	Failing-test/CI triage from a test name or class fragment to tests, test files, and production callees; compact output uses fileRefs.
raw_read_cypher	Read-only, project-scoped Cypher escape hatch for edge cases.

Memory endpoints

Endpoint	Description
memory_orientation	Rules plus open findings, tasks, questions, and risks; CLI defaults to compact output, and --full includes body fields.
memory_schema	Allowed memory types, upsert fields, controlled values, and CodeRef targets.
memory_search	MemoryChunk vector search with index-only hit metadata.
memory_get	Canonical memory node plus resolved CodeRefs.
memory_upsert	Create/update Decision, ADR, Rule, Context, Finding, Task, Risk, Question, or Idea.
memory_update_status	Lifecycle status update with controlled-value validation.
delete_memory	Delete one memory node plus its derived chunk and orphan CodeRefs.
memory_link_code_ref	Link a memory node to a resolved Code/Package/File/Class/Interface/Annotation/Method/Field target.
memory_refresh_chunk	Rebuild one derived MemoryChunk (optionally re-embedding it).
memory_refresh_embeddings	Refresh embeddings for selected MemoryChunk ids and stamp metadata.

Write operations (memory_upsert, memory_update_status, delete_memory, memory_link_code_ref, memory_refresh_chunk, memory_refresh_embeddings) are rejected when MEMGRAPH_TOOLS_READ_ONLY=true.

CLI usage

Every endpoint above is available as an mgtools subcommand:

# graph inventory, memory counts, vector indexes
mgtools server_status --project my-project

# hybrid vector + lexical code search
mgtools code_search "authentication filter" --project my-project --limit 5

# exact lookups
mgtools code_lookup_methods "GraphWriter.upsertFile" --project my-project
mgtools code_lookup_type --type-name GraphWriter --project my-project

# call graph and refactor impact
mgtools code_callers "GraphWriter.upsertFile" --project my-project
mgtools code_impact "upsertFile" --view files --project my-project

# memory tools
mgtools memory_orientation --project my-project --compact
mgtools memory_search "ingestion pipeline decisions" --project my-project

# read-only Cypher escape hatch (project filter required)
mgtools raw_read_cypher \
  "MATCH (f:File {project: \$project}) RETURN f.path LIMIT 10" \
  --project my-project

Run mgtools --help for the full command list and mgtools <command> --help for per-command options. python -m memgraph_ingester_tool works as well.

Library usage

from memgraph_ingester_tool import MemgraphTools, ToolConfig

tools = MemgraphTools(ToolConfig(default_project="my-project"))
status = tools.server_status()
hits = tools.code_search("authentication filter", limit=5)

MemgraphTools also accepts a pre-built client (anything implementing run(query, parameters, *, write=False)), which is how the MCP server reuses its own connection:

tools = MemgraphTools(config, client=my_client)

Output formats

Row-heavy commands default to table_json — a compact {cols: [...], rows: [...]} encoding. Pass --format json for plain objects. Absent keys mean null or empty, never an error.

Development

uv sync
uv run pytest
uv run ruff check .

License

MIT