pce-graph

name	pce-graph
context	fork
description	Knowledge graph operations skill for pce-memory. Create, query, and visualize entities and relations. Triggered by: 'create entity', 'graph relation', 'query knowledge graph', 'map dependencies'.
argument-hint	[entity|relation|query] [args...]
allowed-tools	mcp__pce-memory__pce_memory_upsert_entity, mcp__pce-memory__pce_memory_upsert_relation, mcp__pce-memory__pce_memory_query_entity, mcp__pce-memory__pce_memory_query_relation, mcp__pce-memory__pce_memory_state

PCE Graph - Knowledge Graph Operations

Operate on the pce-memory knowledge graph (entities and relations).

Argument Parsing

Parse $ARGUMENTS:

• entity [name] [type] → Create/search entity
• relation [from] [to] [type] → Create relation
• query [pattern] → Search graph
• No arguments → Interactive guide

Entity Operations

Creating Entities

Register important codebase components as entities.

pce_memory_upsert_entity({
  id: "entity-unique-id",
  type: "component|module|api|database|service|concept",
  name: "Display name",
  properties: { ... }  // Optional additional info
})

Entity Type Guide

See entity-relation-patterns.md.

Type	Purpose	Examples
component	Software component	AuthService, UserController
module	Module/package	pce-boundary, pce-embeddings
api	API endpoint	POST /api/claims
database	Data store	DuckDB, Redis
service	External service	OpenAI API, GitHub
concept	Concept/pattern	State Machine, CRDT

Querying Entities

pce_memory_query_entity({
  type: "component",     // Filter by type
  name_pattern: "Auth*"  // Filter by name pattern
})

Relation Operations

Creating Relations

Register relationships between entities.

pce_memory_upsert_relation({
  from_id: "entity-a",
  to_id: "entity-b",
  relation_type: "depends_on|implements|contains|calls|stores_in",
  properties: { ... }
})

Relation Type Guide

Type	Meaning	Example
depends_on	Dependency	AuthService depends_on JWTLibrary
implements	Implementation	UserController implements IUserAPI
contains	Containment	CoreModule contains StateManager
calls	Invocation	Handler calls Repository
stores_in	Persistence target	ClaimStore stores_in DuckDB

Querying Relations

pce_memory_query_relation({
  from_id: "entity-a",        // Filter by source
  relation_type: "depends_on" // Filter by type
})

Typical Workflows

Dependency Mapping

1. Register key components as entities
2. Register inter-component dependencies as relations
3. Visualize dependency tree with query_relation

Architecture Recording

1. Register layers/modules as entities
2. Register contains/implements relations
3. Link design decisions (claims via upsert) to entities