PEX CLI Skill

Purpose

Knowledge graph-based exam preparation for CICM/ANZCA Primary Exams. Provides semantic search, prerequisite chains, learning paths, and LLM-inferred higher-order connections.

Quick Start

bash

# Semantic search for Learning Outcomes
pex search "shock physiology" --limit 10

# Show prerequisites for a topic
pex prereq "LO-cardio-001"

# Generate learning path for a concept
pex path "cardiovascular physiology"

# Find concepts that refine/specialize another
pex refine "hemodynamics"

# Graph statistics
pex stats

Commands

Search (Semantic)

bash

# Search Learning Outcomes (default)
pex search "septic shock management" --limit 5

# Search specific node types
pex search "dobutamine" --label Concept
pex search "cardiovascular" --label Topic
pex search "shock" --label SAQ

Prerequisite Chains

bash

# Show prerequisites for a Learning Outcome
pex prereq "LO-001"

# Get specific node by ID
pex get "LO-001"

Learning Paths

bash

# Generate learning path for a topic
pex path "renal physiology"

# Find LOs that refine/specialize another
pex refine "fluid balance"

# Find concepts implied by this concept
pex imply "cellular respiration"

Data Ingestion

bash

# Ingest from markdown files (LOs, SAQs)
pex ingest-md /path/to/markdown/

# Phase 6 LLM inference for higher-order connections
pex phase6-infer --model claude-3-5-sonnet

# Clear graph
pex clear

Graph Schema

cypher

(:LearningOutcome {id, name, description, domain, embedding})
(:SAQ {id, question, answer, topic, embedding})
(:Concept {id, name, category, embedding})
(:Topic {id, name, description, embedding})

(:LearningOutcome)-[:PREREQUISITE_OF]->(:LearningOutcome)
(:LearningOutcome)-[:COVERS]->(:Concept)
(:SAQ)-[:TESTS]->(:LearningOutcome)
(:Concept)-[:IMPLIES]->(:Concept)
(:LearningOutcome)-[:REFINES]->(:LearningOutcome)

Integration with Grounding Router

The PEX CLI integrates with the grounding-router as the Σₚₑₓ primitive:

yaml

Σₚₑₓ — Primary Exam Source

Sub-Primitives:
| Σₚ₁ | LO Search    | 0.95 | pex search "topic" --label LearningOutcome |
| Σₚ₂ | SAQ Search   | 0.90 | pex search "topic" --label SAQ |
| Σₚ₃ | Prerequisites| 0.85 | pex prereq "LO-id" |
| Σₚ₄ | Learning Path| 0.80 | pex path "concept" |

Dependencies

Service	Port	Required
FalkorDB	6379	Yes
Ollama	11434	For embeddings

Configuration

Location: ~/.pex/config.toml

toml

[graph]
host = "localhost"
port = 6379
graph_name = "pex"

[embeddings]
model = "qwen3:4b"
dimension = 4096

Related Skills

•limitless-cli - Personal context (correlate study sessions)
•grounding-router - Medical education grounding primitives
•saq - SAQ practice workflows