# R04 — KNOWLEDGE GRAPH MATURITY REPORT

**Source:** `data/SKILLS_GRAPH.json` (R-02F, 2026-06-22)  
**Mutation:** NONE

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## Maturity Level Classification

### Level Definitions

| Level | Name | Criteria |
|---|---|---|
| LEVEL 0 | Content Library | Files exist; no structure |
| LEVEL 1 | Categorized Content Library | Files organized into categories |
| LEVEL 2 | Weak Knowledge Graph | Nodes defined; few or no edges |
| LEVEL 3 | Connected Knowledge Graph | Edges present; majority of nodes connected |
| LEVEL 4 | Operational Knowledge Graph | Edges + metadata + traversable; queryable |
| LEVEL 5 | Recommendation-Ready Knowledge Graph | Produces actionable learning paths; validated |

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## Evidence Evaluation

### LEVEL 0 — Content Library
✅ **SATISFIED**  
Evidence: 197 skill `.md` files committed across 8 categories.

### LEVEL 1 — Categorized Content Library
✅ **SATISFIED**  
Evidence: All 197 nodes have a `category` field. 8 of 17 categories enumerated. Category directories exist in repo (`skills/01-perception/`, `skills/02-reasoning/`, etc.).

### LEVEL 2 — Weak Knowledge Graph
✅ **PARTIALLY SATISFIED**  
Evidence for: Nodes formally defined in `SKILLS_GRAPH.json` with IDs, categories, and source paths. JSON schema version 2.0.0 is structured.  
Evidence against: Zero edges. Nodes have no relationships. 9 of 17 categories not yet enumerated.  
**Assessment:** The structure of a knowledge graph exists (schema, node IDs, categories). The connectivity of a knowledge graph does not exist (0 edges).  
This places the repository at **LEVEL 2 lower bound** — the skeleton exists but contains no relationships.

### LEVEL 3 — Connected Knowledge Graph
❌ **NOT SATISFIED**  
Evidence: 0 edges. No node is connected to any other node.

### LEVEL 4 — Operational Knowledge Graph
❌ **NOT SATISFIED**  
Evidence: No edges, no traversal possible, no graph queries possible.

### LEVEL 5 — Recommendation-Ready Knowledge Graph
❌ **NOT SATISFIED**  
Evidence: Cannot generate learning paths without edges.

---

## Final Classification

```
KNOWLEDGE GRAPH MATURITY LEVEL: 2 (lower bound)
Name: Weak Knowledge Graph
Status: Node schema complete for 8/17 categories.
        Zero edges committed.
        Cannot traverse, query, or recommend.
```

## Path to Level 3

Required:
1. Complete category enumeration (R-02G): 9 remaining categories
2. Edge extraction (R-05): extract REQUIRES/SUPPORTS/RELATED_TO edges from skill files
3. Edge validation: verify all edge targets resolve to real node IDs
4. Minimum connectivity: ≥60% of nodes must have degree ≥1

Estimated edges needed for Level 3: ~300–600 (based on 197+ nodes, average degree 3–6)
