Consolidate C4 diagram generation onto a single engine and expose it to
users via CLI and MCP, with a deterministic confidence gate and real
Knowledge-Graph-derived relationships.
- Consolidation (C1/C6): C4ModelService is the single render/analyze/store
engine; the bridge delegates and FAILS LOUD on a render error instead of
silently degrading. Duplicate inline generators removed.
- C2: real component relationships from the Knowledge Graph (AST import/call
edges) replace the naming heuristic; project-scoped via a new KG basePath
so repos outside cwd don't trip the path-traversal guard.
- C3: deterministic confidence gate (high/medium/low + reasons) on every
diagram — surfaces the detector's known limits instead of hiding them.
- C4/C5: `aqe code c4` CLI + `qe/code/c4` MCP tool (generate/search),
verified at MCP-CLI parity and through the protocol-server bridge.
- Search: generate persists embeddings (opt-in `enableC4Embeddings`, on for
MCP) so `qe/code/c4 search` returns hits in the standard flow.
- Fixed pre-existing lint in touched files (require->import, unused catches).
Docs: ADR-112 + docs/guides/c4-architecture-diagrams.md. tsc + lint clean;
C4 surface fully green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Dragan Spiridonov