# Convergence Rationale (C1)

> For the complete documentation index, see [llms.txt](https://traderx.finos.org/llms.txt).

[Learning Guide — Observability with LGTM on Compose](https://traderx.finos.org/docs/learning/state-007-observability-lgtm-compose.md): purpose, walkthrough, and related learning states.

# Convergence Rationale (C1)

State `007-observability-lgtm-compose` is the C1 architecture convergence state.

Rationale:

*   It consolidates architecture hardening before functional expansion: durable data, robust messaging, and observability.
    
*   It creates a stable operational baseline for adding functional features without re-solving platform instrumentation.
    
*   It defines the demo-safe Grafana access convention: anonymous Viewer dashboards through ingress, state-scoped local admin credentials, and deterministic log collection defaults.
    
*   It is the recommended branching point for new functional states unless a narrower pedagogical target is explicitly required.
    
*   Issue #465 aligns inherited Java build context with Boot 4.0.8, Jackson 3.1.5, Springdoc 3.0.3, and Tomcat 11.0.26 so the observability overlay preserves the patched dependency baseline.
    

## Learning evidence at this checkpoint

At C1, the learning contract carries forward PostgreSQL persistence and NATS messaging while adding correlated telemetry. A learning partner asks for evidence from both the business records and the available signals, and probes the misconception that an empty dashboard proves no action occurred. The canonical `learning-contract.json` supplies objective mappings, diagnostic questions, graduated hints and assessment evidence for both human and agent-assisted study.