Trust & lifecycle plane / Tier 1 / Phase 1

Observability & FinOps

What happened — and what did it cost?

Make any task reconstructable end to end and attribute its cost: OpenTelemetry GenAI spans carrying trace, thread and task IDs, the acting identity, the policy decision and the token spend.

01 / WHAT THIS BOUNDARY OWNS
  • Distributed tracing across model calls, tool executions, retrieval, memory and agent runs
  • Correlation IDs that survive handoffs, queues and human approvals
  • Time-travel debugging: replay of prompts, delegations and memory state at failure
  • Quality and drift monitoring, including silent-failure detection
  • Token metering, budgets, chargeback and cost per successful task
  • Agent-versus-human attribution in every log
02 / INTEGRATION POINTS
03 / ENTERPRISE ACCOUNTABILITY

SRE / Observability platform, with FinOps

  • Head of SRE — accountable owner
  • Observability engineer — instrumentation and conventions
  • SRE — SLOs, alerting, on-call for agent estates
  • FinOps analyst — budgets, chargeback, unit economics
  • Data engineer — trace pipelines and retention

Architectural recommendation, not a research finding.

04 / WHAT DONE LOOKS LIKE
Instrument from the first pilot request. Retrofitting correlation IDs after the fact is the most common and most expensive omission in this whole composition.

Signals to watch

  • Trace completeness — share of tasks fully reconstructable
  • Share of incidents replayable from telemetry alone
  • Cost per successful task and budget burn rate
  • Agent-versus-human attribution coverage in logs
  • Mean time to detect a silent quality regression
05 / FAILURE MODES
  1. Classic APM is blind to the failures that matter here: infinite loops, hallucinated queries, silent quality decay
  2. Roughly 47% of deployed agents are actively monitored; about 68% of organisations cannot distinguish agent from human activity in their logs
  3. Missing correlation IDs, so an incident cannot be replayed or turned into a test
  4. Token spend discovered at the invoice rather than in the budget
06 / REFERENCE LANDSCAPE

Tool and standards snapshot · last reviewed approximately mid-2026

Open source

  • OpenTelemetry with GenAI semantic conventions
  • Langfuse
  • Arize Phoenix
  • OpenLLMetry
  • Grafana, Tempo, Loki, Prometheus
  • Jaeger
  • OpenCost for infrastructure cost

Managed

  • Datadog LLM Observability
  • MLflow Tracing
  • Cloud-native agent observability services

Standards

  • OpenTelemetry GenAI semantic conventions (around v1.41; agent-orchestration and MCP-tool spans still draft — design correlation IDs that survive the spec settling)
  • FOCUS cost schema
  • W3C Trace Context
ARCHITECTURE NOTE

OpenTelemetry is the data plane only: it records, it does not judge. Pair it with the evaluation harness or you will have perfect traces of a system nobody can say is working.