Cost Export

Pulls every session-* and budget-config-* record from cost-tracking and emits in formats consumable by external observability systems. Without this, cost data lives only inside the AgentDB namespace; with it, the same data lights up dashboards.

When to use

• After any cost-track run, to refresh metrics for Grafana / Datadog / Prometheus.
• Cron-friendly via /loop 5m to keep external dashboards near-real-time.
• One-shot to a webhook for ad-hoc reporting (Slack, custom endpoint).

Steps

1. Pick a format — textfile collector for Prometheus / Grafana, or webhook POST for everything else:

   # Prometheus node_exporter textfile collector
   node plugins/ruflo-cost-tracker/scripts/export.mjs --prometheus /var/lib/node_exporter/textfile_collector/cost_tracker.prom
   
   # Webhook (POSTs JSON; add auth via env)
   EXPORT_WEBHOOK_HEADER='Authorization: Bearer $TOKEN' \
     node plugins/ruflo-cost-tracker/scripts/export.mjs --webhook https://hooks.example.com/cost-tracker
   
   # Stdout JSON (default if no flag)
   node plugins/ruflo-cost-tracker/scripts/export.mjs
   

2. Inspect what's emitted — Prometheus output includes:

   cost_tracker_total_usd                                    <gauge>
   cost_tracker_tier_total_usd{tier="opus|sonnet|haiku"}     <gauge>
   cost_tracker_session_total_usd{session="<8-char>"}        <gauge>
   cost_tracker_session_messages{session="<8-char>"}         <counter>
   cost_tracker_budget_usd                                   <gauge>  (if budget configured)
   cost_tracker_budget_utilization                           <gauge>  (spent / budget)
   

3. Webhook payload shape — the JSON the webhook receives matches the stdout JSON: { exportedAt, sessions: [...], budget, totalUsd, byTier }. Headers may be added via EXPORT_WEBHOOK_HEADER='K1: V1, K2: V2' (comma-separated).

Env overrides

Cross-references

• cost-track — produces the data this skill exports
• cost-budget-check — the same cost_tracker_budget_* metrics are alertable in Prometheus
• node_exporter textfile collector docs (Prometheus convention) — drop the .prom file in the collector directory and Prometheus picks it up