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cccskills
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cost-burn

Track production session spending over time by grouping costs into configurable time windows. Compare the latest window with earlier spending averages, display the increase, and optionally return a failure exit code when it exceeds a chosen percentage.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

원문원문 설명 보기

Burn-rate trend over time with optional drift-alert exit code. Bins session spend into buckets, surfaces window-over-window delta, and can exit 1 when latest bucket exceeds prior mean by a configurable %. Distinct from `cost-trend` (benchmark drift); this tracks PRODUCTION spend trajectory.

ruvnet/ruflo
설치 방법 보기

이럴 때 유용합니다

  • Reviewing daily production spending
  • Comparing recent spending with historical averages
  • Adding spending acceleration alerts to CI
  • Changing reporting windows and lookback periods

포함된 파일(1)

  • SKILL.md3.2 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

Burn-rate trend observability. The fourth leg of the cost-tracker forward-cost stack:

QuestionSkill
"Have we crossed a threshold?" (reactive)cost-budget-check
"When will we cross a threshold?" (predictive)cost-projection
"Could we have spent less?" (comparative)cost-counterfactual
"Is daily burn ACCELERATING?" (trend)cost-burn ← this

Algorithm

Implementation: scripts/burn.mjs.

  1. Read all session-* records from cost-tracking namespace.
  2. Bin into --bucket duration windows (default 1d) over --lookback (default 14d).
  3. For each bucket: {n: sessions, spendUsd: sum(total_cost_usd)}.
  4. Compute delta = latest.spendUsd - mean(prior non-empty buckets).
  5. If --alert-on-acceleration-pct N is set: exit 1 when deltaPct > N.

Smoke transcript (5 days @ $0.10/day, today $0.50 — 400% acceleration)

| Latest bucket spend | $0.500000 (1 sessions) |
| Prior bucket mean | $0.100000 (4 non-empty buckets) |
| **Delta (latest vs prior mean)** | **+$0.400000 (400.00%)** |

# | Window                              | Sessions | Spend
0 | 2026-06-15 14:16 → 2026-06-16 14:16 | 1        | $0.500000
1 | 2026-06-14 14:16 → 2026-06-15 14:16 | 0        | $0.000000
2 | 2026-06-13 14:16 → 2026-06-14 14:16 | 1        | $0.100000
3 | 2026-06-12 14:16 → 2026-06-13 14:16 | 1        | $0.100000
...

Drift alert exit code

$ cost burn --bucket 1d --lookback 7d --alert-on-acceleration-pct 50 ⚠ ALERT: latest bucket $0.500000 is 400.0% above prior mean $0.100000 (threshold +50%) exit 1

$ cost burn --bucket 1d --lookback 7d --alert-on-acceleration-pct 500 ✓ latest bucket within +500% of prior mean (actual delta: 400.0%) — OK exit 0

CI integration

# Fail the build if today's spend accelerated > 100% over the weekly mean
cost burn --bucket 1d --lookback 7d --alert-on-acceleration-pct 100 || alert-oncall

The alert is independent of budget — it triggers on rate ACCELERATION even when total spend is well under budget. Catches "we shipped a hot loop that burns 10× normal" before the budget alarm goes off.

Distinct from cost-trend

SkillData sourceQuestion
cost-trenddocs/benchmarks/runs/*.json"Is the benchmark drifting (win rate, latency)?"
cost-burncost-tracking namespace"Is production spend accelerating?"

Both useful; they answer different questions on different data.

Edge cases

  • Sparse history (no prior non-empty buckets): alert is SKIPPED with a reason string, exit 0. Operators don't get spurious alerts on cold-start.
  • Prior buckets all $0 but latest > $0: delta is Infinity/null in JSON, marked new in the table. No alert fires (no baseline to compare against).
  • --bucket > --lookback: hard error, exit 2.

리뷰

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