usage records missing 2026-09-19 -> 2026-09-21 23:16Z although metered; go/status usedMicroCents = base x Sigma(model usage/limit), not real dollars #50912

Description

Edited 2026-09-23: an earlier version of this issue treated the month meter's $42.9986 as real spend and reported ~$39 unaccounted / a suspected metering anomaly. That interpretation was wrong — the meter does not hold dollars (see section 2). What remains are two concrete bugs: missing usage records and a misleading meter unit. Amounts themselves reconcile; no billing anomaly.

1) Usage records are missing for the first ~2.7 days of the subscription

• Subscription access startsAt 2026-09-19T05:36:06Z, but usage records only start 2026-09-21T23:16:54Z (Legacy migration cutover).
• export?scope=range&range=all|30d|since, usage/summary, usage/models and usage/cost-by-day all return the same 445 rows summing $4.04109178; 9/19 and 9/20 have zero rows under every range.
• The meter does count that window: month meter = 71.664% of base, while the records themselves only account for Σ(usage_i/limit_i) = 18.24% (glm-5.3 $2.3015/$15 + ds-v4.1-flash $1.1314/$60 + glm-5.3-flash $0.6081/$60 + ds-v4-flash ≈ 0). So ~53pp of metered usage has no queryable record.
• Corroboration: local client ledgers (OpenCode session messages + Hermes session_model_usage, byte-identical to the pre-update snapshot — no pruning) show single-digit dollars of real spend in 2026-09-19T05:36Z → 2026-09-21T23:16:54Z at official opencode-go prices. Those rows exist locally but not in any usage endpoint.

2) go/status usedMicroCents is base × Σ(usage_i / limit_i), not real dollars

• week: usedMicroCents=3000000000 / 3000000000 = exactly $30.0000000, while real spend in that window is single-digit dollars. A dollar-sum meter essentially cannot emit a perfectly round $30.0000000; it fits $30 × min(Σ%, 1) (clamped at the limit).
• month: 4299858681 / 6000000000 = 71.664% matches the console's 72% and equals the same percentage-sum computed from my local ledger: 8.234/15 + 3.629/60 + 1.007/15 + 0.7246/60 = 68.9% (±3pp from window/estimate differences). Real month spend is $13.59, consistent with what I actually used (~≤ $15).
• So the amounts reconcile — no billing anomaly, and I withdraw the earlier ~$39 claim. But a microCents-denominated field that actually holds base × Σ% reads as currency (I initially read it as $43 of spend). Suggest documenting or renaming the unit, or exposing the percentage directly as the console does.

Context on the weekly lock: the pool locks when the percentage-sum across models reaches 100% of their per-model weekly limits (glm-5.3 alone was at ~91%), blocking all Go models with Go usage limit exceeded until 2026-09-28T00:00Z. That behavior appears intended — I am not disputing the lock, only the exactly-$30 dollar display that made it look like $30 of real spend.

Why it isn't a pricing-table issue:

• Recorded-era amounts match opencode-go prices on models.dev to 1e-7 (e.g. glm-5.3-flash: 2,354,002×$0.15 + 98,198×$0.5 + 6,863,616×$0.03 = $0.60810778 exactly; glm-5.3 and ds-v4.1-flash incl. peak are equally exact).
• Retail vs Go prices are nearly identical (only ds-v4.1-flash differs at 2x).
• No second account/credential (account tables empty, single key), no service/search fees (services=[] in records), single local database.
• request-logs returns 403 Forbidden for the service key (all Bearer variants), so pre-cutover requests cannot be self-serve checked — hence this report.

Request:

1. Backfill the missing usage records for 2026-09-19T05:36Z → 2026-09-21T23:16:54Z, or document why that window is intentionally not queryable.
2. Document/rename the usedMicroCents semantics (base × Σ(model usage / model limit)), since the value is not currency.

Plugins: none

OpenCode version: 2.0.12

Steps to reproduce:

1. Subscribe to Go (access startsAt 2026-09-19T05:36:06Z), use normally for ~2 days.
2. GET /console/api/go/status → month usedMicroCents=4299858681, week 3000000000/3000000000 (exactly at limit).
3. GET /console/api/usage/export?scope=range&range=30d with Accept: text/csv → 445 rows summing $4.04109178, earliest timestamp 2026-09-21T23:16:54Z; range=all, usage/summary and usage/cost-by-day return the same window only (starts at the cutover).
4. Compare: the meter's percentage-sum covers 9/19 → now, while no endpoint returns any record before 9/21 23:16Z; usedMicroCents matches base × Σ(usage_i/limit_i) rather than any dollar sum.

Screenshot and/or share link: console shows the same 72% / 100%; no share link (billing data)

Operating System: Windows 11 (10.0.26200.9457)

Terminal: OpenCode desktop app (TERM_PROGRAM not set)

Account: subscriber acc_01M2W22ED49X4JB3CM1EHR9MAV (email/API key intentionally omitted; available through a private channel if needed).