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fix(anthropic): rank Fable accounts by its share of the weekly limit - #8469
Claude now shows Fable as its own weekly meter, labelled "Up to 50% of your weekly limit". Both api.anthropic.com/api/oauth/usage and claude.ai's /api/organizations/<org>/usage return the cap in a new field:
limit_index points into the raw limits array, at the weekly_scoped Fable row. It is 1 on accounts whose response has no session row. Every live account checked (nine Team and Max seats) reported allowance_percent_of_weekly: 50.
OpenCodex ignored this field. It ranked Fable requests on the Fable meter's raw percent, and that percent is relative to Fable's own allowance. So an account at 60% Fable and 10% weekly, which has 20 weekly points left for Fable, ranked ahead of an account at 0% Fable and 70% weekly, which has 30.
anthropicUsageBuckets reads weekly_scoped_shares and attaches the allowance to the selected scoped row it indexes, as weeklyAllowancePercent on the Fable window. A share is ignored if it points at a shared or unselected row, is out of range or fractional, falls outside (0, 100], or conflicts with another share. The value comes from upstream and is never inferred from a plan.
Under the weekly and max-utilization pool windows, lowest-usage ranking uses anthropicModelRankPercent, which restates Fable on the weekly scale: 100 - allowance * (100 - fable%) / 100. Combined with the shared weekly percent, this ranks by real Fable headroom, min(allowance remaining, weekly remaining).
The default five-hour window has no five-hour tie-break, so its ranking keeps the raw Fable percent; otherwise a fresh seat's 50 would mask five-hour readings below 50. Auto-switch thresholds also keep the raw Fable percent, so a fresh Fable seat (which ranks at 50) does not trip a low fill-first threshold and rotate accounts. Exhaustion is unchanged, because both scales reach 100 together. Route-profile minQuotaHeadroom is also unchanged.
A passive 7d_oi header update keeps the allowance read by the last usage probe.
An inactive Fable row stays unpublished, as before.
Verification
Live reads on 2026-11-10: OpenCodex's own Anthropic OAuth accounts against /api/oauth/usage, and claude.ai's usage call through a signed-in browser. Both return weekly_scoped_shares with the shape above. Every account currently reports Fable at 0%, so the nonzero conversion follows the meter semantics (percent is relative to the allowance; used_percent_of_weekly is reported separately) rather than an observed nonzero pair.
New tests failed before the fix and pass after it: tests/providers/provider-anthropic-usage-windows.test.ts (47 pass; 3 behavior cases red on the old source) and tests/adapters/anthropic/anthropic-account-threshold.test.ts (weekly-window ranking, threshold stability and five-hour ordering; each red on the old source).
bun run typecheck, bun run structure:check and bun run privacy:scan pass.
bun run test:changed: 41626 pass, 108 skip, 7 fail. Two runs failed on different, unrelated tests, mostly 5-second timeouts under load. Every named failing file passes alone through bun scripts/test.ts, except tests/cli/cli-codex-cli-update-boundary.test.ts (npm-global install boundary), which fails the same way with the source change stashed.
NOT RUN: full bun run test (the changed-graph run already covers 41.7k tests across 1784 files); macOS/Windows lanes (batch dev dispatch per policy); GUI. The new field reaches the management API as part of the quota JSON, but the dashboard does not render a "50% of weekly" hint yet.
Checklist
Scope stays focused and avoids unrelated cleanup.
Docs or release notes were updated when needed. (structure/providers/anthropic-account-pool.md)
Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults.
Summary by CodeRabbit
New Features
Model-specific quota windows can now be compared on a shared weekly scale, improving account selection when models have different weekly allowances.
Quota displays and threshold checks continue to use each model’s own usage percentage; five-hour quota routing retains its existing ranking behavior.
Weekly allowance information is now supported when available from usage data.
Claude's usage endpoint now reports weekly_scoped_shares, naming by raw
limits index the share of the weekly limit a scoped family may consume
(Fable: "up to 50% of your weekly limit"). The Fable window now carries it
as weeklyAllowancePercent, and lowest-usage pool ranking restates Fable on
the weekly scale, so an account at 60% Fable with 20 weekly points left no
longer outranks one with 30. Auto-switch thresholds, exhaustion and route
headroom keep their existing meaning.
Anthropic scoped quota windows now retain upstream weekly allowances. The lowest-usage account picker uses weekly-equivalent usage for model-specific ranking, while threshold checks continue to use the family’s own usage percentage.
Selected scoped rows receive valid shares mapped by raw limits index. The allowance is carried into custom model windows and preserved when matching header updates omit it. Tests cover invalid and conflicting shares, inactive rows, and header merging.
The lowest-usage picker scores model-specific windows using their weekly-equivalent percentage. Other scoring continues to use the family percentage. Tests cover Fable ranking and fill-first threshold behavior.
lidge-jun/opencodex#8069: It adds the usage-window selector and bucket routing that this change extends with weekly allowances.
lidge-jun/opencodex#8088: It changes shared usage-window selection that supplies the weekly usage input used by this change’s ranking logic.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring Coverage
Docstring coverage is 55.56% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Title check
The title clearly summarizes the main change: ranking Anthropic Fable accounts by their share of the weekly limit.
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Full details: Docstring Coverage
Explanation
Docstring coverage is 55.56% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 9 functions across 8 files. (1 skipped: 1 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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Preserve five-hour ordering when applying the weekly allowance
With quotaWindow: "five-hour" (the default), converting a fresh Fable meter to 50 before taking Math.max masks all five-hour utilization below 50%. For example, when the active account reaches its switch threshold and the eligible replacements both have Fable usage 0%, allowance 50%, and weekly usage 0%, replacements at 49% and 1% five-hour usage now both score 50. pickLowestUsage disables its five-hour tie-break in this mode, so it retains whichever account appears first instead of choosing the 1% account as before. Keep the configured five-hour ordering meaningful, either by limiting the weekly-scale conversion to weekly ranking or by preserving the five-hour comparison when converted scores tie.
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Fixed in 3de1390: the weekly-scale conversion now applies only under the weekly and max-utilization windows, which break ties on five-hour usage. The default five-hour window keeps the raw Fable percent. A regression test (five-hour ranking keeps five-hour order for fresh Fable seats) fails on aaa4c4d and passes now.
Five-hour pool ranking has no five-hour tie-break, so the weekly-scale Fable figure (50 for a fresh seat) masked every lower five-hour reading. Apply the conversion only under the weekly and max-utilization windows.
Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.
Clarify the semantics of the weekly-equivalent formula for sub-100 percent values.
The formula at Line 37 is 100 - allowance * (100 - used) / 100. For allowance=50 and used=60, it returns 80. For allowance=50 and used=0, it returns 50. This matches the tests and the doc comment: the result is the weekly points already unavailable to this family.
An edge case needs a check. Line 37 returns percent unchanged when percent >= 100. That keeps exhaustion at 100. For percent just below 100, the result is 100 - allowance * epsilon / 100, which is close to 100. The result is continuous and monotonic, so ranking stays consistent. No defect found.
One residual gap: Line 35 treats an out-of-range allowance as absent and returns the raw percent. Accounts with a valid allowance and accounts without one are then compared on different scales. A raw 60 for an account without an allowance ranks better than 80 for an account with one. The documented behavior is "keeps its own percent", so this is intentional. Consider documenting the mixed-scale comparison in structure/providers/anthropic-account-pool.md.
45-62: Trivial · Maintainability & Code Quality · Low value
Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.
Verify that applyWeeklyShares handles a share that conflicts only after a bucket was already assigned.
When a first valid share sets weeklyAllowancePercent and a second differing share arrives, the code deletes the allowance and adds the bucket to conflicted. A third entry for the same bucket is skipped. This is correct.
One path needs a decision. Two identical shares for the same index pass without conflict. This is acceptable.
The toFiniteNumber call accepts numeric strings such as "50". The index check rejects strings. The inconsistency is minor. If upstream always sends numbers, tighten the allowance check with typeof raw === "number" to match the strict index handling and avoid silently accepting " 50 ".
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Inline comments:
Review comments at @src/providers/quota/anthropic-family-headers.ts:
- Around line 17-23: Update mergeAnthropicFamilyWindows so it carries forward a
previous weeklyAllowancePercent only for header-derived updates with
passiveObservedAt; probe-derived updates without an allowance must remain
without one. Add a regression test merging such a probe-derived window over a
previous window with an allowance and verify the result has no allowance.
---
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Summary
Claude now shows Fable as its own weekly meter, labelled "Up to 50% of your weekly limit". Both
api.anthropic.com/api/oauth/usageand claude.ai's/api/organizations/<org>/usagereturn the cap in a new field:limit_indexpoints into the rawlimitsarray, at theweekly_scopedFable row. It is 1 on accounts whose response has no session row. Every live account checked (nine Team and Max seats) reportedallowance_percent_of_weekly: 50.OpenCodex ignored this field. It ranked Fable requests on the Fable meter's raw percent, and that percent is relative to Fable's own allowance. So an account at 60% Fable and 10% weekly, which has 20 weekly points left for Fable, ranked ahead of an account at 0% Fable and 70% weekly, which has 30.
anthropicUsageBucketsreadsweekly_scoped_sharesand attaches the allowance to the selected scoped row it indexes, asweeklyAllowancePercenton the Fable window. A share is ignored if it points at a shared or unselected row, is out of range or fractional, falls outside (0, 100], or conflicts with another share. The value comes from upstream and is never inferred from a plan.weeklyandmax-utilizationpool windows, lowest-usage ranking usesanthropicModelRankPercent, which restates Fable on the weekly scale:100 - allowance * (100 - fable%) / 100. Combined with the shared weekly percent, this ranks by real Fable headroom,min(allowance remaining, weekly remaining).five-hourwindow has no five-hour tie-break, so its ranking keeps the raw Fable percent; otherwise a fresh seat's 50 would mask five-hour readings below 50. Auto-switch thresholds also keep the raw Fable percent, so a fresh Fable seat (which ranks at 50) does not trip a low fill-first threshold and rotate accounts. Exhaustion is unchanged, because both scales reach 100 together. Route-profileminQuotaHeadroomis also unchanged.7d_oiheader update keeps the allowance read by the last usage probe.Verification
/api/oauth/usage, and claude.ai's usage call through a signed-in browser. Both returnweekly_scoped_shareswith the shape above. Every account currently reports Fable at 0%, so the nonzero conversion follows the meter semantics (percentis relative to the allowance;used_percent_of_weeklyis reported separately) rather than an observed nonzero pair.tests/providers/provider-anthropic-usage-windows.test.ts(47 pass; 3 behavior cases red on the old source) andtests/adapters/anthropic/anthropic-account-threshold.test.ts(weekly-window ranking, threshold stability and five-hour ordering; each red on the old source).bun run typecheck,bun run structure:checkandbun run privacy:scanpass.bun run test:changed: 41626 pass, 108 skip, 7 fail. Two runs failed on different, unrelated tests, mostly 5-second timeouts under load. Every named failing file passes alone throughbun scripts/test.ts, excepttests/cli/cli-codex-cli-update-boundary.test.ts(npm-global install boundary), which fails the same way with the source change stashed.bun run test(the changed-graph run already covers 41.7k tests across 1784 files); macOS/Windows lanes (batchdevdispatch per policy); GUI. The new field reaches the management API as part of the quota JSON, but the dashboard does not render a "50% of weekly" hint yet.Checklist
structure/providers/anthropic-account-pool.md)Summary by CodeRabbit