fix(usage): un-invert GitHub Copilot Free/limited quota — limited_user_quotas is remaining (#2876) (#2881)

Integrated into release/v3.8.6.

CHANGELOG.md

@@ -25,6 +25,7 @@
 - **gemini:** translate signature-less Gemini thinking model tool calls to text parts to prevent `400 "missing thought_signature"` errors (#2801 — thanks @herjarsa)
 - **translator:** strip `safety_identifier` from `/v1/responses` body before forwarding to Chat Completions upstream; fixes LobeHub-originated `400` errors (#2770)
 - **warning-cleanup:** relax node engine constraint to `>=22.0.0` and clean dependencies (keeping `marked-terminal` to prevent TUI REPL crash) (#2792 — thanks @oyi77)
+- **usage:** un-invert GitHub Copilot Free / limited plan quota — `limited_user_quotas` is the *remaining* count, not used, so the dashboard now shows 100% when the quota is untouched and 0% when fully exhausted (#2876 — thanks @androw)
 - **fix(cli):** register openclaw in the CLI tool-detector so it appears in `omniroute status` alongside its existing API and config support ([#2833](https://github.com/diegosouzapw/OmniRoute/issues/2833))
 
 ### 🧹 Chores
@@ -35,7 +36,7 @@
 ### 🏆 Hall of Contributors
 
 A special thanks to everyone who contributed code, reviews, and tests for this release:
-@akarray, @apoapostolov, @hartmark, @herjarsa, @jeferssonlemes, @oyi77
+@akarray, @androw, @apoapostolov, @hartmark, @herjarsa, @jeferssonlemes, @oyi77
 
 ---
 

open-sse/services/usage.ts

@@ -1261,9 +1261,17 @@ async function getGitHubUsage(accessToken?: string, providerSpecificData?: JsonR
         quotas,
       };
     } else if (dataRecord.monthly_quotas || dataRecord.limited_user_quotas) {
-      // Free/limited plan format
+      // Free/limited plan format. NOTE (#2876): the upstream field
+      // `limited_user_quotas[name]` is the *remaining* count for the month
+      // (it counts down toward 0 and resets on `limited_user_reset_date`),
+      // NOT the used count. The pre-3.8.6 implementation inverted this and
+      // showed "0% when not used / 100% when fully used" on the dashboard.
+      // Confirmed against three independent upstream parsers:
+      //   - robinebers/openusage  docs/providers/copilot.md (Free Tier table)
+      //   - raycast/extensions    agent-usage/src/copilot/fetcher.ts (inline comment)
+      //   - looplj/axonhub        frontend/src/components/quota-badges.tsx
       const monthlyQuotas = toRecord(dataRecord.monthly_quotas);
-      const usedQuotas = toRecord(dataRecord.limited_user_quotas);
+      const remainingQuotas = toRecord(dataRecord.limited_user_quotas);
       const resetDate = getFieldValue(
         dataRecord,
         "limited_user_reset_date",
@@ -1274,14 +1282,18 @@ async function getGitHubUsage(accessToken?: string, providerSpecificData?: JsonR
 
       const addLimitedQuota = (name: string) => {
         const total = toNumber(getFieldValue(monthlyQuotas, name, name), 0);
-        const used = Math.max(0, toNumber(getFieldValue(usedQuotas, name, name), 0));
         if (total <= 0) return null;
-        const clampedUsed = Math.min(used, total);
+        const remainingRaw = Math.max(
+          0,
+          toNumber(getFieldValue(remainingQuotas, name, name), 0)
+        );
+        const remaining = Math.min(remainingRaw, total);
+        const used = Math.max(total - remaining, 0);
         quotas[name] = {
-          used: clampedUsed,
+          used,
           total,
-          remaining: Math.max(total - clampedUsed, 0),
-          remainingPercentage: clampPercentage(((total - clampedUsed) / total) * 100),
+          remaining,
+          remainingPercentage: clampPercentage((remaining / total) * 100),
           unlimited: false,
           resetAt,
         };

tests/unit/copilot-free-quota-not-inverted.test.ts

@@ -0,0 +1,178 @@
+/**
+ * Regression for #2876 — GitHub Copilot Provider Quota rendered the other way around.
+ *
+ * Root cause: in the Free / limited plan path of `getGitHubUsage`, the closure
+ * `addLimitedQuota` treats `data.limited_user_quotas[name]` as the *used* count.
+ * Three independent upstream sources confirm it is the *remaining* count:
+ *
+ *   1. robinebers/openusage — docs/providers/copilot.md  (Free Tier example +
+ *      "Displayed Lines" table — every row labelled "remaining")
+ *   2. raycast/extensions — agent-usage/src/copilot/fetcher.ts:77
+ *      ("`limited_user_quotas` behaves like the remaining amount for the month")
+ *   3. looplj/axonhub — frontend/src/components/quota-badges.tsx:77-81
+ *      (destructures the value as `remaining` and computes `remaining / total`)
+ *
+ * These assertions therefore encode the upstream-correct semantics and FAIL on
+ * the unfixed code (the brand-new case shows 0% instead of 100%, exactly the
+ * symptom the reporter @androw saw).
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+
+const usageService = await import("../../open-sse/services/usage.ts");
+
+const originalFetch = globalThis.fetch;
+
+test.afterEach(() => {
+  globalThis.fetch = originalFetch;
+});
+
+function stubFetch(payload: unknown) {
+  globalThis.fetch = async () =>
+    new Response(JSON.stringify(payload), {
+      status: 200,
+      headers: { "content-type": "application/json" },
+    });
+}
+
+test("#2876 — Copilot Free brand-new account shows 100% remaining (not 0%)", async () => {
+  // Reproduces the reporter's scenario: the account has never been used, so
+  // every entry of limited_user_quotas equals its monthly_quotas counterpart
+  // (full remaining = total). Before the fix this returns 0%.
+  stubFetch({
+    copilot_plan: "free",
+    limited_user_reset_date: new Date(Date.now() + 30 * 24 * 60 * 60_000).toISOString(),
+    monthly_quotas: {
+      chat: 50,
+      completions: 2000,
+    },
+    limited_user_quotas: {
+      chat: 50,
+      completions: 2000,
+    },
+  });
+
+  const result: any = await usageService.getUsageForProvider({
+    provider: "github",
+    accessToken: "gho-brand-new",
+  });
+
+  assert.equal(result.quotas.chat.total, 50);
+  assert.equal(result.quotas.chat.remaining, 50);
+  assert.equal(result.quotas.chat.used, 0);
+  assert.equal(
+    result.quotas.chat.remainingPercentage,
+    100,
+    "brand-new free account must show 100% remaining, not 0%"
+  );
+
+  assert.equal(result.quotas.completions.total, 2000);
+  assert.equal(result.quotas.completions.remaining, 2000);
+  assert.equal(result.quotas.completions.used, 0);
+  assert.equal(result.quotas.completions.remainingPercentage, 100);
+});
+
+test("#2876 — Copilot Free realistic mid-month account computes correct remaining percentage", async () => {
+  // Numbers taken directly from robinebers/openusage docs/providers/copilot.md
+  // Free Tier example: chat 410/500 remaining, completions 4000/4000.
+  stubFetch({
+    copilot_plan: "free",
+    limited_user_reset_date: new Date(Date.now() + 7 * 24 * 60 * 60_000).toISOString(),
+    monthly_quotas: {
+      chat: 500,
+      completions: 4000,
+    },
+    limited_user_quotas: {
+      chat: 410,
+      completions: 4000,
+    },
+  });
+
+  const result: any = await usageService.getUsageForProvider({
+    provider: "github",
+    accessToken: "gho-mid-month",
+  });
+
+  assert.equal(result.quotas.chat.total, 500);
+  assert.equal(result.quotas.chat.remaining, 410);
+  assert.equal(result.quotas.chat.used, 90);
+  assert.equal(
+    result.quotas.chat.remainingPercentage,
+    82,
+    "410 of 500 remaining must surface as 82%, not 18%"
+  );
+
+  assert.equal(result.quotas.completions.remainingPercentage, 100);
+});
+
+test("#2876 — Copilot Free fully-exhausted quota shows 0% remaining (not 100%)", async () => {
+  // The other end of the inversion: the user has burned through everything.
+  // limited_user_quotas counts down to 0; the dashboard must report 0%.
+  stubFetch({
+    copilot_plan: "free",
+    limited_user_reset_date: new Date(Date.now() + 60_000).toISOString(),
+    monthly_quotas: {
+      chat: 50,
+      completions: 2000,
+    },
+    limited_user_quotas: {
+      chat: 0,
+      completions: 0,
+    },
+  });
+
+  const result: any = await usageService.getUsageForProvider({
+    provider: "github",
+    accessToken: "gho-exhausted",
+  });
+
+  assert.equal(result.quotas.chat.total, 50);
+  assert.equal(result.quotas.chat.remaining, 0);
+  assert.equal(result.quotas.chat.used, 50);
+  assert.equal(
+    result.quotas.chat.remainingPercentage,
+    0,
+    "fully-exhausted quota must show 0% remaining, not 100%"
+  );
+
+  assert.equal(result.quotas.completions.remainingPercentage, 0);
+  assert.equal(result.quotas.completions.used, 2000);
+});
+
+test("#2876 — Copilot paid plan (quota_snapshots) is unaffected by the fix", async () => {
+  // The paid path reads `remaining` / `percent_remaining` / `entitlement`
+  // directly — those field names are correctly named upstream and require
+  // no semantic translation. Asserting the paid path still works guards
+  // against accidental scope creep.
+  stubFetch({
+    copilot_plan: "pro",
+    quota_reset_date: new Date(Date.now() + 30 * 24 * 60 * 60_000).toISOString(),
+    quota_snapshots: {
+      premium_interactions: {
+        entitlement: 300,
+        remaining: 240,
+        percent_remaining: 80,
+        unlimited: false,
+      },
+      chat: {
+        entitlement: 1000,
+        remaining: 950,
+        percent_remaining: 95,
+        unlimited: false,
+      },
+    },
+  });
+
+  const result: any = await usageService.getUsageForProvider({
+    provider: "github",
+    accessToken: "gho-pro",
+  });
+
+  assert.equal(result.quotas.premium_interactions.total, 300);
+  assert.equal(result.quotas.premium_interactions.remaining, 240);
+  assert.equal(result.quotas.premium_interactions.used, 60);
+  assert.equal(result.quotas.premium_interactions.remainingPercentage, 80);
+
+  assert.equal(result.quotas.chat.remaining, 950);
+  assert.equal(result.quotas.chat.remainingPercentage, 95);
+});

tests/unit/usage-service-hardening.test.ts

@@ -21,6 +21,13 @@ test.afterEach(() => {
 });
 
 test("usage service covers GitHub free-plan parsing, auth denial and unsupported providers", async () => {
+  // Free-plan fixture aligned with the upstream protocol (#2876): in
+  // `copilot_internal/user`, `limited_user_quotas[name]` is the REMAINING
+  // count for the month and counts down toward 0; `monthly_quotas[name]`
+  // is the total allowance. The chat numbers below (410 / 500) are the
+  // example values from robinebers/openusage docs/providers/copilot.md.
+  // We also keep an out-of-range premium_interactions remaining (70 > 50)
+  // to assert the defensive clamp at the upstream boundary.
   const calls: any[] = [];
   globalThis.fetch = async (_url, init = {}) => {
     calls.push(init);
@@ -30,13 +37,13 @@ test("usage service covers GitHub free-plan parsing, auth denial and unsupported
         limited_user_reset_date: new Date(Date.now() + 60_000).toISOString(),
         monthly_quotas: {
           premium_interactions: 50,
-          chat: 25,
-          completions: 10,
+          chat: 500,
+          completions: 4000,
         },
         limited_user_quotas: {
           premium_interactions: 70,
-          chat: 5,
-          completions: 2,
+          chat: 410,
+          completions: 4000,
         },
       }),
       { status: 200 }
@@ -49,10 +56,21 @@ test("usage service covers GitHub free-plan parsing, auth denial and unsupported
   });
 
   assert.equal(freeUsage.plan, "Copilot Free");
+  // premium_interactions: upstream remaining=70 clamped to total=50 → fully
+  // available, 0 used, 100% remaining.
   assert.equal(freeUsage.quotas.premium_interactions.total, 50);
-  assert.equal(freeUsage.quotas.premium_interactions.used, 50);
-  assert.equal(freeUsage.quotas.chat.remaining, 20);
-  assert.equal(freeUsage.quotas.completions.remainingPercentage, 80);
+  assert.equal(freeUsage.quotas.premium_interactions.remaining, 50);
+  assert.equal(freeUsage.quotas.premium_interactions.used, 0);
+  assert.equal(freeUsage.quotas.premium_interactions.remainingPercentage, 100);
+  // chat: 410 remaining of 500 → 82% remaining, 90 used.
+  assert.equal(freeUsage.quotas.chat.total, 500);
+  assert.equal(freeUsage.quotas.chat.remaining, 410);
+  assert.equal(freeUsage.quotas.chat.used, 90);
+  assert.equal(freeUsage.quotas.chat.remainingPercentage, 82);
+  // completions: untouched → 100% remaining.
+  assert.equal(freeUsage.quotas.completions.remaining, 4000);
+  assert.equal(freeUsage.quotas.completions.used, 0);
+  assert.equal(freeUsage.quotas.completions.remainingPercentage, 100);
   assert.equal(calls[0].headers.Authorization, "token gho-free");
   assert.equal(calls[0].headers["User-Agent"], "GitHubCopilotChat/0.45.1");
   assert.equal(calls[0].headers["Editor-Version"], "vscode/1.117.0");