Phase1: Schema + skill event tracking

src/app/api/admin/billing/backfill/route.ts

@@ -0,0 +1,70 @@
+import { NextResponse } from "next/server";
+import { requirePlatformRole } from "@/lib/session";
+import { listTenants } from "@/lib/k8s";
+import { backfillTenantBillingLifecycle } from "@/lib/db";
+import { safeError } from "@/lib/errors";
+
+/**
+ * POST /api/admin/billing/backfill
+ *
+ * One-off bootstrap that reads every live PiecedTenant CR and
+ * mirrors it into the Phase 1 billing tables:
+ *   - tenant_billing_lifecycle.created_at ← CR's creationTimestamp
+ *   - tenant_skill_events: one 'enabled' event per package in
+ *     spec.packages, anchored at the CR's creationTimestamp
+ *   - tenant_suspension_events: one 'suspended' event if the CR is
+ *     currently suspended (anchored at status.suspendedAt)
+ *
+ * Idempotent — re-running is safe. The helper only inserts rows
+ * for tenants that have no lifecycle row / no events yet; running
+ * twice produces zero additional rows.
+ *
+ * Authorization: platform role only. The body of the request is
+ * ignored.
+ *
+ * Response: counts of rows inserted, mostly for sanity-checking
+ * (expect non-zero on first run, zero on subsequent runs).
+ *
+ * Phase 2 will surface this behind an admin UI button.
+ */
+export async function POST() {
+  try {
+    await requirePlatformRole();
+  } catch {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  }
+
+  try {
+    const tenants = await listTenants();
+    const result = await backfillTenantBillingLifecycle(
+      tenants.map((t) => ({
+        name: t.metadata.name,
+        // Tenants without the org label exist as a pre-Slice-3
+        // artifact; we still record them but with 'unknown' as the
+        // org id, which surfaces them in admin reports for manual
+        // labelling. Per-org billing computation skips rows with
+        // org id = 'unknown'.
+        zitadelOrgId:
+          t.metadata.labels?.["pieced.ch/zitadel-org-id"] ?? "unknown",
+        createdAt: t.metadata.creationTimestamp
+          ? new Date(t.metadata.creationTimestamp)
+          : new Date(),
+        packages: t.spec.packages ?? [],
+        suspendedAt: t.status?.suspendedAt
+          ? new Date(t.status.suspendedAt)
+          : null,
+      }))
+    );
+    return NextResponse.json({
+      message: "Backfill complete.",
+      tenantsExamined: tenants.length,
+      ...result,
+    });
+  } catch (e: any) {
+    console.error("Backfill failed:", e);
+    return NextResponse.json(
+      { error: safeError(e, "Backfill failed") },
+      { status: 500 }
+    );
+  }
+}

src/app/api/admin/requests/[id]/approve/route.ts

@@ -4,6 +4,9 @@ import {
   getTenantRequestById,
   updateTenantRequestStatus,
   clearEncryptedSecrets,
+  recordTenantCreated,
+  recordSkillEvents,
+  recordSuspensionEvent,
 } from "@/lib/db";
 import { createTenant, patchTenantSpec, setTenantAnnotation } from "@/lib/k8s";
 import { sendApprovalEmail, sendResumeApprovalEmail } from "@/lib/email";
@@ -85,6 +88,23 @@ export async function POST(
     }
     try {
       await patchTenantSpec(tenantRequest.tenantName, { suspend: false });
+
+      // Billing — Phase 1: record the resume so monthly proration
+      // counts the suspended segment correctly. Best-effort; if
+      // logging fails, the approval still succeeds.
+      try {
+        await recordSuspensionEvent(
+          tenantRequest.tenantName,
+          tenantRequest.zitadelOrgId,
+          "resumed"
+        );
+      } catch (e) {
+        console.error(
+          "billing: failed to record resumed suspension event:",
+          e
+        );
+      }
+
       // Clear the annotation that pauses the operator's 60-day TTL.
       // Best-effort — annotation cleanup is also done by the operator
       // when it sees suspend=false on the next reconcile (it clears
@@ -199,6 +219,35 @@ export async function POST(
       }
     );
 
+    // Billing — Phase 1: record the tenant's creation and initial
+    // package state. Anchored at "now" rather than the CR's
+    // creationTimestamp because we don't get the timestamp back from
+    // createTenant — the few-millisecond skew vs the CR's actual
+    // creationTimestamp is irrelevant for monthly billing.
+    //
+    // Best-effort: tracking failures must never block provisioning.
+    // The backfill helper can repair any gaps later if needed.
+    const billingAnchor = new Date();
+    try {
+      await recordTenantCreated(
+        tenantName,
+        tenantRequest.zitadelOrgId,
+        billingAnchor
+      );
+      await recordSkillEvents(
+        tenantName,
+        tenantRequest.zitadelOrgId,
+        packages,
+        [],
+        billingAnchor
+      );
+    } catch (e) {
+      console.error(
+        "billing: failed to record tenant creation / initial skill events:",
+        e
+      );
+    }
+
     // Step 5: Update request status — clear admin notes on re-approval
     const updated = await updateTenantRequestStatus(id, "provisioning", {
       adminNotes: isReApproval ? null : adminNotes,

src/app/api/admin/tenants/[name]/delete/route.ts

@@ -4,6 +4,7 @@ import { getTenant, deleteTenant } from "@/lib/k8s";
 import {
   markTenantRequestDeletedByTenantName,
   removeAllAssignmentsForTenant,
+  recordTenantDeleted,
 } from "@/lib/db";
 import { safeError } from "@/lib/errors";
 
@@ -49,6 +50,15 @@ export async function POST(
       console.error("Failed to clean up tenant assignments:", e)
     );
 
+    // Billing — Phase 1: stamp deletion timestamp on the lifecycle
+    // row so the final invoice covering the deletion month can
+    // prorate correctly. Idempotent at the DB layer; a missing
+    // lifecycle row (e.g. pre-Phase-1 tenants that haven't been
+    // backfilled yet) makes this a no-op.
+    await recordTenantDeleted(name).catch((e) =>
+      console.error("billing: failed to stamp tenant deletion:", e)
+    );
+
     return NextResponse.json({
       message: "Tenant deletion initiated. The operator will clean up all resources.",
     });

src/app/api/tenants/[name]/route.ts

@@ -3,6 +3,7 @@ import { getSessionUser, canMutate } from "@/lib/session";
 import { canUserSeeTenant } from "@/lib/visibility";
 import { getTenant, patchTenantSpec } from "@/lib/k8s";
 import { getPackageDef } from "@/lib/packages";
+import { recordSkillEvents } from "@/lib/db";
 import { safeError } from "@/lib/errors";
 
 const ALLOWED_WORKSPACE_FILES = ["SOUL.md", "AGENTS.md", "TOOLS.md"];
@@ -187,6 +188,50 @@ export async function PATCH(
     }
 
     const updated = await patchTenantSpec(name, specPatch);
+
+    // Billing — Phase 1: if packages changed, record enable/disable
+    // events. The diff is computed against the patched CR (the
+    // returned state) rather than `existing` so the events match
+    // what K8s actually committed. Best-effort: a logging failure
+    // never poisons the PATCH response — drift would be reconciled
+    // on the next backfill or by the next normal toggle.
+    //
+    // Note on races: two concurrent PATCHes could each see the
+    // same `existing` and both succeed at the K8s layer (last write
+    // wins for spec.packages, which is replaced wholesale). The
+    // events from the losing PATCH would then describe a transition
+    // that no longer reflects reality. Acceptable trade-off for v1
+    // — the toggle UI sends one request at a time and races would
+    // only matter for adjacent same-day toggles, which the billing
+    // computation collapses to a single billable day anyway.
+    if (specPatch.packages !== undefined) {
+      try {
+        const orgId =
+          existing.metadata.labels?.["pieced.ch/zitadel-org-id"] ?? null;
+        if (orgId) {
+          const oldSet = new Set<string>(existing.spec.packages ?? []);
+          const newSet = new Set<string>(updated.spec.packages ?? []);
+          const added = [...newSet].filter((x) => !oldSet.has(x));
+          const removed = [...oldSet].filter((x) => !newSet.has(x));
+          if (added.length > 0 || removed.length > 0) {
+            await recordSkillEvents(name, orgId, added, removed);
+          }
+        } else {
+          // A tenant without the org label is a pre-Slice-3 artifact
+          // — we can't attribute its skill events to any org. Log
+          // and skip rather than guess.
+          console.warn(
+            `billing: tenant ${name} has no zitadel-org-id label; skill events not recorded`
+          );
+        }
+      } catch (e) {
+        console.error(
+          `billing: failed to record skill events for ${name}:`,
+          e
+        );
+      }
+    }
+
     return NextResponse.json(updated);
   } catch (e: any) {
     return NextResponse.json(

src/app/api/tenants/[name]/suspend/route.ts

@@ -3,6 +3,7 @@ import { z } from "zod";
 import { getSessionUser, canMutate } from "@/lib/session";
 import { getTenant, patchTenantSpec, setTenantAnnotation } from "@/lib/k8s";
 import { canUserSeeTenant } from "@/lib/visibility";
+import { recordSuspensionEvent } from "@/lib/db";
 import { safeError } from "@/lib/errors";
 
 const patchSchema = z.object({
@@ -101,6 +102,33 @@ export async function PATCH(
   try {
     await patchTenantSpec(name, { suspend });
 
+    // Billing — Phase 1: record the transition so monthly proration
+    // can exclude suspended days from the fixed fee. The portal
+    // commands this transition; the operator's status.suspendedAt
+    // lags by a reconcile cycle (seconds), which is irrelevant for
+    // monthly billing. Best-effort: a logging failure never blocks
+    // the suspend/resume itself.
+    try {
+      const orgId =
+        tenant.metadata.labels?.["pieced.ch/zitadel-org-id"] ?? null;
+      if (orgId) {
+        await recordSuspensionEvent(
+          name,
+          orgId,
+          suspend ? "suspended" : "resumed"
+        );
+      } else {
+        console.warn(
+          `billing: tenant ${name} has no zitadel-org-id label; suspension event not recorded`
+        );
+      }
+    } catch (e) {
+      console.error(
+        `billing: failed to record suspension event for ${name}:`,
+        e
+      );
+    }
+
     // On admin-side resume, also clear the pending-resume-request
     // annotation if it exists. Belt-and-suspenders: the admin-approve
     // endpoint already clears it on its happy path, but a platform