diff --git a/prisma/migrations/20260909000000_add_error_code_lookup/migration.sql b/prisma/migrations/20260909000000_add_error_code_lookup/migration.sql
new file mode 100644
index 0000000..dc52dea
--- /dev/null
+++ b/prisma/migrations/20260909000000_add_error_code_lookup/migration.sql
@@ -0,0 +1,18 @@
+-- CreateTable
+CREATE TABLE "error_code_lookups" (
+    "id" TEXT NOT NULL,
+    "errorCodeId" TEXT NOT NULL,
+    "productId" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "error_code_lookups_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "error_code_lookups_productId_createdAt_idx" ON "error_code_lookups"("productId", "createdAt");
+
+-- AddForeignKey
+ALTER TABLE "error_code_lookups" ADD CONSTRAINT "error_code_lookups_errorCodeId_fkey" FOREIGN KEY ("errorCodeId") REFERENCES "error_codes"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "error_code_lookups" ADD CONSTRAINT "error_code_lookups_productId_fkey" FOREIGN KEY ("productId") REFERENCES "products"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 24a9294..af56441 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -45,6 +45,7 @@ model Product {
   tickets              Ticket[]
   knowledgeEntries     KnowledgeEntry[]
   errorCodes           ErrorCode[]
+  errorCodeLookups     ErrorCodeLookup[]
   knownIssues          KnownIssue[]
   runbooks             Runbook[]
   aiConfidencePolicies AIConfidencePolicy[]
@@ -239,13 +240,31 @@ model ErrorCode {
   productId   String
   description String
 
-  product     Product      @relation(fields: [productId], references: [id])
+  product     Product           @relation(fields: [productId], references: [id])
   knownIssues KnownIssue[]
+  lookups     ErrorCodeLookup[]
 
   @@unique([productId, code])
   @@map("error_codes")
 }
 
+// 015-reporting-dashboards research.md §6: a durable, append-only audit row recording that a
+// known-error-code lookup happened — 014-full-observability's own equivalent
+// (supporthub_known_error_lookups_total) is a process-lifetime Prometheus counter, unusable for
+// a historical "top errors" report. productId is denormalized from errorCode.productId so the
+// Product dashboard's range query never needs to join back through ErrorCode just to filter.
+model ErrorCodeLookup {
+  id          String   @id @default(cuid())
+  errorCodeId String
+  errorCode   ErrorCode @relation(fields: [errorCodeId], references: [id])
+  productId   String
+  product     Product   @relation(fields: [productId], references: [id])
+  createdAt   DateTime  @default(now())
+
+  @@index([productId, createdAt])
+  @@map("error_code_lookups")
+}
+
 model KnownIssue {
   id          String  @id @default(cuid())
   productId   String
diff --git a/specs/015-reporting-dashboards/checklists/requirements.md b/specs/015-reporting-dashboards/checklists/requirements.md
index f411e68..f9e3ac8 100644
--- a/specs/015-reporting-dashboards/checklists/requirements.md
+++ b/specs/015-reporting-dashboards/checklists/requirements.md
@@ -47,3 +47,48 @@
   required — every open question (default date window, SLA-risk threshold, top-N limit) had a
   reasonable, documented, CONFIGURABLE default (see Assumptions), matching the roadmap's own
   "never hardcode a placeholder value and ship it as final" instruction.
+
+## Implementation Notes (post-build)
+
+- Named the Product dashboard's own repository class `ProductReportRepository` (not
+  `ProductRepository`) once it became clear resolving `externalProductId -> Product` should
+  reuse `catalog/products`' own already-public `productsRepository.findByExternalProductId`
+  rather than duplicating that lookup — avoids a name collision and keeps "one authority per
+  concern" (Constitution Principle I's spirit) for product resolution.
+- `ManagementRepository` and `SupportRepository` both needed byte-identical
+  first-response-duration and resolution-duration queries. Extracted into a shared
+  `SharedReportRepository` both compose, rather than duplicating the Prisma query (or the
+  averaging helper alone) twice — discovered while writing the second repository and seeing the
+  copy-paste, not planned upfront in research.md.
+- "Top errors"/"most common errors" resolution-back-to-`code` logic moved into
+  `ErrorCodesService.getTopErrorCodesForProduct` (a new method on the module that already owns
+  `ErrorCode`), rather than the reports module reaching into `errorCodesRepository`/
+  `errorCodeLookupRepository` directly — cleaner module-boundary ownership than research.md's
+  original per-repository sketch implied.
+- The AI dashboard's "failed troubleshooting then escalated" figure (spec.md User Story 4) has
+  no single stored flag anywhere in this codebase — `classifyStepOutcome`'s per-step verdicts are
+  never persisted as their own durable record. Implemented as a documented proxy instead: an
+  escalated session with `toolCallCount > 0` attempted troubleshooting before giving up, one with
+  zero attempts escalated immediately. Documented directly in `ai.repository.ts`'s own code
+  comment, the same "honest, documented simplification" precedent research.md §7 already set for
+  the confidence-distribution bucketing.
+- Three of this module's public exports needed adding to their owning modules' top-level
+  `index.ts` (not previously exposed): `decideConfidenceBand`/`ConfidenceBand` and
+  `knowledgeReferenceRepository` from `ai-support/sessions`, matching the "extend an existing
+  module's public surface for a later feature" precedent already used repeatedly this session
+  (004's `productsRepository`, 009's `problemsRepository`).
+- Found a real regression during T028's full regression pass: `known-issues.test.ts` (004-
+  product-knowledge, pre-existing) calls `findKnownIssuesByErrorCode` and its own `afterAll`
+  deleted `ErrorCode` rows before this feature's new `ErrorCodeLookup` FK (RESTRICT) existed —
+  once T004 started writing a lookup row on every call, that cleanup order started failing with
+  an FK violation. Fixed by deleting `ErrorCodeLookup` rows first in that test's own `afterAll`.
+  This feature's own new test files never delete `ErrorCode` rows at all, so they weren't
+  affected the same way (leftover rows there are the same accepted throwaway-data tradeoff
+  already established elsewhere this session).
+- Confirmed (not caused by this feature — the exact pre-existing issue 014-full-observability's
+  own checklist already documented and root-caused via `git checkout` comparison) that this
+  feature's own new integration test files, which also name their test products `TEST_*`,
+  occasionally hit the same shared `deriveProductCode` "TEST" prefix collision under vitest's
+  concurrent file execution when run alongside other `TEST_*`-prefixed files. Every dashboard
+  test passes reliably run individually or in small groups; the intermittent 500 in a full
+  combined run is the same known, out-of-scope, 003-ticketing concern.
diff --git a/specs/015-reporting-dashboards/tasks.md b/specs/015-reporting-dashboards/tasks.md
index 12bcba3..819926e 100644
--- a/specs/015-reporting-dashboards/tasks.md
+++ b/specs/015-reporting-dashboards/tasks.md
@@ -1,5 +1,5 @@
 ---
-description: "Task list for 015-reporting-dashboards"
+description: 'Task list for 015-reporting-dashboards'
 ---
 
 # Tasks: Reporting and Analytics Dashboards
@@ -23,32 +23,32 @@ All file paths are relative to `supporthub-api/` (repo root).
 
 ## Phase 1: Foundational (Blocking Prerequisites)
 
-- [ ] T001 Add `REPORTING_DEFAULT_WINDOW_DAYS` (default `30`),
+- [x] T001 Add `REPORTING_DEFAULT_WINDOW_DAYS` (default `30`),
       `REPORTING_SLA_RISK_THRESHOLD_MINUTES` (default `60`), and `REPORTING_TOP_N_LIMIT`
       (default `10`) to `src/config/env.ts`, exposed via a new `reportingConfig` in
       `src/config/reporting.ts` (or added to an existing config file, matching this codebase's
       own per-feature config-file convention)
-- [ ] T002 Add the `ErrorCodeLookup` model to `prisma/schema.prisma` per data-model.md, generate
+- [x] T002 Add the `ErrorCodeLookup` model to `prisma/schema.prisma` per data-model.md, generate
       the migration via `prisma migrate diff --from-url <db-url> --to-schema-datamodel
-      ./prisma/schema.prisma --script`, hand-write it into
+    ./prisma/schema.prisma --script`, hand-write it into
       `prisma/migrations/<timestamp>_add_error_code_lookup/migration.sql`, apply via `prisma
-      migrate deploy` against the throwaway test database (depends on T001 only in that both
+    migrate deploy` against the throwaway test database (depends on T001 only in that both
       are Foundational — no code dependency)
-- [ ] T003 Add `ai-support/knowledge/repository/error-code-lookup.repository.ts` —
+- [x] T003 Add `ai-support/knowledge/repository/error-code-lookup.repository.ts` —
       `create(errorCodeId, productId)`, exported from the knowledge module's repository index
       (depends on T002)
-- [ ] T004 [P] Call the new repository's `create(...)` from
+- [x] T004 [P] Call the new repository's `create(...)` from
       `ai-support/knowledge/service/error-codes.service.ts`'s existing
       `findKnownIssuesByErrorCode`, alongside (not replacing) 014's own
       `knownErrorLookupsCounter.inc(...)` call at that same call site (depends on T003)
-- [ ] T005 [P] Add `platform/reports/mapper/date-range.ts` — parses/validates `from`/`to` query
+- [x] T005 [P] Add `platform/reports/mapper/date-range.ts` — parses/validates `from`/`to` query
       params, defaulting via T001's `reportingConfig.defaultWindowDays`, throwing
       `ValidationError` when `from > to` (depends on T001)
-- [ ] T006 [P] Add `platform/reports/mapper/rate.ts` — a shared `computeRate(numerator,
-      denominator): number | null` and `computeAverageSeconds(durations: number[]): number |
-      null` pair, both returning `null` (never `NaN`/`0`) when there's no qualifying data
+- [x] T006 [P] Add `platform/reports/mapper/rate.ts` — a shared `computeRate(numerator,
+    denominator): number | null` and `computeAverageSeconds(durations: number[]): number |
+    null` pair, both returning `null` (never `NaN`/`0`) when there's no qualifying data
       (research.md §3) — no dependency, pure functions
-- [ ] T007 Scaffold `platform/reports/schema/` (query-param zod schema using T005's date-range
+- [x] T007 Scaffold `platform/reports/schema/` (query-param zod schema using T005's date-range
       parsing), `platform/reports/controller/reports.controller.ts` (empty methods to be filled
       in per user story below), `platform/reports/routes/reports.routes.ts` registering all four
       routes behind `requireRole('ADMIN')`, and update `platform/reports/index.ts` to export the
@@ -69,20 +69,20 @@ can now be built independently.
 
 ### Tests for User Story 1
 
-- [ ] T008 [P] [US1] Unit tests for T006's `computeRate`/`computeAverageSeconds` (empty input ->
+- [x] T008 [P] [US1] Unit tests for T006's `computeRate`/`computeAverageSeconds` (empty input ->
       `null`; a real mix -> the correct value) in
       `tests/unit/platform/reports/rate-helpers.test.ts`
 
 ### Implementation for User Story 1
 
-- [ ] T009 [US1] Add `platform/reports/repository/management.repository.ts` — one method per
+- [x] T009 [US1] Add `platform/reports/repository/management.repository.ts` — one method per
       research.md §2's Management table row (ticket counts by status, SLA-run outcome counts,
       response/resolution duration row-fetches for T006 to average) (depends on T007)
-- [ ] T010 [US1] Add `ReportsService.getManagementDashboard(range)` composing T009's repository
+- [x] T010 [US1] Add `ReportsService.getManagementDashboard(range)` composing T009's repository
       calls into the `ManagementDashboard` shape, reusing the `Resolution.resolvedBy` convention
       (research.md §4) for the AI-vs-human split (depends on T009)
-- [ ] T011 [US1] Wire `GET /admin/reports/management` to the controller/service (depends on T010)
-- [ ] T012 [US1] Integration test covering Quickstart Scenario 1 (real tickets in various
+- [x] T011 [US1] Wire `GET /admin/reports/management` to the controller/service (depends on T010)
+- [x] T012 [US1] Integration test covering Quickstart Scenario 1 (real tickets in various
       terminal states, a met and a breached SLA run, verified figure-by-figure; a no-activity
       range returns all-zero counts and all-null rates) in
       `tests/integration/platform-reports/management-dashboard.test.ts` (depends on T011)
@@ -100,14 +100,14 @@ can now be built independently.
 
 ### Implementation for User Story 2
 
-- [ ] T013 [P] [US2] Add `platform/reports/repository/product.repository.ts` — ticket/problem
+- [x] T013 [P] [US2] Add `platform/reports/repository/product.repository.ts` — ticket/problem
       queries scoped by `productId`, plus a query against T003's `ErrorCodeLookup` table for
       the top-N ranking (`reportingConfig.topNLimit`) (depends on T007)
-- [ ] T014 [US2] Add `ReportsService.getProductDashboard(externalProductId, range)`, 404-ing via
+- [x] T014 [US2] Add `ReportsService.getProductDashboard(externalProductId, range)`, 404-ing via
       `NotFoundError` when the product doesn't resolve (FR-006) before running any aggregation
       query (depends on T013)
-- [ ] T015 [US2] Wire `GET /admin/reports/product/:externalProductId` (depends on T014)
-- [ ] T016 [US2] Integration test covering Quickstart Scenario 2 (two products' data never
+- [x] T015 [US2] Wire `GET /admin/reports/product/:externalProductId` (depends on T014)
+- [x] T016 [US2] Integration test covering Quickstart Scenario 2 (two products' data never
       cross-contaminating each other's figures; an unknown product 404s) in
       `tests/integration/platform-reports/product-dashboard.test.ts` (depends on T015)
 
@@ -123,13 +123,13 @@ can now be built independently.
 
 ### Implementation for User Story 3
 
-- [ ] T017 [P] [US3] Add `platform/reports/repository/support.repository.ts` — current
+- [x] T017 [P] [US3] Add `platform/reports/repository/support.repository.ts` — current
       `Assignment` workload-by-agent query, `SLARun` at-risk/breached queries (`resolutionDueAt`
       within `reportingConfig.slaRiskThresholdMinutes` of now, per research.md §2) (depends on
       T007)
-- [ ] T018 [US3] Add `ReportsService.getSupportDashboard(range)` (depends on T017)
-- [ ] T019 [US3] Wire `GET /admin/reports/support` (depends on T018)
-- [ ] T020 [US3] Integration test covering Quickstart Scenario 3 (real per-agent assignment
+- [x] T018 [US3] Add `ReportsService.getSupportDashboard(range)` (depends on T017)
+- [x] T019 [US3] Wire `GET /admin/reports/support` (depends on T018)
+- [x] T020 [US3] Integration test covering Quickstart Scenario 3 (real per-agent assignment
       counts; a near-due-but-not-breached run counted as at-risk, distinct from breached) in
       `tests/integration/platform-reports/support-dashboard.test.ts` (depends on T019)
 
@@ -145,20 +145,20 @@ can now be built independently.
 
 ### Tests for User Story 4
 
-- [ ] T021 [P] [US4] Unit test: the confidence-distribution bucketing reuses
+- [x] T021 [P] [US4] Unit test: the confidence-distribution bucketing reuses
       `decideConfidenceBand` (005-ai-support) against `aiConfig` defaults, not a reimplemented
       threshold check, in `tests/unit/platform/reports/confidence-distribution.test.ts`
 
 ### Implementation for User Story 4
 
-- [ ] T022 [US4] Add `platform/reports/repository/ai.repository.ts` — `AISupportSession` outcome
+- [x] T022 [US4] Add `platform/reports/repository/ai.repository.ts` — `AISupportSession` outcome
       counts, `AIDiagnosis` confidence fetch, `AIKnowledgeReference` presence-per-session query,
       `AIAction`/`AIActionResult` outcome counts (depends on T007)
-- [ ] T023 [US4] Add `ReportsService.getAiDashboard(range)`, bucketing confidence via
+- [x] T023 [US4] Add `ReportsService.getAiDashboard(range)`, bucketing confidence via
       `decideConfidenceBand` + `aiConfig.defaultHighConfidence`/`defaultLowConfidence`
       (research.md §7) (depends on T022, T021)
-- [ ] T024 [US4] Wire `GET /admin/reports/ai` (depends on T023)
-- [ ] T025 [US4] Integration test covering Quickstart Scenario 4 (real AI sessions to mixed
+- [x] T024 [US4] Wire `GET /admin/reports/ai` (depends on T023)
+- [x] T025 [US4] Integration test covering Quickstart Scenario 4 (real AI sessions to mixed
       outcomes, mixed tool results, a spread of diagnosis confidence values) in
       `tests/integration/platform-reports/ai-dashboard.test.ts` (depends on T024)
 
@@ -169,10 +169,10 @@ together — this feature's full scope.
 
 ## Phase 6: Polish & Cross-Cutting Concerns
 
-- [ ] T026 [P] Update `specs/015-reporting-dashboards/checklists/requirements.md` Notes with any
+- [x] T026 [P] Update `specs/015-reporting-dashboards/checklists/requirements.md` Notes with any
       implementation-time findings
-- [ ] T027 Run `npx tsx scripts/check-architecture.ts` and `npm run lint`/`npm run typecheck`
-- [ ] T028 Full regression: `npm run test:unit` then the full integration suite against real
+- [x] T027 Run `npx tsx scripts/check-architecture.ts` and `npm run lint`/`npm run typecheck`
+- [x] T028 Full regression: `npm run test:unit` then the full integration suite against real
       Docker-provisioned Postgres/Redis, confirming nothing outside this feature regressed
       (particularly `error-codes.service.ts`'s own existing tests, now touched by T004)
 
diff --git a/src/api/routes.ts b/src/api/routes.ts
index 68d21bd..a815a0a 100644
--- a/src/api/routes.ts
+++ b/src/api/routes.ts
@@ -24,6 +24,7 @@ import { solutionsRoutes } from '@/modules/problem-management/solutions';
 import { verificationRoutes } from '@/modules/problem-management/verification';
 import { resolutionsRoutes } from '@/modules/problem-management/resolutions';
 import { authRoutes } from '@/modules/identity/auth';
+import { reportsRoutes } from '@/modules/platform/reports';
 
 export async function registerGlobalRoutes(app: FastifyInstance): Promise<void> {
   await app.register(healthRoutes);
@@ -49,5 +50,6 @@ export async function registerGlobalRoutes(app: FastifyInstance): Promise<void>
   await app.register(solutionsRoutes);
   await app.register(verificationRoutes);
   await app.register(resolutionsRoutes);
+  await app.register(reportsRoutes);
   // Further domain module routes will be registered here as feature modules are wired up
 }
diff --git a/src/config/env.ts b/src/config/env.ts
index 5cfb0ad..5460626 100644
--- a/src/config/env.ts
+++ b/src/config/env.ts
@@ -80,6 +80,13 @@ const envSchema = z.object({
   // configured" — tracing still runs, just exports to the console instead (never a startup
   // requirement) — see specs/014-full-observability/research.md "Distributed tracing".
   OTEL_EXPORTER_OTLP_ENDPOINT: z.string().optional(),
+
+  // Reporting and Analytics Dashboards (015) — CONFIGURABLE per docs/10-implementation-
+  // roadmap.md's own "never hardcode a placeholder value and ship it as final" instruction —
+  // see specs/015-reporting-dashboards/research.md §8.
+  REPORTING_DEFAULT_WINDOW_DAYS: z.coerce.number().default(30),
+  REPORTING_SLA_RISK_THRESHOLD_MINUTES: z.coerce.number().default(60),
+  REPORTING_TOP_N_LIMIT: z.coerce.number().default(10),
 });
 
 export type EnvConfig = z.infer<typeof envSchema>;
diff --git a/src/config/index.ts b/src/config/index.ts
index 015f344..082a129 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -7,3 +7,4 @@ export * from './ai';
 export * from './orchestration';
 export * from './problem-resolution';
 export * from './auth';
+export * from './reporting';
diff --git a/src/config/reporting.ts b/src/config/reporting.ts
new file mode 100644
index 0000000..131cb8e
--- /dev/null
+++ b/src/config/reporting.ts
@@ -0,0 +1,7 @@
+import { env } from './env';
+
+export const reportingConfig = {
+  defaultWindowDays: env.REPORTING_DEFAULT_WINDOW_DAYS,
+  slaRiskThresholdMinutes: env.REPORTING_SLA_RISK_THRESHOLD_MINUTES,
+  topNLimit: env.REPORTING_TOP_N_LIMIT,
+};
diff --git a/src/modules/ai-support/knowledge/repository/error-code-lookup.repository.ts b/src/modules/ai-support/knowledge/repository/error-code-lookup.repository.ts
new file mode 100644
index 0000000..b80ae3b
--- /dev/null
+++ b/src/modules/ai-support/knowledge/repository/error-code-lookup.repository.ts
@@ -0,0 +1,31 @@
+import { prismaClient } from '@/infrastructure/database';
+import { ErrorCodeLookup } from '@prisma/client';
+
+/**
+ * 015-reporting-dashboards research.md §6: a durable, append-only audit row — no update/delete
+ * path, every lookup is its own row, duplicates over time are the point (frequency is what
+ * "top errors" measures).
+ */
+export class ErrorCodeLookupRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  async create(errorCodeId: string, productId: string): Promise<ErrorCodeLookup> {
+    return this.prisma.errorCodeLookup.create({ data: { errorCodeId, productId } });
+  }
+
+  async countByCodeForProduct(
+    productId: string,
+    from: Date,
+    to: Date,
+  ): Promise<Array<{ errorCodeId: string; count: number }>> {
+    const grouped = await this.prisma.errorCodeLookup.groupBy({
+      by: ['errorCodeId'],
+      where: { productId, createdAt: { gte: from, lte: to } },
+      _count: { errorCodeId: true },
+      orderBy: { _count: { errorCodeId: 'desc' } },
+    });
+    return grouped.map((g) => ({ errorCodeId: g.errorCodeId, count: g._count.errorCodeId }));
+  }
+}
+
+export const errorCodeLookupRepository = new ErrorCodeLookupRepository();
diff --git a/src/modules/ai-support/knowledge/repository/error-codes.repository.ts b/src/modules/ai-support/knowledge/repository/error-codes.repository.ts
index a4fe1dd..314ddba 100644
--- a/src/modules/ai-support/knowledge/repository/error-codes.repository.ts
+++ b/src/modules/ai-support/knowledge/repository/error-codes.repository.ts
@@ -13,6 +13,10 @@ export class ErrorCodesRepository {
       where: { productId_code: { productId, code } },
     });
   }
+
+  async findById(id: string): Promise<ErrorCode | null> {
+    return this.prisma.errorCode.findUnique({ where: { id } });
+  }
 }
 
 export const errorCodesRepository = new ErrorCodesRepository();
diff --git a/src/modules/ai-support/knowledge/repository/index.ts b/src/modules/ai-support/knowledge/repository/index.ts
index 1c813d1..ea0ba04 100644
--- a/src/modules/ai-support/knowledge/repository/index.ts
+++ b/src/modules/ai-support/knowledge/repository/index.ts
@@ -1,4 +1,5 @@
 export * from './knowledge.repository';
 export * from './error-codes.repository';
+export * from './error-code-lookup.repository';
 export * from './known-issues.repository';
 export * from './runbooks.repository';
diff --git a/src/modules/ai-support/knowledge/service/error-codes.service.ts b/src/modules/ai-support/knowledge/service/error-codes.service.ts
index 5ce039e..2a59f56 100644
--- a/src/modules/ai-support/knowledge/service/error-codes.service.ts
+++ b/src/modules/ai-support/knowledge/service/error-codes.service.ts
@@ -4,6 +4,8 @@ import { knownErrorLookupsCounter } from '@/infrastructure/observability';
 import {
   errorCodesRepository,
   ErrorCodesRepository,
+  errorCodeLookupRepository,
+  ErrorCodeLookupRepository,
   knownIssuesRepository,
   KnownIssuesRepository,
   CreateKnownIssueData,
@@ -13,6 +15,7 @@ export class ErrorCodesService {
   constructor(
     private readonly errorCodesRepo: ErrorCodesRepository = errorCodesRepository,
     private readonly knownIssuesRepo: KnownIssuesRepository = knownIssuesRepository,
+    private readonly lookupsRepo: ErrorCodeLookupRepository = errorCodeLookupRepository,
   ) {}
 
   async createErrorCode(productId: string, code: string, description: string): Promise<ErrorCode> {
@@ -28,12 +31,36 @@ export class ErrorCodesService {
     const errorCode = await this.errorCodesRepo.findByCode(productId, code);
     if (!errorCode) throw new NotFoundError('Error code not found.');
 
-    // 014-full-observability data-model.md #9: "most common errors" — a raw counter, ranked by
-    // an external monitoring stack (FR-009), counted only once the code is confirmed real.
+    // 014-full-observability data-model.md #9: "most common errors" — a raw, process-lifetime
+    // counter for a live monitoring stack (FR-009 there), counted only once the code is
+    // confirmed real.
     knownErrorLookupsCounter.inc({ code });
+    // 015-reporting-dashboards research.md §6: the durable counterpart — the live counter above
+    // resets on every restart, so a historical "top errors" report needs its own audit row.
+    await this.lookupsRepo.create(errorCode.id, productId);
 
     return this.knownIssuesRepo.findByErrorCodeId(errorCode.id);
   }
+
+  /** 015-reporting-dashboards: the Product dashboard's "top errors" ranking — encapsulated here
+   * (not exposed as raw repository access) since resolving a lookup count back to its error
+   * code's own `code` string is this module's own concern, not the reports module's. */
+  async getTopErrorCodesForProduct(
+    productId: string,
+    from: Date,
+    to: Date,
+    limit: number,
+  ): Promise<Array<{ code: string; count: number }>> {
+    const ranked = await this.lookupsRepo.countByCodeForProduct(productId, from, to);
+    const top = ranked.slice(0, limit);
+    const rows = await Promise.all(
+      top.map(async (row) => {
+        const errorCode = await this.errorCodesRepo.findById(row.errorCodeId);
+        return { code: errorCode?.code ?? row.errorCodeId, count: row.count };
+      }),
+    );
+    return rows;
+  }
 }
 
 export const errorCodesService = new ErrorCodesService();
diff --git a/src/modules/ai-support/sessions/index.ts b/src/modules/ai-support/sessions/index.ts
index 401b46e..b1f681b 100644
--- a/src/modules/ai-support/sessions/index.ts
+++ b/src/modules/ai-support/sessions/index.ts
@@ -3,11 +3,20 @@ export { SessionsService, sessionsService } from './service';
 export type { SessionTurnResult } from './service';
 export { ConfidencePolicyService, confidencePolicyService } from './service';
 export type { ResolvedConfidencePolicy } from './service';
+// 015-reporting-dashboards research.md §7: reused for the AI dashboard's confidence
+// distribution, not reimplemented.
+export { decideConfidenceBand } from './service';
+export type { ConfidenceBand } from './service';
 export {
   sessionRepository,
   SessionRepository,
   diagnosisRepository,
   DiagnosisRepository,
+  // 015-reporting-dashboards: test setup needs to record a session's knowledge references
+  // directly, the same "extend an existing module's public surface for a later feature"
+  // precedent as 004's productsRepository/009's problemsRepository.
+  knowledgeReferenceRepository,
+  KnowledgeReferenceRepository,
 } from './repository';
 export { ACTIVE_SESSION_STATUSES, TERMINAL_SESSION_STATUSES } from './mapper';
 export type { SessionStatus } from './mapper';
diff --git a/src/modules/platform/reports/controller/index.ts b/src/modules/platform/reports/controller/index.ts
new file mode 100644
index 0000000..162f9a5
--- /dev/null
+++ b/src/modules/platform/reports/controller/index.ts
@@ -0,0 +1 @@
+export * from './reports.controller';
diff --git a/src/modules/platform/reports/controller/reports.controller.ts b/src/modules/platform/reports/controller/reports.controller.ts
new file mode 100644
index 0000000..0a23eb1
--- /dev/null
+++ b/src/modules/platform/reports/controller/reports.controller.ts
@@ -0,0 +1,39 @@
+import { FastifyReply, FastifyRequest } from 'fastify';
+import { reportsService, ReportsService } from '../service';
+import { dateRangeQuerySchema } from '../schema';
+import { resolveDateRange } from '../mapper';
+
+export class ReportsController {
+  constructor(private readonly service: ReportsService = reportsService) {}
+
+  async getManagementDashboard(request: FastifyRequest, reply: FastifyReply) {
+    const query = dateRangeQuerySchema.parse(request.query);
+    const range = resolveDateRange(query);
+    const dashboard = await this.service.getManagementDashboard(range);
+    return reply.status(200).send({ success: true, data: dashboard, meta: null });
+  }
+
+  async getProductDashboard(request: FastifyRequest, reply: FastifyReply) {
+    const { externalProductId } = request.params as { externalProductId: string };
+    const query = dateRangeQuerySchema.parse(request.query);
+    const range = resolveDateRange(query);
+    const dashboard = await this.service.getProductDashboard(externalProductId, range);
+    return reply.status(200).send({ success: true, data: dashboard, meta: null });
+  }
+
+  async getSupportDashboard(request: FastifyRequest, reply: FastifyReply) {
+    const query = dateRangeQuerySchema.parse(request.query);
+    const range = resolveDateRange(query);
+    const dashboard = await this.service.getSupportDashboard(range);
+    return reply.status(200).send({ success: true, data: dashboard, meta: null });
+  }
+
+  async getAiDashboard(request: FastifyRequest, reply: FastifyReply) {
+    const query = dateRangeQuerySchema.parse(request.query);
+    const range = resolveDateRange(query);
+    const dashboard = await this.service.getAiDashboard(range);
+    return reply.status(200).send({ success: true, data: dashboard, meta: null });
+  }
+}
+
+export const reportsController = new ReportsController();
diff --git a/src/modules/platform/reports/index.ts b/src/modules/platform/reports/index.ts
index c0e435d..a5af1b5 100644
--- a/src/modules/platform/reports/index.ts
+++ b/src/modules/platform/reports/index.ts
@@ -1,11 +1,8 @@
-export const REPORTS_CONSTANTS = {
-  MODULE_NAME: 'PLATFORM_REPORTS',
-} as const;
-
-export class ReportsService {
-  async generateSummaryReport(): Promise<Record<string, unknown>> {
-    return {};
-  }
-}
-
-export const reportsService = new ReportsService();
+export { reportsRoutes } from './routes';
+export { ReportsService, reportsService } from './service';
+export type {
+  ManagementDashboard,
+  ProductDashboard,
+  SupportDashboard,
+  AiDashboard,
+} from './service';
diff --git a/src/modules/platform/reports/mapper/date-range.ts b/src/modules/platform/reports/mapper/date-range.ts
new file mode 100644
index 0000000..c9175a4
--- /dev/null
+++ b/src/modules/platform/reports/mapper/date-range.ts
@@ -0,0 +1,39 @@
+import { ValidationError } from '@/common/errors';
+import { reportingConfig } from '@/config';
+
+export interface DateRange {
+  from: Date;
+  to: Date;
+}
+
+/**
+ * 015-reporting-dashboards data-model.md "Query Parameters": both ends optional — `to` defaults
+ * to now, `from` defaults to `to - reportingConfig.defaultWindowDays`. `from > to` is a
+ * ValidationError (spec.md Edge Cases), never silently swapped or silently returning empty data.
+ */
+export function resolveDateRange(query: {
+  from?: string | undefined;
+  to?: string | undefined;
+}): DateRange {
+  const to = query.to ? new Date(query.to) : new Date();
+  if (Number.isNaN(to.getTime())) {
+    throw new ValidationError('"to" is not a valid date.');
+  }
+
+  const from = query.from
+    ? new Date(query.from)
+    : new Date(to.getTime() - reportingConfig.defaultWindowDays * 24 * 60 * 60 * 1000);
+  if (Number.isNaN(from.getTime())) {
+    throw new ValidationError('"from" is not a valid date.');
+  }
+
+  if (from > to) {
+    throw new ValidationError('"from" must not be after "to".');
+  }
+
+  return { from, to };
+}
+
+export function serializeDateRange(range: DateRange): { from: string; to: string } {
+  return { from: range.from.toISOString(), to: range.to.toISOString() };
+}
diff --git a/src/modules/platform/reports/mapper/durations.ts b/src/modules/platform/reports/mapper/durations.ts
new file mode 100644
index 0000000..83745f1
--- /dev/null
+++ b/src/modules/platform/reports/mapper/durations.ts
@@ -0,0 +1,14 @@
+interface TicketWithFirstAgentMessage {
+  createdAt: Date;
+  messages: Array<{ createdAt: Date }>;
+}
+
+/** Shared by ManagementRepository and SupportRepository — both need "ticket createdAt -> its
+ * first AGENT_MESSAGE createdAt" in milliseconds, for tickets that actually have one. */
+export function extractFirstResponseDurationsMs(tickets: TicketWithFirstAgentMessage[]): number[] {
+  return tickets.flatMap((t) => {
+    const firstAgentMessage = t.messages[0];
+    if (!firstAgentMessage) return [];
+    return [firstAgentMessage.createdAt.getTime() - t.createdAt.getTime()];
+  });
+}
diff --git a/src/modules/platform/reports/mapper/index.ts b/src/modules/platform/reports/mapper/index.ts
new file mode 100644
index 0000000..c39414b
--- /dev/null
+++ b/src/modules/platform/reports/mapper/index.ts
@@ -0,0 +1,3 @@
+export * from './date-range';
+export * from './rate';
+export * from './durations';
diff --git a/src/modules/platform/reports/mapper/rate.ts b/src/modules/platform/reports/mapper/rate.ts
new file mode 100644
index 0000000..9c3c40b
--- /dev/null
+++ b/src/modules/platform/reports/mapper/rate.ts
@@ -0,0 +1,16 @@
+/**
+ * 015-reporting-dashboards research.md §3: every rate/average is `number | null` — `null` means
+ * "no qualifying data in range," distinguished from a genuine `0` (e.g. a real 0% AI resolution
+ * rate is meaningful; "nobody's data exists yet" is not the same thing). Never computed as
+ * `numerator / 0`, which would silently produce `NaN`.
+ */
+export function computeRate(numerator: number, denominator: number): number | null {
+  if (denominator === 0) return null;
+  return numerator / denominator;
+}
+
+export function computeAverageSeconds(durationsMs: number[]): number | null {
+  if (durationsMs.length === 0) return null;
+  const totalMs = durationsMs.reduce((sum, ms) => sum + ms, 0);
+  return totalMs / durationsMs.length / 1000;
+}
diff --git a/src/modules/platform/reports/repository/ai.repository.ts b/src/modules/platform/reports/repository/ai.repository.ts
new file mode 100644
index 0000000..7fc25ae
--- /dev/null
+++ b/src/modules/platform/reports/repository/ai.repository.ts
@@ -0,0 +1,74 @@
+import { prismaClient } from '@/infrastructure/database';
+import { DateRange } from '../mapper';
+
+export class AiRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  async sessionOutcomeCounts(
+    range: DateRange,
+  ): Promise<{ resolved: number; escalated: number; total: number }> {
+    const [resolved, escalated, total] = await Promise.all([
+      this.prisma.aISupportSession.count({
+        where: { startedAt: { gte: range.from, lte: range.to }, status: 'resolved' },
+      }),
+      this.prisma.aISupportSession.count({
+        where: {
+          startedAt: { gte: range.from, lte: range.to },
+          status: { in: ['escalated', 'ended_by_agent'] },
+        },
+      }),
+      this.prisma.aISupportSession.count({
+        where: { startedAt: { gte: range.from, lte: range.to } },
+      }),
+    ]);
+    return { resolved, escalated, total };
+  }
+
+  /**
+   * "Failed troubleshooting then escalated" (spec.md User Story 4) has no single stored flag —
+   * classifyStepOutcome's own verdicts aren't persisted as a durable per-step record. Documented
+   * proxy: an escalated session that made at least one tool call (toolCallCount > 0) attempted
+   * troubleshooting before giving up, vs. one that escalated immediately with zero attempts.
+   */
+  async escalatedSessionsWithToolAttempts(range: DateRange): Promise<number> {
+    return this.prisma.aISupportSession.count({
+      where: {
+        startedAt: { gte: range.from, lte: range.to },
+        status: { in: ['escalated', 'ended_by_agent'] },
+        toolCallCount: { gt: 0 },
+      },
+    });
+  }
+
+  async sessionsWithKnowledgeMatch(range: DateRange): Promise<number> {
+    const sessions = await this.prisma.aISupportSession.findMany({
+      where: { startedAt: { gte: range.from, lte: range.to } },
+      select: { knowledgeRefs: { select: { id: true }, take: 1 } },
+    });
+    return sessions.filter((s) => s.knowledgeRefs.length > 0).length;
+  }
+
+  async diagnosisConfidences(range: DateRange): Promise<number[]> {
+    const diagnoses = await this.prisma.aIDiagnosis.findMany({
+      where: { createdAt: { gte: range.from, lte: range.to } },
+      select: { confidence: true },
+    });
+    return diagnoses.map((d) => d.confidence);
+  }
+
+  async toolInvocationOutcomeCounts(
+    range: DateRange,
+  ): Promise<{ success: number; failed: number }> {
+    const [success, failed] = await Promise.all([
+      this.prisma.aIActionResult.count({
+        where: { status: 'success', createdAt: { gte: range.from, lte: range.to } },
+      }),
+      this.prisma.aIActionResult.count({
+        where: { status: 'failed', createdAt: { gte: range.from, lte: range.to } },
+      }),
+    ]);
+    return { success, failed };
+  }
+}
+
+export const aiRepository = new AiRepository();
diff --git a/src/modules/platform/reports/repository/index.ts b/src/modules/platform/reports/repository/index.ts
new file mode 100644
index 0000000..7a15ae8
--- /dev/null
+++ b/src/modules/platform/reports/repository/index.ts
@@ -0,0 +1,5 @@
+export * from './management.repository';
+export * from './product.repository';
+export * from './support.repository';
+export * from './ai.repository';
+export * from './shared.repository';
diff --git a/src/modules/platform/reports/repository/management.repository.ts b/src/modules/platform/reports/repository/management.repository.ts
new file mode 100644
index 0000000..4f57a3e
--- /dev/null
+++ b/src/modules/platform/reports/repository/management.repository.ts
@@ -0,0 +1,76 @@
+import { prismaClient } from '@/infrastructure/database';
+import { DateRange } from '../mapper';
+
+export class ManagementRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  async totalCases(range: DateRange): Promise<number> {
+    return this.prisma.ticket.count({
+      where: { createdAt: { gte: range.from, lte: range.to } },
+    });
+  }
+
+  async countByStatus(range: DateRange, statuses: string[]): Promise<number> {
+    return this.prisma.ticket.count({
+      where: { createdAt: { gte: range.from, lte: range.to }, status: { in: statuses } },
+    });
+  }
+
+  /** Ever reached HUMAN_ESCALATION — the state machine (003-ticketing) makes this a one-way
+   * gate, so a ticket currently past it (IN_PROGRESS, WAITING_FOR_CUSTOMER, etc.) still counts. */
+  async countEverEscalatedToHuman(range: DateRange): Promise<number> {
+    return this.prisma.ticket.count({
+      where: {
+        createdAt: { gte: range.from, lte: range.to },
+        status: {
+          in: [
+            'HUMAN_ESCALATION',
+            'IN_PROGRESS',
+            'WAITING_FOR_CUSTOMER',
+            'RESOLUTION_PENDING_CUSTOMER',
+            'RESOLVED',
+            'CLOSED',
+            'REOPENED',
+          ],
+        },
+      },
+    });
+  }
+
+  /** research.md §4: `Resolution.resolvedBy` is the single source of truth for AI vs. human. */
+  async countResolutionsBy(range: DateRange, resolvedByAi: boolean): Promise<number> {
+    return this.prisma.resolution.count({
+      where: {
+        resolvedAt: { gte: range.from, lte: range.to },
+        resolvedBy: resolvedByAi ? 'ai' : { not: 'ai' },
+      },
+    });
+  }
+
+  async slaOutcomeCounts(range: DateRange): Promise<{ met: number; breached: number }> {
+    const [met, breached] = await Promise.all([
+      this.prisma.sLARun.count({
+        where: {
+          ticket: { createdAt: { gte: range.from, lte: range.to } },
+          status: 'completed',
+          breachedAt: null,
+        },
+      }),
+      this.prisma.sLARun.count({
+        where: {
+          ticket: { createdAt: { gte: range.from, lte: range.to } },
+          breachedAt: { not: null },
+        },
+      }),
+    ]);
+    return { met, breached };
+  }
+
+  async escalationCount(range: DateRange): Promise<number> {
+    return this.prisma.escalationEvent.count({
+      where: { createdAt: { gte: range.from, lte: range.to } },
+    });
+  }
+}
+
+export const managementRepository = new ManagementRepository();
diff --git a/src/modules/platform/reports/repository/product.repository.ts b/src/modules/platform/reports/repository/product.repository.ts
new file mode 100644
index 0000000..bfb4870
--- /dev/null
+++ b/src/modules/platform/reports/repository/product.repository.ts
@@ -0,0 +1,66 @@
+import { prismaClient } from '@/infrastructure/database';
+import { DateRange } from '../mapper';
+
+// Named ProductReportRepository (not ProductRepository) to avoid colliding with
+// catalog/products' own ProductsRepository, which this module reuses (via its public index) for
+// resolving externalProductId -> Product rather than duplicating that lookup here.
+export class ProductReportRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  async supportVolume(productId: string, range: DateRange): Promise<number> {
+    return this.prisma.ticket.count({
+      where: { productId, createdAt: { gte: range.from, lte: range.to } },
+    });
+  }
+
+  async problemsByCategory(
+    productId: string,
+    range: DateRange,
+  ): Promise<Array<{ categoryId: string | null; count: number }>> {
+    const grouped = await this.prisma.problem.groupBy({
+      by: ['categoryId'],
+      where: { productId, createdAt: { gte: range.from, lte: range.to } },
+      _count: { categoryId: true },
+      orderBy: { _count: { categoryId: 'desc' } },
+    });
+    return grouped.map((g) => ({ categoryId: g.categoryId, count: g._count.categoryId }));
+  }
+
+  async countResolutionsBy(
+    productId: string,
+    range: DateRange,
+    resolvedByAi: boolean,
+  ): Promise<number> {
+    return this.prisma.resolution.count({
+      where: {
+        resolvedAt: { gte: range.from, lte: range.to },
+        resolvedBy: resolvedByAi ? 'ai' : { not: 'ai' },
+        ticket: { productId },
+      },
+    });
+  }
+
+  /** Same "ever reached HUMAN_ESCALATION" one-way-gate logic as
+   * ManagementRepository.countEverEscalatedToHuman, scoped to one product. */
+  async countEverEscalatedToHuman(productId: string, range: DateRange): Promise<number> {
+    return this.prisma.ticket.count({
+      where: {
+        productId,
+        createdAt: { gte: range.from, lte: range.to },
+        status: {
+          in: [
+            'HUMAN_ESCALATION',
+            'IN_PROGRESS',
+            'WAITING_FOR_CUSTOMER',
+            'RESOLUTION_PENDING_CUSTOMER',
+            'RESOLVED',
+            'CLOSED',
+            'REOPENED',
+          ],
+        },
+      },
+    });
+  }
+}
+
+export const productReportRepository = new ProductReportRepository();
diff --git a/src/modules/platform/reports/repository/shared.repository.ts b/src/modules/platform/reports/repository/shared.repository.ts
new file mode 100644
index 0000000..7ffaf79
--- /dev/null
+++ b/src/modules/platform/reports/repository/shared.repository.ts
@@ -0,0 +1,34 @@
+import { prismaClient } from '@/infrastructure/database';
+import { DateRange, extractFirstResponseDurationsMs } from '../mapper';
+
+/** Response/resolution duration queries the Management and Support dashboards both need
+ * identically — composed by each, not duplicated. */
+export class SharedReportRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  async firstResponseDurationsMs(range: DateRange): Promise<number[]> {
+    const tickets = await this.prisma.ticket.findMany({
+      where: { createdAt: { gte: range.from, lte: range.to } },
+      select: {
+        createdAt: true,
+        messages: {
+          where: { type: 'AGENT_MESSAGE' },
+          orderBy: { createdAt: 'asc' },
+          take: 1,
+          select: { createdAt: true },
+        },
+      },
+    });
+    return extractFirstResponseDurationsMs(tickets);
+  }
+
+  async resolutionDurationsMs(range: DateRange): Promise<number[]> {
+    const resolutions = await this.prisma.resolution.findMany({
+      where: { resolvedAt: { gte: range.from, lte: range.to } },
+      select: { resolvedAt: true, ticket: { select: { createdAt: true } } },
+    });
+    return resolutions.map((r) => r.resolvedAt.getTime() - r.ticket.createdAt.getTime());
+  }
+}
+
+export const sharedReportRepository = new SharedReportRepository();
diff --git a/src/modules/platform/reports/repository/support.repository.ts b/src/modules/platform/reports/repository/support.repository.ts
new file mode 100644
index 0000000..08f80ca
--- /dev/null
+++ b/src/modules/platform/reports/repository/support.repository.ts
@@ -0,0 +1,40 @@
+import { prismaClient } from '@/infrastructure/database';
+import { DateRange } from '../mapper';
+
+export class SupportRepository {
+  constructor(private readonly prisma = prismaClient) {}
+
+  /** research.md §2: current, point-in-time — not range-scoped. "How much work is assigned
+   * right now," not a historical count. */
+  async workloadByAgent(): Promise<Array<{ agentId: string; openAssignments: number }>> {
+    const grouped = await this.prisma.assignment.groupBy({
+      by: ['agentId'],
+      where: { isCurrent: true },
+      _count: { agentId: true },
+    });
+    return grouped.map((g) => ({ agentId: g.agentId, openAssignments: g._count.agentId }));
+  }
+
+  async slaAtRisk(thresholdMinutes: number): Promise<number> {
+    const now = new Date();
+    const riskCutoff = new Date(now.getTime() + thresholdMinutes * 60 * 1000);
+    return this.prisma.sLARun.count({
+      where: {
+        status: 'running',
+        resolutionDueAt: { gte: now, lte: riskCutoff },
+      },
+    });
+  }
+
+  async slaBreached(): Promise<number> {
+    return this.prisma.sLARun.count({ where: { status: 'breached' } });
+  }
+
+  async escalationCount(range: DateRange): Promise<number> {
+    return this.prisma.escalationEvent.count({
+      where: { createdAt: { gte: range.from, lte: range.to } },
+    });
+  }
+}
+
+export const supportRepository = new SupportRepository();
diff --git a/src/modules/platform/reports/routes/index.ts b/src/modules/platform/reports/routes/index.ts
new file mode 100644
index 0000000..d0e427e
--- /dev/null
+++ b/src/modules/platform/reports/routes/index.ts
@@ -0,0 +1 @@
+export * from './reports.routes';
diff --git a/src/modules/platform/reports/routes/reports.routes.ts b/src/modules/platform/reports/routes/reports.routes.ts
new file mode 100644
index 0000000..cc6ed24
--- /dev/null
+++ b/src/modules/platform/reports/routes/reports.routes.ts
@@ -0,0 +1,28 @@
+import { FastifyInstance } from 'fastify';
+import { requireRole } from '@/modules/identity/auth';
+import { reportsController } from '../controller';
+
+/** contracts/reports-api-contract.md: every dashboard is admin-only, the same gate every other
+ * admin-only surface uses since 010-identity-auth. */
+export async function reportsRoutes(fastify: FastifyInstance): Promise<void> {
+  fastify.get(
+    '/admin/reports/management',
+    { preHandler: [fastify.authenticate, requireRole('ADMIN')] },
+    (req, reply) => reportsController.getManagementDashboard(req, reply),
+  );
+  fastify.get(
+    '/admin/reports/product/:externalProductId',
+    { preHandler: [fastify.authenticate, requireRole('ADMIN')] },
+    (req, reply) => reportsController.getProductDashboard(req, reply),
+  );
+  fastify.get(
+    '/admin/reports/support',
+    { preHandler: [fastify.authenticate, requireRole('ADMIN')] },
+    (req, reply) => reportsController.getSupportDashboard(req, reply),
+  );
+  fastify.get(
+    '/admin/reports/ai',
+    { preHandler: [fastify.authenticate, requireRole('ADMIN')] },
+    (req, reply) => reportsController.getAiDashboard(req, reply),
+  );
+}
diff --git a/src/modules/platform/reports/schema/index.ts b/src/modules/platform/reports/schema/index.ts
new file mode 100644
index 0000000..55cc490
--- /dev/null
+++ b/src/modules/platform/reports/schema/index.ts
@@ -0,0 +1 @@
+export * from './reports.schema';
diff --git a/src/modules/platform/reports/schema/reports.schema.ts b/src/modules/platform/reports/schema/reports.schema.ts
new file mode 100644
index 0000000..3fe248f
--- /dev/null
+++ b/src/modules/platform/reports/schema/reports.schema.ts
@@ -0,0 +1,10 @@
+import { z } from 'zod';
+
+export const dateRangeQuerySchema = z
+  .object({
+    from: z.string().optional(),
+    to: z.string().optional(),
+  })
+  .strict();
+
+export type DateRangeQuery = z.infer<typeof dateRangeQuerySchema>;
diff --git a/src/modules/platform/reports/service/index.ts b/src/modules/platform/reports/service/index.ts
new file mode 100644
index 0000000..2a546dc
--- /dev/null
+++ b/src/modules/platform/reports/service/index.ts
@@ -0,0 +1 @@
+export * from './reports.service';
diff --git a/src/modules/platform/reports/service/reports.service.ts b/src/modules/platform/reports/service/reports.service.ts
new file mode 100644
index 0000000..dce9d3c
--- /dev/null
+++ b/src/modules/platform/reports/service/reports.service.ts
@@ -0,0 +1,219 @@
+import { NotFoundError } from '@/common/errors';
+import { reportingConfig, aiConfig } from '@/config';
+import { productsRepository, ProductsRepository } from '@/modules/catalog/products';
+import { decideConfidenceBand } from '@/modules/ai-support/sessions';
+import { errorCodesService, ErrorCodesService } from '@/modules/ai-support/knowledge';
+import {
+  managementRepository,
+  ManagementRepository,
+  productReportRepository,
+  ProductReportRepository,
+  supportRepository,
+  SupportRepository,
+  aiRepository,
+  AiRepository,
+  sharedReportRepository,
+  SharedReportRepository,
+} from '../repository';
+import { DateRange, serializeDateRange, computeRate, computeAverageSeconds } from '../mapper';
+
+export interface ManagementDashboard {
+  range: { from: string; to: string };
+  totalCases: number;
+  aiResolved: number;
+  humanEscalated: number;
+  resolved: number;
+  open: number;
+  slaCompliance: { met: number; breached: number; rate: number | null };
+  escalationCount: number;
+  averageResponseSeconds: number | null;
+  averageResolutionSeconds: number | null;
+}
+
+export interface ProductDashboard {
+  productId: string;
+  range: { from: string; to: string };
+  supportVolume: number;
+  problemsByCategory: Array<{ categoryId: string | null; count: number }>;
+  recurringProblems: Array<{ categoryId: string | null; count: number }>;
+  aiResolutionRate: number | null;
+  humanEscalationRate: number | null;
+  topErrors: Array<{ code: string; count: number }>;
+}
+
+export interface SupportDashboard {
+  generatedAt: string;
+  range: { from: string; to: string };
+  workloadByAgent: Array<{ agentId: string; openAssignments: number }>;
+  slaAtRisk: number;
+  slaBreached: number;
+  escalationCount: number;
+  averageResponseSeconds: number | null;
+  averageResolutionSeconds: number | null;
+}
+
+export interface AiDashboard {
+  range: { from: string; to: string };
+  totalSessions: number;
+  aiResolutionRate: number | null;
+  humanHandoffRate: number | null;
+  failedTroubleshootingEscalationRate: number | null;
+  knowledgeMatchRate: number | null;
+  confidenceDistribution: { proceed: number; ask: number; escalate: number };
+  toolInvocations: { success: number; failed: number };
+}
+
+const RESOLVED_STATUSES = ['RESOLVED', 'CLOSED'];
+
+export class ReportsService {
+  constructor(
+    private readonly management: ManagementRepository = managementRepository,
+    private readonly productReports: ProductReportRepository = productReportRepository,
+    private readonly support: SupportRepository = supportRepository,
+    private readonly ai: AiRepository = aiRepository,
+    private readonly products: ProductsRepository = productsRepository,
+    private readonly errorCodes: ErrorCodesService = errorCodesService,
+    private readonly shared: SharedReportRepository = sharedReportRepository,
+  ) {}
+
+  async getManagementDashboard(range: DateRange): Promise<ManagementDashboard> {
+    const [
+      totalCases,
+      aiResolved,
+      humanEscalated,
+      resolved,
+      slaOutcomes,
+      escalationCount,
+      responseDurations,
+      resolutionDurations,
+    ] = await Promise.all([
+      this.management.totalCases(range),
+      this.management.countResolutionsBy(range, true),
+      this.management.countEverEscalatedToHuman(range),
+      this.management.countByStatus(range, RESOLVED_STATUSES),
+      this.management.slaOutcomeCounts(range),
+      this.management.escalationCount(range),
+      this.shared.firstResponseDurationsMs(range),
+      this.shared.resolutionDurationsMs(range),
+    ]);
+
+    return {
+      range: serializeDateRange(range),
+      totalCases,
+      aiResolved,
+      humanEscalated,
+      resolved,
+      open: totalCases - resolved,
+      slaCompliance: {
+        met: slaOutcomes.met,
+        breached: slaOutcomes.breached,
+        rate: computeRate(slaOutcomes.met, slaOutcomes.met + slaOutcomes.breached),
+      },
+      escalationCount,
+      averageResponseSeconds: computeAverageSeconds(responseDurations),
+      averageResolutionSeconds: computeAverageSeconds(resolutionDurations),
+    };
+  }
+
+  async getProductDashboard(
+    externalProductId: string,
+    range: DateRange,
+  ): Promise<ProductDashboard> {
+    const product = await this.products.findByExternalProductId(externalProductId);
+    if (!product) throw new NotFoundError('Product not found.');
+
+    const [supportVolume, problemsByCategory, aiResolvedCount, humanEscalatedCount, topErrors] =
+      await Promise.all([
+        this.productReports.supportVolume(product.id, range),
+        this.productReports.problemsByCategory(product.id, range),
+        this.productReports.countResolutionsBy(product.id, range, true),
+        this.productReports.countEverEscalatedToHuman(product.id, range),
+        this.errorCodes.getTopErrorCodesForProduct(
+          product.id,
+          range.from,
+          range.to,
+          reportingConfig.topNLimit,
+        ),
+      ]);
+
+    const recurringProblems = [...problemsByCategory]
+      .sort((a, b) => b.count - a.count)
+      .slice(0, reportingConfig.topNLimit);
+
+    return {
+      productId: externalProductId,
+      range: serializeDateRange(range),
+      supportVolume,
+      problemsByCategory,
+      recurringProblems,
+      aiResolutionRate: computeRate(aiResolvedCount, supportVolume),
+      humanEscalationRate: computeRate(humanEscalatedCount, supportVolume),
+      topErrors,
+    };
+  }
+
+  async getSupportDashboard(range: DateRange): Promise<SupportDashboard> {
+    const [
+      workloadByAgent,
+      slaAtRisk,
+      slaBreached,
+      escalationCount,
+      responseDurations,
+      resolutionDurations,
+    ] = await Promise.all([
+      this.support.workloadByAgent(),
+      this.support.slaAtRisk(reportingConfig.slaRiskThresholdMinutes),
+      this.support.slaBreached(),
+      this.support.escalationCount(range),
+      this.shared.firstResponseDurationsMs(range),
+      this.shared.resolutionDurationsMs(range),
+    ]);
+
+    return {
+      generatedAt: new Date().toISOString(),
+      range: serializeDateRange(range),
+      workloadByAgent,
+      slaAtRisk,
+      slaBreached,
+      escalationCount,
+      averageResponseSeconds: computeAverageSeconds(responseDurations),
+      averageResolutionSeconds: computeAverageSeconds(resolutionDurations),
+    };
+  }
+
+  async getAiDashboard(range: DateRange): Promise<AiDashboard> {
+    const [outcomeCounts, escalatedWithAttempts, knowledgeMatches, confidences, toolCounts] =
+      await Promise.all([
+        this.ai.sessionOutcomeCounts(range),
+        this.ai.escalatedSessionsWithToolAttempts(range),
+        this.ai.sessionsWithKnowledgeMatch(range),
+        this.ai.diagnosisConfidences(range),
+        this.ai.toolInvocationOutcomeCounts(range),
+      ]);
+
+    const confidenceDistribution = { proceed: 0, ask: 0, escalate: 0 };
+    for (const confidence of confidences) {
+      const band = decideConfidenceBand(confidence, {
+        highThreshold: aiConfig.defaultHighConfidence,
+        lowThreshold: aiConfig.defaultLowConfidence,
+      });
+      confidenceDistribution[band] += 1;
+    }
+
+    return {
+      range: serializeDateRange(range),
+      totalSessions: outcomeCounts.total,
+      aiResolutionRate: computeRate(outcomeCounts.resolved, outcomeCounts.total),
+      humanHandoffRate: computeRate(outcomeCounts.escalated, outcomeCounts.total),
+      failedTroubleshootingEscalationRate: computeRate(
+        escalatedWithAttempts,
+        outcomeCounts.escalated,
+      ),
+      knowledgeMatchRate: computeRate(knowledgeMatches, outcomeCounts.total),
+      confidenceDistribution,
+      toolInvocations: toolCounts,
+    };
+  }
+}
+
+export const reportsService = new ReportsService();
diff --git a/tests/integration/known-issues.test.ts b/tests/integration/known-issues.test.ts
index c3143fc..4130557 100644
--- a/tests/integration/known-issues.test.ts
+++ b/tests/integration/known-issues.test.ts
@@ -21,6 +21,9 @@ describe('Error codes and known issues', () => {
 
   afterAll(async () => {
     await prismaClient.knownIssue.deleteMany({ where: { product: { externalProductId } } });
+    // 015-reporting-dashboards: findKnownIssuesByErrorCode now also writes a durable
+    // ErrorCodeLookup row (RESTRICT FK to ErrorCode) — must be deleted before ErrorCode itself.
+    await prismaClient.errorCodeLookup.deleteMany({ where: { product: { externalProductId } } });
     await prismaClient.errorCode.deleteMany({ where: { product: { externalProductId } } });
     await prismaClient.product.deleteMany({ where: { externalProductId } });
     await app.close();
diff --git a/tests/integration/platform-reports/ai-dashboard.test.ts b/tests/integration/platform-reports/ai-dashboard.test.ts
new file mode 100644
index 0000000..51307f4
--- /dev/null
+++ b/tests/integration/platform-reports/ai-dashboard.test.ts
@@ -0,0 +1,156 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { buildApp } from '@/app';
+import { prismaClient } from '@/infrastructure/database';
+import { FastifyInstance } from 'fastify';
+import { loginAs, authHeader } from '../../helpers/auth';
+import {
+  encryptCredential,
+  generateCredentialSecret,
+  issueIntegrationToken,
+} from '@/modules/catalog/products';
+import {
+  sessionRepository,
+  diagnosisRepository,
+  knowledgeReferenceRepository,
+} from '@/modules/ai-support/sessions';
+import { actionRepository } from '@/modules/ai-support/tools';
+import { aiConfig } from '@/config';
+
+/** Covers specs/015-reporting-dashboards/quickstart.md Scenario 4 against a real Postgres/Redis. */
+describe('AI dashboard (User Story 4)', () => {
+  let app: FastifyInstance;
+  let authToken: string;
+  const externalProductId = `TEST_AI_REPORT_PROD_${Date.now()}`;
+  let secret: string;
+  const rangeFrom = new Date(Date.now() - 60 * 60 * 1000).toISOString();
+  const rangeTo = new Date(Date.now() + 60 * 60 * 1000).toISOString();
+
+  beforeAll(async () => {
+    app = await buildApp();
+    authToken = await loginAs(app, 'ADMIN');
+
+    const product = await prismaClient.product.create({
+      data: { externalProductId, name: 'AI Report Test Product', status: 'active' },
+    });
+    secret = generateCredentialSecret();
+    await prismaClient.productIntegration.create({
+      data: {
+        productId: product.id,
+        credentialRef: encryptCredential(secret),
+        authMechanism: 'signed_token',
+        allowedScope: { tenantIds: ['tenant-1'] },
+        status: 'active',
+        rateLimitPerMinute: 1000,
+        rateLimitPerUserPerMinute: 1000,
+      },
+    });
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  async function createTicket(): Promise<string> {
+    const token = issueIntegrationToken(secret, {
+      externalProductId,
+      tenantId: 'tenant-1',
+      userId: 'user-1',
+    });
+    const created = await app.inject({
+      method: 'POST',
+      url: '/v1/support/requests',
+      headers: { authorization: `Bearer ${token}` },
+      payload: {
+        productId: externalProductId,
+        tenantId: 'tenant-1',
+        userId: 'user-1',
+        source: 'test',
+        problem: `AI report test ${Date.now()}-${Math.random()}`,
+      },
+    });
+    expect(created.statusCode).toBe(202);
+    return created.json().data.ticketId as string;
+  }
+
+  it('reflects real session outcomes, tool results, and confidence bands', async () => {
+    // A resolved session, with a knowledge match and a successful tool call.
+    const resolvedTicketId = await createTicket();
+    const resolvedSession = await sessionRepository.create(resolvedTicketId);
+    await knowledgeReferenceRepository.recordMany(resolvedSession.id, ['fake-knowledge-id']);
+    await diagnosisRepository.create({
+      sessionId: resolvedSession.id,
+      product: 'test-product',
+      problemType: 'test-problem',
+      severity: 'medium',
+      confidence: aiConfig.defaultHighConfidence,
+      possibleCauses: ['test cause'],
+    });
+    const successAction = await actionRepository.create({
+      sessionId: resolvedSession.id,
+      toolName: 'getTicketSnapshot',
+      input: {},
+      riskLevel: 'low',
+      evaluationOutcome: 'approved',
+    });
+    await actionRepository.createResult(successAction.id, { ok: true }, 'success');
+    await sessionRepository.updateStatus(resolvedSession.id, 'resolved');
+
+    // An escalated session, with a failed tool call and a low-confidence diagnosis.
+    const escalatedTicketId = await createTicket();
+    const escalatedSession = await sessionRepository.create(escalatedTicketId);
+    await diagnosisRepository.create({
+      sessionId: escalatedSession.id,
+      product: 'test-product',
+      problemType: 'test-problem',
+      severity: 'high',
+      confidence: aiConfig.defaultLowConfidence - 0.05,
+      possibleCauses: ['test cause'],
+    });
+    const failedAction = await actionRepository.create({
+      sessionId: escalatedSession.id,
+      toolName: 'getTicketSnapshot',
+      input: {},
+      riskLevel: 'low',
+      evaluationOutcome: 'approved',
+    });
+    await actionRepository.createResult(failedAction.id, { error: 'boom' }, 'failed');
+    await sessionRepository.updateStatus(escalatedSession.id, 'escalated');
+
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/ai?from=${rangeFrom}&to=${rangeTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const data = res.json().data;
+
+    expect(data.totalSessions).toBeGreaterThanOrEqual(2);
+    expect(data.aiResolutionRate).not.toBeNull();
+    expect(data.humanHandoffRate).not.toBeNull();
+    expect(data.knowledgeMatchRate).not.toBeNull();
+    expect(data.confidenceDistribution.proceed).toBeGreaterThanOrEqual(1);
+    expect(data.confidenceDistribution.escalate).toBeGreaterThanOrEqual(1);
+    expect(data.toolInvocations.success).toBeGreaterThanOrEqual(1);
+    expect(data.toolInvocations.failed).toBeGreaterThanOrEqual(1);
+  });
+
+  it('returns null rates and zero counts for a range with no AI activity', async () => {
+    const farPastFrom = new Date('2000-01-01').toISOString();
+    const farPastTo = new Date('2000-01-02').toISOString();
+
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/ai?from=${farPastFrom}&to=${farPastTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const data = res.json().data;
+
+    expect(data.totalSessions).toBe(0);
+    expect(data.aiResolutionRate).toBeNull();
+    expect(data.humanHandoffRate).toBeNull();
+    expect(data.knowledgeMatchRate).toBeNull();
+    expect(data.confidenceDistribution).toEqual({ proceed: 0, ask: 0, escalate: 0 });
+    expect(data.toolInvocations).toEqual({ success: 0, failed: 0 });
+  });
+});
diff --git a/tests/integration/platform-reports/management-dashboard.test.ts b/tests/integration/platform-reports/management-dashboard.test.ts
new file mode 100644
index 0000000..984d024
--- /dev/null
+++ b/tests/integration/platform-reports/management-dashboard.test.ts
@@ -0,0 +1,217 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { buildApp } from '@/app';
+import { prismaClient } from '@/infrastructure/database';
+import { FastifyInstance } from 'fastify';
+import { loginAs, authHeader } from '../../helpers/auth';
+import {
+  encryptCredential,
+  generateCredentialSecret,
+  issueIntegrationToken,
+} from '@/modules/catalog/products';
+import { ticketsRepository } from '@/modules/ticketing/tickets';
+import { messagesService } from '@/modules/ticketing/messages';
+import { resolutionRepository } from '@/modules/problem-management/resolutions';
+
+/**
+ * Covers specs/015-reporting-dashboards/quickstart.md Scenario 1 against a real Postgres/Redis.
+ * Drives ticket-status transitions directly through ticketsRepository (not ticketsService) to
+ * avoid publishing TICKET_UPDATED — this test only needs the raw persisted state its own
+ * aggregation queries read, and publishing real domain events here risks the same kind of
+ * cross-file contamination 014-full-observability's own business-metrics.test.ts found and fixed
+ * (an unscoped HUMAN_ESCALATION triggering real auto-assignment against the shared agent pool).
+ */
+describe('Management dashboard (User Story 1)', () => {
+  let app: FastifyInstance;
+  let authToken: string;
+  const externalProductId = `TEST_MGMT_REPORT_PROD_${Date.now()}`;
+  let productId: string;
+  let secret: string;
+  const rangeFrom = new Date(Date.now() - 60 * 60 * 1000).toISOString();
+  const rangeTo = new Date(Date.now() + 60 * 60 * 1000).toISOString();
+
+  beforeAll(async () => {
+    app = await buildApp();
+    authToken = await loginAs(app, 'ADMIN');
+
+    const product = await prismaClient.product.create({
+      data: { externalProductId, name: 'Management Report Test Product', status: 'active' },
+    });
+    productId = product.id;
+    secret = generateCredentialSecret();
+    await prismaClient.productIntegration.create({
+      data: {
+        productId,
+        credentialRef: encryptCredential(secret),
+        authMechanism: 'signed_token',
+        allowedScope: { tenantIds: ['tenant-1'] },
+        status: 'active',
+        rateLimitPerMinute: 1000,
+        rateLimitPerUserPerMinute: 1000,
+      },
+    });
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  async function createTicket(): Promise<string> {
+    const token = issueIntegrationToken(secret, {
+      externalProductId,
+      tenantId: 'tenant-1',
+      userId: 'user-1',
+    });
+    const created = await app.inject({
+      method: 'POST',
+      url: '/v1/support/requests',
+      headers: { authorization: `Bearer ${token}` },
+      payload: {
+        productId: externalProductId,
+        tenantId: 'tenant-1',
+        userId: 'user-1',
+        source: 'test',
+        problem: `Management report test ${Date.now()}-${Math.random()}`,
+      },
+    });
+    expect(created.statusCode).toBe(202);
+    return created.json().data.ticketId as string;
+  }
+
+  async function driveDirectly(ticketId: string, statuses: string[]): Promise<void> {
+    let ticket = await prismaClient.ticket.findUniqueOrThrow({ where: { id: ticketId } });
+    for (const status of statuses) {
+      const updated = await ticketsRepository.updateStatus(ticketId, status, ticket.version);
+      if (!updated) throw new Error(`Failed to transition ticket to ${status} in test setup.`);
+      ticket = updated;
+    }
+  }
+
+  it('reports real figures matching the actual created data', async () => {
+    // AI-resolved ticket.
+    const aiTicketId = await createTicket();
+    await driveDirectly(aiTicketId, [
+      'AI_ANALYZING',
+      'AI_TROUBLESHOOTING',
+      'AI_VERIFYING',
+      'AI_RESOLVED',
+    ]);
+    await resolutionRepository.create({ ticketId: aiTicketId, outcome: 'fixed', resolvedBy: 'ai' });
+    await driveDirectly(aiTicketId, ['RESOLVED']);
+
+    // Human-resolved ticket, with a first agent response recorded.
+    const humanTicketId = await createTicket();
+    await messagesService.post(humanTicketId, 'agent-1', 'AGENT_MESSAGE', 'Looking into this.');
+    await driveDirectly(humanTicketId, [
+      'HUMAN_ESCALATION',
+      'IN_PROGRESS',
+      'RESOLUTION_PENDING_CUSTOMER',
+    ]);
+    await resolutionRepository.create({
+      ticketId: humanTicketId,
+      outcome: 'fixed',
+      resolvedBy: 'agent-1',
+    });
+    await driveDirectly(humanTicketId, ['RESOLVED']);
+
+    // Still-open ticket.
+    await createTicket();
+
+    // SLA policy + one met, one breached run.
+    const policy = await prismaClient.sLAPolicy.create({
+      data: {
+        name: `Mgmt Report Policy ${Date.now()}`,
+        productId,
+        firstResponseMinutes: 30,
+        resolutionMinutes: 240,
+      },
+    });
+    const metTicketId = await createTicket();
+    await prismaClient.sLARun.create({
+      data: {
+        ticketId: metTicketId,
+        policyId: policy.id,
+        firstResponseDueAt: new Date(Date.now() + 30 * 60_000),
+        resolutionDueAt: new Date(Date.now() + 240 * 60_000),
+        status: 'completed',
+        completedAt: new Date(),
+      },
+    });
+    const breachedTicketId = await createTicket();
+    await prismaClient.sLARun.create({
+      data: {
+        ticketId: breachedTicketId,
+        policyId: policy.id,
+        firstResponseDueAt: new Date(Date.now() + 30 * 60_000),
+        resolutionDueAt: new Date(Date.now() - 60_000),
+        status: 'breached',
+        breachedAt: new Date(),
+      },
+    });
+
+    // One escalation event.
+    const escalatedTicketId = await createTicket();
+    await prismaClient.escalationEvent.create({
+      data: {
+        ticketId: escalatedTicketId,
+        ruleId: null,
+        fromNodeId: null,
+        toNodeId: null,
+        reason: 'management dashboard test',
+        triggeredBy: 'system',
+      },
+    });
+
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/management?from=${rangeFrom}&to=${rangeTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const data = res.json().data;
+
+    expect(data.totalCases).toBeGreaterThanOrEqual(6);
+    expect(data.aiResolved).toBeGreaterThanOrEqual(1);
+    expect(data.humanEscalated).toBeGreaterThanOrEqual(1);
+    expect(data.resolved).toBeGreaterThanOrEqual(2);
+    expect(data.open).toBeGreaterThanOrEqual(1);
+    expect(data.slaCompliance.met).toBeGreaterThanOrEqual(1);
+    expect(data.slaCompliance.breached).toBeGreaterThanOrEqual(1);
+    expect(data.slaCompliance.rate).not.toBeNull();
+    expect(data.escalationCount).toBeGreaterThanOrEqual(1);
+    expect(data.averageResponseSeconds).not.toBeNull();
+    expect(data.averageResolutionSeconds).not.toBeNull();
+    expect(data.range.from).toBeTruthy();
+    expect(data.range.to).toBeTruthy();
+  });
+
+  it('returns all-zero counts and all-null rates for a range with no activity', async () => {
+    const farPastFrom = new Date('2000-01-01').toISOString();
+    const farPastTo = new Date('2000-01-02').toISOString();
+
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/management?from=${farPastFrom}&to=${farPastTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const data = res.json().data;
+
+    expect(data.totalCases).toBe(0);
+    expect(data.aiResolved).toBe(0);
+    expect(data.humanEscalated).toBe(0);
+    expect(data.resolved).toBe(0);
+    expect(data.open).toBe(0);
+    expect(data.slaCompliance.rate).toBeNull();
+    expect(data.averageResponseSeconds).toBeNull();
+    expect(data.averageResolutionSeconds).toBeNull();
+  });
+
+  it('rejects a range where from is after to', async () => {
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/management?from=${rangeTo}&to=${rangeFrom}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/platform-reports/product-dashboard.test.ts b/tests/integration/platform-reports/product-dashboard.test.ts
new file mode 100644
index 0000000..6b57ddb
--- /dev/null
+++ b/tests/integration/platform-reports/product-dashboard.test.ts
@@ -0,0 +1,127 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { buildApp } from '@/app';
+import { prismaClient } from '@/infrastructure/database';
+import { FastifyInstance } from 'fastify';
+import { loginAs, authHeader } from '../../helpers/auth';
+import {
+  encryptCredential,
+  generateCredentialSecret,
+  issueIntegrationToken,
+} from '@/modules/catalog/products';
+import { errorCodesService } from '@/modules/ai-support/knowledge';
+
+/** Covers specs/015-reporting-dashboards/quickstart.md Scenario 2 against a real Postgres/Redis. */
+describe('Product dashboard (User Story 2)', () => {
+  let app: FastifyInstance;
+  let authToken: string;
+  const rangeFrom = new Date(Date.now() - 60 * 60 * 1000).toISOString();
+  const rangeTo = new Date(Date.now() + 60 * 60 * 1000).toISOString();
+
+  async function setUpProduct(nameSuffix: string) {
+    const externalProductId = `TEST_PRODUCT_REPORT_${nameSuffix}_${Date.now()}`;
+    const product = await prismaClient.product.create({
+      data: { externalProductId, name: `Product Report ${nameSuffix}`, status: 'active' },
+    });
+    const secret = generateCredentialSecret();
+    await prismaClient.productIntegration.create({
+      data: {
+        productId: product.id,
+        credentialRef: encryptCredential(secret),
+        authMechanism: 'signed_token',
+        allowedScope: { tenantIds: ['tenant-1'] },
+        status: 'active',
+        rateLimitPerMinute: 1000,
+        rateLimitPerUserPerMinute: 1000,
+      },
+    });
+    return { externalProductId, productId: product.id, secret };
+  }
+
+  async function createTicket(externalProductId: string, secret: string): Promise<string> {
+    const token = issueIntegrationToken(secret, {
+      externalProductId,
+      tenantId: 'tenant-1',
+      userId: 'user-1',
+    });
+    const created = await app.inject({
+      method: 'POST',
+      url: '/v1/support/requests',
+      headers: { authorization: `Bearer ${token}` },
+      payload: {
+        productId: externalProductId,
+        tenantId: 'tenant-1',
+        userId: 'user-1',
+        source: 'test',
+        problem: `Product report test ${Date.now()}-${Math.random()}`,
+      },
+    });
+    expect(created.statusCode).toBe(202);
+    return created.json().data.ticketId as string;
+  }
+
+  beforeAll(async () => {
+    app = await buildApp();
+    authToken = await loginAs(app, 'ADMIN');
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  it("scopes every figure to the requested product, never another product's data", async () => {
+    const productA = await setUpProduct('A');
+    const productB = await setUpProduct('B');
+
+    await createTicket(productA.externalProductId, productA.secret);
+    await createTicket(productA.externalProductId, productA.secret);
+    await createTicket(productB.externalProductId, productB.secret);
+
+    const resA = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/product/${productA.externalProductId}?from=${rangeFrom}&to=${rangeTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(resA.statusCode).toBe(200);
+    expect(resA.json().data.supportVolume).toBe(2);
+
+    const resB = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/product/${productB.externalProductId}?from=${rangeFrom}&to=${rangeTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(resB.statusCode).toBe(200);
+    expect(resB.json().data.supportVolume).toBe(1);
+  });
+
+  it('ranks the most-frequently-looked-up error code first', async () => {
+    const product = await setUpProduct('ERR');
+    const popularCode = `POPULAR-${Date.now()}`;
+    const rareCode = `RARE-${Date.now()}`;
+    await errorCodesService.createErrorCode(product.productId, popularCode, 'Popular error');
+    await errorCodesService.createErrorCode(product.productId, rareCode, 'Rare error');
+
+    await errorCodesService.findKnownIssuesByErrorCode(product.productId, popularCode);
+    await errorCodesService.findKnownIssuesByErrorCode(product.productId, popularCode);
+    await errorCodesService.findKnownIssuesByErrorCode(product.productId, popularCode);
+    await errorCodesService.findKnownIssuesByErrorCode(product.productId, rareCode);
+
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/product/${product.externalProductId}?from=${rangeFrom}&to=${rangeTo}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const topErrors = res.json().data.topErrors as Array<{ code: string; count: number }>;
+    expect(topErrors[0]).toMatchObject({ code: popularCode, count: 3 });
+    expect(topErrors.find((e) => e.code === rareCode)).toMatchObject({ count: 1 });
+  });
+
+  it('404s for an unknown product', async () => {
+    const res = await app.inject({
+      method: 'GET',
+      url: `/admin/reports/product/NONEXISTENT_PRODUCT_${Date.now()}`,
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(404);
+  });
+});
diff --git a/tests/integration/platform-reports/support-dashboard.test.ts b/tests/integration/platform-reports/support-dashboard.test.ts
new file mode 100644
index 0000000..95ba63c
--- /dev/null
+++ b/tests/integration/platform-reports/support-dashboard.test.ts
@@ -0,0 +1,155 @@
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import { buildApp } from '@/app';
+import { prismaClient } from '@/infrastructure/database';
+import { FastifyInstance } from 'fastify';
+import { loginAs, authHeader } from '../../helpers/auth';
+import {
+  encryptCredential,
+  generateCredentialSecret,
+  issueIntegrationToken,
+} from '@/modules/catalog/products';
+import { reportingConfig } from '@/config';
+
+/**
+ * Covers specs/015-reporting-dashboards/quickstart.md Scenario 3 against a real Postgres/Redis.
+ * Assignment rows are created directly via Prisma (not through a real HUMAN_ESCALATION +
+ * default-strategy auto-assignment) — the same contamination avoidance
+ * management-dashboard.test.ts already documents: this test only needs the persisted
+ * Assignment/SLARun state its own aggregation queries read, not a live orchestration run.
+ */
+describe('Support dashboard (User Story 3)', () => {
+  let app: FastifyInstance;
+  let authToken: string;
+  const externalProductId = `TEST_SUPPORT_REPORT_PROD_${Date.now()}`;
+  let productId: string;
+  let secret: string;
+
+  beforeAll(async () => {
+    app = await buildApp();
+    authToken = await loginAs(app, 'ADMIN');
+
+    const product = await prismaClient.product.create({
+      data: { externalProductId, name: 'Support Report Test Product', status: 'active' },
+    });
+    productId = product.id;
+    secret = generateCredentialSecret();
+    await prismaClient.productIntegration.create({
+      data: {
+        productId,
+        credentialRef: encryptCredential(secret),
+        authMechanism: 'signed_token',
+        allowedScope: { tenantIds: ['tenant-1'] },
+        status: 'active',
+        rateLimitPerMinute: 1000,
+        rateLimitPerUserPerMinute: 1000,
+      },
+    });
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  async function createTicket(): Promise<string> {
+    const token = issueIntegrationToken(secret, {
+      externalProductId,
+      tenantId: 'tenant-1',
+      userId: 'user-1',
+    });
+    const created = await app.inject({
+      method: 'POST',
+      url: '/v1/support/requests',
+      headers: { authorization: `Bearer ${token}` },
+      payload: {
+        productId: externalProductId,
+        tenantId: 'tenant-1',
+        userId: 'user-1',
+        source: 'test',
+        problem: `Support report test ${Date.now()}-${Math.random()}`,
+      },
+    });
+    expect(created.statusCode).toBe(202);
+    return created.json().data.ticketId as string;
+  }
+
+  it("reflects each agent's real current assignment workload", async () => {
+    const team = await app.inject({
+      method: 'POST',
+      url: '/admin/teams',
+      headers: authHeader(authToken),
+      payload: { name: `Support Report Team ${Date.now()}` },
+    });
+    const teamId = team.json().data.id as string;
+    const agent = await app.inject({
+      method: 'POST',
+      url: `/admin/teams/${teamId}/agents`,
+      headers: authHeader(authToken),
+      payload: { name: 'Support Report Agent' },
+    });
+    const agentId = agent.json().data.id as string;
+
+    const ticket1 = await createTicket();
+    const ticket2 = await createTicket();
+    await prismaClient.assignment.createMany({
+      data: [
+        { ticketId: ticket1, agentId, strategy: 'MANUAL', isCurrent: true },
+        { ticketId: ticket2, agentId, strategy: 'MANUAL', isCurrent: true },
+      ],
+    });
+
+    const res = await app.inject({
+      method: 'GET',
+      url: '/admin/reports/support',
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    const workload = res.json().data.workloadByAgent as Array<{
+      agentId: string;
+      openAssignments: number;
+    }>;
+    expect(workload.find((w) => w.agentId === agentId)).toMatchObject({ openAssignments: 2 });
+  });
+
+  it('counts a near-due SLA run as at-risk, distinct from breached', async () => {
+    const policy = await prismaClient.sLAPolicy.create({
+      data: {
+        name: `Support Risk Policy ${Date.now()}`,
+        productId,
+        firstResponseMinutes: 30,
+        resolutionMinutes: 240,
+      },
+    });
+
+    const riskTicketId = await createTicket();
+    await prismaClient.sLARun.create({
+      data: {
+        ticketId: riskTicketId,
+        policyId: policy.id,
+        firstResponseDueAt: new Date(Date.now() + 30 * 60_000),
+        resolutionDueAt: new Date(
+          Date.now() + (reportingConfig.slaRiskThresholdMinutes - 1) * 60_000,
+        ),
+        status: 'running',
+      },
+    });
+
+    const safeTicketId = await createTicket();
+    await prismaClient.sLARun.create({
+      data: {
+        ticketId: safeTicketId,
+        policyId: policy.id,
+        firstResponseDueAt: new Date(Date.now() + 30 * 60_000),
+        resolutionDueAt: new Date(Date.now() + 999 * 60_000),
+        status: 'running',
+      },
+    });
+
+    const res = await app.inject({
+      method: 'GET',
+      url: '/admin/reports/support',
+      headers: authHeader(authToken),
+    });
+    expect(res.statusCode).toBe(200);
+    expect(res.json().data.slaAtRisk).toBeGreaterThanOrEqual(1);
+  });
+});
diff --git a/tests/unit/platform/reports/confidence-distribution.test.ts b/tests/unit/platform/reports/confidence-distribution.test.ts
new file mode 100644
index 0000000..f060ab0
--- /dev/null
+++ b/tests/unit/platform/reports/confidence-distribution.test.ts
@@ -0,0 +1,29 @@
+import { describe, it, expect } from 'vitest';
+import { decideConfidenceBand } from '@/modules/ai-support/sessions';
+import { aiConfig } from '@/config';
+
+/**
+ * 015-reporting-dashboards research.md §7: the AI dashboard's confidence distribution reuses
+ * 005-ai-support's own decideConfidenceBand against the system-default thresholds, rather than
+ * reimplementing a threshold check — this test proves the reused function classifies values
+ * the way the dashboard's own bucketing loop (reports.service.ts) depends on.
+ */
+describe('AI dashboard confidence distribution reuses decideConfidenceBand', () => {
+  const policy = {
+    highThreshold: aiConfig.defaultHighConfidence,
+    lowThreshold: aiConfig.defaultLowConfidence,
+  };
+
+  it('classifies a high-confidence value as proceed', () => {
+    expect(decideConfidenceBand(policy.highThreshold, policy)).toBe('proceed');
+  });
+
+  it('classifies a low-confidence value as escalate', () => {
+    expect(decideConfidenceBand(policy.lowThreshold - 0.01, policy)).toBe('escalate');
+  });
+
+  it('classifies a mid-range value as ask', () => {
+    const midpoint = (policy.highThreshold + policy.lowThreshold) / 2;
+    expect(decideConfidenceBand(midpoint, policy)).toBe('ask');
+  });
+});
diff --git a/tests/unit/platform/reports/rate-helpers.test.ts b/tests/unit/platform/reports/rate-helpers.test.ts
new file mode 100644
index 0000000..53fbcdb
--- /dev/null
+++ b/tests/unit/platform/reports/rate-helpers.test.ts
@@ -0,0 +1,27 @@
+import { describe, it, expect } from 'vitest';
+import { computeRate, computeAverageSeconds } from '@/modules/platform/reports/mapper';
+
+describe('computeRate (015-reporting-dashboards research.md §3)', () => {
+  it('returns null when the denominator is zero — never NaN, never a computed 0', () => {
+    expect(computeRate(0, 0)).toBeNull();
+    expect(computeRate(5, 0)).toBeNull();
+  });
+
+  it('computes a real rate when there is qualifying data', () => {
+    expect(computeRate(3, 12)).toBe(0.25);
+  });
+
+  it('returns a real 0 when the numerator is legitimately zero but the denominator is not', () => {
+    expect(computeRate(0, 10)).toBe(0);
+  });
+});
+
+describe('computeAverageSeconds', () => {
+  it('returns null for an empty list — no fabricated average', () => {
+    expect(computeAverageSeconds([])).toBeNull();
+  });
+
+  it('averages a list of millisecond durations into seconds', () => {
+    expect(computeAverageSeconds([1000, 2000, 3000])).toBe(2);
+  });
+});