diff --git a/packages/api/src/router/audit-log-procedure-support.ts b/packages/api/src/router/audit-log-procedure-support.ts
new file mode 100644
index 0000000..b935618
--- /dev/null
+++ b/packages/api/src/router/audit-log-procedure-support.ts
@@ -0,0 +1,127 @@
+import { z } from "zod";
+import type { TRPCContext } from "../trpc.js";
+import {
+  auditLogByEntityInputSchema,
+  auditLogListInputSchema,
+  auditLogTimelineInputSchema,
+} from "./audit-log-inputs.js";
+import {
+  formatAuditDetailEntry,
+  formatAuditListEntry,
+  getAuditActivitySummary,
+  getAuditEntriesByEntity,
+  getAuditEntryById,
+  getAuditTimeline,
+  listAuditEntries,
+  toAuditListInput,
+  toAuditTimelineInput,
+} from "./audit-log-support.js";
+
+export { auditLogByEntityInputSchema, auditLogListInputSchema, auditLogTimelineInputSchema };
+
+export const auditLogEntryByIdInputSchema = z.object({
+  id: z.string(),
+});
+
+export const auditLogActivitySummaryInputSchema = z.object({
+  startDate: z.date().optional(),
+  endDate: z.date().optional(),
+});
+
+type AuditLogContext = Pick<TRPCContext, "db">;
+
+export async function listAuditLogEntries(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogListInputSchema>,
+) {
+  return listAuditEntries(ctx.db, toAuditListInput({
+    entityType: input.entityType,
+    entityId: input.entityId,
+    userId: input.userId,
+    action: input.action,
+    source: input.source,
+    startDate: input.startDate,
+    endDate: input.endDate,
+    search: input.search,
+    limit: input.limit,
+    cursor: input.cursor,
+  }));
+}
+
+export async function listAuditLogEntriesDetail(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogListInputSchema>,
+) {
+  const result = await listAuditLogEntries(ctx, input);
+  return {
+    items: result.items.map(formatAuditListEntry),
+    nextCursor: result.nextCursor ?? null,
+  };
+}
+
+export async function getAuditLogEntryById(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogEntryByIdInputSchema>,
+) {
+  return getAuditEntryById(ctx.db, input.id);
+}
+
+export async function getAuditLogEntryByIdDetail(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogEntryByIdInputSchema>,
+) {
+  const entry = await getAuditEntryById(ctx.db, input.id);
+  return formatAuditDetailEntry(entry);
+}
+
+export async function getAuditLogEntriesByEntity(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogByEntityInputSchema>,
+) {
+  return getAuditEntriesByEntity(ctx.db, input);
+}
+
+export async function getAuditLogEntriesByEntityDetail(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogByEntityInputSchema>,
+) {
+  const entries = await getAuditEntriesByEntity(ctx.db, input);
+  return {
+    entityType: input.entityType,
+    entityId: input.entityId,
+    entityName: entries[0]?.entityName ?? null,
+    itemCount: entries.length,
+    items: entries.map(formatAuditDetailEntry),
+  };
+}
+
+export async function getAuditLogTimeline(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogTimelineInputSchema>,
+) {
+  return getAuditTimeline(ctx.db, toAuditTimelineInput({
+    startDate: input.startDate,
+    endDate: input.endDate,
+    limit: input.limit,
+  }));
+}
+
+export async function getAuditLogTimelineDetail(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogTimelineInputSchema>,
+) {
+  const timeline = await getAuditLogTimeline(ctx, input);
+  return Object.fromEntries(
+    Object.entries(timeline).map(([dateKey, entries]) => [
+      dateKey,
+      entries.map(formatAuditDetailEntry),
+    ]),
+  );
+}
+
+export async function getAuditLogActivitySummary(
+  ctx: AuditLogContext,
+  input: z.infer<typeof auditLogActivitySummaryInputSchema>,
+) {
+  return getAuditActivitySummary(ctx.db, input);
+}
diff --git a/packages/api/src/router/audit-log.ts b/packages/api/src/router/audit-log.ts
index 4810064..d440808 100644
--- a/packages/api/src/router/audit-log.ts
+++ b/packages/api/src/router/audit-log.ts
@@ -1,145 +1,55 @@
-import { z } from "zod";
 import { createTRPCRouter, controllerProcedure } from "../trpc.js";
 import {
+  auditLogActivitySummaryInputSchema,
   auditLogByEntityInputSchema,
+  auditLogEntryByIdInputSchema,
   auditLogListInputSchema,
   auditLogTimelineInputSchema,
-} from "./audit-log-inputs.js";
-import {
-  formatAuditDetailEntry,
-  formatAuditListEntry,
-  getAuditActivitySummary,
-  getAuditEntriesByEntity,
-  getAuditEntryById,
-  getAuditTimeline,
-  listAuditEntries,
-  toAuditListInput,
-  toAuditTimelineInput,
-} from "./audit-log-support.js";
-
-// ─── Router ───────────────────────────────────────────────────────────────────
+  getAuditLogActivitySummary,
+  getAuditLogEntriesByEntity,
+  getAuditLogEntriesByEntityDetail,
+  getAuditLogEntryById,
+  getAuditLogEntryByIdDetail,
+  getAuditLogTimeline,
+  getAuditLogTimelineDetail,
+  listAuditLogEntries,
+  listAuditLogEntriesDetail,
+} from "./audit-log-procedure-support.js";
 
 export const auditLogRouter = createTRPCRouter({
-  /**
-   * Paginated, filterable list of audit log entries.
-   * Cursor-based pagination using createdAt + id.
-   */
   list: controllerProcedure
     .input(auditLogListInputSchema)
-    .query(async ({ ctx, input }) => {
-      return listAuditEntries(ctx.db, toAuditListInput({
-        entityType: input.entityType,
-        entityId: input.entityId,
-        userId: input.userId,
-        action: input.action,
-        source: input.source,
-        startDate: input.startDate,
-        endDate: input.endDate,
-        search: input.search,
-        limit: input.limit,
-        cursor: input.cursor,
-      }));
-    }),
+    .query(({ ctx, input }) => listAuditLogEntries(ctx, input)),
 
   listDetail: controllerProcedure
     .input(auditLogListInputSchema)
-    .query(async ({ ctx, input }) => {
-      const result = await listAuditEntries(ctx.db, toAuditListInput({
-        entityType: input.entityType,
-        entityId: input.entityId,
-        userId: input.userId,
-        action: input.action,
-        source: input.source,
-        startDate: input.startDate,
-        endDate: input.endDate,
-        search: input.search,
-        limit: input.limit,
-        cursor: input.cursor,
-      }));
-      return {
-        items: result.items.map(formatAuditListEntry),
-        nextCursor: result.nextCursor ?? null,
-      };
-    }),
+    .query(({ ctx, input }) => listAuditLogEntriesDetail(ctx, input)),
 
-  /**
-   * Get a single audit entry with full changes JSONB (for expand/detail view).
-   */
   getById: controllerProcedure
-    .input(z.object({ id: z.string() }))
-    .query(async ({ ctx, input }) => {
-      return getAuditEntryById(ctx.db, input.id);
-    }),
+    .input(auditLogEntryByIdInputSchema)
+    .query(({ ctx, input }) => getAuditLogEntryById(ctx, input)),
 
   getByIdDetail: controllerProcedure
-    .input(z.object({ id: z.string() }))
-    .query(async ({ ctx, input }) => {
-      const entry = await getAuditEntryById(ctx.db, input.id);
-      return formatAuditDetailEntry(entry);
-    }),
+    .input(auditLogEntryByIdInputSchema)
+    .query(({ ctx, input }) => getAuditLogEntryByIdDetail(ctx, input)),
 
-  /**
-   * Get all audit entries for a specific entity (e.g. a project or resource).
-   */
   getByEntity: controllerProcedure
     .input(auditLogByEntityInputSchema)
-    .query(async ({ ctx, input }) => {
-      return getAuditEntriesByEntity(ctx.db, input);
-    }),
+    .query(({ ctx, input }) => getAuditLogEntriesByEntity(ctx, input)),
 
   getByEntityDetail: controllerProcedure
     .input(auditLogByEntityInputSchema)
-    .query(async ({ ctx, input }) => {
-      const entries = await getAuditEntriesByEntity(ctx.db, input);
-      return {
-        entityType: input.entityType,
-        entityId: input.entityId,
-        entityName: entries[0]?.entityName ?? null,
-        itemCount: entries.length,
-        items: entries.map(formatAuditDetailEntry),
-      };
-    }),
+    .query(({ ctx, input }) => getAuditLogEntriesByEntityDetail(ctx, input)),
 
-  /**
-   * Timeline view: entries grouped by date (YYYY-MM-DD).
-   */
   getTimeline: controllerProcedure
     .input(auditLogTimelineInputSchema)
-    .query(async ({ ctx, input }) => {
-      return getAuditTimeline(ctx.db, toAuditTimelineInput({
-        startDate: input.startDate,
-        endDate: input.endDate,
-        limit: input.limit,
-      }));
-    }),
+    .query(({ ctx, input }) => getAuditLogTimeline(ctx, input)),
 
   getTimelineDetail: controllerProcedure
     .input(auditLogTimelineInputSchema)
-    .query(async ({ ctx, input }) => {
-      const timeline = await getAuditTimeline(ctx.db, toAuditTimelineInput({
-        startDate: input.startDate,
-        endDate: input.endDate,
-        limit: input.limit,
-      }));
-      return Object.fromEntries(
-        Object.entries(timeline).map(([dateKey, entries]) => [
-          dateKey,
-          entries.map(formatAuditDetailEntry),
-        ]),
-      );
-    }),
+    .query(({ ctx, input }) => getAuditLogTimelineDetail(ctx, input)),
 
-  /**
-   * Activity summary: counts by entity type, action, and user for a date range.
-   */
   getActivitySummary: controllerProcedure
-    .input(
-      z.object({
-        startDate: z.date().optional(),
-        endDate: z.date().optional(),
-      }),
-    )
-    .query(async ({ ctx, input }) => {
-      return getAuditActivitySummary(ctx.db, input);
-    }),
+    .input(auditLogActivitySummaryInputSchema)
+    .query(({ ctx, input }) => getAuditLogActivitySummary(ctx, input)),
 });