printedparts stage 9: reports - stock w/ reconcile, consumption, by-person

Three jwt-optional endpoints with ?format=csv, merged into the reports
hub via get_reports while the plugin is enabled. The stock report's
ledgerdelta column is the reconcile check: 0 for every item whose
stock moved through the ledger, nonzero for anything that bypassed it
(the hand-seeded dev rows demonstrate the catch). MySQL SUM returns
Decimal - cast to int or the delta serializes as a string.

frontend/src/api/index.js

@@ -1159,5 +1159,11 @@ export const printedpartsApi = {
   },
   adjust(printeditemid, data) {
     return api.post(`/printedparts/items/${printeditemid}/adjust`, data)
+  },
+  kioskItem(itemcode) {
+    return api.get(`/printedparts/kiosk/item/${encodeURIComponent(itemcode)}`)
+  },
+  kioskTake(data) {
+    return api.post('/printedparts/kiosk/take', data)
   }
 }

frontend/src/components/TouchKeypad.vue

@@ -0,0 +1,38 @@
+<template>
+  <div class="touch-keypad">
+    <button v-for="digit in digits" :key="digit" type="button"
+            class="keypad-button" @click="$emit('digit', digit)">
+      {{ digit }}
+    </button>
+    <button type="button" class="keypad-button keypad-muted"
+            @click="$emit('clear')">C</button>
+    <button type="button" class="keypad-button" @click="$emit('digit', '0')">0</button>
+    <button type="button" class="keypad-button keypad-muted"
+            @click="$emit('backspace')">&lt;</button>
+  </div>
+</template>
+
+<script setup>
+const digits = ['1', '2', '3', '4', '5', '6', '7', '8', '9']
+defineEmits(['digit', 'clear', 'backspace'])
+</script>
+
+<style scoped>
+.touch-keypad {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 0.6rem;
+  max-width: 20rem;
+}
+.keypad-button {
+  font-size: 1.8rem;
+  padding: 1rem 0;
+  border-radius: 0.5rem;
+  border: 1px solid var(--border);
+  background: var(--bg-card);
+  color: var(--text);
+  cursor: pointer;
+}
+.keypad-button:active { background: var(--primary); color: #fff; }
+.keypad-muted { color: var(--text-light); }
+</style>

frontend/src/router/index.js

@@ -65,6 +65,14 @@ const routes = [
     name: 'shopfloor',
     component: () => import('../views/ShopfloorDashboard.vue')
   },
+  {
+    // Touch kiosk for taking 3D-printed parts: scan bin, scan badge, keypad.
+    // Open on purpose - see the decision record in the printedparts proposal.
+    path: '/parts-kiosk',
+    name: 'parts-kiosk',
+    component: () => import('../views/printedparts/PartsKiosk.vue'),
+    meta: { plugin: 'printedparts' }
+  },
   {
     path: '/tv',
     name: 'tv',
@@ -109,6 +117,12 @@ const routes = [
     component: () => import('../views/print/USBLabelBatch.vue'),
     meta: { plugin: 'usb' }
   },
+  {
+    path: '/print/printedparts-labels',
+    name: 'print-printedparts-labels',
+    component: () => import('../views/print/PrintedPartsLabels.vue'),
+    meta: { plugin: 'printedparts' }
+  },
   {
     path: '/',
     component: AppLayout,

frontend/src/views/print/PrintedPartsLabels.vue

@@ -0,0 +1,207 @@
+<template>
+  <div>
+    <div class="no-print">
+      <div class="controls">
+        <h3>Print 3D Parts Bin Labels (1in x 0.5in)</h3>
+        <p>
+          Each label is one page on 1in x 0.5in roll stock: CODE128 barcode of
+          the item code, scannable at the parts kiosk.
+        </p>
+
+        <div v-if="loading" class="loading-msg">Loading parts...</div>
+        <div v-else-if="items.length === 0" class="loading-msg">No parts found</div>
+        <div v-else class="parts-grid">
+          <div
+            v-for="item in items"
+            :key="item.printeditemid"
+            class="part-item"
+            :class="{ selected: isSelected(item) }"
+            @click="toggleItem(item)"
+          >
+            <input type="checkbox" :checked="isSelected(item)" @click.stop />
+            <label>
+              <strong><code>{{ item.itemcode }}</code></strong>
+              <div class="alias">{{ item.itemname }}</div>
+            </label>
+          </div>
+        </div>
+
+        <div class="selected-count">
+          Selected: <span class="count">{{ selectedItems.length }}</span> labels
+          <label class="copies-label">Copies each:
+            <input v-model.number="copies" type="number" min="1" max="10" />
+          </label>
+        </div>
+
+        <button class="print-btn" :disabled="selectedItems.length === 0"
+                @click="print">Print Labels</button>
+        <button class="clear-btn" @click="selectedItems = []">Clear All</button>
+        <button class="select-all-btn" @click="selectedItems = [...items]">Select All</button>
+      </div>
+    </div>
+
+    <div class="labels-container">
+      <div v-for="(label, index) in printLabels" :key="index" class="bin-label">
+        <svg :ref="element => setBarcodeElement(element, index)" class="bin-barcode"></svg>
+        <div class="bin-code">{{ label.itemcode }}</div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, onMounted, watch, nextTick } from 'vue'
+import JsBarcode from 'jsbarcode'
+import { printedpartsApi } from '../../api'
+
+const items = ref([])
+const selectedItems = ref([])
+const copies = ref(1)
+const loading = ref(true)
+const barcodeElements = ref({})
+
+onMounted(async () => {
+  try {
+    const response = await printedpartsApi.list({ perpage: 500 })
+    items.value = response.data.data || []
+    // ?item=<id> preselects one part (the Detail-page print button)
+    const preselect = new URLSearchParams(window.location.search).get('item')
+    if (preselect) {
+      const match = items.value.find(
+        candidate => String(candidate.printeditemid) === preselect)
+      if (match) selectedItems.value = [match]
+    }
+  } catch (error) {
+    console.error('Error loading parts:', error)
+  } finally {
+    loading.value = false
+  }
+})
+
+const printLabels = computed(() => {
+  const labels = []
+  for (const item of selectedItems.value) {
+    for (let copy = 0; copy < Math.max(1, copies.value); copy++) {
+      labels.push(item)
+    }
+  }
+  return labels
+})
+
+function isSelected(item) {
+  return selectedItems.value.some(
+    candidate => candidate.printeditemid === item.printeditemid)
+}
+
+function toggleItem(item) {
+  if (isSelected(item)) {
+    selectedItems.value = selectedItems.value.filter(
+      candidate => candidate.printeditemid !== item.printeditemid)
+  } else {
+    selectedItems.value = [...selectedItems.value, item]
+  }
+}
+
+function setBarcodeElement(element, index) {
+  if (element) barcodeElements.value[index] = element
+}
+
+watch(printLabels, async labels => {
+  await nextTick()
+  labels.forEach((label, index) => {
+    const element = barcodeElements.value[index]
+    if (element) {
+      // CODE128 of the short item code fits 1x0.5in with comfortable
+      // scanner tolerance; a QR at this size would be marginal.
+      JsBarcode(element, label.itemcode, {
+        format: 'CODE128',
+        displayValue: false,
+        width: 1.4,
+        height: 26,
+        margin: 0
+      })
+    }
+  })
+}, { deep: true })
+
+function print() {
+  window.print()
+}
+</script>
+
+<style scoped>
+.controls {
+  max-width: 46rem;
+  margin: 1rem auto;
+  padding: 1rem;
+  background: var(--bg-card);
+  border: 1px solid var(--border);
+  border-radius: 0.5rem;
+}
+.parts-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
+  gap: 0.5rem;
+  max-height: 20rem;
+  overflow-y: auto;
+  margin: 1rem 0;
+}
+.part-item {
+  display: flex;
+  gap: 0.5rem;
+  padding: 0.5rem;
+  border: 1px solid var(--border);
+  border-radius: 0.35rem;
+  cursor: pointer;
+}
+.part-item.selected { border-color: var(--primary); }
+.alias { color: var(--text-light); font-size: 0.85rem; }
+.selected-count { margin: 0.75rem 0; }
+.copies-label { margin-left: 1.25rem; }
+.copies-label input { width: 4rem; padding: 0.25rem; }
+.print-btn, .clear-btn, .select-all-btn {
+  margin-right: 0.5rem;
+  padding: 0.5rem 1rem;
+  cursor: pointer;
+}
+.loading-msg { color: var(--text-light); padding: 1rem; }
+
+/* screen preview of the labels */
+.labels-container { display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 1rem; }
+.bin-label {
+  width: 1in;
+  height: 0.5in;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  overflow: hidden;
+  background: #fff;
+  outline: 1px dashed #bbb;
+}
+.bin-barcode { width: 0.92in; height: 0.3in; }
+.bin-code {
+  font-size: 6.5pt;
+  font-family: monospace;
+  color: #000;
+  line-height: 1;
+}
+
+/* 1in x 0.5in roll stock: one label per page */
+@media print {
+  .no-print { display: none; }
+  .labels-container { display: block; padding: 0; gap: 0; }
+  .bin-label {
+    outline: none;
+    page-break-after: always;
+    break-after: page;
+  }
+}
+</style>
+
+<style>
+@media print {
+  @page { size: 1in 0.5in; margin: 0; }
+  body { margin: 0; }
+}
+</style>

frontend/src/views/printedparts/PartsKiosk.vue

@@ -0,0 +1,242 @@
+<template>
+  <div class="parts-kiosk" @click="focusWedge">
+    <!-- keyboard-wedge scanners type the code + Enter into this hidden,
+         always-focused input; whichever step is active consumes the scan -->
+    <input ref="wedgeInput" v-model="wedgeBuffer" class="wedge-input"
+           autocomplete="off" @keydown.enter.prevent="onWedgeEnter" />
+
+    <header class="kiosk-header">
+      <h1>3D Printed Parts</h1>
+      <button v-if="step !== 'item'" class="btn btn-secondary" @click="reset">
+        Start over
+      </button>
+    </header>
+
+    <div v-if="error" class="kiosk-error">{{ error }}</div>
+
+    <!-- step 1: scan the bin -->
+    <section v-if="step === 'item'" class="kiosk-step">
+      <p class="kiosk-prompt">Scan the barcode on the bin</p>
+      <p class="kiosk-hint">
+        No scanner?
+        <a href="#" @click.prevent="manualEntry = !manualEntry">Type the code</a>
+      </p>
+      <div v-if="manualEntry" class="manual-row">
+        <input v-model="manualCode" class="form-control" placeholder="3DP-0001"
+               @keydown.enter="lookupItem(manualCode)" />
+        <button class="btn btn-primary" @click="lookupItem(manualCode)">Go</button>
+      </div>
+    </section>
+
+    <!-- step 2: badge -->
+    <section v-else-if="step === 'badge'" class="kiosk-step">
+      <div class="item-card">
+        <img v-if="item.imageurl" :src="withBase(item.imageurl)" class="item-photo" />
+        <div>
+          <h2>{{ item.itemname }}</h2>
+          <p class="kiosk-hint">{{ item.itemcode }} - {{ item.quantityonhand }} on hand</p>
+        </div>
+      </div>
+      <p class="kiosk-prompt">Scan your badge</p>
+      <div class="manual-row">
+        <input v-model="manualBadge" class="form-control" placeholder="or type your SSO"
+               @keydown.enter="acceptBadge(manualBadge)" />
+        <button class="btn btn-primary" @click="acceptBadge(manualBadge)">Next</button>
+      </div>
+    </section>
+
+    <!-- step 3: quantity -->
+    <section v-else-if="step === 'quantity'" class="kiosk-step">
+      <div class="item-card">
+        <img v-if="item.imageurl" :src="withBase(item.imageurl)" class="item-photo" />
+        <div>
+          <h2>{{ item.itemname }}</h2>
+          <p class="kiosk-hint">{{ item.quantityonhand }} on hand</p>
+        </div>
+      </div>
+      <p class="kiosk-prompt">How many are you taking?</p>
+      <div class="quantity-display">{{ quantity || '0' }}</div>
+      <TouchKeypad @digit="quantity += $event"
+                   @clear="quantity = ''"
+                   @backspace="quantity = quantity.slice(0, -1)" />
+      <button class="btn btn-primary take-button" :disabled="!quantity || submitting"
+              @click="submitTake">
+        {{ submitting ? 'Working...' : 'TAKE' }}
+      </button>
+    </section>
+
+    <!-- done -->
+    <section v-else-if="step === 'done'" class="kiosk-step">
+      <p class="kiosk-success">Done - {{ doneMessage }}</p>
+      <p class="kiosk-hint">Starting over in a few seconds...</p>
+    </section>
+  </div>
+</template>
+
+<script setup>
+import { ref, onMounted, onBeforeUnmount } from 'vue'
+import { printedpartsApi } from '../../api'
+import { withBase } from '../../utils/basePath'
+import TouchKeypad from '../../components/TouchKeypad.vue'
+
+const step = ref('item')
+const item = ref(null)
+const badge = ref('')
+const quantity = ref('')
+const error = ref('')
+const doneMessage = ref('')
+const submitting = ref(false)
+const manualEntry = ref(false)
+const manualCode = ref('')
+const manualBadge = ref('')
+const wedgeInput = ref(null)
+const wedgeBuffer = ref('')
+let resetTimer = null
+
+onMounted(focusWedge)
+onBeforeUnmount(() => clearTimeout(resetTimer))
+
+function focusWedge() {
+  wedgeInput.value?.focus()
+}
+
+function onWedgeEnter() {
+  const scanned = wedgeBuffer.value.trim()
+  wedgeBuffer.value = ''
+  if (!scanned) return
+  if (step.value === 'item') lookupItem(scanned)
+  else if (step.value === 'badge') acceptBadge(scanned)
+}
+
+async function lookupItem(itemcode) {
+  error.value = ''
+  if (!itemcode) return
+  try {
+    const response = await printedpartsApi.kioskItem(itemcode.trim())
+    item.value = response.data.data
+    step.value = 'badge'
+    manualEntry.value = false
+    manualCode.value = ''
+  } catch (lookupError) {
+    error.value = lookupError.response?.data?.data?.error?.message ||
+      'No part matches that barcode'
+  }
+  focusWedge()
+}
+
+function acceptBadge(value) {
+  error.value = ''
+  const scanned = (value || '').trim()
+  if (!scanned) return
+  badge.value = scanned
+  manualBadge.value = ''
+  step.value = 'quantity'
+  focusWedge()
+}
+
+async function submitTake() {
+  submitting.value = true
+  error.value = ''
+  try {
+    const response = await printedpartsApi.kioskTake({
+      itemcode: item.value.itemcode,
+      badge: badge.value,
+      quantity: parseInt(quantity.value, 10)
+    })
+    doneMessage.value = response.data.message
+    step.value = 'done'
+    resetTimer = setTimeout(reset, 4000)
+  } catch (takeError) {
+    error.value = takeError.response?.data?.data?.error?.message ||
+      'Could not complete - see the parts team'
+    if (takeError.response?.status === 422) {
+      // badge problem: go back a step so the next scan retries cleanly
+      step.value = 'badge'
+    }
+  } finally {
+    submitting.value = false
+  }
+}
+
+function reset() {
+  clearTimeout(resetTimer)
+  step.value = 'item'
+  item.value = null
+  badge.value = ''
+  quantity.value = ''
+  error.value = ''
+  doneMessage.value = ''
+  focusWedge()
+}
+</script>
+
+<style scoped>
+.parts-kiosk {
+  min-height: 100vh;
+  background: var(--bg);
+  color: var(--text);
+  padding: 2rem;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 1.5rem;
+}
+.kiosk-header {
+  width: 100%;
+  max-width: 40rem;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+.wedge-input {
+  position: absolute;
+  opacity: 0;
+  height: 1px;
+  width: 1px;
+}
+.kiosk-step {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 1.25rem;
+  max-width: 40rem;
+  width: 100%;
+}
+.kiosk-prompt { font-size: 1.6rem; font-weight: 600; }
+.kiosk-hint { color: var(--text-light); }
+.kiosk-error {
+  background: var(--danger);
+  color: #fff;
+  padding: 0.75rem 1.25rem;
+  border-radius: 0.5rem;
+}
+.kiosk-success { font-size: 1.6rem; color: var(--success); font-weight: 600; }
+.item-card {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+  background: var(--bg-card);
+  border: 1px solid var(--border);
+  border-radius: 0.6rem;
+  padding: 1rem 1.5rem;
+  width: 100%;
+}
+.item-photo {
+  width: 5rem;
+  height: 5rem;
+  object-fit: cover;
+  border-radius: 0.4rem;
+}
+.quantity-display {
+  font-size: 3rem;
+  font-weight: 700;
+  min-width: 8rem;
+  text-align: center;
+  border-bottom: 3px solid var(--primary);
+}
+.take-button {
+  font-size: 1.5rem;
+  padding: 0.9rem 3.5rem;
+}
+.manual-row { display: flex; gap: 0.6rem; }
+</style>

frontend/src/views/printedparts/PrintedItemDetail.vue

@@ -27,6 +27,8 @@
             </button>
             <router-link :to="`/printedparts/${item.printeditemid}/edit`"
                          class="btn btn-secondary btn-sm">Edit</router-link>
+            <router-link :to="`/print/printedparts-labels?item=${item.printeditemid}`"
+                         class="btn btn-secondary btn-sm">Bin Label</router-link>
           </div>
         </div>
       </div>

frontend/src/views/printedparts/PrintedItemsList.vue

@@ -2,7 +2,12 @@
   <div>
     <div class="page-header">
       <h2>3D Printed Parts</h2>
-      <router-link to="/printedparts/new" class="btn btn-primary">Add Part</router-link>
+      <div class="header-actions">
+        <router-link to="/print/printedparts-labels" class="btn btn-secondary">
+          Print Labels
+        </router-link>
+        <router-link to="/printedparts/new" class="btn btn-primary">Add Part</router-link>
+      </div>
     </div>
 
     <div class="filters">
@@ -131,6 +136,7 @@ function debouncedSearch() {
   text-overflow: ellipsis;
   white-space: nowrap;
 }
+.header-actions { display: flex; gap: 0.5rem; }
 .lowstock-filter {
   display: inline-flex;
   align-items: center;

plugins/printedparts/README.md

@@ -41,3 +41,19 @@ pytest plugins/printedparts/tests/
 - `docs/PLUGIN-QUICKSTART.md` - 30-minute walkthrough
 - `migrations/adr/ADR-001-asset-as-platform-contract.md` - the platform contract
 - `migrations/adr/ADR-002-plugin-versioning.md` - versioning rules
+
+## Why the kiosk take endpoint is unauthenticated
+
+`POST /api/printedparts/kiosk/take` is the product's first open WRITE (every
+other kiosk endpoint is a read). Accepted deliberately, against the criteria
+in docs/proposals/printedparts-plugin.md:
+
+1. Decrement-only: it can reduce stock of an active item, nothing else.
+2. Fully attributed: it refuses to act without a badge that resolves under
+   the site policy; every action lands in the ledger with SSO + name + time.
+3. Bounded blast radius: worst case is stock counts driven low - visible in
+   the ledger and reversible with an adjust.
+4. Physically rate-limited: it serves a touch screen on the shop floor;
+   nothing enumerable, nothing worth scraping.
+
+Any future open-write endpoint must clear the same bar.

plugins/printedparts/api/routes.py

@@ -295,3 +295,164 @@ def adjust_item(item_id: int):
                               http_code=422)
     _ledger_write(item, 'adjust', quantitychange, sso, name, reason=reason)
     return success_response(item.to_dict(), message='Stock adjusted')
+
+
+# --- kiosk: UNauthenticated by decision record --------------------------------
+# The take endpoint is the product's first open WRITE. The proposal's decision
+# record sets the bar it must meet: decrement-only, badge-attributed, bounded,
+# physically rate-limited. It can reduce stock of an active item and nothing
+# else; identity comes from the badge resolved server-side, never the client.
+
+@printedparts_bp.route('/kiosk/item/<itemcode>', methods=['GET'])
+def kiosk_item(itemcode):
+    """Item summary for a scanned bin barcode (open read for the kiosk)."""
+    item = PrintedItem.query.filter(
+        PrintedItem.itemcode == itemcode.strip(),
+        PrintedItem.isactive == True).first()
+    if not item:
+        return error_response(ErrorCodes.NOT_FOUND,
+                              'No part matches that barcode', http_code=404)
+    return success_response(item.to_dict())
+
+
+@printedparts_bp.route('/kiosk/take', methods=['POST'])
+def kiosk_take():
+    """Take parts from a bin. Body: {itemcode, badge, quantity}."""
+    data = request.get_json() or {}
+
+    item = PrintedItem.query.filter(
+        PrintedItem.itemcode == (data.get('itemcode') or '').strip(),
+        PrintedItem.isactive == True).first()
+    if not item:
+        return error_response(ErrorCodes.NOT_FOUND,
+                              'No part matches that barcode', http_code=404)
+
+    quantity = data.get('quantity')
+    if not isinstance(quantity, int) or quantity < 1:
+        return error_response(ErrorCodes.VALIDATION_ERROR,
+                              'Enter how many you are taking')
+    if quantity > item.quantityonhand:
+        return error_response(
+            ErrorCodes.VALIDATION_ERROR,
+            f'Only {item.quantityonhand} on hand - take fewer or see the '
+            f'parts team')
+
+    try:
+        sso, name = resolve_badge(data.get('badge'))
+    except BadgeError as badge_error:
+        return error_response(ErrorCodes.VALIDATION_ERROR, str(badge_error),
+                              http_code=422)
+
+    _ledger_write(item, 'take', -quantity, sso, name)
+    return success_response(item.to_dict(),
+                            message=f'Took {quantity}, {item.quantityonhand} left')
+
+
+# --- reports (merged into GET /api/reports while the plugin is enabled) ------
+
+import csv
+import io
+
+from flask import Response
+from sqlalchemy import func
+
+
+def _csv_response(rows, columns, filename):
+    """CSV download; local helper because generate_csv is not on the
+    contract surface (shopdb.api)."""
+    output = io.StringIO()
+    writer = csv.writer(output)
+    writer.writerow(columns)
+    for row in rows:
+        writer.writerow([row.get(column, '') for column in columns])
+    return Response(
+        output.getvalue(), mimetype='text/csv',
+        headers={'Content-Disposition': f'attachment; filename={filename}'})
+
+
+@printedparts_bp.route('/reports/stock', methods=['GET'])
+@jwt_required(optional=True)
+def report_stock():
+    """Stock levels with low-stock flags and the cache-vs-ledger reconcile.
+
+    ledgerdelta should always be 0; anything else means a write path
+    bypassed the single-commit rule and needs finding.
+    """
+    # int() the sums: MySQL SUM returns Decimal, which JSON-serializes as a
+    # string and breaks the delta arithmetic's type.
+    ledger = {itemid: int(total) for itemid, total in
+              db.session.query(
+                  PrintedItemTransaction.printeditemid,
+                  func.coalesce(func.sum(PrintedItemTransaction.quantitychange), 0))
+              .group_by(PrintedItemTransaction.printeditemid).all()}
+    rows = []
+    for item in PrintedItem.query.filter_by(isactive=True).order_by(
+            PrintedItem.itemname).all():
+        rows.append({
+            'itemcode': item.itemcode,
+            'itemname': item.itemname,
+            'binlocation': item.binlocation or '',
+            'quantityonhand': item.quantityonhand,
+            'lowstockthreshold': item.lowstockthreshold,
+            'islowstock': item.islowstock,
+            'ledgerdelta': item.quantityonhand - ledger.get(item.printeditemid, 0),
+        })
+    columns = ['itemcode', 'itemname', 'binlocation', 'quantityonhand',
+               'lowstockthreshold', 'islowstock', 'ledgerdelta']
+    if request.args.get('format') == 'csv':
+        return _csv_response(rows, columns, 'printedparts-stock.csv')
+    return success_response({'columns': columns, 'rows': rows})
+
+
+@printedparts_bp.route('/reports/consumption', methods=['GET'])
+@jwt_required(optional=True)
+def report_consumption():
+    """Takes per item, optionally bounded by ?days=<n> (default 30)."""
+    days = request.args.get('days', 30, type=int)
+    query = (db.session.query(
+                PrintedItem.itemcode,
+                PrintedItem.itemname,
+                func.count(PrintedItemTransaction.transactionid),
+                func.coalesce(func.sum(-PrintedItemTransaction.quantitychange), 0))
+             .join(PrintedItemTransaction,
+                   PrintedItemTransaction.printeditemid == PrintedItem.printeditemid)
+             .filter(PrintedItemTransaction.transactiontype == 'take'))
+    if days > 0:
+        from datetime import datetime, timedelta, timezone
+        cutoff = datetime.now(timezone.utc).replace(tzinfo=None) - timedelta(days=days)
+        query = query.filter(PrintedItemTransaction.transactiondate >= cutoff)
+    query = query.group_by(PrintedItem.itemcode, PrintedItem.itemname)
+    rows = [{'itemcode': code, 'itemname': name, 'takes': takes,
+             'quantitytaken': int(taken)}
+            for code, name, takes, taken in query.all()]
+    rows.sort(key=lambda row: row['quantitytaken'], reverse=True)
+    columns = ['itemcode', 'itemname', 'takes', 'quantitytaken']
+    if request.args.get('format') == 'csv':
+        return _csv_response(rows, columns, 'printedparts-consumption.csv')
+    return success_response({'columns': columns, 'rows': rows, 'days': days})
+
+
+@printedparts_bp.route('/reports/by-person', methods=['GET'])
+@jwt_required(optional=True)
+def report_by_person():
+    """Takes grouped by employee, optionally bounded by ?days=<n> (default 30)."""
+    days = request.args.get('days', 30, type=int)
+    query = (db.session.query(
+                PrintedItemTransaction.employeesso,
+                func.max(PrintedItemTransaction.employeename),
+                func.count(PrintedItemTransaction.transactionid),
+                func.coalesce(func.sum(-PrintedItemTransaction.quantitychange), 0))
+             .filter(PrintedItemTransaction.transactiontype == 'take'))
+    if days > 0:
+        from datetime import datetime, timedelta, timezone
+        cutoff = datetime.now(timezone.utc).replace(tzinfo=None) - timedelta(days=days)
+        query = query.filter(PrintedItemTransaction.transactiondate >= cutoff)
+    query = query.group_by(PrintedItemTransaction.employeesso)
+    rows = [{'employeesso': sso, 'employeename': name or '', 'takes': takes,
+             'quantitytaken': int(taken)}
+            for sso, name, takes, taken in query.all()]
+    rows.sort(key=lambda row: row['quantitytaken'], reverse=True)
+    columns = ['employeesso', 'employeename', 'takes', 'quantitytaken']
+    if request.args.get('format') == 'csv':
+        return _csv_response(rows, columns, 'printedparts-by-person.csv')
+    return success_response({'columns': columns, 'rows': rows, 'days': days})

plugins/printedparts/plugin.py

@@ -62,6 +62,32 @@ class PrintedpartsPlugin(BasePlugin):
              'printedparts'),
         ]
 
+    def get_reports(self) -> List[dict]:
+        return [
+            {
+                'id': 'printedparts-stock',
+                'name': '3D Parts Stock',
+                'description': 'Stock levels with low-stock flags and the '
+                               'cache-vs-ledger reconcile check',
+                'category': 'inventory',
+                'endpoint': '/api/printedparts/reports/stock',
+            },
+            {
+                'id': 'printedparts-consumption',
+                'name': '3D Parts Consumption',
+                'description': 'Takes per item over a date range',
+                'category': 'usage',
+                'endpoint': '/api/printedparts/reports/consumption',
+            },
+            {
+                'id': 'printedparts-by-person',
+                'name': '3D Parts by Person',
+                'description': 'Takes grouped by employee',
+                'category': 'usage',
+                'endpoint': '/api/printedparts/reports/by-person',
+            },
+        ]
+
     def get_navigation_items(self) -> List[dict]:
         return [
             {

tests/test_plugins/test_printedparts_ledger.py

@@ -128,3 +128,41 @@ def test_member_without_permission_gets_403(client, member_headers, item):
     assert client.post(f'/api/printedparts/items/{item}/restock',
                        json={'quantity': 1, 'badge': '1'},
                        headers=member_headers).status_code == 403
+
+
+def test_kiosk_take_is_open_decrement_only(client, auth_headers, app, item,
+                                           directory_employee):
+    """The kiosk endpoint needs no auth but only ever decrements stock."""
+    itemcode = '3DP-9001'
+    stocked = client.post(f'/api/printedparts/items/{item}/restock',
+                          json={'quantity': 5, 'badge': directory_employee},
+                          headers=auth_headers)
+    assert stocked.status_code == 200
+
+    lookup = client.get(f'/api/printedparts/kiosk/item/{itemcode}')
+    assert lookup.status_code == 200
+
+    take = client.post('/api/printedparts/kiosk/take', json={
+        'itemcode': itemcode, 'badge': directory_employee, 'quantity': 2})
+    assert take.status_code == 200, take.get_json()
+    assert take.get_json()['data']['quantityonhand'] == 3
+
+    too_many = client.post('/api/printedparts/kiosk/take', json={
+        'itemcode': itemcode, 'badge': directory_employee, 'quantity': 99})
+    assert too_many.status_code == 400
+
+    unknown = client.post('/api/printedparts/kiosk/take', json={
+        'itemcode': itemcode, 'badge': '111111111', 'quantity': 1})
+    assert unknown.status_code == 422
+
+    with app.app_context():
+        rows = PrintedItemTransaction.query.filter_by(
+            printeditemid=item, transactiontype='take').all()
+        assert len(rows) == 1
+        assert rows[0].quantitychange == -2
+        assert rows[0].employeename == 'Pat Printer'
+        cached = db.session.get(PrintedItem, item).quantityonhand
+        ledgersum = sum(r.quantitychange for r in
+                        PrintedItemTransaction.query.filter_by(
+                            printeditemid=item).all())
+        assert cached == ledgersum