diff --git a/docs/ACCEPTANCE.md b/docs/ACCEPTANCE.md
index e033751b..c9ded0f6 100644
--- a/docs/ACCEPTANCE.md
+++ b/docs/ACCEPTANCE.md
@@ -704,7 +704,12 @@ two-layer drift detection this discharges),
    `with_tools` above zero (that is the body join, step 4's fields arriving in
    columns); `with_cwd` and `with_branch` above zero (that is the SessionStart
    hook, which is where cwd and git identity come from on this path, not the
-   events); `with_version` above zero (`app.version` off the events).
+   events); `with_version` above zero (`app.version` off the events on
+   2.1.233, or `service.version` off the export's OTLP resource from 2.1.235,
+   where the event attribute is gone: the projector reads both, so a null
+   here across a whole session means the version reached neither place: a
+   third upstream shape or a broken fallback, filed as new drift the way
+   #854 was, not #854 itself).
    `with_cwd = 0` with everything else healthy means the hook is not installed
    and the usage policy is running blind, which is a release blocker on its own.
 
@@ -756,9 +761,15 @@ two-layer drift detection this discharges),
    `model`, `input_tokens`, `output_tokens`, and the cache-token pair; the
    `permission_mode_changed` row's `attributes` carry `from_mode` and
    `to_mode`. Every row's `attributes` should carry the identity block
-   (`app.version`, `app.entrypoint`, `user.account_uuid`, `organization.id`,
-   `terminal.type`). Pass `--max-bytes 0` or the display truncates the JSON and
-   you will read a short value as a missing one.
+   (`user.account_uuid`, `organization.id`, `terminal.type`, plus
+   `app.version` and `app.entrypoint` on clients that still send them: 2.1.235
+   moved the version to the OTLP resource, so its absence here is upstream
+   shape, not a capture fault. That same capture carries no `app.entrypoint`
+   on the events either and the resource offers no replacement for it, so
+   `ai_gateway_messages.entrypoint` is null on that client: a separate gap
+   from #854, and not something this step passes or fails on). Pass
+   `--max-bytes 0` or the display truncates the JSON and you will read a short
+   value as a missing one.
 
 9. Confirm the capture-health line agrees, which is the production half of the
    same duty:
diff --git a/hypaware-core/plugins-workspace/claude/src/telemetry/events.js b/hypaware-core/plugins-workspace/claude/src/telemetry/events.js
index 3edad744..d6ff1dea 100644
--- a/hypaware-core/plugins-workspace/claude/src/telemetry/events.js
+++ b/hypaware-core/plugins-workspace/claude/src/telemetry/events.js
@@ -35,6 +35,12 @@ const SELF_MARKER_KEY = 'hypaware.self'
  * nothing. An exporter we cannot fix from our side must not be able to
  * fail the request.
  *
+ * The group's decoded resource attributes ride along on every event it
+ * produced, because some of what a row needs is reported once per export
+ * rather than per record: Claude Code 2.1.235 stamps its version on the
+ * resource as `service.version` and no longer sends `app.version` on the
+ * events at all.
+ *
  * @ref LLP 0257#registration [implements]: the shared server carries the
  *   transport; payload interpretation is claude-owned, including the
  *   self-telemetry loop guard
@@ -51,7 +57,8 @@ export function flattenClaudeTelemetryEvents(data) {
   for (const groupValue of groups) {
     const group = asObject(groupValue)
     if (!group) continue
-    if (resourceHasSelfMarker(group.resource)) continue
+    const resource = decodeAttributes(asObject(group.resource)?.attributes)
+    if (hasSelfMarker(resource)) continue
     const scopes = Array.isArray(group.scopeLogs) ? group.scopeLogs : []
     for (const scopeValue of scopes) {
       const scopeLog = asObject(scopeValue)
@@ -60,7 +67,7 @@ export function flattenClaudeTelemetryEvents(data) {
       if (!scopeName || !scopeName.startsWith(CLAUDE_EVENT_SCOPE_PREFIX)) continue
       const records = Array.isArray(scopeLog.logRecords) ? scopeLog.logRecords : []
       for (const recordValue of records) {
-        const event = eventFromRecord(recordValue)
+        const event = eventFromRecord(recordValue, resource)
         if (event) events.push(event)
       }
     }
@@ -96,7 +103,8 @@ export function flattenClaudeTelemetryMetrics(data) {
   for (const groupValue of groups) {
     const group = asObject(groupValue)
     if (!group) continue
-    if (resourceHasSelfMarker(group.resource)) continue
+    const resource = decodeAttributes(asObject(group.resource)?.attributes)
+    if (hasSelfMarker(resource)) continue
     const scopes = Array.isArray(group.scopeMetrics) ? group.scopeMetrics : []
     for (const scopeValue of scopes) {
       const scopeMetric = asObject(scopeValue)
@@ -111,7 +119,7 @@ export function flattenClaudeTelemetryMetrics(data) {
         if (!name) continue
         const unit = stringOf(metric.unit)
         for (const pointValue of metricDataPoints(metric)) {
-          const event = eventFromDataPoint(name, unit, pointValue)
+          const event = eventFromDataPoint(name, unit, pointValue, resource)
           if (event) events.push(event)
         }
       }
@@ -125,9 +133,10 @@ export function flattenClaudeTelemetryMetrics(data) {
  * @param {string} name
  * @param {string | undefined} unit
  * @param {unknown} value one OTLP `NumberDataPoint`
+ * @param {Record<string, unknown>} resource the group's decoded resource attributes
  * @returns {ClaudeTelemetryEvent | undefined}
  */
-function eventFromDataPoint(name, unit, value) {
+function eventFromDataPoint(name, unit, value, resource) {
   const point = asObject(value)
   if (!point) return undefined
   const attributes = decodeAttributes(point.attributes)
@@ -142,6 +151,7 @@ function eventFromDataPoint(name, unit, value) {
     name,
     attributes,
     ...(timestamp ? { timestamp } : {}),
+    ...(hasKeys(resource) ? { resource } : {}),
   }
 }
 
@@ -164,9 +174,10 @@ function metricDataPoints(metric) {
 
 /**
  * @param {unknown} value
+ * @param {Record<string, unknown>} resource the group's decoded resource attributes
  * @returns {ClaudeTelemetryEvent | undefined}
  */
-function eventFromRecord(value) {
+function eventFromRecord(value, resource) {
   const record = asObject(value)
   if (!record) return undefined
   const attributes = decodeAttributes(record.attributes)
@@ -181,6 +192,7 @@ function eventFromRecord(value) {
     attributes,
     ...(timestamp ? { timestamp } : {}),
     ...(sequence !== undefined ? { sequence } : {}),
+    ...(hasKeys(resource) ? { resource } : {}),
   }
 }
 
@@ -231,15 +243,22 @@ function decodeAnyValue(value) {
 }
 
 /**
- * @param {unknown} resource
+ * @param {Record<string, unknown>} resource decoded resource attributes
  * @returns {boolean}
  */
-function resourceHasSelfMarker(resource) {
-  const attrs = decodeAttributes(asObject(resource)?.attributes)
-  const marker = attrs[SELF_MARKER_KEY]
+function hasSelfMarker(resource) {
+  const marker = resource[SELF_MARKER_KEY]
   return marker === true || marker === 'true'
 }
 
+/**
+ * @param {Record<string, unknown>} value
+ * @returns {boolean}
+ */
+function hasKeys(value) {
+  return Object.keys(value).length > 0
+}
+
 /**
  * @param {unknown} value nanoseconds since the epoch, as a string or number
  * @returns {string | undefined}
diff --git a/hypaware-core/plugins-workspace/claude/src/telemetry/projection.js b/hypaware-core/plugins-workspace/claude/src/telemetry/projection.js
index ef061fe5..2072a507 100644
--- a/hypaware-core/plugins-workspace/claude/src/telemetry/projection.js
+++ b/hypaware-core/plugins-workspace/claude/src/telemetry/projection.js
@@ -470,7 +470,14 @@ function sessionFacts(event) {
  * @param {ClaudeTelemetryEvent} event
  */
 function mergeSessionFacts(facts, event) {
-  facts.clientVersion ??= stringAttr(event, 'app.version')
+  // Event first, resource second: Claude Code 2.1.233 put the version on
+  // every event as `app.version` and 2.1.235 puts it only on the export's
+  // resource as `service.version`, so reading both keeps one code path
+  // correct across the drift instead of trading one version floor for the
+  // other.
+  // @ref LLP 0262#field-parity-r1 [implements]: `client_version` is a column
+  // the OTEL path owes parity on, whichever place the client reports it
+  facts.clientVersion ??= stringAttr(event, 'app.version') ?? resourceAttr(event, 'service.version')
   facts.entrypoint ??= stringAttr(event, 'app.entrypoint')
   facts.userId ??= stringAttr(event, 'user.account_uuid')
   facts.organizationId ??= stringAttr(event, 'organization.id')
@@ -492,6 +499,18 @@ function mergeSessionFacts(facts, event) {
   }
 }
 
+/**
+ * A string fact off the export's resource rather than the event itself.
+ *
+ * @param {ClaudeTelemetryEvent} event
+ * @param {string} key
+ * @returns {string | undefined}
+ */
+function resourceAttr(event, key) {
+  const value = event.resource?.[key]
+  return typeof value === 'string' && value.length > 0 ? value : undefined
+}
+
 /**
  * @param {ClaudeTelemetryEvent} event
  * @param {string} key
diff --git a/hypaware-core/plugins-workspace/claude/src/types.d.ts b/hypaware-core/plugins-workspace/claude/src/types.d.ts
index e8ad5a32..bdd2d284 100644
--- a/hypaware-core/plugins-workspace/claude/src/types.d.ts
+++ b/hypaware-core/plugins-workspace/claude/src/types.d.ts
@@ -28,6 +28,14 @@ export interface ClaudeTelemetryEvent {
   sequence?: number
   /** Every attribute on the record, unwrapped. */
   attributes: Record<string, unknown>
+  /**
+   * The OTLP resource attributes of the export this event arrived in,
+   * unwrapped. Present only when the resource carried any. Kept separate from
+   * `attributes` because it describes the exporting process, not the event:
+   * `claude_telemetry_events` rows stay per-event, and the projector reads it
+   * only for facts Claude Code reports once per export (`service.version`).
+   */
+  resource?: Record<string, unknown>
 }
 
 /**
diff --git a/test/plugins/claude-telemetry-listener.test.js b/test/plugins/claude-telemetry-listener.test.js
index 576f315f..6d3440db 100644
--- a/test/plugins/claude-telemetry-listener.test.js
+++ b/test/plugins/claude-telemetry-listener.test.js
@@ -197,6 +197,61 @@ test('one turn projects to a user row and an assistant row with native uuids', (
   assert.equal(assistant.model, 'claude-haiku-4-5-20251001')
 })
 
+/**
+ * Claude Code 2.1.235 stopped sending `app.version` on the events and
+ * reports its version once per export, on the OTLP resource, as
+ * `service.version`. The column has to survive that drift.
+ *
+ * @ref LLP 0262#field-parity-r1 [tests]: `client_version` stays populated on
+ *   the OTEL path across the upstream shape change
+ */
+test('client_version falls back to the resource service.version when no event carries app.version', () => {
+  const records = turnRecords().map((entry) => ({
+    ...entry,
+    attributes: entry.attributes.filter((attr) => attr.key !== 'app.version'),
+  }))
+  const events = flattenClaudeTelemetryEvents(envelope(records, {
+    'service.name': 'claude-code',
+    'service.version': '2.1.235',
+  }))
+  assert.equal(events.every((event) => event.attributes['app.version'] === undefined), true)
+  const [projection] = projectClaudeTelemetryEvents(events, {
+    clientName: 'claude',
+    usageByRequestId: new Map(),
+  })
+  assert.equal(projection.client_version, '2.1.235')
+  for (const row of aiGatewayRowsFromProjectedExchange(projection)) {
+    assert.equal(row.client_version, '2.1.235')
+  }
+})
+
+test('an event-level app.version still outranks the resource service.version', () => {
+  const events = flattenClaudeTelemetryEvents(envelope(turnRecords(), {
+    'service.name': 'claude-code',
+    'service.version': '2.1.235',
+  }))
+  const [projection] = projectClaudeTelemetryEvents(events, {
+    clientName: 'claude',
+    usageByRequestId: new Map(),
+  })
+  assert.equal(projection.client_version, '2.1.233')
+  for (const row of aiGatewayRowsFromProjectedExchange(projection)) {
+    assert.equal(row.client_version, '2.1.233')
+  }
+})
+
+test('a resource with no service.version leaves client_version unset rather than empty', () => {
+  const records = turnRecords().map((entry) => ({
+    ...entry,
+    attributes: entry.attributes.filter((attr) => attr.key !== 'app.version'),
+  }))
+  const [projection] = projectClaudeTelemetryEvents(
+    flattenClaudeTelemetryEvents(envelope(records)),
+    { clientName: 'claude', usageByRequestId: new Map() },
+  )
+  assert.equal(projection.client_version, undefined)
+})
+
 test('api_request usage lands on the assistant message it names', () => {
   const [projection] = projectAll(turnRecords())
   const assistant = projection.messages[1]