diff --git a/src/main/codex-usage/codex-usage-event-attribution.ts b/src/main/codex-usage/codex-usage-event-attribution.ts
index 4cde7a74af8..8ebf7fbc5e3 100644
--- a/src/main/codex-usage/codex-usage-event-attribution.ts
+++ b/src/main/codex-usage/codex-usage-event-attribution.ts
@@ -1,67 +1,13 @@
-import { normalizeComparablePath } from '../usage/usage-path-comparison'
+import { attributeUsageEvent } from '../usage/usage-event-attribution'
 import type { UsageScanWorktreeRef } from '../usage/usage-provider-contract'
 import type { UsageWorktreeResolver } from '../usage/usage-worktree-resolver'
 import type { CodexUsageAttributedEvent, CodexUsageParsedEvent } from './types'
 
 export type CodexUsageWorktreeRef = UsageScanWorktreeRef
 
-function getDefaultProjectLabel(cwd: string | null): string {
-  if (!cwd) {
-    return 'Unknown location'
-  }
-  const parts = cwd.replace(/\\/g, '/').split('/').filter(Boolean)
-  if (parts.length >= 2) {
-    return parts.slice(-2).join('/')
-  }
-  return parts.at(-1) ?? cwd
-}
-
-function localDayFromTimestamp(timestamp: string): string | null {
-  const parsed = new Date(timestamp)
-  if (Number.isNaN(parsed.getTime())) {
-    return null
-  }
-  const year = parsed.getFullYear()
-  const month = String(parsed.getMonth() + 1).padStart(2, '0')
-  const day = String(parsed.getDate()).padStart(2, '0')
-  return `${year}-${month}-${day}`
-}
-
 export async function attributeCodexUsageEvent(
   event: CodexUsageParsedEvent,
   resolveWorktree: UsageWorktreeResolver
 ): Promise<CodexUsageAttributedEvent | null> {
-  const day = localDayFromTimestamp(event.timestamp)
-  if (!day) {
-    return null
-  }
-
-  let repoId: string | null = null
-  let worktreeId: string | null = null
-  let projectKey = 'unscoped'
-  let projectLabel = getDefaultProjectLabel(event.cwd)
-
-  if (event.cwd) {
-    const worktree = resolveWorktree(event.cwd)
-    if (worktree) {
-      repoId = worktree.repoId
-      worktreeId = worktree.worktreeId
-      projectKey = `worktree:${worktree.worktreeId}`
-      projectLabel = worktree.displayName
-    } else {
-      // Why: all-local mode should still collapse repeated off-Orca sessions by
-      // location, but those keys must normalize slash/case differences so the
-      // same folder does not fragment into multiple "projects" across platforms.
-      projectKey = `cwd:${normalizeComparablePath(event.cwd)}`
-    }
-  }
-
-  return {
-    ...event,
-    day,
-    projectKey,
-    projectLabel,
-    repoId,
-    worktreeId
-  }
+  return attributeUsageEvent(event, resolveWorktree)
 }
diff --git a/src/main/codex-usage/codex-usage-scope-filters.ts b/src/main/codex-usage/codex-usage-scope-filters.ts
index 3efd8dbcd57..de023f50864 100644
--- a/src/main/codex-usage/codex-usage-scope-filters.ts
+++ b/src/main/codex-usage/codex-usage-scope-filters.ts
@@ -1,6 +1,6 @@
 import type { CodexUsageRange, CodexUsageScope } from '../../shared/codex-usage-types'
 import type { CodexUsagePersistedState } from './types'
-import { getLocalUsageDay, getUsageRangeCutoff } from '../usage/usage-calendar-range'
+import { filterUsageDaily, filterUsageSessions } from '../usage/usage-scope-filters'
 
 export type ScopedCodexUsageModelRow = {
   modelKey: string
@@ -19,16 +19,7 @@ export function getFilteredDaily(
   scope: CodexUsageScope,
   range: CodexUsageRange
 ) {
-  const cutoff = getUsageRangeCutoff(range)
-  return state.dailyAggregates.filter((entry) => {
-    if (cutoff && entry.day < cutoff) {
-      return false
-    }
-    if (scope === 'orca' && entry.worktreeId === null) {
-      return false
-    }
-    return true
-  })
+  return filterUsageDaily(state.dailyAggregates, scope, range)
 }
 
 export function getFilteredSessions(
@@ -36,20 +27,7 @@ export function getFilteredSessions(
   scope: CodexUsageScope,
   range: CodexUsageRange
 ) {
-  const cutoff = getUsageRangeCutoff(range)
-  return state.sessions.filter((session) => {
-    const day = getLocalUsageDay(session.lastTimestamp)
-    if (!day) {
-      return false
-    }
-    if (cutoff && day < cutoff) {
-      return false
-    }
-    if (scope === 'orca') {
-      return session.locationBreakdown.some((entry) => entry.worktreeId !== null)
-    }
-    return true
-  })
+  return filterUsageSessions(state.sessions, scope, range)
 }
 
 export function getScopedSessionModels(
diff --git a/src/main/usage/usage-event-attribution.ts b/src/main/usage/usage-event-attribution.ts
new file mode 100644
index 00000000000..25c696e6263
--- /dev/null
+++ b/src/main/usage/usage-event-attribution.ts
@@ -0,0 +1,47 @@
+import { getLocalUsageDay } from './usage-calendar-range'
+import { normalizeComparablePath } from './usage-path-comparison'
+import type { UsageWorktreeResolver } from './usage-worktree-resolver'
+
+export type UnattributedUsageEvent = {
+  timestamp: string
+  cwd: string | null
+}
+
+export type UsageEventAttribution = {
+  day: string
+  projectKey: string
+  projectLabel: string
+  repoId: string | null
+  worktreeId: string | null
+}
+
+function defaultProjectLabel(cwd: string | null): string {
+  if (!cwd) {
+    return 'Unknown location'
+  }
+  const parts = cwd.replace(/\\/g, '/').split('/').filter(Boolean)
+  return parts.length >= 2 ? parts.slice(-2).join('/') : (parts.at(-1) ?? cwd)
+}
+
+export function attributeUsageEvent<T extends UnattributedUsageEvent>(
+  event: T,
+  resolveWorktree: UsageWorktreeResolver
+): (T & UsageEventAttribution) | null {
+  const day = getLocalUsageDay(event.timestamp)
+  if (!day) {
+    return null
+  }
+  const worktree = event.cwd ? resolveWorktree(event.cwd) : null
+  return {
+    ...event,
+    day,
+    projectKey: worktree
+      ? `worktree:${worktree.worktreeId}`
+      : event.cwd
+        ? `cwd:${normalizeComparablePath(event.cwd)}`
+        : 'unscoped',
+    projectLabel: worktree?.displayName ?? defaultProjectLabel(event.cwd),
+    repoId: worktree?.repoId ?? null,
+    worktreeId: worktree?.worktreeId ?? null
+  }
+}
diff --git a/src/main/usage/usage-provider-contract.ts b/src/main/usage/usage-provider-contract.ts
index 2937af8b05c..3bb478955e8 100644
--- a/src/main/usage/usage-provider-contract.ts
+++ b/src/main/usage/usage-provider-contract.ts
@@ -7,7 +7,7 @@
  * consumer, so only the scan envelope is shared.
  */
 
-export type UsageProviderId = 'claude' | 'codex' | 'opencode' | `plugin:${string}`
+export type UsageProviderId = 'claude' | 'codex' | 'devin' | 'opencode' | `plugin:${string}`
 
 /** Scan input. Distinct from `UsageWorktreeRef` in usage-worktree-metadata, which lacks `repoId`. */
 export type UsageScanWorktreeRef = {
diff --git a/src/main/usage/usage-scope-filters.ts b/src/main/usage/usage-scope-filters.ts
new file mode 100644
index 00000000000..8d067e8199a
--- /dev/null
+++ b/src/main/usage/usage-scope-filters.ts
@@ -0,0 +1,31 @@
+import { getLocalUsageDay, getUsageRangeCutoff } from './usage-calendar-range'
+
+export function filterUsageDaily<T extends { day: string; worktreeId: string | null }>(
+  daily: readonly T[],
+  scope: 'orca' | 'all',
+  range: '7d' | '30d' | '90d' | 'all'
+): T[] {
+  const cutoff = getUsageRangeCutoff(range)
+  return daily.filter((entry) => {
+    if (cutoff && entry.day < cutoff) {
+      return false
+    }
+    return scope === 'all' || entry.worktreeId !== null
+  })
+}
+
+export function filterUsageSessions<
+  T extends {
+    lastTimestamp: string
+    locationBreakdown: readonly { worktreeId: string | null }[]
+  }
+>(sessions: readonly T[], scope: 'orca' | 'all', range: '7d' | '30d' | '90d' | 'all'): T[] {
+  const cutoff = getUsageRangeCutoff(range)
+  return sessions.filter((session) => {
+    const day = getLocalUsageDay(session.lastTimestamp)
+    if (!day || (cutoff && day < cutoff)) {
+      return false
+    }
+    return scope === 'all' || session.locationBreakdown.some((entry) => entry.worktreeId !== null)
+  })
+}