optimize: per-group subtotals in every finding render

Each class header now carries its own token/dollar subtotal and finding
count, so the apply-able slice is never mistaken for the whole board; the
headline savings line names that slice explicitly. CLI and TUI share one
classHeaderLine helper, the desktop app reads the same numbers from the
new summary.byClass in --format json (add-only; the three subtotals sum to
findingCount and potentialSavingsTokens).

Also scopes the SHELL_PROFILE_SCOPE comment to what is actually true: the
MCP deferral plans refuse to rewrite a shell profile, but bash-output-cap
appends its own marker block to one.

app/renderer/App.test.tsx

@@ -139,6 +139,11 @@ function installDefaultMocks() {
       healthScore: 100, healthGrade: 'A', findingCount: 0, periodCostUSD: 0,
       sessions: 0, calls: 0, potentialSavingsTokens: 0, potentialSavingsCostUSD: 0,
       potentialSavingsPercent: 0, costRateUSD: 0, measuredSavingsUSD: 0,
+      byClass: {
+        fix: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+        nudge: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+        keep: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+      },
     },
     findings: [],
   })

app/renderer/lib/types.ts

@@ -423,6 +423,7 @@ export type OptimizeJsonReport = {
     potentialSavingsPercent: number | null
     costRateUSD: number
     measuredSavingsUSD: number
+    byClass: Record<FindingClass, { tokensSaved: number; savingsUSD: number; count: number }>
   }
   findings: Array<{
     id: string

app/renderer/sections/Optimize.test.tsx

@@ -49,6 +49,11 @@ function makeOptimizeReport(): OptimizeJsonReport {
       sessions: 88, calls: 1220, potentialSavingsTokens: 184_000,
       potentialSavingsCostUSD: 94.4, potentialSavingsPercent: 15.4, costRateUSD: 0.0005,
       measuredSavingsUSD: 27.8,
+      byClass: {
+        fix: { tokensSaved: 18_200, savingsUSD: 9.1, count: 1 },
+        nudge: { tokensSaved: 17_400, savingsUSD: 8.7, count: 1 },
+        keep: { tokensSaved: 4_800, savingsUSD: 2.4, count: 1 },
+      },
     },
     findings: [
       {
@@ -129,7 +134,11 @@ describe('Optimize', () => {
 
     await screen.findByText('Opus is doing your small talk')
     const groups = document.querySelectorAll('.opt-group')
-    expect([...groups].map(g => g.textContent)).toEqual(['Fix now (apply-able)', 'Habits', 'FYI'])
+    expect([...groups].map(g => g.textContent)).toEqual([
+      'Fix now (apply-able) · 18.2K tokens · $9.10 · 1 finding',
+      'Habits · 17.4K tokens · $8.70 · 1 finding',
+      'FYI · 4.8K tokens · $2.40 · 1 finding',
+    ])
   })
 
   it('renders tabs and actionable Waste findings with impact, savings, explanation, and copy-paste fix', async () => {

app/renderer/sections/Optimize.tsx

@@ -101,7 +101,7 @@ function WasteRows({ report }: { report: Polled<OptimizeJsonReport> }) {
       <div className="opt-summary">
         {report.data.summary.findingCount.toLocaleString('en-US')} findings · {formatUsd(report.data.summary.potentialSavingsCostUSD)} potential · health {report.data.summary.healthScore}/100
       </div>
-      <ActionableFindingRows findings={report.data.findings} />
+      <ActionableFindingRows findings={report.data.findings} byClass={report.data.summary.byClass} />
     </div>
   )
 }
@@ -124,7 +124,7 @@ function actionText(fix: WasteAction): string {
   return fix.type === 'file-content' ? fix.content : fix.text
 }
 
-function ActionableFindingRows({ findings }: { findings: OptimizeFinding[] }) {
+function ActionableFindingRows({ findings, byClass }: { findings: OptimizeFinding[]; byClass: OptimizeJsonReport['summary']['byClass'] }) {
   const [expandedId, setExpandedId] = useState<string | null>(null)
   const [copiedId, setCopiedId] = useState<string | null>(null)
 
@@ -145,7 +145,11 @@ function ActionableFindingRows({ findings }: { findings: OptimizeFinding[] }) {
         const showHeader = finding.class !== findings[i - 1]?.class
         return (
           <Fragment key={finding.id}>
-            {showHeader && <div className="opt-group">{CLASS_HEADERS[finding.class]}</div>}
+            {showHeader && (
+              <div className="opt-group">
+                {CLASS_HEADERS[finding.class]} · {formatCompact(byClass[finding.class].tokensSaved)} tokens · {formatUsd(byClass[finding.class].savingsUSD)} · {byClass[finding.class].count} {byClass[finding.class].count === 1 ? 'finding' : 'findings'}
+              </div>
+            )}
             <button
               className="opt-finding opt-finding-toggle"
               type="button"

src/dashboard.tsx

@@ -10,7 +10,7 @@ import { findUnpricedModels, isExpectedFreeModel, loadPricing } from './models.j
 import { aggregateModelTotals } from './model-breakdown.js'
 import { buildDurablePeriod } from './usage-aggregator.js'
 import { getAllProviders } from './providers/index.js'
-import { CLASS_HEADERS, findingBasis, findingClass, scanAndDetect, type FindingClass, type WasteFinding, type WasteAction, type OptimizeResult } from './optimize.js'
+import { classHeaderLine, classTotals, findingBasis, findingClass, scanAndDetect, type FindingClass, type WasteFinding, type WasteAction, type OptimizeResult } from './optimize.js'
 import { aggregateFileChurn, buildCoachingNotes, computePricingCoverage, medianTimeToFirstEditMs, scanUserCorrections, worstOneShotCategory, type ReworkedFile } from './workflow-insights.js'
 import { estimateContextBudget, type ContextBudget } from './context-budget.js'
 import { dateKey } from './day-aggregator.js'
@@ -1105,6 +1105,7 @@ function OptimizeView({ findings, costRate, projects, label, width, healthScore,
   const start = total === 0 ? 0 : Math.min(cursor, Math.max(0, total - FINDINGS_WINDOW_SIZE))
   const end = Math.min(start + FINDINGS_WINDOW_SIZE, total)
   const visible = findings.slice(start, end)
+  const totals = classTotals(findings, costRate)
   return (
     <Box flexDirection="column" width={width}>
       <Box flexDirection="column" borderStyle="round" borderColor={ORANGE} paddingX={1} width={width}>
@@ -1126,7 +1127,7 @@ function OptimizeView({ findings, costRate, projects, label, width, healthScore,
         const previous: FindingClass | null = i > 0 ? findingClass(visible[i - 1]!) : null
         return (
           <Fragment key={start + i}>
-            {cls !== previous && <Box paddingX={1} width={width}><Text bold color={ORANGE}>{CLASS_HEADERS[cls]}</Text></Box>}
+            {cls !== previous && <Box paddingX={1} width={width}><Text bold color={ORANGE} wrap="truncate-end">{classHeaderLine(cls, totals[cls], costRate)}</Text></Box>}
             <FindingPanel index={start + i + 1} finding={f} costRate={costRate} width={width} />
           </Fragment>
         )

src/optimize.ts

@@ -341,8 +341,10 @@ export const FINDING_BASIS: Record<FindingId, FindingBasis> = {
   'unused-commands': 'estimated',          // count x TOKENS_PER_COMMAND_DEF
 }
 
-/// Scope label for a setting that lives in ~/.zshrc / ~/.bashrc. Plans never
-/// rewrite shell profiles, they only report them.
+/// Scope label for a setting that lives in ~/.zshrc / ~/.bashrc. The MCP
+/// deferral plans (defer-enable, defer-threshold) refuse to rewrite an
+/// override found there and report it instead; bash-output-cap does append
+/// its own marker block to the shell rc.
 export const SHELL_PROFILE_SCOPE = 'shell profile'
 
 export function findingClass(f: WasteFinding): FindingClass {
@@ -366,11 +368,36 @@ export function findingBasis(f: WasteFinding): FindingBasis {
 const CLASS_ORDER: Record<FindingClass, number> = { fix: 0, nudge: 1, keep: 2 }
 
 export const CLASS_HEADERS: Record<FindingClass, string> = {
-  fix: 'Fix now (apply-able)  — codeburn optimize --apply',
+  fix: 'Fix now (apply-able)',
   nudge: 'Habits',
   keep: 'FYI',
 }
 
+export type ClassTotals = { tokensSaved: number; savingsUSD: number; count: number }
+
+export function classTotals(findings: WasteFinding[], costRate: number): Record<FindingClass, ClassTotals> {
+  const totals: Record<FindingClass, ClassTotals> = {
+    fix: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+    nudge: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+    keep: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+  }
+  for (const f of findings) {
+    const t = totals[findingClass(f)]
+    t.tokensSaved += f.tokensSaved
+    t.savingsUSD += f.tokensSaved * costRate
+    t.count++
+  }
+  return totals
+}
+
+/// Group header with its own subtotal, shared by the CLI and the TUI so the
+/// two never drift apart.
+export function classHeaderLine(cls: FindingClass, totals: ClassTotals, costRate: number): string {
+  const cost = costRate > 0 ? ` (~${formatCost(totals.savingsUSD)})` : ''
+  const suffix = cls === 'fix' ? ' — codeburn optimize --apply' : ''
+  return `${CLASS_HEADERS[cls]} · ~${formatTokens(totals.tokensSaved)} tokens${cost} · ${totals.count} finding${totals.count === 1 ? '' : 's'}${suffix}`
+}
+
 // Cause taxonomy for defer-enable plans (mcp-deferral-off findings).
 // 'proxy-verified' is never produced by the detector today: it is reserved
 // for the #614 part-3 proxy verifier, which upgrades 'proxy-unknown' once a
@@ -443,6 +470,9 @@ export type OptimizeJsonReport = {
     /// Portion of `potentialSavingsCostUSD` coming from `measured`-basis
     /// findings. The total keeps its old meaning: measured plus estimated.
     measuredSavingsUSD: number
+    /// Per-class subtotals; the three counts and token sums add up to
+    /// `findingCount` and `potentialSavingsTokens`.
+    byClass: Record<FindingClass, ClassTotals>
   }
   findings: Array<{
     id: FindingId
@@ -3385,8 +3415,12 @@ export function renderOptimize(
   const pctRaw = periodCost > 0 ? (totalCost / periodCost) * 100 : 0
   const pct = pctRaw >= 1 ? pctRaw.toFixed(0) : pctRaw.toFixed(1)
 
+  const totals = classTotals(findings, costRate)
   const costText = costRate > 0 ? ` (~${formatCost(totalCost)}, ~${pct}% of spend)` : ''
-  lines.push(chalk.hex(GREEN)(`  Potential savings: ~${formatTokens(totalTokens)} tokens${costText}`))
+  // The headline is the whole board; name the apply-able slice separately so
+  // it never reads as "what CodeBurn can fix for you".
+  const applyable = costRate > 0 && totals.fix.count > 0 ? ` — apply-able: ~${formatCost(totals.fix.savingsUSD)}` : ''
+  lines.push(chalk.hex(GREEN)(`  Potential savings: ~${formatTokens(totalTokens)} tokens${costText}${applyable}`))
   lines.push('')
 
   // One block per class, in fix -> nudge -> keep order; numbering runs
@@ -3395,7 +3429,7 @@ export function renderOptimize(
   for (const cls of ['fix', 'nudge', 'keep'] as const) {
     const group = findings.filter(f => findingClass(f) === cls)
     if (group.length === 0) continue
-    lines.push(chalk.bold.hex(ORANGE)(`  ${CLASS_HEADERS[cls]}`))
+    lines.push(chalk.bold.hex(ORANGE)(`  ${classHeaderLine(cls, totals[cls], costRate)}`))
     lines.push('')
     for (const f of group) {
       const appliedOn = previouslyApplied?.[f.id]
@@ -3507,6 +3541,7 @@ export function buildOptimizeJsonReport(
       measuredSavingsUSD: result.findings
         .filter(f => findingBasis(f) === 'measured')
         .reduce((s, f) => s + f.tokensSaved * result.costRate, 0),
+      byClass: classTotals(result.findings, result.costRate),
     },
     findings: result.findings.map(f => ({
       id: f.id,

tests/optimize.test.ts

@@ -1311,6 +1311,15 @@ describe('buildOptimizeJsonReport', () => {
       costRateUSD: 0.00002,
     })
     expect(report.summary.measuredSavingsUSD).toBe(0)
+    expect(report.summary.byClass).toEqual({
+      fix: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+      nudge: { tokensSaved: 50_000, savingsUSD: 1, count: 1 },
+      keep: { tokensSaved: 0, savingsUSD: 0, count: 0 },
+    })
+    const classes = Object.values(report.summary.byClass)
+    expect(classes.reduce((s, c) => s + c.tokensSaved, 0)).toBe(report.summary.potentialSavingsTokens)
+    expect(classes.reduce((s, c) => s + c.savingsUSD, 0)).toBeCloseTo(report.summary.potentialSavingsCostUSD, 10)
+    expect(classes.reduce((s, c) => s + c.count, 0)).toBe(report.summary.findingCount)
     expect(report.findings[0]).toMatchObject({
       title: 'Trim stale context',
       severity: 'medium',
@@ -1349,9 +1358,15 @@ describe('renderOptimize grouping', () => {
     ]
     const out = plain(renderOptimize(findings, 0.00001, '7 Days', 10, 5, 100, 80, 'B', [], []))
 
-    const headers = ['Fix now (apply-able)', 'Habits', 'FYI'].map(h => out.indexOf(h))
+    const headers = [
+      'Fix now (apply-able) · ~1.0K tokens (~$0.010) · 1 finding — codeburn optimize --apply',
+      'Habits · ~1.0K tokens (~$0.010) · 1 finding',
+      'FYI · ~1.0K tokens (~$0.010) · 1 finding',
+    ].map(h => out.indexOf(h))
     expect(headers.every(i => i >= 0)).toBe(true)
     expect(headers).toEqual([...headers].sort((a, b) => a - b))
+    // Headline is the whole board; the apply-able slice is named separately.
+    expect(out).toContain('Potential savings: ~3.0K tokens (~$0.030, ~0.3% of spend) — apply-able: ~$0.010')
     expect(out).toContain('1. Cap bash output')
     expect(out).toContain('2. Trim CLAUDE.md')
     expect(out).toContain('3. Context-heavy sessions')