Fix Gemini provider for JSONL format (CLI 0.39+)

Gemini CLI 0.39 switched from single JSON to JSONL with one object
per line and $set metadata lines. Parser now handles both formats.
Also updated --provider help text to list all providers.

src/cli.ts

@@ -286,7 +286,7 @@ program
   .option('-p, --period <period>', 'Starting period: today, week, 30days, month, all', 'week')
   .option('--from <date>', 'Start date (YYYY-MM-DD). Overrides --period when set')
   .option('--to <date>', 'End date (YYYY-MM-DD). Overrides --period when set')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .option('--format <format>', 'Output format: tui, json', 'tui')
   .option('--project <name>', 'Show only projects matching name (repeatable)', collect, [])
   .option('--exclude <name>', 'Exclude projects matching name (repeatable)', collect, [])
@@ -364,7 +364,7 @@ program
   .command('status')
   .description('Compact status output (today + week + month)')
   .option('--format <format>', 'Output format: terminal, menubar-json, json', 'terminal')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .option('--project <name>', 'Show only projects matching name (repeatable)', collect, [])
   .option('--exclude <name>', 'Exclude projects matching name (repeatable)', collect, [])
   .option('--period <period>', 'Primary period for menubar-json: today, week, 30days, month, all', 'today')
@@ -557,7 +557,7 @@ program
 program
   .command('today')
   .description('Today\'s usage dashboard')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .option('--format <format>', 'Output format: tui, json', 'tui')
   .option('--project <name>', 'Show only projects matching name (repeatable)', collect, [])
   .option('--exclude <name>', 'Exclude projects matching name (repeatable)', collect, [])
@@ -573,7 +573,7 @@ program
 program
   .command('month')
   .description('This month\'s usage dashboard')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .option('--format <format>', 'Output format: tui, json', 'tui')
   .option('--project <name>', 'Show only projects matching name (repeatable)', collect, [])
   .option('--exclude <name>', 'Exclude projects matching name (repeatable)', collect, [])
@@ -591,7 +591,7 @@ program
   .description('Export usage data to CSV or JSON (includes 1 day, 7 days, 30 days)')
   .option('-f, --format <format>', 'Export format: csv, json', 'csv')
   .option('-o, --output <path>', 'Output file path')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .option('--project <name>', 'Show only projects matching name (repeatable)', collect, [])
   .option('--exclude <name>', 'Exclude projects matching name (repeatable)', collect, [])
   .action(async (opts) => {
@@ -870,7 +870,7 @@ program
   .command('optimize')
   .description('Find token waste and get exact fixes')
   .option('-p, --period <period>', 'Analysis period: today, week, 30days, month, all', '30days')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .action(async (opts) => {
     await loadPricing()
     const { range, label } = getDateRange(opts.period)
@@ -882,7 +882,7 @@ program
   .command('compare')
   .description('Compare two AI models side-by-side')
   .option('-p, --period <period>', 'Analysis period: today, week, 30days, month, all', 'all')
-  .option('--provider <provider>', 'Filter by provider: all, claude, codex, cursor', 'all')
+  .option('--provider <provider>', 'Filter by provider (e.g. claude, gemini, cursor, copilot)', 'all')
   .action(async (opts) => {
     await loadPricing()
     const { range } = getDateRange(opts.period)

src/providers/gemini.ts

@@ -144,6 +144,40 @@ function parseSession(data: GeminiSession, seenKeys: Set<string>): ParsedProvide
   return results
 }
 
+function parseJsonl(raw: string): GeminiSession | null {
+  const lines = raw.split('\n').filter(l => l.trim())
+  if (lines.length === 0) return null
+
+  let sessionId = ''
+  let startTime = ''
+  let projectHash: string | undefined
+  let lastUpdated: string | undefined
+  let kind: string | undefined
+  const messages: GeminiMessage[] = []
+
+  for (const line of lines) {
+    let obj: Record<string, unknown>
+    try {
+      obj = JSON.parse(line)
+    } catch {
+      continue
+    }
+    if (obj['$set'] !== undefined) continue
+    if (obj['sessionId'] && obj['startTime'] && !sessionId) {
+      sessionId = obj['sessionId'] as string
+      startTime = obj['startTime'] as string
+      projectHash = obj['projectHash'] as string | undefined
+      lastUpdated = obj['lastUpdated'] as string | undefined
+      kind = obj['kind'] as string | undefined
+    } else if (obj['id'] && obj['type']) {
+      messages.push(obj as unknown as GeminiMessage)
+    }
+  }
+
+  if (!sessionId) return null
+  return { sessionId, projectHash, startTime, lastUpdated, kind, messages }
+}
+
 function createParser(source: SessionSource, seenKeys: Set<string>): SessionParser {
   return {
     async *parse(): AsyncGenerator<ParsedProviderCall> {
@@ -154,14 +188,21 @@ function createParser(source: SessionSource, seenKeys: Set<string>): SessionPars
         return
       }
 
-      let data: GeminiSession
+      let data: GeminiSession | null = null
+
+      // Try single JSON first (Gemini CLI <=0.38), then JSONL (>=0.39)
       try {
-        data = JSON.parse(raw)
-      } catch {
-        return
+        const parsed = JSON.parse(raw)
+        if (parsed.messages && parsed.sessionId) {
+          data = parsed
+        }
+      } catch { /* not single JSON */ }
+
+      if (!data) {
+        data = parseJsonl(raw)
       }
 
-      if (!data.messages || !data.sessionId) return
+      if (!data?.messages || !data.sessionId) return
 
       const calls = parseSession(data, seenKeys)
       for (const call of calls) {