cta

name

cta

description

This skill should be used when the user asks to "analyze token usage", "check costs", "how much did I spend", "token analysis", "session analysis", "cta", or mentions Claude Code usage efficiency, token spending, or cost optimization. Routes to 6 workflow sub-skills: cta-health-check, cta-cost-audit, cta-anomaly-hunt, cta-project-review, cta-trend-watch, cta-usage-pattern. Also handles ambiguous intent with a quick overview. Do NOT trigger for: building token-related features, tokenizer/NLP work, or non-Claude cost analysis.

CTA — Claude Token Analyzer Router

Route token analysis requests to the appropriate workflow skill, or provide a quick overview for ambiguous intent.

Prerequisites

1. sync_db when freshness matters — Execute mcp__token-analyzer__sync_db before workflows that read SQLite-backed aggregates (analyze_global, analyze_project, cost_report, anomaly_scan, trend_report) when the user asks for latest data. Historical classify_session_pattern lookups can run directly against JSONL without waiting for sync_db.
2. Output language — Use 繁體中文 for prose. Keep English for technical terms (cache_hit_rate, session_id, subagent, tool names).
3. Error handling — Report MCP tool errors to the user; never swallow silently. State explicitly when results are empty.

Intent Routing

User Intent	Keywords	Route to
Quick status	「看看」「總覽」「花了多少」「現在狀況」	cta-health-check
Monthly cost	「這個月」「成本報告」「月度」「預算」	cta-cost-audit
Find anomalies	「異常」「有問題嗎」「診斷」「排查」	cta-anomaly-hunt
Project analysis	「分析專案」「專案健檢」「subagent」「工具使用」	cta-project-review
Trend forecast	「趨勢」「在漲嗎」「預測」「燃率」	cta-trend-watch
Usage pattern	「使用模式」「pattern 分析」「harness 優化」「工作流建議」「sparkline」	cta-usage-pattern

Routing Behavior

1. Clear intent — Invoke the matching sub-skill directly.
2. Ambiguous intent (「幫我看看 token」「分析一下」) — If latest data matters, run sync_db → analyze_global → output a one-page summary (format below) → ask which direction to explore.
3. Cross-domain — Sub-skills may route to each other mid-workflow.

Shared Output Format

Element	Format
Currency	$X.XX USD
Percentage	One decimal (85.3%)
session_id	First 8 chars (a1b2c3d4)
Token count	Thousands separator (125,000)
Large output (>50K chars)	Write to ${TMPDIR:-/tmp}/cta-*.md, report path
Cache hit rate <70%	Mark with warning
Subagent ratio >20%	Mark with notice

One-Page Summary Template (for ambiguous intent)

## CTA Overview

| Metric | Value |
|--------|-------|
| Total Sessions | X |
| Total Projects | X |
| Total Cost | $X.XX USD |
| Avg Cache Hit Rate | X.X% |
| Subagent Token Ratio | X.X% |

### Top 3 Projects (by cost)
1. project-name — $X.XX (N sessions)

### Top 3 Sessions (by cost)
1. a1b2c3d4 — $X.XX (project-name)

Follow with: 「要深入哪個方向？成本 / 異常 / 專案 / 趨勢」

Additional Resources

Reference Files

For complete MCP tool parameters, return types, and known caveats:

• references/tool-reference.md — 8 MCP tool quick reference with parameter defaults, advanced tuning, and known pitfalls

Sub-skills reference this file at the absolute path ${CLAUDE_PLUGIN_ROOT}/skills/cta/references/tool-reference.md.