cost-breakdown
Break down Claude Code costs using the Agent Monitor pricing engine. Shows per-model costs (input, output, cache_read, cache_write at $/Mtok rates), per-session costs, daily trends, and compaction baseline token recovery. Use when analyzing spending, comparing model costs, or planning budgets.
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill cost-breakdown --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Cost Breakdown Detailed cost analysis from the Agent Monitor's pricing engine. ## Input The user provides: **$ARGUMENTS** This may be: "today", "this week", "last 30 days", a session ID, or "budget $50/week". ## Data Sources | Endpoint | Returns | |----------|---------| | `GET /api/pricing` | `{ pricing: [{ model_pattern, display_name, input_per_mtok, output_per_mtok, cache_read_per_mtok, cache_write_per_mtok }] }` | | `GET /api/pricing/cost` | Total cost: `{ total_cost, breakdown: [{ model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost, matched_rule }] }` | | `GET /api/pricing/cost/{sessionId}` | Per-session cost with same breakdown shape | | `GET /api/sessions?limit=200` | Sessions list — each includes inline `cost` field (bulk pricing) | | `GET /api/analytics` | Token totals (total_input, total_output, total_cache_read, total_cache_write — baselines pre-summed), daily trends | ### How costs are calculated The pricing engine matches model names against `model_pattern` using SQL LIKE (e.g. `claude-sonnet-4-5%` matches `claude-sonnet-4-5-20250514`). **Longest pattern wins** for specificity. Cost per model: ``` cost = (input_tokens / 1M) × input_per_mtok
- Input
- Data Sources
- How costs are calculated
- Default pricing tiers (seeded on first run)
- Report Sections
- 1. Cost by Model
- 2. Cost by Session (Top 10 Most Expensive)
- 3. Daily Cost Trend
- 4. Token Efficiency Analysis
- 5. Cost Optimization Opportunities
- Output
What does the cost-breakdown skill do?
Break down Claude Code costs using the Agent Monitor pricing engine. Shows per-model costs (input, output, cache_read, cache_write at $/Mtok rates), per-session costs, daily trends, and compaction baseline token recovery. Use when analyzing spending, comparing model costs, or planning budgets.
How do I install it?
Run `npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill cost-breakdown --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From hoangsonww/Claude-Code-Agent-Monitor, a repository with 869 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.