nntrivi2001
57dc91585d
Internal SmartGift build of a Claude Code monitoring dashboard. Lanes: a durable unit of parallel agent work, one per working directory, tracked across session restarts. Managed lanes are git worktrees the dashboard provisions and can reset or remove behind a three-check destroy guard and a counted preflight; adopted lanes are directories you already own and are never destroyable. Pipelines: a lane moves through pipeline stages. A stage the agent declares with evidence renders green; a stage inferred from the tool-event stream renders dashed amber and never counts as done. Detection is forward-only within a 30-minute window, and never writes the declared stage. Workspace: one page at /run with a lane grid, the selected lane's pipeline, and a full Claude console behind a disclosure.
74 lines
3.3 KiB
Markdown
74 lines
3.3 KiB
Markdown
---
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description: >
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Break down Claude Code costs using the Agent Monitor pricing engine.
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Shows per-model costs (input, output, cache_read, cache_write at $/Mtok rates),
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per-session costs, daily trends, and compaction baseline token recovery.
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Use when analyzing spending, comparing model costs, or planning budgets.
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---
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# Cost Breakdown
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Detailed cost analysis from the Agent Monitor's pricing engine.
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## Input
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The user provides: **$ARGUMENTS**
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This may be: "today", "this week", "last 30 days", a session ID, or "budget $50/week".
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## Data Sources
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| Endpoint | Returns |
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|----------|---------|
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| `GET /api/pricing` | `{ pricing: [{ model_pattern, display_name, input_per_mtok, output_per_mtok, cache_read_per_mtok, cache_write_per_mtok }] }` |
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| `GET /api/pricing/cost` | Total cost: `{ total_cost, breakdown: [{ model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost, matched_rule }] }` |
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| `GET /api/pricing/cost/{sessionId}` | Per-session cost with same breakdown shape |
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| `GET /api/sessions?limit=200` | Sessions list — each includes inline `cost` field (bulk pricing) |
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| `GET /api/analytics` | Token totals (total_input, total_output, total_cache_read, total_cache_write — baselines pre-summed), daily trends |
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### How costs are calculated
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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:
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```
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cost = (input_tokens / 1M) × input_per_mtok
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+ (output_tokens / 1M) × output_per_mtok
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+ (cache_read_tokens / 1M) × cache_read_per_mtok
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+ (cache_write_tokens / 1M) × cache_write_per_mtok
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```
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Token counts are **effective totals** = `current + baseline` (baselines preserve pre-compaction tokens that would otherwise be lost when the transcript JSONL is rewritten).
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### Default pricing tiers (seeded on first run)
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| Family | Input $/Mtok | Output $/Mtok | Cache Read $/Mtok | Cache Write $/Mtok |
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|--------|-------------|--------------|-------------------|-------------------|
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| Opus 4.5/4.6 | $5 | $25 | $0.50 | $6.25 |
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| Sonnet 4/4.5/4.6 | $3 | $15 | $0.30 | $3.75 |
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| Haiku 4.5 | $1 | $5 | $0.10 | $1.25 |
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## Report Sections
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### 1. Cost by Model
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Table from `/api/pricing/cost` breakdown — each model with 4 token counts + cost. Highlight which pricing rule matched.
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### 2. Cost by Session (Top 10 Most Expensive)
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From sessions list with inline `cost` — sort descending. Show session name, model, duration, cost.
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### 3. Daily Cost Trend
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Cross-reference `daily_sessions` with per-session costs to compute daily spend. Show 7/30-day trend with direction arrows.
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### 4. Token Efficiency Analysis
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- **Cache hit rate**: `total_cache_read / (total_cache_read + total_input) × 100` — higher = more efficient
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- **Compaction baseline recovery**: Tokens preserved via baseline columns (tokens not lost to compaction)
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- **Output/input ratio**: Balanced ratio indicates good prompt efficiency
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### 5. Cost Optimization Opportunities
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- Sessions where cache_write >> cache_read (poor cache reuse)
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- Expensive models used for simple tasks (check subagent_type vs model)
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- Sessions with many compactions (context overflow = wasted tokens)
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## Output
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Structured Markdown with tables. Currency as USD to 4 decimal places. Include total and per-model subtotals.
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