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Mahiler1909 merged 2 commits into from
Mar 30, 2026
Merged

refactor: architecture overhaul and dynamic pricing for v0.3.0 #6

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78c2951
refactor: architecture overhaul for v0.3.0
Mahiler1909 Mar 30, 2026
ba64c3e
test: add comprehensive coverage for pricing-fetcher.ts
Mahiler1909 Mar 30, 2026
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26 changes: 22 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# burnlog

**Know where your Claude Code tokens go. Stop the bleeding.**
**Know where your AI coding tokens go. Stop the bleeding.**

[![npm version](https://img.shields.io/npm/v/burnlog)](https://www.npmjs.com/package/burnlog)
[![npm downloads](https://img.shields.io/npm/dm/burnlog)](https://www.npmjs.com/package/burnlog)
Expand Down Expand Up @@ -38,13 +38,22 @@ $ burnlog waste

## The problem

Claude Code sessions can cost $5-$200+. You have no idea where that goes. burnlog reads the data Claude Code already stores (`~/.claude/`) and cross-references it with `git log` to answer:
AI coding sessions can cost $5-$200+. You have no idea where that goes. burnlog reads the data your AI coding assistant already stores and cross-references it with `git log` to answer:

- Which project eats the most budget?
- Did that $50 session actually produce commits?
- Am I stuck in retry loops burning tokens for nothing?
- What's my efficiency trend this week vs last?

## Supported providers

burnlog currently supports **Claude Code** (reads from `~/.claude/`). The architecture is designed to support additional AI coding assistants in the future:

- **Claude Code** — fully supported
- **Codex CLI** — planned
- **OpenCode** — planned
- **Amp** — planned

## Try it now

```bash
Expand Down Expand Up @@ -79,9 +88,18 @@ npm install -g burnlog
| `burnlog session <id>` | Deep dive: exchange log, waste signals, correlated commits |
| `burnlog waste` | Detect wasted spend with actionable suggestions |
| `burnlog branch feat/US-402` | Cost breakdown for a feature branch ($/commit, $/line) |
| `burnlog compare feat/US-402 fix/US-411` | Side-by-side efficiency comparison between branches |
| `burnlog branch feat/US-402 fix/US-411` | Side-by-side efficiency comparison between two branches |

All commands support `--period` (7d, 30d, 90d), `--project`, `-f json|csv|table`, and `--offline`.

All commands support `--period` (7d, 30d, 90d), `--project`, and `-f json|csv|table`.
## Dynamic pricing

burnlog fetches up-to-date model pricing from [LiteLLM](https://github.com/BerriAI/litellm) automatically and caches it for 24 hours. This means new models and price changes are picked up without updating burnlog itself.

```bash
burnlog report # auto-fetches pricing if cache expired
burnlog report --offline # uses bundled pricing (no network)
```

## What it detects

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4 changes: 2 additions & 2 deletions package.json
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{
"name": "burnlog",
"version": "0.2.1",
"version": "0.3.0",
"description": "Correlate AI coding assistant token usage with real development work",
"type": "module",
"bin": {
Expand All @@ -21,7 +21,7 @@
"node": ">=18.0.0"
},
"scripts": {
"build": "tsc -p tsconfig.build.json",
"build": "tsc -p tsconfig.build.json && cp -r src/data dist/",
"dev": "tsx src/index.ts",
"start": "node dist/index.js",
"test": "vitest run",
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4 changes: 4 additions & 0 deletions src/cli/formatters/index.ts
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// Barrel re-export: all formatters available from a single import
export * from "./visual.js";
export * from "./table.js";
export * from "./export.js";
256 changes: 30 additions & 226 deletions src/cli/formatters/table.ts
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Expand Up @@ -5,234 +5,38 @@ import { totalTokens } from "../../core/token-ledger.js";
import { getModelDisplayName } from "../../utils/pricing-tables.js";
import type { EfficiencyResult } from "../../core/efficiency-score.js";

// ── Visual Utilities ──────────────────────────────────────────────

const BAR_BLOCKS = [" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█"];
const SPARK_CHARS = ["▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"];

/**
* Render a horizontal bar chart from a 0–1 ratio.
* Uses 1/8-block Unicode characters for sub-character precision.
* Empty space uses a subtle dot character for a cleaner look.
*/
export function renderBar(ratio: number, maxWidth = 20): string {
const clamped = Math.max(0, Math.min(1, ratio));
const fullWidth = clamped * maxWidth;
const fullBlocks = Math.floor(fullWidth);
const remainder = fullWidth - fullBlocks;
const partialIndex = Math.round(remainder * 8);

let bar = BAR_BLOCKS[8].repeat(fullBlocks);
if (partialIndex > 0 && fullBlocks < maxWidth) {
bar += BAR_BLOCKS[partialIndex];
}
const empty = maxWidth - fullBlocks - (partialIndex > 0 ? 1 : 0);
bar += chalk.dim("─").repeat(Math.max(0, empty));
return bar;
}

/**
* Render a sparkline from an array of values.
* Maps each value to one of 8 vertical bar characters.
*/
export function renderSparkline(values: number[]): string {
if (values.length === 0) return "";
const max = Math.max(...values);
const min = Math.min(...values);
const range = max - min;

return values
.map((v) => {
if (range === 0) return SPARK_CHARS[3]; // mid-height if all equal
const normalized = (v - min) / range;
const idx = Math.min(7, Math.round(normalized * 7));
// Color gradient: green (low) → yellow (mid) → red (high)
const char = SPARK_CHARS[idx];
if (idx <= 2) return chalk.green(char);
if (idx <= 4) return chalk.yellow(char);
return chalk.red(char);
})
.join("");
}

/**
* Render the efficiency score with a colored bar gauge.
*/
export function renderScoreGauge(score: number, width = 20): string {
const ratio = score / 100;
const r = Math.round(255 * (1 - ratio));
const g = Math.round(255 * ratio);
const filled = Math.ceil(ratio * width);
const empty = width - filled;
const filledBar = BAR_BLOCKS[8].repeat(filled);
const emptyBar = "─".repeat(Math.max(0, empty));
return `${score}/100 ${chalk.rgb(r, g, 60)(filledBar)}${chalk.dim(emptyBar)}`;
}

// ── Formatting Helpers ────────────────────────────────────────────

export function formatCurrency(amount: number): string {
return `$${amount.toFixed(2)}`;
}

export function formatTokens(count: number): string {
if (count >= 1_000_000) return `${(count / 1_000_000).toFixed(1)}M`;
if (count >= 1_000) return `${(count / 1_000).toFixed(1)}K`;
return count.toString();
}

export function outcomeIcon(outcome: string): string {
switch (outcome) {
case "fully_achieved":
return chalk.green("●");
case "mostly_achieved":
return chalk.green("◐");
case "partially_achieved":
return chalk.yellow("◐");
case "not_achieved":
return chalk.red("○");
default:
return chalk.gray("◌");
}
}

/**
* Render an outcome distribution as a proportional bar + legend.
* Instead of N individual dots, shows a fixed-width stacked bar.
*/
export function renderOutcomeDistribution(sessions: Session[]): string {
const counts = { ok: 0, mostly: 0, partial: 0, fail: 0, unknown: 0 };
for (const s of sessions) {
switch (s.outcome) {
case "fully_achieved": counts.ok++; break;
case "mostly_achieved": counts.mostly++; break;
case "partially_achieved": counts.partial++; break;
case "not_achieved": counts.fail++; break;
default: counts.unknown++; break;
}
}

const total = sessions.length;
if (total === 0) return chalk.dim("no sessions");

// Build a fixed-width proportional bar (20 chars)
const barWidth = 20;
const segments: Array<{ count: number; color: (s: string) => string }> = [
{ count: counts.ok, color: chalk.green },
{ count: counts.mostly, color: chalk.greenBright },
{ count: counts.partial, color: chalk.yellow },
{ count: counts.fail, color: chalk.red },
{ count: counts.unknown, color: chalk.gray },
];

let bar = "";
let allocated = 0;
for (const seg of segments) {
if (seg.count === 0) continue;
const width = Math.max(1, Math.round((seg.count / total) * barWidth));
const clamped = Math.min(width, barWidth - allocated);
bar += seg.color("█".repeat(clamped));
allocated += clamped;
}
// Fill any remaining due to rounding
if (allocated < barWidth) {
bar += chalk.dim("─".repeat(barWidth - allocated));
}

const parts: string[] = [];
if (counts.ok > 0) parts.push(chalk.green(`${counts.ok} OK`));
if (counts.mostly > 0) parts.push(chalk.greenBright(`${counts.mostly} mostly`));
if (counts.partial > 0) parts.push(chalk.yellow(`${counts.partial} partial`));
if (counts.fail > 0) parts.push(chalk.red(`${counts.fail} fail`));
if (counts.unknown > 0) parts.push(chalk.gray(`${counts.unknown} unknown`));

return `${bar} ${parts.join(chalk.dim(" · "))}`;
}

function humanizeType(type: string): string {
return type.replace(/_/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
}

// Keep backward-compatible alias
// Re-export visual utilities for backward compatibility
export {
renderBar,
renderSparkline,
renderScoreGauge,
formatCurrency,
formatTokens,
outcomeIcon,
renderOutcomeDistribution,
humanizeType,
truncate,
cleanPromptForDisplay,
wrapIndented,
} from "./visual.js";

import {
renderBar,
renderSparkline,
renderScoreGauge,
formatCurrency,
formatTokens,
outcomeIcon,
renderOutcomeDistribution,
humanizeType,
truncate,
cleanPromptForDisplay,
wrapIndented,
} from "./visual.js";

// Keep backward-compatible alias used internally
const humanizeWasteType = humanizeType;

function truncate(text: string, max: number): string {
if (text.length <= max) return text;
return text.slice(0, max - 1) + "…";
}

function cleanPromptForDisplay(raw: string): string {
if (!raw || raw.length < 80) return raw;

let text = raw.replace(/<(bash-stdout|bash-stderr|task-notification|system-reminder|command-name|command-message|local-command-stdout)[^>]*>[\s\S]*?<\/\1>/gi, (_match, tag) => {
return chalk.dim(`[${tag} collapsed]`);
});

const lines = text.split("\n");
const result: string[] = [];
let noiseBuffer: string[] = [];

const isNoise = (line: string): boolean => {
const t = line.trim();
if (!t) return noiseBuffer.length > 0;
return (
/^[│├└┌┬┼─╰╭╮╯┐┤┴]+/.test(t) ||
/^\/Users\//.test(t) ||
/^-Users-/.test(t) ||
/^\s*sessions:\s*\d+/.test(t) ||
/^\s*last active:/.test(t) ||
/^(Error|Warning|note|hint|Traceback|×):?\s/.test(t) ||
/^\s{6,}/.test(line) ||
/^(Old|To|Done|Changes|Read more):?\s/.test(t) ||
/^\s*at\s+/.test(t) ||
/^\s*python3?\s/.test(t) ||
/^\s*source\s/.test(t) ||
/^\s*brew\s/.test(t) ||
/^\s*If you/.test(t)
);
};

const flushNoise = () => {
if (noiseBuffer.length > 3) {
result.push(chalk.dim(`[... ${noiseBuffer.length} lines of pasted output ...]`));
} else {
result.push(...noiseBuffer);
}
noiseBuffer = [];
};

for (const line of lines) {
if (isNoise(line)) {
noiseBuffer.push(line);
} else {
flushNoise();
result.push(line);
}
}
flushNoise();

return result.join("\n").trim();
}

function wrapIndented(text: string, indent: number): string {
const width = (process.stdout.columns || 100) - indent;
if (text.length <= width) return text;
const pad = " ".repeat(indent);
const words = text.split(" ");
const lines: string[] = [];
let current = "";
for (const word of words) {
if (current && (current.length + 1 + word.length) > width) {
lines.push(current);
current = word;
} else {
current = current ? current + " " + word : word;
}
}
if (current) lines.push(current);
return lines.join("\n" + pad);
}

// ── Report Renderers ──────────────────────────────────────────────

export function renderReportHeader(
Expand Down
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