What is tokburn CLAUDE.md?

A set of Claude Code instructions for the lsvishaal/tokburn codebase. It documents project files, commands, testing, dependency installation, and architecture.

Use it when working on tokburn to understand its claude.md file, run one test, install dependencies, and follow its architecture.

It gives the coding agent repository-specific rules and commands instead of relying on guesswork.

How lsvishaal/tokburn configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lsvishaal/tokburn. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/lsvishaal/tokburn/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/lsvishaal/tokburn

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/lsvishaal/tokburn/claude-md/github.svg)](https://agentmods.dev/instructions/lsvishaal/tokburn/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/lsvishaal/tokburn/claude-md"><img src="https://agentmods.dev/badge/instructions/lsvishaal/tokburn/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/lsvishaal/tokburn/claude-md"><img src="https://agentmods.dev/badge/instructions/lsvishaal/tokburn/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 900 This file is loaded in full into every session.

When invoked 900 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00900	$0.00900
Opus 5.5	$0.00360	$0.00360
Sonnet 5.5	$0.00180	$0.00180
Haiku 4.5	$0.00090	$0.00090

Measured 2mo ago against content hash 6660a4b904ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tokburn CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Commands

make test          # Run full test suite
make lint          # Check style (ruff check + format --check)
make fix           # Auto-fix lint/format issues
make dev           # Start server in foreground (verbose, Ctrl+C to stop)
make serve         # Start server in background on port 8391
make stop          # Stop the background server
make scan          # CLI scan of sessions without starting the server

# Run a single test
uv run pytest tests/test_core.py::test_calculate_cost_known_model -v

# Install deps
uv sync --dev

Architecture

TokBurn is a local analytics dashboard that reads AI coding agent session logs, calculates costs, and surfaces waste-detection insights. It never phones home — all data is read from disk at ~/.claude/projects/.

Data flow

~/.claude/projects/<encoded-path>/<session-id>.jsonl
        ↓
ClaudeCodeParser   (parsers/claude_code.py)
  discover_sessions() → list of JSONL paths
  parse_session()     → Session dataclass
        ↓
Session / Message / ToolCall  (parsers/base.py)
  — token counts, tool calls, timestamps
        ↓
calculate_cost()  (cost.py)
  — applies MODEL_PRICING / CACHE_PRICING tables
        ↓
analyze_sessions()  (analyzer.py)
  — emits Insight objects (repeated_reads, floundering, cost_outlier, long_session)
        ↓
FastAPI server  (server.py)
  — 30s in-memory cache; REST endpoints feed the dashboard

Key design details

Parser (parsers/claude_code.py) — Claude Code embeds token usage in two layouts depending on version: record.usage (newer) and record.message.usage (older). The parser checks both. Session files live under ~/.claude/projects/<encoded-cwd>/ in three possible layouts: <session>.jsonl, sessions/<session>.jsonl, and <session>/subagents/<agent>.jsonl. Project paths are encoded by replacing / with -; _decode_project_path() reverses this.

Read the full file on GitHub · 74 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 74 lines · 900 tokens per session scan A 6660a4b904ec

Subscribe to this mod's changes

tokburn CLAUDE.md is an instructions file published in the GitHub repository lsvishaal/tokburn (10 stars, last pushed 2mo ago), licensed MIT. It adds 900 tokens to every session, about $0.0036 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

tokburn CLAUDE.md next to 6 instructions from other repositories
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tokburn CLAUDE.mdlsvishaal/tokburn	Instructions file	10	2mo ago	MIT	A	900	Claude Code
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

tokburn: Instructions file for Claude Code