context-budget 0.1.0

Claude Code context window budget calculator — know your token cost before you load

context-budget

Know your token cost before you load.

A CLI tool for Claude Code users. Counts the token cost of files in your workspace so you can make informed decisions about what to load in a session — before you hit the context wall.

The Problem

Claude Code has a ~200K token context window. Your system prompt + tools already consume ~80K. Every file you load eats into the remaining ~120K. Load too much = early compaction = shorter, less useful sessions.

But you don't know the cost until it's too late.

The Solution

# See what's eating your context budget
python3 context_budget.py scan ./my-workspace

# Check the exact cost of files you're about to load
python3 context_budget.py check CLAUDE.md M-memory/SESSION-BRIEF.md A-agents/jams-agent.md

# Validate your tiered loading strategy (reads CLAUDE.md tier definitions)
python3 context_budget.py tier ./my-workspace

Install

pip install tiktoken
# That's it — single file, no other dependencies

Example Output

--- Token Scan Results for './M-memory' ---
Budget: 50,000 tokens | Claude Max Context: 200,000 tokens
───────────────────────────────────────────────────────────
  15,134 tokens  (30.3% budget) (7.6% window)  learning-log-archive.md
   9,080 tokens  (18.2% budget) (4.5% window)  vision-backlog.md
   2,793 tokens   (5.6% budget) (1.4% window)  decisions.md
   1,656 tokens   (3.3% budget) (0.8% window)  SESSION-BRIEF.md
───────────────────────────────────────────────────────────
Total: 40,271 tokens (80.5% of budget) — ⚠️ NEAR LIMIT

Insight: Loading learning-log-archive.md alone costs 7.6% of the full window. SESSION-BRIEF (0.8%) gives you 90% of the value at 10% of the cost. That's why tiered loading works.

Commands

Command	What it does
scan PATH	Recursively lists all files sorted by token count
check FILE1 FILE2...	Sums up token costs for specific files
tier PATH	Reads CLAUDE.md, maps files to their loading tier

Options

Flag	Default	Description
--budget N	50000	Token budget to compare against
--format json	text	Output as JSON for scripting

Use Cases

• Before a session: Run scan to identify which files are most expensive
• Planning a CLAUDE.md: Use check to validate that your Tier 1 files stay under budget
• Debugging slow sessions: Find which files are causing context bloat
• Tiered loading audits: Use tier to confirm your loading strategy is cost-efficient

Built by

Harel Asaf · 2026-05-26