context-budget

context-budget is a skill for Claude Code, Codex from nklofy/code-agent-skills. It costs 37 tokens per session (1,310 once invoked), scanned A, a copy of context-budget, Apache-2.0.

A diagnostic skill that estimates how much of Claude Code's context window is used by agents, skills, rules, and connected tool servers. The context window is the amount of project information the assistant can consider during a session.

In plain words
What is it for?
Use it to inventory loaded components, estimate token usage, find large or repeated instructions, check MCP server overhead, and produce prioritized context-saving recommendations.
Why use it?
It helps explain sluggish sessions, weaker answers, or limited room for adding more components. It identifies oversized files, duplicate skills, bloated descriptions, and overlapping rules, then ranks possible reductions.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nklofy/code-agent-skills/context-budget
Any agent
npx skills add nklofy/code-agent-skills --skill context-budget
Clone the repo
git clone --depth 1 https://github.com/nklofy/code-agent-skills

Made for: Claude Code, Codex.

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.

agentmods badge for context-budget

README.md
[![agentmods](https://agentmods.dev/badge/skills/nklofy/code-agent-skills/context-budget.svg)](https://agentmods.dev/skills/nklofy/code-agent-skills/context-budget)
Your own site
<a href="https://agentmods.dev/skills/nklofy/code-agent-skills/context-budget"><img src="https://agentmods.dev/badge/skills/nklofy/code-agent-skills/context-budget.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 91% copy Near-identical to another mod 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.

ModelPer sessionOnce invoked
Fable 5 $0.00037 $0.01310
Opus 5 $0.00018 $0.00655
Sonnet 5 $0.00007 $0.00262
Haiku 4.5 $0.00004 $0.00131

Measured 5d ago against content hash 755adb765d26, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

context-budget 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 5d 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.

Origin

This is a copy

91% identical to context-budget — 28 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

affaan-m-ECC/context-budget/SKILL.md · 137 lines

How it starts

The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context Budget

Analyze token overhead across every loaded component in a Claude Code session and surface actionable optimizations to reclaim context space.

When to Use

  • Session performance feels sluggish or output quality is degrading
  • You've recently added many skills, agents, or MCP servers
  • You want to know how much context headroom you actually have
  • Planning to add more components and need to know if there's room
  • Running /context-budget command (this skill backs it)

How It Works

Phase 1: Inventory

Scan all component directories and estimate token consumption:

Agents (agents/*.md)

  • Count lines and tokens per file (words × 1.3)
  • Extract description frontmatter length
  • Flag: files >200 lines (heavy), description >30 words (bloated frontmatter)

Skills (skills/*/SKILL.md)

  • Count tokens per SKILL.md
  • Flag: files >400 lines
  • Check for duplicate copies in .agents/skills/ — skip identical copies to avoid double-counting

Rules (rules/**/*.md)

  • Count tokens per file
  • Flag: files >100 lines
  • Detect content overlap between rule files in the same language module

MCP Servers (.mcp.json or active MCP config)

  • Count configured servers and total tool count
  • Estimate schema overhead at ~500 tokens per tool
  • Flag: servers with >20 tools, servers that wrap simple CLI commands (gh, git, npm, supabase, vercel)

CLAUDE.md (project + user-level)

  • Count tokens per file in the CLAUDE.md chain
  • Flag: combined total >300 lines

Phase 2: Classify

Sort every component into a bucket:

Bucket Criteria Action
Always needed Referenced in CLAUDE.md, backs an active command, or matches current project type Keep
Sometimes needed Domain-specific (e.g. language patterns), not referenced in CLAUDE.md Consider on-demand activation
Rarely needed No command reference, overlapping content, or no obvious project match Remove or lazy-load

Phase 3: Detect Issues

Read the full file on GitHub · 137 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.

  1. 5d ago First seen · 137 lines · 37 tokens per session scan A 755adb765d26

Subscribe to this mod's changes

context-budget is a skill published in the GitHub repository nklofy/code-agent-skills (18 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 37 tokens to every session and 1,310 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to context-budget, differing in 28 lines, and is treated as a copy.

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