context-optimization

context-optimization is a skill for Claude Code, Codex from sheng3233836/vibe-coding-standards. It costs 57 tokens per session (1,560 once invoked), scanned A, original, no licence file.

A guide for using an AI assistant's context—the information it keeps available during a task—more efficiently.

In plain words
What is it for?
It is for reducing context use, planning context budgets, masking old observations, splitting context, and applying key-value cache optimisation.
Why use it?
It helps when context limits or token costs make long tasks harder to run or more expensive.

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/sheng3233836/vibe-coding-standards/context-optimization
Any agent
npx skills add sheng3233836/vibe-coding-standards --skill context-optimization
Clone the repo
git clone --depth 1 https://github.com/sheng3233836/vibe-coding-standards

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-optimization

README.md
[![agentmods](https://agentmods.dev/badge/skills/sheng3233836/vibe-coding-standards/context-optimization.svg)](https://agentmods.dev/skills/sheng3233836/vibe-coding-standards/context-optimization)
Your own site
<a href="https://agentmods.dev/skills/sheng3233836/vibe-coding-standards/context-optimization"><img src="https://agentmods.dev/badge/skills/sheng3233836/vibe-coding-standards/context-optimization.svg" alt="Measured on agentmods" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,560 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5 $0.00057 $0.01560
Opus 5 $0.00028 $0.00780
Sonnet 5 $0.00011 $0.00312
Haiku 4.5 $0.00006 $0.00156

Measured 3d ago against content hash 11cde65d1586, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

context-optimization 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/compaction.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/context-optimization/SKILL.md · 180 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 180 lines · 57 tokens per session scan A 11cde65d1586

Subscribe to this mod's changes

context-optimization is a skill published in the GitHub repository sheng3233836/vibe-coding-standards (2 stars, last pushed 5mo ago), with no licence file. It adds 57 tokens to every session and 1,560 once invoked, about $0.0003 per session on Opus 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.

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