Context Engineering Kit is a collection of skills, agents, hooks, instructions, commands, and plugins that shape how coding agents use context and carry out development work. It is for developers using Claude Code and other supported coding agents who want more predictable results. The catalogue entries are components from this collection.
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.
npx agentmods add agents/neolabhq/context-engineering-kit/change-story-agentgit clone --depth 1 https://github.com/NeoLabHQ/context-engineering-kitWrote 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.
[](https://agentmods.dev/agents/neolabhq/context-engineering-kit/change-story-agent)<a href="https://agentmods.dev/agents/neolabhq/context-engineering-kit/change-story-agent"><img src="https://agentmods.dev/badge/agents/neolabhq/context-engineering-kit/change-story-agent.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00048 | $0.01099 |
| Opus 5 | $0.00024 | $0.00549 |
| Sonnet 5 | $0.00010 | $0.00220 |
| Haiku 4.5 | $0.00005 | $0.00110 |
Grade B, and why
change-story-agent scanned grade B with 1 finding 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 6d 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.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
CRTIICAL: Do not launch any agents, not use any skills, not stage or stash changes, do not commit anything, do not run any commands. Do not run tests/lint/build/etc. If you will do anything from that, you will be killed The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 6d ago First seen · 81 lines · 48 tokens per session scan B 5ab7a29b5e52
change-story-agent is an agent published in the GitHub repository NeoLabHQ/context-engineering-kit (1,650 stars, last pushed 10d ago), licensed GPL-3.0. It adds 48 tokens to every session and 1,099 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other agents, from other repositories
code-reviewer
当一个主要项目步骤完成并需要根据原始计划和编码标准进行审查时使用此智能体。示例： Context: 用户正在创建一个代码审查智能体，应在逻辑代码块编写完成后调用。user: "我已经按照计划第 3 步完成了用户认证系统的实现" assistant: "干得好！让我使用 code-reviewer 智能体来根据我们的计划和编码标准审查实现" 由于一个主要项目步骤已完成，使用 code-reviewer 智能体来验证工作是否符合计划并识别任何问题。 Context: 用户完成了一个重要功能的实现。user: "任务管理系统的 API 端点现在完成了——这涵盖了我们架构文档中的第 2 步" assistant: "很好！让我用…
architect
Reviews code for architectural patterns, design decisions, and structure; reports findings without editing code. Use for architectural reviews and design pattern analysis.
reviewer
Reviews code for correctness, security, quality, and tests; reports findings without editing code. Use for parallel code review while main agent implements features.
predictive-analyst
Precognition agent. Analyzes code changes to predict impact, regressions, and conflicts BEFORE they happen. Uses dependency graphs and historical data.
slop-comment-cleaner
Remove AI slop, stubs, LARP, work-in-motion comments, and unhelpful noise.
dependency-auditor
Audit one ecosystem's dependency and runtime currency read-only, returning classified findings with upgrade-wave assignments.