pitfalls

pitfalls is a skill for Claude Code, Codex from iyuenan3/worklog-kit. It costs 127 tokens per session (2,080 once invoked), scanned A, original, Apache-2.0.

A layered library of engineering pitfalls, with optional read-only automatic context loading. It covers reusable problems across projects and project-specific lessons.

In plain words
What is it for?
Use it to look up relevant pitfalls before risky engineering tasks, maintain shared lessons, or configure automatic read-only loading of matching guidance.
Why use it?
It helps you check known risks before working on areas such as shell commands, Git history, regular expressions, DNS, Docker, large files, or processes.

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/iyuenan3/worklog-kit/pitfalls
Any agent
npx skills add iyuenan3/worklog-kit --skill pitfalls
Clone the repo
git clone --depth 1 https://github.com/iyuenan3/worklog-kit

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 pitfalls

README.md
[![agentmods](https://agentmods.dev/badge/skills/iyuenan3/worklog-kit/pitfalls.svg)](https://agentmods.dev/skills/iyuenan3/worklog-kit/pitfalls)
Your own site
<a href="https://agentmods.dev/skills/iyuenan3/worklog-kit/pitfalls"><img src="https://agentmods.dev/badge/skills/iyuenan3/worklog-kit/pitfalls.svg" alt="Measured on agentmods" height="20"></a>
Per session 127 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,080 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00127 $0.02080
Opus 5 $0.00063 $0.01040
Sonnet 5 $0.00025 $0.00416
Haiku 4.5 $0.00013 $0.00208

Measured 4d ago against content hash 15dd7dae8339, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

pitfalls 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 4d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/codex-memory-context.py, scripts/init-private-library.sh, scripts/install-codex-hook.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.

.agents/skills/pitfalls/SKILL.md · 138 lines

How it starts

The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.

pitfalls:分层工程踩坑库

同一个坑,不该让不同项目各踩一遍。

Skill 代码与可变记忆分离:

  • 公共基线随 Skill 发布,只放已验证、已脱敏、对其他用户也有价值的通用坑。
  • 私人跨项目坑库存放在 ~/.local/share/pitfalls-memory/LIBRARY.md,是默认晋级目标。
  • 证据不足或已经退役的观察保存在 references/HISTORY.md,不参与默认检索和 Hook 注入。
  • 单项目坑留在该项目的专用 memory,或由 $stash 管理。
  • Agent 自动 memory 只作低优先级提示,不是真相源。

核心纪律:渐进披露

高风险工程任务开始前,运行:

bash ~/.agents/skills/pitfalls/scripts/resolve-libraries.sh

它按顺序返回:

  1. Skill 自带的公共基线 references/LIBRARY.md
  2. 私人 pitfalls-memory/LIBRARY.md,不存在时跳过。

只读取与当前任务对应的 ## 章节,不全量加载整座库。随后按需读取项目 memory;只有这些策展来源仍不足时,才使用当前客户端已经提供或可以检索的 Agent memory。不要主动全量扫描 Agent 的内部 memory 目录。

Codex 的全局 always-on 纪律放在 ~/.codex/AGENTS.md。Claude Code 在 ~/.claude/CLAUDE.md 保留语义一致的规则。Skill description 只是触发线索,不能替代全局纪律。

Codex 自动上下文(可选)

Codex 支持在 UserPromptSubmit 阶段追加上下文。安装本 Skill 后,可让每条用户消息自动经过同一套分层检索:

python3 ~/.agents/skills/pitfalls/scripts/install-codex-hook.py --install
python3 ~/.agents/skills/pitfalls/scripts/install-codex-hook.py --check

安装器只合并 ~/.codex/hooks.json,保留其他 Hook;修改已有文件前创建北京时间戳备份。安装后重启 Codex,并用 /hooks 审阅和信任命令。

自动加载器遵守四条边界:

  1. 只读、失败放行,不初始化目录、不迁移旧记忆、不修改任何库。
  2. 公共和私人坑库只注入与当前 prompt 相关的 ### 条目。
  3. 项目 memory 只注入 MEMORY.md 相关索引行与 topic 的 frontmatter description,正文按项目 memory Skill 再读,避免自动带入凭证等私密正文。
  4. 自动上下文有长度上限,并明确标注为可能过时的策展证据,不覆盖用户当前指令和真实系统证据。

Hook 是 Codex 专属增强。Claude Code 继续通过本 Skill 的手动分层检索使用同一套公共、私人和项目记忆。

高危域:

典型动作
Agent 工具与运行环境 编辑大文件、解释工具返回值、处理沙箱或 harness 差异
Bash / Shell 写脚本、heredoc、管道、依赖 grep 或 lsof 等命令的退出码
macOS 特有 grep 或 sed 处理中文、校验脚本、Python 包、目录判断
Python / 打包与运行时 venv、package-data、受限 cwd
Git 删除与修改混合提交、历史改写、批量 add、变异测试
部署 / 基础设施 HTTPS、Docker、反向代理、systemd、网络可达性
配置 / 凭证加载 .env、SDK 重试、长连接
验证 / 度量 A/B 基线、变异测试、假绿
进程 / 子进程 进程组、孙进程、优雅停机
文件同步 iCloud 或网盘同步开发目录

查不到对应坑不等于没有坑,只表示现有知识尚未覆盖。

查(默认动作)

  1. resolve-libraries.sh 取得公共基线与私人坑库。
  2. 在两份库中定位相关 ## 章节,核对触发条件、工具版本、OS、locale 和把握度。
  3. 检查当前 repo 的 AGENTS.md.agents/skills/。存在专用 memory Skill 时按其路由读取;否则运行 $stash 的 resolver,完整读 MEMORY.md 后只读相关条目。
  4. 策展来源仍不足时,才参考当前 Agent 提供的自动 memory,并把它视为可能过时的提示。
  5. 把可复用的“正确做法”落实到即将执行的命令、代码或验证策略中,再行动。

Read the full file on GitHub · 138 lines

Files

What ships with it

8 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. 4d ago First seen · 138 lines · 127 tokens per session scan A 15dd7dae8339

Subscribe to this mod's changes

pitfalls is a skill published in the GitHub repository iyuenan3/worklog-kit (11 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 127 tokens to every session and 2,080 once invoked, about $0.0006 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 2026-08-30.

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