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 skills/huangjia2019/claude-code-engineering/02-progressive-skillnpx skills add huangjia2019/claude-code-engineering --skill 02-progressive-skillgit clone --depth 1 https://github.com/huangjia2019/claude-code-engineeringWrote 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/skills/huangjia2019/claude-code-engineering/02-progressive-skill)<a href="https://agentmods.dev/skills/huangjia2019/claude-code-engineering/02-progressive-skill"><img src="https://agentmods.dev/badge/skills/huangjia2019/claude-code-engineering/02-progressive-skill.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 | $0.00037 | $0.00352 |
| Opus 5 | $0.00018 | $0.00176 |
| Sonnet 5 | $0.00007 | $0.00070 |
| Haiku 4.5 | $0.00004 | $0.00035 |
Grade A, and why
api-documenting 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 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.
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.
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.
What ships with it
18 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.
- .claude/skills/api-documenting/EXAMPLES.md 2.7 KB
- .claude/skills/api-documenting/PATTERNS.md 1.6 KB
- .claude/skills/api-documenting/scripts/detect_routes.py 4.3 KB runs code
- .claude/skills/api-documenting/scripts/validate_openapi.sh 1.7 KB runs code
- .claude/skills/api-documenting/SKILL.md 1.5 KB
- .claude/skills/api-documenting/STANDARDS.md 1.7 KB
- .claude/skills/api-documenting/templates/endpoint.md 873 B
- .claude/skills/api-documenting/templates/index.md 1004 B
- .claude/skills/api-documenting/templates/openapi.yaml 1.9 KB
- EXAMPLES.md 2.7 KB
- PATTERNS.md 1.6 KB
- README.md 2.9 KB
- scripts/detect_routes.py 4.3 KB runs code
- scripts/validate_openapi.sh 1.7 KB runs code
- STANDARDS.md 1.7 KB
- templates/endpoint.md 873 B
- templates/index.md 1004 B
- templates/openapi.yaml 1.9 KB
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 · 72 lines · 37 tokens per session scan A 1452f5de6644
api-documenting is a skill published in the GitHub repository huangjia2019/claude-code-engineering (1,096 stars, last pushed 1mo ago), with no licence file. It adds 37 tokens to every session and 352 once invoked, about $0.0002 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.
Other skills, from other repositories
clrun
Run and control interactive CLI sessions for AI agents. Handles TUI prompts (select lists, checkboxes, confirms), persistent shell state, and long-running processes. Use when you need to execute terminal commands, respond to interactive prompts, navigate scaffolding wizards like create-vue or create-vite, or manage…
artifact-deploy
One-click deploy a user's pre-built app/artifact into their OWN AWS account and get a global public HTTPS link (Vercel-like), with a default TTL and promote-to-persistent. Use when the user says "deploy this", "ship this demo", "give me a public link", "share this externally", or "deploy to AWS".
explain-for
Explain a topic, a piece of code, an error, or a design decision calibrated to one named audience — a 5-year-old, a 5th grader, a manager, a designer, a graduate student, a parent. Resolves who the explanation is for (from the request, or from what memory already records about that person), establishes the ground…
agent-initialization
Initialize an Agent's settings from a user requirement by writing AGENTS.md, setting identity metadata, and installing only needed Skills.
pr-integration-test
Design, implement, and validate Intelligent Terminal integration tests for a target pull request or regression. Use when asked to add PR integration tests, convert a bug fix into E2E coverage, prove existing behavior still works, map tests to the release checklist, or verify E2E reports mark checklist cases complete.
session-summaries
What the chat right-panel session summary shows, what it costs, and how to make a session summarize well. Load when the user asks about the session summary panel, why a summary looks wrong or empty, or how to turn it on.