What is html-spec-review?

A set of guidelines for writing and reviewing the HTML standard, the document that defines how HTML works. It covers style, formatting, prose correctness, and notes written for developers.

Use it when drafting or reviewing HTML-standard text and developer-edition annotations.

It helps keep changes to the standard consistent, readable, and correctly annotated. Without it, wording and formatting rules can be applied unevenly.

html-spec-review — Skill for Claude Code and Codex by noamr

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.

Any agent

npx skills add noamr/web-archeologist --skill html-spec-review

Clone the repo

git clone --depth 1 https://github.com/noamr/web-archeologist

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/noamr/web-archeologist/html-spec-review/github.svg)](https://agentmods.dev/skills/noamr/web-archeologist/html-spec-review)

Your own site

<a href="https://agentmods.dev/skills/noamr/web-archeologist/html-spec-review"><img src="https://agentmods.dev/badge/skills/noamr/web-archeologist/html-spec-review/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/noamr/web-archeologist/html-spec-review"><img src="https://agentmods.dev/badge/skills/noamr/web-archeologist/html-spec-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 12,631 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.12631
Opus 5.5	$0.00000	$0.05052
Sonnet 5.5	$0.00000	$0.02526
Haiku 4.5	$0.00000	$0.01263

Measured 24d ago against content hash 53c4379e19de, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

html-spec-review 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 24d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/__init__.py, scripts/check_algorithms.py, scripts/check_webidl.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/html-spec-review/SKILL.md · 601 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

4 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.

24d ago Changed · +9 lines 53c4379e19de
28d ago Changed · +7 lines fc7c6bafe9db
29d ago Changed · +3 lines · -46 tokens per session e3dba924c8ea
2mo ago Changed · +416 lines · +16 tokens per session 0adab87d8777
2mo ago First seen · 166 lines · 30 tokens per session scan A e636d0b8f3a2

Subscribe to this mod's changes

html-spec-review is a skill published in the GitHub repository noamr/web-archeologist (18 stars, last pushed 24d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 12,631 tokens. 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.

Writing and docs

html-spec-review next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
html-spec-reviewnoamr/web-archeologist	Skill	18	24d ago	none	A	0	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code