Modern Web Guidance is a source repository for coding-agent skills that provide web-platform guidance, recommended practices, and browser compatibility information. It helps coding agents choose newer web APIs and patterns when generating web applications. The catalogue skills are the guidance produced and maintained by this project.
Borrowing it
Nothing to install: this file belongs to GoogleChrome/modern-web-guidance-src. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/GoogleChrome/modern-web-guidance-src/main/.agents/skills/coherence-auditor/SKILL.mdgit clone --depth 1 https://github.com/GoogleChrome/modern-web-guidance-srcWrote 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/googlechrome/modern-web-guidance-src/coherence-auditor)<a href="https://agentmods.dev/skills/googlechrome/modern-web-guidance-src/coherence-auditor"><img src="https://agentmods.dev/badge/skills/googlechrome/modern-web-guidance-src/coherence-auditor/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.
<a href="https://agentmods.dev/skills/googlechrome/modern-web-guidance-src/coherence-auditor"><img src="https://agentmods.dev/badge/skills/googlechrome/modern-web-guidance-src/coherence-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00044 | $0.00806 |
| Opus 5.5 | $0.00018 | $0.00322 |
| Sonnet 5.5 | $0.00009 | $0.00161 |
| Haiku 4.5 | $0.00004 | $0.00081 |
Grade A, and why
coherence-auditor 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 18d 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Document Coherence & Repository Auditor Skill
This skill allows you to run a comprehensive audit of the repository's documentation coherence, link integrity, and git status. It is designed to be run on-demand to catch broken links, out-of-sync mappings, untracked clutter, and unresolved TODOs.
Workflow Instructions
- Spawn the
document-coherence-auditorSubagent: Define and invoke the subagent usingdefine_subagentandinvoke_subagent.
Subagent Definition:
-
Name:
document-coherence-auditor -
Description: Audits documentation coherence, link integrity, and git working-tree health.
-
System Prompt: You are a meticulous Document Coherence, Quality, and Git Repository Auditor subagent for this project.
When invoked, you will run the audit script to check the state of the workspace and documentation.
You should run the following command to execute the audit:
node .agents/skills/coherence-auditor/scripts/coherence-audit.tsThis script performs the following checks:
- Git State Check: Verifies if the working tree is clean and warns if you are working directly on the
mainbranch. - Root Clutter Check: Identifies untracked or non-canonical markdown files in the root directory that should be cleaned up.
- Link Integrity Check: Scans all markdown files (excluding
dist/andnode_modules/) and verifies that all relative markdown links point to existing files. - TODO/TBD Scan: Scans canonical docs and source guides for
TODO,TBD,FIXME, or other unresolved markers. - Skills Configuration Check: Warns if any skill in
skills-src/is not configured insrc/core/skills-config.ts. - Coherence between docs/CONTEXT.md and Project Skills: Lists
docs/CONTEXT.mdand allproject-*prefixed skills in.agents/skills/to prompt a semantic coherence check. - Guides Integrity Check: Runs the automated test suite
src/authoring/guides-integrity.test.tsto validate guide frontmatter, markdown soundness, and macro usage.
- Git State Check: Verifies if the working tree is clean and warns if you are working directly on the
What ships with it
1 file 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.
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.
- 18d ago Changed · -2 lines 5cbde93c8600
- 1mo ago First seen · 57 lines · 44 tokens per session scan A 2574eecf8a5a
coherence-auditor is a skill published in the GitHub repository GoogleChrome/modern-web-guidance-src (1,202 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 806 once invoked, about $0.0002 per session on Opus 5.5. 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
merge-batch
Prepare and merge an owner-selected PR batch with contributor credit and exact-candidate admission. Use for a pasted PR list; combined focused validation is diagnostic, and every actual landing still requires its applicable checks and authorization.
prowler-commit
Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.
gh-auth-isolation
Safely manage multiple GitHub identities (EMU + personal) in agent workflows.
comet-github
A routing guide for Comet-related GitHub work. It directs requests about pull requests, issues, CI failures, ideas, and fixes to the appropriate review or implementation process.
github-skill
Work with GitHub via the gh CLI — clone repositories, create/list/merge pull requests, create/list issues, and run any other gh command (API calls, workflow runs, releases, repo administration). List operations return parsed JSON.
release-helper
Ensures configuration and code changes are released correctly. Use PROACTIVELY whenever you edit config.json, change any setting, or fix a configuration bug in this project, so the change reaches production.