Chromium is an open-source web browser project and the official GitHub mirror of its source code. It is used to build and maintain software for browsing the web, with documentation and code for products such as Chrome and Android WebView.
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 skills add chromium/chromium --skill lint-syncgit clone --depth 1 https://github.com/chromium/chromiumWrote 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/chromium/chromium/lint-sync)<a href="https://agentmods.dev/skills/chromium/chromium/lint-sync"><img src="https://agentmods.dev/badge/skills/chromium/chromium/lint-sync/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/chromium/chromium/lint-sync"><img src="https://agentmods.dev/badge/skills/chromium/chromium/lint-sync.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 | $0.00053 | $0.01637 |
| Opus 5.5 | $0.00021 | $0.00655 |
| Sonnet 5.5 | $0.00011 | $0.00327 |
| Haiku 4.5 | $0.00005 | $0.00164 |
Grade A, and why
lint-sync 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 2mo 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 — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Code Health: Lint Sync Guards
Identify enums in the codebase that are persisted to logs (e.g., recorded in
enums.xml) but are missing the LINT.IfChange(...) and LINT.ThenChange(...)
guards that enforce synchronization between the source code and the XML
metadata.
Overview
When developers modify an enum in C++ or Java but forget to update the
corresponding entry in enums.xml, it breaks downstream metrics pipelines.
Adding IfThisThenThat lint guards prevents this by generating Gerrit warnings
if one side is modified without the other. Act as an expert Chromium contributor
to add these missing guards.
Goal: Add LINT.IfChange/ThenChange sync guards to enums in C++/Java and XML files to enforce synchronization.
Relevant Resources & Style Guides
- Chromium IfThisThenThat (IFTTT) Guides
- Discovery Script: find_candidates.py
- Implementation Patterns: patterns.md (Syntax rules and examples)
- Automated Review Protocol: automated_review.md
Workflow
[!IMPORTANT] Execution Protocol: Execute all steps sequentially one by one. Do not skip any step. Do not use
edit-codeorgrep. Userg(ripgrep) for searches.
Step 1: Workspace Preparation
Follow the workspace preparation steps in workspace_preparation.md to ensure a clean and updated environment.
Step 2: Discovery & Batch Selection
Follow the Discovery & Batch Selection workflow.
Step 3: Refactoring & Implementation
Process the candidates by handling them one file at a time, and applying modifications inside each file one enum at a time (rather than refactoring all files or enums at once). This ensures stability and allows for precise verification. Refer to patterns.md for sync guard syntax rules and examples before making replacements.
What ships with it
3 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.
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.
- 2mo ago First seen · 142 lines · 53 tokens per session scan A 2a2dfdbdab3b
lint-sync is a skill published in the GitHub repository chromium/chromium (25,174 stars, last pushed today), licensed BSD-3-Clause. It adds 53 tokens to every session and 1,637 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.
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