Skill Claude Code needs its repo
Modularize a chrome/browser/ subfolder by splitting its sources out of the monolithic //chrome/browser:browser target into dedicated sourceset targets in the subfolder's own BUILD.gn. Use when the user asks to modularize, extract, or create BUILD targets for a chrome/browser/ subfolder, or mentions "Project Bedrock"…
Skill Claude CodeCodex
Researcher for converting unit tests to browser tests for Project Bedrock. Invoke this when the user needs to understand the current codebase behavior while removing complex Browser dependencies from tests.
Skill Claude CodeCodex
Reviewer for converting unit tests to browser tests for Project Bedrock. Invoke this when the user needs to review their work while removing complex Browser dependencies from tests.
Skill Claude CodeCodex
Workflow for converting unit tests to browser tests for Project Bedrock. Invoke this when the user wants to remove complex Browser dependencies from tests.
Skill Claude CodeCodex
Critique and review Figma designs to ensure alignment with Chromium codebase components, tokens, and structure. Use when the user asks to critique, review, or audit a design, check alignment with code, or compare a Figma node against component specifications or coding standards.
Skill Claude CodeCodex
Recreate Figma design frames as prototype-ready Chromium Views JSON script following Chrome's native Views architecture, component guidelines, and color/shape token mappings. Use when asked to create C++ Views Prototype JSON script from a Figma frame URL.
Skill Claude CodeCodex
Recreate Figma design frames as production-ready Chromium C++ Views code following Chrome's native Views architecture, component guidelines, and color/shape token mappings. Use when asked to create C++ Views code from a Figma frame URL.
Skill Claude CodeCodex
Recreate Figma design frames as production-level Chromium WebUI code following Chrome's Lit-element architecture and styling guidelines. Use when asked to create WebUI code from a Figma frame URL.
Skill Claude CodeCodex
Finds common violations of the Android accessibility API in the Clank App Java code and attempts to address them (e.g. hardcoded state change announcements, missing events, focus moving, assertive live regions, etc).
Skill Claude CodeCodex
Identify and safely remove expired Chromium histograms (dead metrics/technical debt). Use this skill when a contributor asks to clean up metrics, fix code health issues related to histograms, remove obsolete code, or work on a histogram cleanup task.
Skill Claude CodeCodex
Extension pipeline to bump expiration dates of Chromium UMA histograms.
Skill Claude CodeCodex
Orchestrator for the "Code Health Hub" framework. Trigger only when the user refers to the Hub or asks to see "available cleanup tasks" within the Chromium technical debt reduction system.
Skill Claude CodeCodex
Identify and clean up inline fully qualified Java names (FQNs) in first-party code, replacing them with standard imports.
Skill Claude CodeCodex
Automatically detects misordered lists in code (like Android XMLs), injects go/keep-sorted tags, sorts them, and creates CLs.
Skill Claude CodeCodex
Add missing LINT.IfChange(...) / LINT.ThenChange(...) guards to enums in C++/Java and XML to keep them in sync. Trigger this skill ONLY when a contributor explicitly asks to add lint guards or synchronize enums using LINT guards.
Skill Claude CodeCodex
Replace anonymous classes with lambdas where applicable (SAM interfaces).
Skill Claude CodeCodex needs its repo
Find and fix unsafe buffer operations in a C++ file by removing UNSAFETODO markers and replacing unsafe raw pointers/C-style functions with base::span and standard safe containers. Use when the user asks to fix unsafe buffer warnings or -Wunsafe-buffer-usage errors. Don't use for other types of memory safety bugs like…
Skill Claude CodeCodex
Extracts raw trace data from Perfetto traces, runs arbitrary SQL queries for custom follow-up analysis, and applies expert cognitive principles (Tiered Flow Analysis, Semantic Mismatch, Redundancy) to identify performance bottlenecks, structural redundancies, and tracer gaps. Use when you need to analyze a trace under…
Skill Claude CodeCodex needs its repo
Guide for auditing and applying batching annotations (@Batch) and AutoReset rules (AutoResetCtaTransitTestRule) to Android javatests in Chromium. Use this skill when optimizing Java instrumentation test runtimes, resolving test state leaks, or migrating tests to batched execution.
Skill Claude CodeCodex
Guide for writing and converting Chromium Android unit tests across host Robolectric (chromejunittests) and on-device (chromepublicunittestapk) suites.
Skill Claude CodeCodex
Automates applying a bug fix from a bug report containing a diff and CL description. Supports processing multiple bugs in parallel using subagents.
Skill Claude CodeCodex needs its repo
Automated Tracing & Performance Telemetry in Chromium using Perfetto and Telemetry benchmarks. Use when you need to launch the browser binary, execute a specific scenario/story, and collect Perfetto traces. Don't use for trace analysis (use analyzing-sql-traces).
Skill Claude CodeCodex
Bisect regressions or broken builds in the Chromium repository using deterministic binary search, checking out midpoint commits, syncing dependencies with gclient sync, compiling the target with autoninja, and querying the user for test results until the culprit commit is isolated.
Skill Claude CodeCodex
Refactor Chrome desktop Browser-scoped logic, such as Browser and BrowserWindow methods and state, into encapsulated feature controllers owned by BrowserWindowFeatures.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: