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feat(react): React introspection, Web Vitals, and SPA primitives (#1257)

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* feat(react): first-class React introspection, Web Vitals, and nextjs skill

Add React-general and web-universal features as first-class agent-browser verbs
(react tree/inspect/renders/suspense, vitals, pushstate). Genuinely Next.js-specific
workflows (PPR cookie protocol, /_next/mcp bridge, dev-server endpoints) ship as
a new `nextjs` skill that composes the primitives. No new runtime dependencies -
the React DevTools installHook.js is vendored (MIT) and include_str!'d into the
binary.

New commands:
  react tree                  Full React component tree (depth id parent name)
  react inspect <fiberId>     Props, hooks, state, source for one fiber
  react renders start|stop    Fiber profiler with Insts/Mounts/Re-renders/Self/DOM
                              + prev->next change details
  react suspense              Suspense boundaries + classifier (client-hook,
                              request-api, server-fetch, cache, stream, framework)
                              + root-cause grouping + recommendations
  vitals [url]                LCP/CLS/TTFB/FCP/INP + React hydration phases
  pushstate <url>             Generic SPA client-side navigation
  removeinitscript <id>       Remove a script registered via addinitscript

New launch flags:
  --init-script <path>        Register init scripts before first navigation
                              (repeatable; env AGENT_BROWSER_INIT_SCRIPTS)
  --enable <feature>          Built-in init scripts; currently react-devtools
                              (repeatable; env AGENT_BROWSER_ENABLE)

Other primitives:
  network route ... --resource-type <csv>  Filter by CDP resource type
  cookies set --curl <file>                Auto-detects JSON/cURL/Cookie-header

* fixes

* fixes

* fixes
This commit is contained in:
Chris Tate
2026-04-20 16:12:47 -05:00
committed by GitHub
parent cff12598bf
commit 57405f9361
22 changed files with 3438 additions and 18 deletions
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cli/src/native/react/mod.rs
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//! React/web introspection primitives.
//!
//! Scripts and handlers for the `react` subcommands (tree, inspect, renders,
//! suspense) plus the universal `vitals` verb and the generic `pushstate`
//! SPA-navigation action. These primitives are framework-agnostic: React-side
//! commands only require the `__REACT_DEVTOOLS_GLOBAL_HOOK__` to be installed,
//! and `vitals` / `pushstate` are pure web-standard APIs.
//!
//! The React DevTools `installHook.js` is vendored from the React DevTools
//! Chrome extension (MIT, facebook/react). It's registered via
//! `addScriptToEvaluateOnNewDocument` before any page JS runs when the user
//! passes `--enable react-devtools` at launch.
pub mod scripts;
mod renders;
mod suspense;
mod tree;
mod vitals;
pub use renders::{format_renders_report, RendersData};
pub use suspense::{format_suspense_report, Boundary};
pub use tree::{format_tree, TreeNode};
pub use vitals::{format_vitals_report, VitalsData};
/// React DevTools hook script (MIT, from facebook/react).
/// Registered via `addScriptToEvaluateOnNewDocument` to install
/// `window.__REACT_DEVTOOLS_GLOBAL_HOOK__` before any page JS runs. React
/// detects the hook on boot and registers its renderers against it, which
/// enables every `react …` command.
pub const INSTALL_HOOK_JS: &str = include_str!("installHook.js");