eoka

Stealth browser automation in Rust. Passes bot detection without the bloat.

Requirements

Rust 1.85 or newer, and Chrome or Chromium installed. eoka launches and controls the browser via CDP.

Install

[dependencies]
eoka = "0.7"
tokio = { version = "1", features = ["rt-multi-thread", "macros"] }

Quick Start

use eoka::{ActionOptions, Browser, Expectation, LocatorSpec, Result};

#[tokio::main]
async fn main() -> Result<()> {
    let browser = Browser::launch().await?;
    let page = browser.new_page("data:text/html,<input id=name><button onclick=\"document.body.dataset.done=1\">Save</button>").await?;
    page.fill("#name", "hello").await?;
    let receipt = page.locator("button").click(ActionOptions::expecting(
        Expectation::Visible { target: LocatorSpec::css("body[data-done]") },
    )).await?;
    assert_eq!(receipt.outcome, eoka::ActionOutcome::VerifiedComplete);

    let png = page.screenshot().await?;
    std::fs::write("screenshot.png", png)?;

    browser.close().await?;
    Ok(())
}

Login Flow Example

use eoka::{ActionOptions, Browser, Expectation, LocatorSpec, Result};

#[tokio::main]
async fn main() -> Result<()> {
    let browser = Browser::launch().await?;
    let page = browser.new_page("https://example.com/login").await?;

    page.locator_text("Sign In").human_click(ActionOptions::expecting(
        Expectation::Visible { target: LocatorSpec::css("#email") },
    )).await?;
    page.wait_for_visible("#email", 10_000).await?;
    page.human_fill("#email", "user@example.com").await?;
    page.human_fill("#password", "secret123").await?;
    page.locator_text("Log In").human_click(ActionOptions::expecting(
        Expectation::Text { target: LocatorSpec::css("#welcome"), value: "Welcome back".into(), contains: true },
    )).await?;

    browser.close().await?;
    Ok(())
}

Dependable actions in 0.6

Actions use strict locators, visibility/enabled checks, stable hit-tested pointer positions and one deadline. Click, typing, key and drag actions require an explicit expected result. Successful actions and Error::Action failures carry receipts distinguishing not dispatched, unknown outcome and verified completion. No action is replayed after dispatch. Migration and complete contract. Durable operation IDs and download recovery are provided by eoka-tools.

For an agent exploring an unfamiliar page, page.explore(action, options) uses the same actionability checks, deadline and input cleanup while allowing actions without a predicted result. A dispatched click returns Ok(receipt) with outcome_unknown unless an explicit expectation proves completion. Intrinsic checks, such as verifying a filled value, still run. Always inspect the receipt; Ok alone does not establish that the website completed the task. Page::act and existing convenience methods retain their strict verification contract.

API

Browser

let browser = Browser::launch().await?;
let browser = Browser::launch_visible().await?;
let browser = Browser::launch_debug().await?;
let browser = Browser::launch_with(|config| {
    config.proxy = Some("http://127.0.0.1:8080".into());
}).await?;
let browser = Browser::launch_with_config(config).await?;
let page = browser.new_page("https://example.com").await?;
let tabs = browser.tabs().await?;
browser.activate_tab(id).await?;
browser.close_tab(id).await?;
browser.close().await?;

Viewport and device scale

page.set_viewport(640, 360, 2.0).await?;
let png = page.screenshot().await?;
page.reset_viewport().await?;

Dimensions are CSS pixels; 640×360 at device scale factor 2 produces a 1280×720 PNG. Width and height must be positive and fit a signed 32-bit CDP dimension. Scale must be positive and finite.

Non-live sessions apply StealthConfig.viewport_width, viewport_height and device_scale_factor at setup. Live attachment preserves existing metrics until explicitly changed. Overrides persist across navigation. Reset clears emulation and restores native window content dimensions/device scale; it does not resize the window or restore the configured launch override.

Fractional host display scaling can quantize effective CSS dimensions and DPR. Use measured DOM layout as the authority; Eoka does not mask those native values. Fractional capture boundaries follow Chrome's native rasterization, including edge rounding/artifacts. For pixel-aligned exports, align dimensions and DPR with the host pixel grid and verify the captured frame. Native capture/reset can refresh Chrome's hidden-tab outerWidth/outerHeight readings without changing actual browser window bounds; Eoka does not mask these native values. Viewport changes and captures are coordinated across Eoka handles connected through the same browser endpoint in this process. Independent CDP clients and other processes are outside that coordination; explicitly set the desired viewport before capturing a tab they have emulated.

Typed screenshots

use eoka::{ScreenshotClip, ScreenshotFormat, ScreenshotOptions};

let webp = page.screenshot_with_options(&ScreenshotOptions {
    format: ScreenshotFormat::Webp,
    quality: Some(90),
    clip: Some(ScreenshotClip { x: 20.0, y: 100.0, width: 320.0, height: 180.0 }),
    full_page: false,
}).await?;
let full_png = page.screenshot_with_options(&ScreenshotOptions {
    full_page: true,
    ..Default::default()
}).await?;

screenshot() remains the viewport PNG convenience and screenshot_jpeg(80) captures viewport JPEG. Typed options also support WebP. JPEG/WebP quality must be 0–100; PNG rejects quality. Crop coordinates are document-relative CSS pixels, including portions outside the visible viewport, with finite nonnegative positions and finite positive dimensions. Crop and full-page are mutually exclusive. Invalid options return Error::InvalidScreenshotOptions before contacting Chrome, including out-of-range quality supplied to screenshot_jpeg.

Viewport DPR is the only render scale: a 320×180 crop at DPR 2 yields 640×360 pixels. Full-page capture uses Chrome's CSS content bounds without resizing the viewport; capture preserves viewport metrics and scroll position. Large captures remain subject to Chrome's renderer/image-size and available-memory limits and the 64 MiB CDP message/frame budget, including base64 and JSON overhead. They can fail with a CDP or transport error. For deterministic exports, use a fixed viewport or crop rather than a full page whose layout dimensions may change.

Native recording

use eoka::NativeRecordingOptions;
use std::io::Write;

let recording = page.start_recording(NativeRecordingOptions {
    max_width: Some(1280),
    max_height: Some(720),
    fps: Some(30.0),
}).await?;
// Drive the page while recording, then explicitly finalize.
recording.stop().await?;
let mut file = std::fs::OpenOptions::new()
    .write(true).create_new(true).open("capture.mp4")?;
loop {
    let chunk = recording.read_chunk().await?;
    file.write_all(&chunk.data)?;
    if chunk.eof { break; }
}
recording.close().await?;
file.flush()?;

The experimental native Chrome recorder requires a ready, active page and allows one recorder per target, shared across Eoka handles. Unsupported commands or native encoders fail explicitly; there is no alternate recorder or FFmpeg runtime requirement. Output is MP4 with a Chrome-selected codec, not guaranteed H.264. Audio is not promised. Maximum dimensions must be positive; FPS must be an integer from 1 through 120 and is a ceiling, not deterministic fixed-FPS playback.

Chrome for Testing 155.0.8059.39 can emit zero MP4 sample durations and duplicate decoding timestamps. This also occurs through direct CDP without Eoka. The core preserves Chrome's original stream; it does not rewrite timestamps or transcode. A decodable file is not proof of strictly increasing timestamps. Native recording remains experimental: consumers must inspect packet timestamps and decoder diagnostics. The paired Node sidecar separately applies bounded MP4 timing corrections without transcoding before publication and qualifies the resulting timestamps and diagnostics. This is not an upstream Chrome fix or a guarantee about the core's raw stream.

stop() enters the output stream; read_chunk() returns at most 64 KiB decoded bytes with explicit EOF, and close() releases the stream. cancel() discards an unfinished recording with bounded cleanup; Drop attempts best-effort cleanup when an async runtime is available. wait_for_failure() observes target/session/transport loss without waiting behind recording commands. RecordingError distinguishes unsupported/precondition/state failures and uncertain cleanup, which must not be treated as permission to restart. Cleanup acknowledgement is bounded; if it expires, owned cleanup remains scheduled and the target reservation is retained rather than reporting that resources were released. The core does not own output-file publication: callers must handle streaming/write failures and cleanup; the Node sidecar additionally stages and atomically publishes without overwriting, and its Recording.stop() returns only a completed artifact.

Read chunks sequentially: overlapping read_chunk() calls fail with RecordingError::InvalidState without consuming another chunk or cancelling the accepted read. Cancelling a read before its chunk is delivered fails the recording and schedules cleanup, rather than allowing a silently truncated output stream.

Connection teardown and borrowed-browser close clean up only recordings owned by that connection, not another connection's recorder on the same target. Explicit target close cancels the target's recording. Teardown cleanup survives cancellation of its waiting caller.

Finding Elements

page.find("#button").await?;                    // CSS selector
page.find_all(".item").await?;                  // all matches
page.find_by_text("Sign In").await?;            // by visible text
page.find_any(&["#email", "[name='email']"]).await?; // first match
page.exists("#popup").await;                    // bool
page.text_exists("Error").await;                // bool

Clicking

Configure a fresh expectation for the operation before using convenience methods:

let page = page.with_action_options(ActionOptions::expecting(
    Expectation::Text { target: LocatorSpec::css("#status"), value: "Done".into(), contains: false },
));
page.click("#button").await?;                   // actionability + verification
page.human_click("#button").await?;             // with mouse movement
page.click_by_text("Submit").await?;
page.human_click_by_text("Submit").await?;
page.try_click("#optional").await?;             // Ok(false) if missing
page.try_click_by_text("Accept").await?;

// Native held pointer input for drags. Call release_all_inputs before close
// if an operation is interrupted.
page.mouse_move(100.0, 100.0).await?;
page.mouse_down(100.0, 100.0, eoka::MouseButton::Left).await?;
page.mouse_move(300.0, 100.0).await?;
page.mouse_up(300.0, 100.0, eoka::MouseButton::Left).await?;

Typing

page.fill("#email", "user@example.com").await?;     // clear + type + verify
page.fill("#volume", "50").await?;                    // range: validates, sets, input/change
page.human_fill("#email", "user@example.com").await?; // human-like
page.type_into("#search", "query").await?;           // append (no clear)
page.human_type("#search", "query").await?;

Waiting

page.wait_for("#results", 10_000).await?;           // in DOM
page.wait_for_visible("#email", 10_000).await?;     // visible + clickable
page.wait_for_hidden(".loading", 5_000).await?;
page.wait_for_any(&["#ok", ".error"], 10_000).await?;
page.wait_for_text("Success", 10_000).await?;
page.wait_for_url_contains("dashboard", 10_000).await?;
page.wait_for_url_change(10_000).await?;
page.wait_for_network_idle(500, 30_000).await?;     // XHR/fetch idle

Network idle uses a private CDP session installed before a new page navigates. It waits for the top document to load and for its fetch/XHR requests, including response bodies, to remain idle for the requested interval. It includes requests already running when the wait starts and is independent of request capture. Workers, subframes, and WebSockets are outside this scope. A previously untracked tab attached with attach_page needs a full navigation or reload before this wait can succeed; changing only the URL fragment is insufficient. Disconnection or tracking failure returns an error, and the timeout bounds the entire wait.

Elements

let elem = page.find("#btn").await?;
elem.click().await?;
elem.is_visible().await?;           // Result<bool>
elem.bounding_box().await;          // Option<BoundingBox>
elem.get_attribute("href").await?;  // Option<String>
elem.tag_name().await?;
elem.value().await?;
elem.text().await?;
elem.is_enabled().await?;
elem.is_checked().await?;
elem.css("color").await?;
elem.scroll_into_view().await?;

Keyboard, Hover, Select, Upload

Printable press_key / key_down events carry native text: "o" inserts o, "O" inserts O, and "Shift+o" inserts O. Shift uses US-keyboard ASCII mappings; single Unicode characters are literal. Ctrl/Alt/Meta shortcuts, key-up and input cleanup do not insert text. Browser focus, read-only fields and page preventDefault() handlers still determine whether an edit occurs. For whole strings or composed text, use type_text.

page.press_key("Enter").await?;
page.dispatch_key("Ctrl+A").await?; // raw primitive for manual input sequences
page.key_down("Shift").await?; // held across calls, with browser-native CDP input
page.key_down("ArrowRight").await?;
page.key_up("ArrowRight").await?;
page.key_up("Shift").await?;
page.release_all_inputs().await?; // cleanup interrupted held input
page.select_all().await?;
page.copy().await?;
page.paste().await?;

page.hover("#menu").await?;
page.human_hover("#menu").await?;

page.select("#country", "US").await?;
page.select_by_text("#country", "United States").await?;

page.upload_file("input[type='file']", "/path/to/file.pdf").await?;
page.upload_files("input[type='file']", &["/a.pdf", "/b.pdf"]).await?;

JavaScript & Frames

let count: i32 = page.evaluate("document.querySelectorAll('li').length").await?;
page.execute("window.scrollTo(0, 1000)").await?;
let title: String = page.evaluate_in_frame("iframe#widget", "document.title").await?;

for frame in page.frames().await? {
    let title: String = page.evaluate_in_frame_id(&frame.id, "document.title").await?;
    let ancestors = page.frame_ancestor_ids(&frame.id).await?;
}

frames() includes nested out-of-process iframes belonging to this page. Both evaluation methods use CDP isolated worlds without enabling Runtime; they can access cross-origin frame DOM, but not page-owned JavaScript globals. evaluate_in_frame requires a CSS selector matching exactly one frame element in the top document; use IDs for nested frames. Bare URLs and numeric indices are not selectors. Ancestors are ordered from the immediate parent to the root, excluding the queried frame. These are snapshot APIs, not stable navigation identities; reacquire IDs after navigation. Explicit JavaScript null decodes as JSON null (or None); undefined still errors.

page.frame_element_content_quad(frame_id, selector, index) returns eight coordinates in content-corner order, preserving reflections through open and closed shadow-slot ancestry. Coordinates are relative to the owning CDP session's viewport, not necessarily the root page or local iframe. Selectors are limited to 4096 bytes and 64 matches; the index must be below 64. Missing, detached, fragmented and degenerate boxes fail. This is geometry, not a visibility/hit-test guarantee. Temporary remote objects are released on success; errors/cancellation schedule bounded best-effort cleanup.

page.frame_point_to_viewport(frame_id, x, y) maps frame-local CSS points to the root viewport through nested/OOPIF borders, padding, scrolling and positive scaling. Hidden, reflected, rotated or out-of-viewport geometry is rejected, including closed shadow slots. Wait for rendering after layout changes; this is not a hit test.

For input, page.frame_point_for_input(frame_id, x, y) also requires each parent document to hit the owning iframe at the mapped point. Overlays (including other iframes) and inaccessible shadow-root hit paths are rejected. Validate the leaf element separately and use the returned point unchanged; these are snapshot-time checks, not protection against subsequent page mutation.

Horizontal dragging and cleanup

page.human_drag(selector, dx), element.human_drag_by(dx) and Human::drag_by(x, y, dx) drag with overshoot and settling. Human::drag_horizontal_by(x, y, dx) keeps Y fixed and X monotonic. Drags preserve other held buttons and reject an already-held left button. Retain the helper across cancellation to confirm release before further input:

let human = page.human();
let result = tokio::time::timeout(
    std::time::Duration::from_secs(5),
    human.drag_horizontal_by(120.0, 120.0, 150.0),
).await;
human.finish_drag_cleanup().await?;
result??;

Release has a separate three-second timeout. Cancelled cleanup waits can be resumed; dropping the helper only schedules best-effort release. Cleanup failures require inspection.

Frame response capture

page.capture_frame_responses(frame_id, options) captures responses for exactly one frame, surviving its removal. Use snapshot() for retained records and stop().await for cleanup and loss/error counters; Drop does not wait. Bodies and headers are opt-in. Defaults: 128 records, 64 KiB/body, 1 MiB total. Limits bound retention, not transient CDP payloads; Debug omits body/header values. Fetch headers do not prove which cookies were sent on the wire.

Low-level request ownership

eoka::cdp::Transport provides an opt-in request-stage Fetch route per session:

• install_request_route(session, bounded_sender, dropped_counter) claims ownership; a duplicate owner is rejected. Delivered RequestPause values belong to the consumer and must be resolved once, including on shutdown.
• set_request_interception(session, Some(patterns)) configures interception. None restores the base policy. Header stripping/proxy authentication may require wildcard request interception; consumers then filter URLs themselves.
• remove_request_route(session) removes future ownership only. Unowned, full-queue and closed-queue events are auto-continued; queue failures increment the supplied counter. Already-delivered pauses still need resolution.

RequestPause::continue_request() preserves the header-stripping policy. For cancellable work, use continue_request_with_dispatch() or Transport::send_to_session_with_dispatch() with a fresh eoka::cdp::transport::CommandDispatch token. may_have_been_sent() is irreversible uncertainty, not acknowledgment: never replay a possibly sent resolution after an error/timeout. A false observation permits handoff only after the originating future has terminated or been dropped. Tokens cannot be reused. Cancellation removes the local pending waiter, not the remote command. Raw pause payloads can contain sensitive request metadata; avoid logging them.

Page Info & Debug

page.url().await?;
page.title().await?;
page.content().await?;              // full HTML
page.text().await?;                 // visible text
page.screenshot().await?;           // PNG bytes
page.screenshot_jpeg(80).await?;    // JPEG at quality 80
page.screenshot_with_options(&options).await?; // typed format/crop/full-page bytes
page.debug_state().await?;          // PageState with element counts
page.debug_screenshot("step1").await?; // timestamped screenshot

Multi-Tab

let page1 = browser.new_page("https://a.com").await?;
let page2 = browser.new_page("https://b.com").await?;
browser.activate_tab(page1.target_id()).await?;
browser.close_tab(page2.target_id()).await?;

Browser ownership and debugging ports

Explicit debugging ports are preserved; live launches default to a nonzero port. close() gives owned browsers up to five seconds to flush state before termination. Attached browsers are only disconnected, regardless of live-mode configuration.

Connect to an existing Chrome

Attach to a browser you already launched with --remote-debugging-port instead of spawning one. Defaults to StealthConfig::live(), so the user's tabs are left untouched (no evasion injection).

// Start Chrome yourself: chrome --remote-debugging-port=9222
let browser = Browser::connect_port(9222).await?;           // HTTP discovery
// or, with the ws:// URL from http://localhost:9222/json/version:
let browser = Browser::connect("ws://127.0.0.1:9222/devtools/browser/...").await?;

for tab in browser.tabs().await? {
    println!("{} — {}", tab.title, tab.url);
}
let page = browser.attach_page(&target_id).await?;
browser.disconnect().await?;                                // leaves Chrome running

Navigation

page.goto("https://example.com").await?;
page.goto_with_referrer("https://example.com", "https://google.com").await?;
page.goto_with_headers("https://example.com", headers).await?;
page.reload().await?;
page.back().await?;
page.forward().await?;

goto_with_headers clears extra headers to an empty map after navigation, error, or cancellation; it does not restore earlier persistent headers. Navigation and header changes through handles for the same target are serialized. After cancellation, cleanup runs for up to five seconds and subsequent page commands wait for it. A cleanup failure remains an error until clear_extra_headers() successfully retries restoration, including on the original attachment session. Raw transport commands bypass this coordination.

Network & Cookies

let cookies = page.cookies().await?;
page.set_cookie("name", "value", Some("example.com"), None).await?;
page.delete_cookie("name", None).await?;
page.clear_all_cookies().await?;

page.enable_request_capture().await?;       // start capturing XHR/fetch
let body = page.get_response_body(id).await?;
page.disable_request_capture().await?;

For bounded text inspection with the page's credentials:

let request = eoka::BoundedFetchRequest::get("/api/me");
let response = page.fetch_bounded(&request).await?;
assert!(response.bytes_read <= 8192);

max_bytes accepts zero (headers only) through MAX_TEXT_FETCH_BYTES (16 MiB). Known binary MIME bodies are omitted. Reading cancels at the limit and reports conservative truncation; incomplete trailing UTF-8 is omitted. This bounds retained text, not Chrome's native buffers. The original Page::fetch API is unchanged.

For native files, browser.watch_downloads(&staging_directory) exclusively configures allowAndName and subscribes before the caller triggers input. DownloadWatch exposes beginning/progress events, cancellation, popup ancestry, and explicit stop() cleanup. Only owned browsers are supported. Target discovery is enabled for the watch and disabled on restoration; this assumes no competing owner of browser download or target-discovery settings. Event loss/disconnection fails; failed restoration prevents further watchers on that browser. Drop schedules bounded restoration but cannot confirm it to the caller.

page.navigate_for_download(url, referrer) accepts native attachment navigation; a returned navigation result alone never proves a file downloaded. Wait for native completion and verify the regular file under its GUID. Untrusted suggested names must not determine filesystem paths. Destination handling, jobs and no-overwrite publication live in the sister eoka-tools repository. Core regression: cargo test --lib download::.

Configuration & Dialogs

page.set_bypass_csp(true).await?;           // disable CSP
page.set_javascript_enabled(false).await?;  // disable JS entirely (before navigation)
page.set_user_agent("custom UA").await?;
page.ignore_cert_errors(true).await?;
page.accept_dialog(None).await?;            // accept alert/confirm
page.dismiss_dialog().await?;               // dismiss dialog

page.ignore_cert_errors takes effect only for navigations issued after the call — too late for new_page(url)'s own initial navigate. For a bad cert on the very first load (e.g. an .onion service redirecting http:// → untrusted https://), set StealthConfig.ignore_cert_errors = true instead, or use new_blank_page() + ignore_cert_errors(true) + goto().

Retry

Use a locator with one deadline for actions. with_retry never retries an Error::Action, including an uncertain timeout. It remains available for caller-chosen read-only operations.

let receipt = page.locator("#save").click(ActionOptions {
    timeout_ms: 5_000,
    ..ActionOptions::expecting(Expectation::Visible { target: LocatorSpec::css("#confirmation") })
}).await?;

Config

Most code does not need to construct a config. Browser::launch() starts with stealth defaults in headless mode. Browser::launch_visible() and Browser::launch_debug() are explicit opt-ins for local workflows that need a window.

For small tweaks, mutate the default config inline:

let browser = Browser::launch_with(|config| {
    config.headless = false;
    config.proxy = Some("http://127.0.0.1:8080".into());
}).await?;

Two server-side reputation signals are handled automatically for spawned stealth browsers (see StealthConfig):

• strip_x_client_data: true (default) — Chrome's X-Client-Data request header (field-trial variation IDs) is stripped via CDP Fetch interception on every page, and --disable-field-trial-config is passed at launch.
• geo_align: false — opt-in. Aligns timezone and navigator.languages with the browser's apparent public IP via a one-shot lookup before the first real navigation. Ignored when timezone is set explicitly.

Managed launch and ownership

chrome_path selects an absolute, readable executable. A missing, non-executable, or relative explicit path fails without discovering another browser. Linux patching resolves an installed wrapper to its associated ELF binary, never to an unrelated browser. Patching copies that binary and preserves its companion libraries/resources; the source installation is not modified.

runtime_dir selects an absolute writable parent directory. Each owned launch creates a unique child there (0700 on Unix) containing its ephemeral profile, patch artifacts, and Chrome temporary files. TMPDIR, TMP, and TEMP are set only on child commands, never on the calling process. An explicit runtime root does not depend on the default temporary directory. The caller's root and any explicit user_data_dir are preserved, including existing profile permissions.

On Unix, patch-cache directories must belong to the effective user and grant no group/other permissions (new directories use 0700). Their canonical ancestors must belong to that user or root; group/other-writable ancestors require sticky protection, as with /tmp. Unsafe existing directories or links are rejected without changing permissions. Choose a trusted runtime_dir or temporary root. macOS bundle links are checked after relocation and before cached reuse so they cannot reach outside the owned copy.

let browser = Browser::launch_with(|config| {
    config.chrome_path = Some("/opt/chrome-for-testing/chrome".into());
    config.runtime_dir = Some("/var/lib/my-app/browser-runtime".into());
    config.sandbox = true;
}).await?;
assert!(browser.owns_process());
println!("{}", browser.version().await?); // actual CDP browser product
browser.close().await?;

sandbox: false retains existing callers' unsandboxed launch behavior. Set sandbox: true to enable Chrome's sandbox; an unsupported environment returns the launch error without retrying unsandboxed. Sandbox-control switches in extra_args are rejected: use the boolean rather than conflicting arguments. Existing-profile reuse cannot apply new launch policy, so an active profile rejects explicit executable/runtime paths or enabled sandboxing. Legacy default reuse remains borrowed and does not modify existing tabs.

Browser::close terminates owned Chrome and reports runtime cleanup failures. Browser::disconnect does not send Browser.close, but still terminates an owned process; it preserves Chrome only for borrowed handles. Drop and startup cancellation perform best-effort owned cleanup, logging failures. Page handles do not prevent a dropped owned Browser from terminating its process. Borrowed browser processes and caller profiles are never deleted by this cleanup.

The eoka-tools sidecar's caller-loss cleanup relies on stdin EOF/broken-pipe detection while the sidecar is still running. Direct SIGKILL of the sidecar or a process embedding this crate cannot execute destructors: it cannot guarantee Chrome or runtime cleanup. These are not portable parent-death OS guarantees.

For reusable presets or advanced setup, build a StealthConfig directly:

let config = StealthConfig {
    headless: false,
    patch_binary: true,
    human_mouse: true,
    human_typing: true,
    debug: true,
    ..Default::default()
};

let browser = Browser::launch_with_config(config).await?;

// Presets for advanced config composition
StealthConfig::visible()   // headless: false
StealthConfig::debug()     // headless: false, debug: true

Development checks

cargo fmt --all --check
cargo clippy --all-features --locked -- -D warnings
cargo test --all-features --locked
cargo build --examples --locked
cargo +1.85.0 check --lib --all-features --locked
xvfb-run -a cargo test --all-features --locked --no-fail-fast --tests -- --ignored --test-threads=1

The last command requires Chrome and Xvfb and runs every ignored browser test. CI pins Chrome for Testing 155.0.8059.39 and retains the browser-test log. These local HTTP fixtures check browser behavior; they do not establish detector bypass.

Detection Results

Patches Chrome binary, injects 15 evasion scripts, blocks detectable CDP commands at the transport layer, simulates human input with Bezier curves.

• Passes: sannysoft, rebrowser bot detector (6/6), areyouheadless, browserleaks
• Partial: creepjs (33% trust score)

How it Works

Eoka uses hand-written CDP schemas and a small dependency graph. Transport, interception policy, Chrome process management, and session commands have separate modules. JavaScript evasions are embedded from individual .js assets at compile time.

src/
├── cdp/           # connections, transport and domain-specific schemas
├── stealth/       # script assets, fingerprints, binary patcher, human simulation
├── browser.rs     # browser API and session setup
├── browser/       # launch preparation, profile ownership and geo alignment
├── page.rs        # page api
└── session.rs     # cookie export

The key insight: most detection comes from CDP commands leaking (Runtime.enable fires consoleAPICalled events that pages can detect). eoka blocks those at the transport layer and defines navigator properties on the prototype instead of the instance.

Ecosystem

Crate	Description
eoka-agent	AI agent layer with MCP server
eoka-runner	Config-based automation (YAML flows)

License

MIT