Returns the Feedthrough usage guide as a Markdown text document, with sections for the recommended workflow, tool-ordering tips, and selector advice. Read-only and takes no arguments; it does not touch the page or require a connected browser. Call it at the start of a debugging session if you are unfamiliar with Feedthrough or want a quick refresher.

Check whether a browser with the Feedthrough bridge is currently connected. Returns connected flag and a list of open tabs (id, url, which is active). Call this first — every tool except get_instructions requires a connected browser.

Return console output captured since the bridge connected. Covers every console method — log/warn/error/info/debug plus dir, table, assert, trace, count, countReset, time/timeEnd/timeLog, group/groupCollapsed/groupEnd, and clear. Each entry has a 'level' (the closest of the five standard levels); rich methods also carry a 'method' field, and console.trace() plus failing console.assert() entries include a 'stack'. Uncaught exceptions and unhandled promise rejections are also captured (level 'error', method 'uncaught' / 'unhandledrejection') even though the app never logged them. When the app is noisy with framework or deprecation warnings, pass levels: ['error'] (or ['error', 'warn']) so the real errors aren't buried, and use 'match' to narrow by content. Pass 'since' (a ms timestamp from an earlier entry's 'ts', or Date.now() before an action) to see only what happened after that point. Read-only: it returns a passively captured buffer and neither clears the console nor changes the page. Always check this early — app errors and debug output often identify the root cause immediately.

Return all fetch and XHR requests captured since the bridge connected, including URL, method, HTTP status, duration, request and response headers, and request and response bodies (bodies capped at 10 KB each — anything longer is truncated with a marker; binary responses are summarised). Use this to find failed requests (4xx/5xx), wrong URLs, slow calls, or to inspect what the app actually sent or received. Use 'filter' to narrow by URL/method and 'since' (a ms timestamp) to see only requests that fired after an action. Read-only: it returns a passively captured log and does not issue or modify any requests.

Query the page with a CSS selector and return a summary of every matching element (tag, id, classes, text content). Good for counting list items, checking what's rendered, or finding the right selector before calling inspect_element or click. Read-only: it only reads the DOM and never changes the page. Returns an empty list (not an error) when nothing matches, so it is also a safe existence check.

Return full details about a single element: tag, id, classes, all attributes, text content, bounding rect (top/right/bottom/left/width/height + page scroll and an inViewport flag), a compact ancestor 'path' (e.g. 'body > main > div#app > button.cta'), a curated set of computed styles (layout, box model, typography, positioning, flex/grid), an 'overflow' block when content is clipped/overflowing (scroll vs client size + per-axis x/y flags), a 'clipped' block when an ancestor's overflow cuts the element off (the clipping ancestor + which edges), an effective-visibility check ('visible' boolean, with a 'hiddenReason' such as 'ancestor div#modal display:none' or 'opacity:0' when not visible, accounting for ancestors), an occlusion check ('hittable' boolean from a center-point hit-test, with 'occludedBy' naming the element actually on top when something covers it), an 'a11y' block (resolved role, best-effort accessible name, and key states like expanded/checked/selected/disabled/hidden/tabindex), a 'pseudo' block with ::before/::after content when set (icon fonts, generated text), and live form state where applicable (an input's current value, checked, disabled, etc.). Pass 'properties' to additionally read any specific computed CSS properties by name — they come back under 'requested'. Use this to understand why an element looks wrong or isn't behaving as expected. Read-only: it only reads element state and never changes the page, and it returns an error if the selector matches nothing. Note: addEventListener-registered event handlers cannot be read from the page; only inline on* handler attributes appear (in 'attributes').