Src Browser Skill

local-search / src/browser

Purpose

Browser transport and runtime scripts for local signed-in browser control.

Mental model & key files

• discovery.rs finds a browser-level CDP websocket from --cdp, saved config, DevToolsActivePort, or common localhost ports.
• cdp.rs is a minimal browser-level CDP client using flattened target sessions.
• scripts.rs stores JavaScript snippets evaluated in the page for snapshots, interactions, extraction, readable content, and in-browser fetch.

Patterns to follow / invariants

• Connect to the browser websocket, then attach to a page target with Target.attachToTarget and flatten: true.
• Keep JavaScript snippets deterministic and return JSON-serializable values.
• Resolve @eN refs through data-local-browser-ref; snapshot is what assigns those refs.
• Default command discovery should prefer the managed local-search profile unless the user explicitly passes --cdp; direct discovery still supports explicit endpoints.

Common tasks → first action

• Add a CDP primitive: implement it on CdpClient, then call it from commands.
• Add a DOM operation: add a snippet function in scripts.rs and JSON-test the output through a real browser page.
• Add browser discovery: extend devtools_files() or explicit endpoint parsing.

Gotchas

• /json/version can return 404 on newer Chrome normal-profile debugging; the DevToolsActivePort browser websocket is the reliable path.
• Runtime.evaluate needs returnByValue for stable CLI JSON.
• HAR recording currently stores raw Network events in a HAR-shaped envelope; do not claim full browser-export HAR parity without adding response body capture.