Web search for pi through an existing Chrome over CDP

Attaches to a browser that is already running — never launches one —
using the same endpoint configuration as pi-browser-harness, so a single
/browser-target choice governs both packages.

One tool, castle_cdp_search, deliberately not named web_search so it
coexists with pi-web-access rather than shadowing it.

Notes from validating against castle's Chrome:

- tbs=qdr:*, the parameter Google's own Tools menu writes, renders an
  empty page on this profile; the older as_qdr=* works. Any date filter
  combined with udm=14 is also empty, so recency drops udm.
- Target.createTarget must not be raced against the abort signal:
  raceAbort abandons the promise but cannot cancel the command, and the
  command's side effect is a tab nothing is left holding.
- A search cancelled while queued has to be removed from the semaphore
  queue, or the slot handed to it later is never counted back.
- A decaying rate-limit block stops serving /sorry/ and returns an empty
  results page instead, indistinguishable from a genuine zero-hit search.

1 files changed, 38 insertions, 0 deletions

diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3e31124
--- /dev/null
+++ b/package.json
@@ -0,0 +1,38 @@
+{
+  "name": "pi-castle-cdp-search",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Web search for pi through an already-running Chrome on the wire network, driven over CDP",
+  "keywords": [
+    "pi-package",
+    "pi-extension",
+    "search",
+    "cdp",
+    "chrome"
+  ],
+  "license": "MIT",
+  "type": "module",
+  "engines": {
+    "node": ">=22.0.0"
+  },
+  "files": [
+    "src/",
+    "tsconfig.json",
+    "README.md"
+  ],
+  "pi": {
+    "extensions": [
+      "./src/index.ts"
+    ]
+  },
+  "scripts": {
+    "typecheck": "tsc --noEmit",
+    "test": "node --experimental-strip-types --test test/*.test.ts"
+  },
+  "devDependencies": {
+    "@earendil-works/pi-ai": "*",
+    "@earendil-works/pi-coding-agent": "*",
+    "typebox": "*",
+    "typescript": "^5.0.0"
+  }
+}