feat!: remove the deep-research feature

The harness ships browser tools; orchestrating a multi-agent research
workflow on top of them is the agent's job, not this extension's. Drops
the skill, the /deep-research command, and the web-search-researcher
subagent config.

browser_web_search and browser_read_page are untouched — the two tests
that covered their pure parsers move to test/domains/, where the test
glob still picks them up.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

8 files changed, 0 insertions, 238 deletions

diff --git a/test/deep-research/agent-config-test.ts b/test/deep-research/agent-config-test.ts
deleted file mode 100644
index 025a844..0000000
--- a/test/deep-research/agent-config-test.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import { test, before, describe } from "node:test";
-import assert from "node:assert/strict";
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-
-describe("web-search-researcher subagent config references only real tools", () => {
-  let frontmatter: string;
-  let body: string;
-  let toolsLine: string;
-
-  before(() => {
-    const agentPath = join(import.meta.dirname, "..", "..", ".pi", "agents", "web-search-researcher.md");
-    const raw = readFileSync(agentPath, "utf8");
-    const fmMatch = raw.match(/^---\n([\s\S]*?)\n---/);
-    frontmatter = fmMatch ? (fmMatch[1] ?? "") : "";
-    body = fmMatch ? raw.slice(fmMatch[0].length) : raw;
-    toolsLine = frontmatter.split("\n").find((l) => l.startsWith("tools:")) ?? "";
-  });
-
-  test("S20: tools includes browser_web_search", () => {
-    assert.ok(toolsLine.includes("browser_web_search"));
-  });
-
-  test("S20: tools includes browser_read_page", () => {
-    assert.ok(toolsLine.includes("browser_read_page"));
-  });
-
-  test("S20: tools does NOT include web_search", () => {
-    assert.ok(!/\bweb_search\b/.test(toolsLine));
-  });
-
-  test("S20: tools does NOT include web_fetch", () => {
-    assert.ok(!/\bweb_fetch\b/.test(toolsLine));
-  });
-
-  test("S20: isolated: true is present", () => {
-    assert.ok(/^\s*isolated:\s*true\s*$/m.test(frontmatter));
-  });
-
-  test("S20: body has no WebSearch/WebFetch references", () => {
-    assert.ok(!/WebSearch|WebFetch/.test(body));
-  });
-});
diff --git a/test/deep-research/fixtures/article-capture.json b/test/deep-research/fixtures/article-capture.json
deleted file mode 100644
index df9c67c..0000000
--- a/test/deep-research/fixtures/article-capture.json
+++ /dev/null
@@ -1,17 +0,0 @@
-{
-  "url": "https://blog.example.com/how-cdp-works",
-  "title": "How the Chrome DevTools Protocol Works",
-  "blocks": [
-    { "kind": "other", "text": "Home Products Blog About Contact", "linkTextLength": 33, "inBoilerplate": true },
-    { "kind": "heading", "text": "How the Chrome DevTools Protocol Works", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "paragraph", "text": "The Chrome DevTools Protocol lets tools instrument, inspect, and control Chromium-based browsers over a WebSocket connection.", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "paragraph", "text": "Each command targets a domain such as Page, Runtime, or Network, and receives a structured JSON response that the client correlates by id.", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "heading", "text": "Sessions and Targets", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "paragraph", "text": "A target is a page or worker; attaching to one yields a session id that scopes subsequent commands to that target without disturbing others.", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "listitem", "text": "Attach with Target.attachToTarget", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "listitem", "text": "Drive with Runtime.evaluate", "linkTextLength": 0, "inBoilerplate": false },
-    { "kind": "paragraph", "text": "Subscribe here for our newsletter and follow us on social media for updates", "linkTextLength": 55, "inBoilerplate": true },
-    { "kind": "other", "text": "Copyright 2026 Example Inc. Privacy Terms Cookies", "linkTextLength": 24, "inBoilerplate": true }
-  ],
-  "bodyText": "Home Products Blog How the Chrome DevTools Protocol Works The Chrome DevTools Protocol lets tools instrument inspect and control browsers Copyright 2026"
-}
diff --git a/test/deep-research/fixtures/google-serp-captcha.json b/test/deep-research/fixtures/google-serp-captcha.json
deleted file mode 100644
index 7c6610f..0000000
--- a/test/deep-research/fixtures/google-serp-captcha.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "anchors": [],
-  "pageText": "About this page Our systems have detected unusual traffic from your computer network. This page checks to see if it's really you sending the requests and not a robot. Why did this happen? To continue, please type the characters below. reCAPTCHA."
-}
diff --git a/test/deep-research/fixtures/google-serp-empty.json b/test/deep-research/fixtures/google-serp-empty.json
deleted file mode 100644
index 34bb1dc..0000000
--- a/test/deep-research/fixtures/google-serp-empty.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "anchors": [],
-  "pageText": "Your search - asdkfjhqwlekjrhqwlekjrhqwe - did not match any documents. Suggestions: Make sure that all words are spelled correctly. Try different keywords."
-}
diff --git a/test/deep-research/fixtures/google-serp-ok.json b/test/deep-research/fixtures/google-serp-ok.json
deleted file mode 100644
index 61aa483..0000000
--- a/test/deep-research/fixtures/google-serp-ok.json
+++ /dev/null
@@ -1,40 +0,0 @@
-{
-  "anchors": [
-    {
-      "href": "https://www.google.com/url?q=https://real.example/x&sa=U&ved=abc",
-      "heading": "Real Example X — the definitive guide",
-      "snippet": "Real Example X — the definitive guide. Everything about x, explained clearly."
-    },
-    {
-      "href": "https://docs.example.org/guide",
-      "heading": "Official Guide",
-      "snippet": "Official Guide to the thing you searched for."
-    },
-    {
-      "href": "https://www.google.com/search?q=related",
-      "heading": "Related searches on Google",
-      "snippet": "internal google navigation"
-    },
-    {
-      "href": "javascript:void(0)",
-      "heading": "Expand",
-      "snippet": "ui control"
-    },
-    {
-      "href": "https://real.example/x/",
-      "heading": "Real Example X (duplicate with trailing slash)",
-      "snippet": "should be deduped against the first result"
-    },
-    {
-      "href": "https://second.example/a",
-      "heading": "Second Example A",
-      "snippet": "Second result body."
-    },
-    {
-      "href": "https://third.example/b",
-      "heading": "Third Example B",
-      "snippet": "Third result body."
-    }
-  ],
-  "pageText": "Real Example X the definitive guide Official Guide Second Example Third Example About 12,300 results"
-}
diff --git a/test/deep-research/fixtures/no-article-capture.json b/test/deep-research/fixtures/no-article-capture.json
deleted file mode 100644
index d367b7e..0000000
--- a/test/deep-research/fixtures/no-article-capture.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "url": "https://app.example.com/dashboard",
-  "title": "Dashboard",
-  "blocks": [
-    { "kind": "other", "text": "Menu", "linkTextLength": 4, "inBoilerplate": true },
-    { "kind": "listitem", "text": "Widget A", "linkTextLength": 8, "inBoilerplate": true },
-    { "kind": "listitem", "text": "Widget B", "linkTextLength": 8, "inBoilerplate": true }
-  ],
-  "bodyText": "Dashboard Widget A Widget B Your account is active. Usage this month is within limits and no action is required at this time from you."
-}
diff --git a/test/deep-research/readability-test.ts b/test/deep-research/readability-test.ts
deleted file mode 100644
index 211229d..0000000
--- a/test/deep-research/readability-test.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { test, describe } from "node:test";
-import assert from "node:assert/strict";
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-import { extractReadable, type PageCapture } from "../../src/domains/readpage/readability";
-
-const fixture = (name: string): PageCapture =>
-  JSON.parse(readFileSync(join(import.meta.dirname, "fixtures", name), "utf8")) as PageCapture;
-
-describe("pure readability extractor", () => {
-  test("S10: article body text is present", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(page.text.includes("Chrome DevTools Protocol lets tools instrument"));
-  });
-
-  test("S10: article headings are preserved", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(page.text.includes("Sessions and Targets"));
-  });
-
-  test("S10: nav boilerplate is dropped", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(!page.text.includes("Home Products Blog"));
-  });
-
-  test("S10: footer boilerplate is dropped", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(!page.text.includes("Copyright 2026"));
-  });
-
-  test("S10: high-link-density promo block is dropped", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(!page.text.includes("Subscribe here for our newsletter"));
-  });
-
-  test("S10: paragraph/heading structure preserved as markdown", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(page.text.includes("## Sessions and Targets"));
-  });
-
-  test("S10: title and url passed through", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(page.title === "How the Chrome DevTools Protocol Works" && page.url.startsWith("https://"));
-  });
-
-  test("S10: word count reflects the article body", () => {
-    const page = extractReadable(fixture("article-capture.json"));
-    assert.ok(page.wordCount > 40);
-  });
-
-  test("S11: structure-less page falls back to non-empty body text", () => {
-    const page = extractReadable(fixture("no-article-capture.json"));
-    assert.ok(page.text.length > 0);
-  });
-
-  test("S11: fallback body text carries the real content", () => {
-    const page = extractReadable(fixture("no-article-capture.json"));
-    assert.ok(page.text.includes("Your account is active"));
-  });
-});
diff --git a/test/deep-research/serp-parser-test.ts b/test/deep-research/serp-parser-test.ts
deleted file mode 100644
index 433c650..0000000
--- a/test/deep-research/serp-parser-test.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { test, describe } from "node:test";
-import assert from "node:assert/strict";
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-import { classifySerp, parseGoogleSerp, type SerpExtraction } from "../../src/domains/search/google-serp";
-
-const fixture = (name: string): SerpExtraction =>
-  JSON.parse(readFileSync(join(import.meta.dirname, "fixtures", name), "utf8")) as SerpExtraction;
-
-const ok = fixture("google-serp-ok.json");
-const captcha = fixture("google-serp-captcha.json");
-const empty = fixture("google-serp-empty.json");
-
-describe("pure Google SERP parser", () => {
-  test("S1: /url?q= redirect is unwrapped to the real target", () => {
-    const results = parseGoogleSerp(ok.anchors, 10);
-    const urls = results.map((r) => r.url);
-    assert.ok(urls.includes("https://real.example/x"));
-  });
-
-  test("S1: google-internal anchors are dropped", () => {
-    const results = parseGoogleSerp(ok.anchors, 10);
-    const urls = results.map((r) => r.url);
-    assert.ok(!urls.some((u) => u.includes("google.com")));
-  });
-
-  test("S1: javascript: anchors are dropped", () => {
-    const results = parseGoogleSerp(ok.anchors, 10);
-    const urls = results.map((r) => r.url);
-    assert.ok(!urls.some((u) => u.startsWith("javascript:")));
-  });
-
-  test("S2: trailing-slash duplicate collapses to one result", () => {
-    const results = parseGoogleSerp(ok.anchors, 10);
-    const realExampleCount = results.filter((r) => r.url.startsWith("https://real.example/x")).length;
-    assert.equal(realExampleCount, 1);
-  });
-
-  test("S2: rank runs 1..n in input order", () => {
-    const results = parseGoogleSerp(ok.anchors, 10);
-    assert.ok(results.every((r, i) => r.rank === i + 1));
-  });
-
-  test("S2: limit truncates and ranks stay 1..limit", () => {
-    const capped = parseGoogleSerp(ok.anchors, 2);
-    assert.ok(capped.length === 2 && capped[capped.length - 1]?.rank === 2);
-  });
-
-  test("S3: populated SERP classifies as ok", () => {
-    assert.equal(classifySerp(ok.pageText, parseGoogleSerp(ok.anchors, 10).length), "ok");
-  });
-
-  test("S3: captcha page classifies as captcha", () => {
-    assert.equal(classifySerp(captcha.pageText, 0), "captcha");
-  });
-
-  test("S3: empty results classify as no_results", () => {
-    assert.equal(classifySerp(empty.pageText, 0), "no_results");
-  });
-});