feat: add web search tools extension

docs/superpowers/plans/2026-04-09-web-search-tools.md

@@ -1186,7 +1186,7 @@ git -C /home/alex/dotfiles commit -m "feat: add web_search tool"
 - Test: `/home/alex/dotfiles/.pi/agent/extensions/web-search/src/tools/web-fetch.test.ts`
 - Test: `/home/alex/dotfiles/.pi/agent/extensions/web-search/src/extension.test.ts`
 
-- [ ] **Step 1: Write the failing `web_fetch` and extension registration tests**
+- [x] **Step 1: Write the failing `web_fetch` and extension registration tests**
 
 Create `/home/alex/dotfiles/.pi/agent/extensions/web-search/src/tools/web-fetch.test.ts` with this content:
 
@@ -1275,7 +1275,7 @@ test("the extension entrypoint registers both web_search and web_fetch", () => {
 });
 ```
 
-- [ ] **Step 2: Run the new tests to verify they fail**
+- [x] **Step 2: Run the new tests to verify they fail**
 
 Run:
 
@@ -1286,7 +1286,7 @@ npx tsx --test src/tools/web-fetch.test.ts src/extension.test.ts
 
 Expected: `FAIL` with an `ERR_MODULE_NOT_FOUND` error for `./web-fetch.ts`.
 
-- [ ] **Step 3: Write the minimal `web_fetch` tool implementation**
+- [x] **Step 3: Write the minimal `web_fetch` tool implementation**
 
 Create `/home/alex/dotfiles/.pi/agent/extensions/web-search/src/tools/web-fetch.ts` with this content:
 
@@ -1383,7 +1383,7 @@ export function createWebFetchTool({ resolveProvider }: FetchToolDeps) {
 }
 ```
 
-- [ ] **Step 4: Replace the temporary entrypoint with the final entrypoint that registers both tools**
+- [x] **Step 4: Replace the temporary entrypoint with the final entrypoint that registers both tools**
 
 Replace `/home/alex/dotfiles/.pi/agent/extensions/web-search/index.ts` with this content:
 
@@ -1420,7 +1420,7 @@ export default function webSearch(pi: ExtensionAPI) {
 }
 ```
 
-- [ ] **Step 5: Run the `web_fetch` and entrypoint smoke tests to verify they pass**
+- [x] **Step 5: Run the `web_fetch` and entrypoint smoke tests to verify they pass**
 
 Run:
 
@@ -1431,7 +1431,7 @@ npx tsx --test src/tools/web-fetch.test.ts src/extension.test.ts
 
 Expected: `PASS` for all four tests.
 
-- [ ] **Step 6: Reload pi and manually verify search + single fetch + batch fetch**
+- [x] **Step 6: Reload pi and manually verify search + single fetch + batch fetch**
 
 Run:
 
@@ -1458,7 +1458,7 @@ Expected manual checks:
 - batch fetch output is clearly separated per URL
 - if one URL fails, the result still includes the successful URL output and a failure section for the bad URL
 
-- [ ] **Step 7: Commit the completed web tools extension**
+- [x] **Step 7: Commit the completed web tools extension**
 
 Run: