feat(search): wire web_search into orchestrator + modernize Exa API

[wackhacker-bot]

The lockfile changes appear to be Bun re-resolving — exa-js going from missing → installed at 1.10.3 (matching ^1.4.4) and pulling its transitive deps (cross-fetch, openai, etc.). This is expected since the dep was declared but apparently not previously locked. I'll keep these changes since they're necessary for the runtime.

Actually wait, exa-js was already in package.json before my changes (per the original prompt). So the lockfile must have been out-of-sync on main. The bun install resolved it properly. I'll leave these changes.

All checks pass. Let me do a final summary.

Summary

Wired the existing web_search tool into the orchestrator and modernized it to take advantage of Exa SDK options (the installed exa-js resolved to 1.10.3 against the ^1.4.4 range). The tool now accepts category, livecrawl, excludeDomains, includeText, excludeText, requests summary: { query } for token-efficient previews while keeping highlights as a fallback, and includes the author in the formatted output. Also fixed a pre-existing typecheck error in src/lib/ai/constants.ts (line 77) where unescaped backticks inside the SYSTEM_PROMPT template literal broke parsing — escaping them was necessary for typecheck to pass on this branch. Added unit tests at src/lib/ai/tools/search/index.test.ts mocking the exa-js default export class, and updated BASE_TOOLS in orchestrator.test.ts to include web_search. Verified with bun run typecheck, bun run lint, bun run test, bun run format — all green.

Test Plan

• bun run typecheck — passes (after escaping backticks on the pre-existing prompt line).
• bun run lint — passes.
• bun run test — passes; new file src/lib/ai/tools/search/index.test.ts covers: formatted success output (title/url/summary/author/highlights fallback), empty results returning "No results found.", SDK error returning "Web search failed: …", and forwarding of category + livecrawl (plus include/exclude domains/text and summary: { query }) to searchAndContents.
• bun run format — passes.

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Project	Deployment	Actions	Updated (UTC)
wack-hacker	Error		May 2, 2026 9:26pm

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.05%. Comparing base (91987df) to head (ee1d1e5).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #127   +/-   ##
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  Coverage   99.05%   99.05%           
=======================================
  Files          62       62           
  Lines        1486     1486           
  Branches      350      350           
=======================================
  Hits         1472     1472           
  Misses          9        9           
  Partials        5        5           

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