feat: add agent selector to UI and support direct agent assignment

- Added an agent selector (Auto, Claude, Gemini) to the Start Next Task button.
- Updated the backend to pass query parameters as environment variables to scripts.
- Modified the executor pool to skip classification when a specific agent is requested.
- Added --agent flag to claudomator start command.
- Updated tests to cover the new functionality.

1 files changed, 19 insertions, 2 deletions

diff --git a/web/test/start-next-task.test.mjs b/web/test/start-next-task.test.mjs
index 6863f7e..eaf3087 100644
--- a/web/test/start-next-task.test.mjs
+++ b/web/test/start-next-task.test.mjs
@@ -9,8 +9,11 @@ import assert from 'node:assert/strict';
 // Returns {output, exit_code} on HTTP 2xx
 // Throws on HTTP error
 
-async function startNextTask(basePath, fetchFn) {
-  const res = await fetchFn(`${basePath}/api/scripts/start-next-task`, { method: 'POST' });
+async function startNextTask(basePath, fetchFn, agent) {
+  const url = agent && agent !== 'auto'
+    ? `${basePath}/api/scripts/start-next-task?agent=${agent}`
+    : `${basePath}/api/scripts/start-next-task`;
+  const res = await fetchFn(url, { method: 'POST' });
   if (!res.ok) {
     let msg = `HTTP ${res.status}`;
     try { const body = await res.json(); msg = body.error || msg; } catch {}
@@ -35,6 +38,20 @@ describe('startNextTask', () => {
     assert.equal(captured.opts.method, 'POST');
   });
 
+  it('appends agent as query parameter when provided', async () => {
+    let captured = null;
+    const mockFetch = (url, opts) => {
+      captured = { url, opts };
+      return Promise.resolve({
+        ok: true,
+        json: () => Promise.resolve({ output: 'claudomator start --agent claude abc-123\n', exit_code: 0 }),
+      });
+    };
+
+    await startNextTask('http://localhost:8484', mockFetch, 'claude');
+    assert.equal(captured.url, 'http://localhost:8484/api/scripts/start-next-task?agent=claude');
+  });
+
   it('returns output and exit_code on success', async () => {
     const mockFetch = () => Promise.resolve({
       ok: true,