Plane client, transports and executor adapters

Plane: paginated issue/comment/state/label/member access, one client per
terminal identity. Transports: local (setsid-detached runner) and warpgate-ssh
(win10-ps.sh / win10-put.sh relay, schtasks launch, taskkill on timeout).
Executors share a runner shape (prompt.md, exit.txt marker) with codex,
claude-code and shell adapters for last message and thread id.

agentd/executors/claude_code.py

@@ -0,0 +1,38 @@
+"""Claude Code CLI: `claude -p --output-format json` with the prompt on stdin and cwd = repo;
+resume with `--resume <session_id>`. The JSON result carries `result` (last message) and `session_id`."""
+import json
+
+from .base import ExecResult, RunnerExecutor
+
+
+def parse_output(text):
+    """Return the result object from `--output-format json` output (whole text or its last JSON line)."""
+    text = (text or "").strip()
+    candidates = [text] + list(reversed(text.splitlines()))
+    for c in candidates:
+        try:
+            obj = json.loads(c)
+        except ValueError:
+            continue
+        if isinstance(obj, dict):
+            return obj
+        if isinstance(obj, list):  # stream-json style array: take the result event
+            res = [o for o in obj if isinstance(o, dict) and o.get("type") == "result"]
+            if res:
+                return res[-1]
+    return {}
+
+
+class ClaudeCodeExecutor(RunnerExecutor):
+    stdout_name = "out.json"
+
+    def collect(self, handle):
+        t, d = self.transport, handle["run_dir"]
+        obj = parse_output(t.read_text(t.join(d, "out.json")))
+        err = bool(obj.get("is_error")) or obj.get("subtype", "success") != "success"
+        last = "" if err else (obj.get("result") or "")
+        tail = self.stderr_tail(handle)
+        if err:
+            tail = ("%s %s" % (obj.get("subtype", ""), str(obj.get("result", ""))[:400]) + "\n" + tail).strip()
+        return ExecResult(last.strip(), self.exit_code(handle), obj.get("session_id") or handle.get("thread_id"),
+                          self.logs(handle, "out.json", "stderr.txt"), tail)