Document dash0 experiment workflow

AGENTS.md

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+# Project Operating Notes
+
+## Remote experiment host
+
+- Default experiment machine: `dash0`.
+- Hardware expectation: 8 NVIDIA H20 GPUs.
+- SSH check: use `ssh dash0` before scheduling or debugging remote runs.
+- Remote project path: `/home/admin/cpfs/wjh/aituner/aituner`.
+
+## Local/remote sync workflow
+
+- Treat this local repository and the `dash0` repository as the same project checkout.
+- Synchronize code through Git using `commit`, `push`, and `pull`.
+- For remote experiments, commit local changes, push to `origin`, then pull on `dash0` in `/home/admin/cpfs/wjh/aituner/aituner` before running.
+- Do not ask for the remote host or project path again unless the user explicitly changes them.