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+---
+description: Enable a remote experiment workflow by patching CLAUDE.md with a Remote Experiment Protocol. Performs remote preflight (mkdir + permission check). Does NOT run any experiments.
+allowed-tools:
+  [
+    Bash(pwd),
+    Bash(ls:*),
+    Bash(cat:*),
+    Bash(git rev-parse:*),
+    Bash(sed:*),
+    Bash(printf:*),
+    Bash(mkdir:*),
+    Bash(test:*),
+    Bash(ssh:*),
+    Bash(rsync:*),
+    Bash(scp:*)
+  ]
+---
+
+# /remote-exp <HOST> <PATH>
+# Purpose: Patch CLAUDE.md to enforce remote experiment workflow (review/edit locally, run experiments remotely).
+# This command sets up the protocol. It does NOT execute experiments.
+
+HOST: $1
+REMOTE_PATH: $2
+
+## Hard rules (STRICT)
+
+- Do NOT run any experiments in this command.
+- This command MAY perform remote preflight: connect via ssh, create REMOTE_PATH if missing, and verify write permission.
+- If remote directory creation or write permission check fails (permission, quota, etc.), STOP and report the failure reason to the user.
+- Patch CLAUDE.md in a deterministic way using BEGIN/END markers (idempotent).
+
+---
+
+## Step 1: Validate arguments
+
+- If $1 or $2 is missing, ask the user to provide:
+  - /remote-exp <HOST> <PATH>
+
+HOST parsing rule:
+- If HOST looks like "ip:port" (single ":" and port is numeric), then use:
+  - ssh -p <port> <ip>
+  - rsync/scp using "-e 'ssh -p <port>'"
+- Otherwise use:
+  - ssh <HOST>
+  - rsync/scp using "-e ssh"
+
+---
+
+## Step 2: Locate repo root and CLAUDE.md
+
+- Determine repo root via:
+  - git rev-parse --show-toplevel
+- Ensure CLAUDE.md exists at repo root; if missing, create it with a minimal header.
+
+---
+
+## Step 3: Remote preflight (no experiments)
+
+- Connect to remote (ssh) and ensure REMOTE_PATH exists:
+  - mkdir -p "<REMOTE_PATH>"
+- Check write permission:
+  - test -w "<REMOTE_PATH>"
+- If any step fails, STOP and show the exact ssh command used + the stderr reason.
+
+---
+
+## Step 4: Initial sync (code only; still no experiments)
+
+- Sync local repo to remote REMOTE_PATH using rsync (preferred) or scp fallback.
+- Exclude:
+  - .git
+  - cc-gen-script/
+  - cc-gen-doc/
+  - common build artifacts (node_modules, dist, build, __pycache__, .venv, .pytest_cache)
+- If rsync is unavailable, fall back to scp (note: scp is slower and may not support excludes; if so, warn and STOP unless the user approves).
+
+---
+
+## Step 5: Patch CLAUDE.md (idempotent)
+
+Insert or replace the following block in CLAUDE.md using markers:
+
+<!-- BEGIN REMOTE-EXP -->
+...block...
+<!-- END REMOTE-EXP -->
+
+The block must include:
+- the resolved HOST and REMOTE_PATH
+- the ssh/rsync command templates (with or without -p)
+- the workflow rules:
+  - review & edit locally
+  - sync to remote before running any heavy experiment
+  - run experiments only on remote
+  - pull back results/artifacts/logs to local after experiment
+  - if remote mkdir/write fails: stop and report
+  - keep changes visible locally for user review
+
+After patching, print a short summary in chat (what changed, where the protocol lives, and the exact remote target).
+
+---
+
+## Remote Experiment Protocol block (write exactly into CLAUDE.md)
+
+Use the commands computed from HOST parsing:
+
+- SSH_CMD
+- RSYNC_SSH
+- RSYNC_CMD
+
+The block to insert:
+
+(1) A clear heading
+(2) Current remote target
+(3) Preflight checks
+(4) Sync rules
+(5) Results retrieval rules
+(6) Failure handling rules
+
+Do NOT include subjective strategy. Keep it operational and objective.