feat(claude): argo-deploy-helper skill (foxhunt)

Wraps scripts/argo-train.sh with deploy discipline pre-flight: push-before-
deploy gate, mandatory --mbp10-data-dir/--trades-data-dir, --per-enabled,
default L40S unless overridden, H100 max-utilization when chosen.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/skills/foxhunt/argo-deploy-helper/SKILL.md

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+---
+name: argo-deploy-helper
+description: Constructs and validates a vetted invocation of scripts/argo-train.sh or scripts/argo-compile-deploy.sh. Enforces push-before-deploy, default L40S pool (ci-training-l40s) unless overridden, mandatory --mbp10-data-dir + --trades-data-dir, --per-enabled, H100 max-utilization flags when H100 chosen. Use when deploying training to argo.
+---
+
+# Foxhunt Argo Deploy Helper
+
+Wraps the existing `scripts/argo-train.sh` and `scripts/argo-compile-deploy.sh` with foxhunt deploy discipline pre-flight.
+
+## When to invoke
+
+- "Deploy training X to argo".
+- "Run smoke for SP-N on the cluster".
+
+## Pre-flight checklist (BLOCK on any fail)
+
+Before constructing the invocation, run each check. If any fails, do not proceed — report the failure and stop.
+
+1. **Push before deploy** (`feedback_push_before_deploy.md`).
+   ```bash
+   LOCAL=$(git rev-parse HEAD)
+   REMOTE=$(git rev-parse @{u} 2>/dev/null || echo "")
+   if [ "$LOCAL" != "$REMOTE" ]; then
+     echo "BLOCKED: HEAD ($LOCAL) not pushed to upstream ($REMOTE). Run 'git push' first."
+     exit 1
+   fi
+   ```
+
+2. **MBP10 + trades data dirs mandatory for SP-chain training** (`feedback_mbp10_mandatory.md`).
+   - Confirm `--mbp10-data-dir` and `--trades-data-dir` are present in the proposed flag list.
+   - If absent, BLOCK and ask the user to provide them.
+
+3. **PER enabled** (`feedback_always_per.md`).
+   - Confirm `--per-enabled` is present (or that the script defaults it to true). PER is always on.
+
+## Default GPU pool (`feedback_default_to_l40s_pool.md`)
+
+Default to `--gpu-pool ci-training-l40s`. Add only if the user did not specify a pool. If the user specifies H100, also enforce H100 max-utilization flags (`feedback_h100_gpu.md`):
+
+- Hard error on under-utilization (script-side flags or env vars per the existing argo-train.sh contract).
+- Pass the canonical H100 batch-size + grad-accumulation flags.
+
+## What this skill produces
+
+A complete invocation, ready to run, in the form:
+
+```bash
+./scripts/argo-train.sh \
+  --branch <branch> \
+  --commit <sha> \
+  --gpu-pool <pool> \
+  --mbp10-data-dir <path> \
+  --trades-data-dir <path> \
+  --per-enabled \
+  <other flags>
+```
+
+Plus a one-line summary of the pre-flight checks that passed.
+
+## Anti-pattern this skill avoids
+
+- Deploying with HEAD ahead of upstream (un-pushed commits aren't reproducible from the remote).
+- H100 deploys without max-utilization flags (waste of expensive node).
+- Defaulting to H100 when L40S would do (`feedback_default_to_l40s_pool.md` overrides the older H100-by-default rule).
+- Layering Bash run_in_background Monitor on top of argo logs (`feedback_no_redundant_monitor.md`). Stream logs via `argo logs -f`, not via custom shell redirection.
+
+## After deploy
+
+Suggest invoking `foxhunt-smoke-pilot` to monitor the smoke and kill on first useful anomaly signal.