chore: add SessionStart hook for Claude Code on the web (#27)

Pre-fetches Go modules and warms the build/test caches when a remote
Claude Code session starts, so linters and unit tests can run without
extra setup. Gated on CLAUDE_CODE_REMOTE=true so it is a no-op locally.

https://claude.ai/code/session_01PeXAW2DA8BnTmFvStfNmWn

Co-authored-by: Claude <noreply@anthropic.com>

Author: fullstackjam

.claude/hooks/session-start.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+set -euo pipefail
+
+# Only run in Claude Code on the web; skip on local machines.
+if [ "${CLAUDE_CODE_REMOTE:-}" != "true" ]; then
+  exit 0
+fi
+
+cd "${CLAUDE_PROJECT_DIR:-$(pwd)}"
+
+echo "[openboot session-start] Go version: $(go version)"
+
+# Pre-fetch and verify Go module deps so tests/builds are fast and offline-safe.
+echo "[openboot session-start] Downloading Go modules..."
+go mod download
+
+# Warm the build cache so the first `go build` / `go test` is fast.
+echo "[openboot session-start] Warming build cache (go build ./...)..."
+go build ./... >/dev/null
+
+# Warm the test binary cache without executing tests.
+echo "[openboot session-start] Warming test cache (go test -count=0 ./...)..."
+go test -count=0 ./... >/dev/null
+
+echo "[openboot session-start] Done."

.claude/settings.json

@@ -0,0 +1,14 @@
+{
+  "hooks": {
+    "SessionStart": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/session-start.sh"
+          }
+        ]
+      }
+    ]
+  }
+}

.gitignore

@@ -30,7 +30,10 @@ __pycache__/
 
 # Work tracking (internal)
 .sisyphus/
-.claude/
+.claude/*
+!.claude/hooks/
+!.claude/settings.json
+.claude/settings.local.json
 
 # Go vendor (deps downloaded at build time)
 vendor/