fix(triage): count builds from origin/code/cash and load .env.local for the event fetch

.claude/skills/build-lookup/SKILL.md

@@ -32,6 +32,10 @@ Run the helper script:
 bash .claude/skills/build-lookup/scripts/build-lookup.sh <versionCode>
 ```
 
+The script fetches and counts from `origin/code/cash`, the branch builds are cut
+from, so a stale or detached local checkout does not matter. Pass `--ref <ref>`
+to count from another ref.
+
 The script emits JSON:
 
 ```json

.claude/skills/build-lookup/scripts/build-lookup.sh

@@ -5,32 +5,49 @@
 # apps/flipcash/app/build.gradle.kts:20-25). versionCode N = the Nth commit
 # from the root of the repo.
 #
+# Builds are cut from code/cash, so commits are counted from origin/code/cash
+# (fetched first), not from the local HEAD, which may be behind or on another
+# branch.
+#
 # Usage:
 #   ./build-lookup.sh <versionCode>
 #   ./build-lookup.sh 3797
+#   ./build-lookup.sh 3797 --ref <ref>   # count from another ref
 #
 # Output: JSON with commit_sha, commit_short, commit_message, and (if found)
 #         the GitHub Actions run ID and URL for the Flipcash2 workflow.
 
 set -euo pipefail
 
 if [[ $# -lt 1 ]]; then
-  echo "Usage: build-lookup.sh <versionCode>" >&2
+  echo "Usage: build-lookup.sh <versionCode> [--ref <ref>]" >&2
   exit 1
 fi
 
-VERSION_CODE="$1"
+VERSION_CODE="$1"; shift
+REF="origin/code/cash"
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --ref) REF="$2"; shift 2 ;;
+    *) echo "Unknown argument: $1" >&2; exit 1 ;;
+  esac
+done
+
+if [[ "$REF" == "origin/code/cash" ]]; then
+  git fetch --quiet origin code/cash 2>/dev/null \
+    || echo "WARN: could not fetch origin/code/cash; using the local copy" >&2
+fi
 WORKFLOW_ID="229420296"  # "Flipcash2 Build and Deploy"
 
 # ── Resolve versionCode to commit ───────────────────────────────────
 # versionCode = git rev-list --count HEAD at the time of build.
-# The Nth commit (1-indexed from root) is at position N in `git rev-list --reverse HEAD`.
-# Equivalently: git rev-list HEAD | sed -n '<offset>p' where offset = total - N + 1.
+# The Nth commit (1-indexed from root) is at position N in `git rev-list --reverse $REF`.
+# Equivalently: git rev-list $REF | sed -n '<offset>p' where offset = total - N + 1.
 
-TOTAL=$(git rev-list --count HEAD)
+TOTAL=$(git rev-list --count "$REF")
 
 if (( VERSION_CODE > TOTAL )); then
-  echo "ERROR: versionCode $VERSION_CODE exceeds current commit count ($TOTAL)" >&2
+  echo "ERROR: versionCode $VERSION_CODE exceeds the commit count of $REF ($TOTAL)" >&2
   exit 1
 fi
 
@@ -40,7 +57,13 @@ if (( VERSION_CODE < 1 )); then
 fi
 
 OFFSET=$(( TOTAL - VERSION_CODE + 1 ))
-COMMIT_SHA=$(git rev-list HEAD | sed -n "${OFFSET}p")
+COMMIT_SHA=$(git rev-list "$REF" | sed -n "${OFFSET}p")
+
+# The offset assumes linear history. Confirm the commit really is the Nth.
+if [[ "$(git rev-list --count "$COMMIT_SHA")" != "$VERSION_CODE" ]]; then
+  echo "ERROR: commit ${COMMIT_SHA:0:9} on $REF has $(git rev-list --count "$COMMIT_SHA") ancestors, not $VERSION_CODE (non-linear history?)" >&2
+  exit 1
+fi
 COMMIT_SHORT="${COMMIT_SHA:0:9}"
 COMMIT_MESSAGE=$(git log -1 --format='%s' "$COMMIT_SHA")
 COMMIT_DATE=$(git log -1 --format='%aI' "$COMMIT_SHA")

.claude/skills/triage/SKILL.md

@@ -64,7 +64,13 @@ If the script exits non-zero, stop and report the error to the user.
 ## Step 2 — Pull event detail
 
 Fetch `event_url` (include header `Authorization: token $BUGSNAG_TOKEN`).
-Source `.env` from the repo root if the variable is not already set.
+The token lives in `.env` or `.env.local` at the repo root, as the script reads
+it; load both in the same shell as the request:
+
+```bash
+set -a; [ -f .env ] && . ./.env; [ -f .env.local ] && . ./.env.local; set +a
+curl -s -H "Authorization: token $BUGSNAG_TOKEN" "<event_url>"
+```
 
 Parse the response using the event shape documented in
 `.claude/skills/triage/references/event-shape.md`.