fix: PR title missing from crush review context (#52)

* fix: save PR title to /tmp before checkout so it survives actions/checkout

pr_data.json was written to the working directory but actions/checkout@v4
wipes it clean. The PR body survived because it was saved to /tmp/pr_body.txt,
but the title was read directly from the now-deleted pr_data.json.

Fix: save the title to /tmp/pr_title.txt (like the body) and read from there.
Co-Authored-By: unknown <>

* Fix comment + default CRUSH_SMALL_MODEL in crush workflow

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Greg Slepak <contact@taoeffect.com>

Author: devin-ai-integration[bot]

.github/workflows/pull-review-crush.yml

@@ -64,7 +64,7 @@ jobs:
         env:
           COMMENT_BODY: ${{ github.event.comment.body }}
         run: |
-          # Check for {{provider, model}} or {{provider, model, small_model}} override syntax at comment start
+          # Check for {{provider, model}} or {{provider, model, small_model}} override syntax after /crush or /crush_fast command
           if [[ "$COMMENT_BODY" =~ ^[[:space:]]*/crush(_fast)?[[:space:]]+\{\{[[:space:]]*([^,]+)[[:space:]]*,[[:space:]]*([^,}]+)[[:space:]]*(,[[:space:]]*([^}]+)[[:space:]]*)?\}\} ]]; then
             PROVIDER=$(echo "${BASH_REMATCH[2]}" | xargs)
             MODEL=$(echo "${BASH_REMATCH[3]}" | xargs)
@@ -124,6 +124,7 @@ jobs:
           case "$REVIEW_PROVIDER" in
             openrouter) echo "CRUSH_SMALL_MODEL=openrouter/$SMALL_MODEL" >> "$GITHUB_ENV" ;;
             zai-coding-plan) echo "CRUSH_SMALL_MODEL=zai/$SMALL_MODEL" >> "$GITHUB_ENV" ;;
+            *) echo "CRUSH_SMALL_MODEL=zai/glm-4.7" >> "$GITHUB_ENV" ;;
           esac
 
       - name: Get PR number
@@ -141,6 +142,7 @@ jobs:
             echo "base_ref=$(jq -r '.base.ref' pr_data.json)"
           } >> "$GITHUB_OUTPUT"
           jq -r '.body // ""' pr_data.json > /tmp/pr_body.txt
+          jq -r '.title // ""' pr_data.json > /tmp/pr_title.txt
 
       - name: Check for linked issue
         id: check-issue
@@ -218,7 +220,7 @@ jobs:
           ISSUE_NUMBER: ${{ steps.check-issue.outputs.issue_number }}
         run: |
           # Start with PR title
-          printf '<pr_title>\n%s\n</pr_title>\n' "$(jq -r '.title // ""' pr_data.json)" > /tmp/helpful_context.txt
+          printf '<pr_title>\n%s\n</pr_title>\n' "$(cat /tmp/pr_title.txt)" > /tmp/helpful_context.txt
 
           if [ "$HAS_ISSUE" = "true" ]; then
             # Fetch the issue