fix: resolve YAML syntax error in OpenCode AI PR review workflow

Fixes the heredoc syntax issue that was causing workflow validation failures.
Replaced problematic heredoc with jq-based JSON construction for proper
escaping of special characters in PR diff and comments.

Changes:
- workflows/opencode/pr/opencode-pr.yml: Use jq to build API payload
- workflows/opencode/pr/opencode-pr-nix.yml: Same fix for Nix variant
- .github/workflows/opencode-pr.yml: Apply fix to installed workflow

This resolves the "Invalid workflow file" error that prevented the
OpenCode AI PR review from running.

Author: MichaelFisher1997

.github/workflows/opencode-pr.yml

@@ -67,41 +67,25 @@ jobs:
           # Read the diff file
           DIFF_CONTENT=$(cat "$PR_DIFF")
           
-          # Create the review prompt
-          PROMPT=$(cat <<EOF
-You are an expert code reviewer. Review the following pull request:
-
-Title: $PR_TITLE
-Description: $PR_DESCRIPTION
-
-Previous Review Context:
-$PREVIOUS_COMMENTS
-
-Code Changes:
-\`\`\`diff
-$DIFF_CONTENT
-\`\`\`
-
-Provide a structured review with:
-1. Overall assessment (merge-ready, needs changes, etc.)
-2. Critical issues (if any)
-3. High-priority improvements
-4. Medium-priority suggestions
-5. Low-priority nitpicks
-6. Confidence score (0-100)
-
-Format as markdown with clear headers.
-EOF
-)
+          # Build prompt using jq
+          jq -n \
+            --arg title "$PR_TITLE" \
+            --arg desc "$PR_DESCRIPTION" \
+            --arg previous "$PREVIOUS_COMMENTS" \
+            --arg diff "$DIFF_CONTENT" \
+            '{
+              model: "kimi-latest",
+              messages: [{
+                role: "user",
+                content: "You are an expert code reviewer. Review the following pull request:\n\nTitle: \($title)\n\nDescription: \($desc)\n\nPrevious Review Context:\n\($previous)\n\nCode Changes:\n\`\`\`diff\n\($diff)\n\`\`\`\n\nProvide a structured review with:\n1. Overall assessment (merge-ready, needs changes, etc.)\n2. Critical issues (if any)\n3. High-priority improvements\n4. Medium-priority suggestions\n5. Low-priority nitpicks\n6. Confidence score (0-100)\n\nFormat as markdown with clear headers."
+              }]
+            }' > prompt.json
           
           # Call OpenCode AI API
           curl -X POST https://api.opencode.ai/v1/chat/completions \
             -H "Authorization: Bearer $KIMI_API_KEY" \
             -H "Content-Type: application/json" \
-            -d "{
-              \"model\": \"kimi-latest\",
-              \"messages\": [{\"role\": \"user\", \"content\": $(echo "$PROMPT" | jq -Rs .)}]
-            }" > review_response.json
+            -d @prompt.json > review_response.json
           
           # Extract and post review
           REVIEW_TEXT=$(cat review_response.json | jq -r '.choices[0].message.content')

workflows/opencode/pr/opencode-pr-nix.yml

@@ -73,44 +73,31 @@ jobs:
       - name: Run OpenCode AI Review
         env:
           KIMI_API_KEY: ${{ secrets.KIMI_API_KEY }}
+          PR_TITLE: ${{ github.event.pull_request.title }}
+          PR_DESCRIPTION: ${{ github.event.pull_request.body }}
+          PREVIOUS_COMMENTS: ${{ steps.previous-comments.outputs.result }}
         run: |
           nix develop --command bash -c '
             DIFF_CONTENT=$(cat pr_diff.txt)
-            PREVIOUS_COMMENTS="${{ steps.previous-comments.outputs.result }}"
             
-            PROMPT=$(cat <<EOF
-You are an expert code reviewer. Review the following pull request:
-
-Title: ${{ github.event.pull_request.title }}
-Description: ${{ github.event.pull_request.body }}
-
-Previous Review Context:
-$PREVIOUS_COMMENTS
-
-Code Changes:
-\`\`\`diff
-$DIFF_CONTENT
-\`\`\`
-
-Provide a structured review with:
-1. Overall assessment (merge-ready, needs changes, etc.)
-2. Critical issues (if any)
-3. High-priority improvements
-4. Medium-priority suggestions
-5. Low-priority nitpicks
-6. Confidence score (0-100)
-
-Format as markdown with clear headers.
-EOF
-)
+            # Build prompt using jq
+            jq -n \
+              --arg title "$PR_TITLE" \
+              --arg desc "$PR_DESCRIPTION" \
+              --arg previous "$PREVIOUS_COMMENTS" \
+              --arg diff "$DIFF_CONTENT" \
+              \'{
+                model: "kimi-latest",
+                messages: [{
+                  role: "user",
+                  content: "You are an expert code reviewer. Review the following pull request:\n\nTitle: \($title)\n\nDescription: \($desc)\n\nPrevious Review Context:\n\($previous)\n\nCode Changes:\n\`\`\`diff\n\($diff)\n\`\`\`\n\nProvide a structured review with:\n1. Overall assessment (merge-ready, needs changes, etc.)\n2. Critical issues (if any)\n3. High-priority improvements\n4. Medium-priority suggestions\n5. Low-priority nitpicks\n6. Confidence score (0-100)\n\nFormat as markdown with clear headers."
+                }]
+              }\' > prompt.json
             
             curl -X POST https://api.opencode.ai/v1/chat/completions \
               -H "Authorization: Bearer $KIMI_API_KEY" \
               -H "Content-Type: application/json" \
-              -d "{
-                \"model\": \"kimi-latest\",
-                \"messages\": [{\"role\": \"user\", \"content\": $(echo "$PROMPT" | jq -Rs .)}]
-              }" > review_response.json
+              -d @prompt.json > review_response.json
             
             cat review_response.json | jq -r ".choices[0].message.content" > review_output.txt
           '

workflows/opencode/pr/opencode-pr.yml

@@ -67,41 +67,25 @@ jobs:
           # Read the diff file
           DIFF_CONTENT=$(cat "$PR_DIFF")
           
-          # Create the review prompt
-          PROMPT=$(cat <<EOF
-You are an expert code reviewer. Review the following pull request:
-
-Title: $PR_TITLE
-Description: $PR_DESCRIPTION
-
-Previous Review Context:
-$PREVIOUS_COMMENTS
-
-Code Changes:
-\`\`\`diff
-$DIFF_CONTENT
-\`\`\`
-
-Provide a structured review with:
-1. Overall assessment (merge-ready, needs changes, etc.)
-2. Critical issues (if any)
-3. High-priority improvements
-4. Medium-priority suggestions
-5. Low-priority nitpicks
-6. Confidence score (0-100)
-
-Format as markdown with clear headers.
-EOF
-)
+          # Build prompt using jq
+          jq -n \
+            --arg title "$PR_TITLE" \
+            --arg desc "$PR_DESCRIPTION" \
+            --arg previous "$PREVIOUS_COMMENTS" \
+            --arg diff "$DIFF_CONTENT" \
+            '{
+              model: "kimi-latest",
+              messages: [{
+                role: "user",
+                content: "You are an expert code reviewer. Review the following pull request:\n\nTitle: \($title)\n\nDescription: \($desc)\n\nPrevious Review Context:\n\($previous)\n\nCode Changes:\n\`\`\`diff\n\($diff)\n\`\`\`\n\nProvide a structured review with:\n1. Overall assessment (merge-ready, needs changes, etc.)\n2. Critical issues (if any)\n3. High-priority improvements\n4. Medium-priority suggestions\n5. Low-priority nitpicks\n6. Confidence score (0-100)\n\nFormat as markdown with clear headers."
+              }]
+            }' > prompt.json
           
           # Call OpenCode AI API
           curl -X POST https://api.opencode.ai/v1/chat/completions \
             -H "Authorization: Bearer $KIMI_API_KEY" \
             -H "Content-Type: application/json" \
-            -d "{
-              \"model\": \"kimi-latest\",
-              \"messages\": [{\"role\": \"user\", \"content\": $(echo "$PROMPT" | jq -Rs .)}]
-            }" > review_response.json
+            -d @prompt.json > review_response.json
           
           # Extract and post review
           REVIEW_TEXT=$(cat review_response.json | jq -r '.choices[0].message.content')