docs(prompt): Precise Anchoring for inline comments (use line+side; avoid position) (#3)

* docs(prompt): add Precise Anchoring guidance to enforce line+side usage and avoid position; emphasize validation and suggestions anchoring

* Update templates/request/base.njk

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: mtpauly

templates/request/base.njk

@@ -35,6 +35,14 @@ You are conducting a comprehensive code review for PR #{{ pr.number }}. You have
 - Never use "REQUEST_CHANGES" or "APPROVE"
 - If no line-specific suggestions, post a general comment like "Review completed. No suggestions at this time."
 - Only a single review should be created, never multiple reviews
+
+### Precise Anchoring
+- Anchor using line + side; do not use "position".
+- Default: side="RIGHT" for added/modified lines; use "LEFT" only for deleted lines.
+- Validate anchors: only post an inline comment when you can ensure the anchor targets the intended code; otherwise post one brief general comment.
+- Suggestion blocks (```suggestion ... ``` ) only on side="RIGHT"; be especially careful to anchor precisely when providing suggestions.
+- For multi-line ranges, set start_line/start_side and line/side consistently (same side).
+
 **IMPORTANT**: If you post any review comments, end your review summary with this exact feedback request:
 
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