vm(hako): add v1 reader/dispatcher (flagged), commonize mir_call handler, share block scan; smokes: add v1 hakovm canary; docs: 20.37/20.38 plans, OOB policy; runner: v1 hakovm toggle; include SKIP summary

src/runner/modes/common_util/resolve/strip.rs

@@ -496,11 +496,38 @@ pub fn parse_preludes_to_asts(
                 eprintln!("[strip-debug] Parse FAILED for: {} (debug={})", prelude_path, debug);
                 if debug {
                     eprintln!("[strip-debug] Error: {}", e);
+                    let es = format!("{}", e);
                     let lines: Vec<&str> = clean_src.lines().collect();
                     eprintln!("[strip-debug] Total lines: {}", lines.len());
-                    eprintln!("[strip-debug] Lines 15-25:");
-                    for (idx, line) in lines.iter().enumerate().skip(14).take(11) {
-                        eprintln!("  {:3}: {}", idx + 1, line);
+                    // Try to extract error line number (e.g., "at line 451") and show local context
+                    let mut printed = false;
+                    if let Some(pos) = es.rfind("line ") {
+                        let mut j = pos + 5; // after "line "
+                        let bytes = es.as_bytes();
+                        let mut n: usize = 0; let mut had = false;
+                        while j < bytes.len() {
+                            let c = bytes[j];
+                            if c >= b'0' && c <= b'9' { n = n * 10 + (c - b'0') as usize; j += 1; had = true; } else { break; }
+                        }
+                        if had {
+                            let ln = if n == 0 { 1 } else { n };
+                            let from = ln.saturating_sub(3);
+                            let to = std::cmp::min(lines.len(), ln + 3);
+                            eprintln!("[strip-debug] Context around line {} ({}..={}):", ln, from.max(1), to);
+                            for i in from.max(1)..=to {
+                                let mark = if i == ln { ">>" } else { "  " };
+                                if let Some(line) = lines.get(i-1) {
+                                    eprintln!("{} {:4}: {}", mark, i, line);
+                                }
+                            }
+                            printed = true;
+                        }
+                    }
+                    if !printed {
+                        eprintln!("[strip-debug] Lines 15-25:");
+                        for (idx, line) in lines.iter().enumerate().skip(14).take(11) {
+                            eprintln!("  {:3}: {}", idx + 1, line);
+                        }
                     }
                     eprintln!("[strip-debug] Full clean_src:\n{}\n---", clean_src);
                 }