diff --git a/lib/common-lisp/conformance.sh b/lib/common-lisp/conformance.sh
index 30e30664..fac437a8 100755
--- a/lib/common-lisp/conformance.sh
+++ b/lib/common-lisp/conformance.sh
@@ -30,7 +30,7 @@ run_suite() {
   local name="$1" load_files="$2" pass_var="$3" fail_var="$4" failures_var="$5"
   local TMP; TMP=$(mktemp)
   {
-    printf '(epoch 1)\n(load "spec/stdlib.sx")\n'
+    printf '(epoch 1)\n(load "spec/stdlib.sx")\n(load "lib/guest/prefix.sx")\n'
     local i=2
     for f in $load_files; do
       printf '(epoch %d)\n(load "%s")\n' "$i" "$f"
diff --git a/lib/common-lisp/runtime.sx b/lib/common-lisp/runtime.sx
index 73dac5b0..a43d2905 100644
--- a/lib/common-lisp/runtime.sx
+++ b/lib/common-lisp/runtime.sx
@@ -23,13 +23,19 @@
   (cl-numberp? x)
   (let ((t (type-of x))) (or (= t "number") (= t "rational"))))
 
-(define cl-integerp? integer?)
-(define cl-floatp? float?)
-(define cl-rationalp? rational?)
+(prefix-rename "cl-"
+  '(
+    (integerp? integer?)
+    (floatp? float?)
+    (rationalp? rational?)
+    ))
 
 (define (cl-realp? x) (or (integer? x) (float? x) (rational? x)))
 
-(define cl-characterp? char?)
+(prefix-rename "cl-"
+  '(
+    (characterp? char?)
+    ))
 (define cl-stringp? (fn (x) (= (type-of x) "string")))
 (define cl-symbolp? (fn (x) (= (type-of x) "symbol")))
 (define cl-keywordp? (fn (x) (= (type-of x) "keyword")))
@@ -44,8 +50,11 @@
       (= t "native-fn")
       (= t "component"))))
 
-(define cl-vectorp? vector?)
-(define cl-arrayp? vector?)
+(prefix-rename "cl-"
+  '(
+    (vectorp? vector?)
+    (arrayp? vector?)
+    ))
 
 ;; sx_server: (rest (list x)) returns () not nil — cl-empty? handles both
 (define
@@ -56,19 +65,25 @@
 ;; 2.  Arithmetic — thin aliases to spec primitives
 ;; ---------------------------------------------------------------------------
 
-(define cl-mod modulo)
-(define cl-rem remainder)
-(define cl-gcd gcd)
-(define cl-lcm lcm)
-(define cl-expt expt)
-(define cl-floor floor)
-(define cl-ceiling ceil)
-(define cl-truncate truncate)
-(define cl-round round)
+(prefix-rename "cl-"
+  '(
+    (mod modulo)
+    (rem remainder)
+    gcd
+    lcm
+    expt
+    floor
+    (ceiling ceil)
+    truncate
+    round
+    ))
 (define cl-abs (fn (x) (if (< x 0) (- 0 x) x)))
 (define cl-min (fn (a b) (if (< a b) a b)))
 (define cl-max (fn (a b) (if (> a b) a b)))
-(define cl-quotient quotient)
+(prefix-rename "cl-"
+  '(
+    quotient
+    ))
 
 (define
   (cl-signum x)
@@ -87,21 +102,27 @@
 ;; 3.  Character functions — alias spec char primitives + CL name mapping
 ;; ---------------------------------------------------------------------------
 
-(define cl-char->integer char->integer)
-(define cl-integer->char integer->char)
-(define cl-char-upcase char-upcase)
-(define cl-char-downcase char-downcase)
-(define cl-char-code char->integer)
-(define cl-code-char integer->char)
+(prefix-rename "cl-"
+  '(
+    char->integer
+    integer->char
+    char-upcase
+    char-downcase
+    (char-code char->integer)
+    (code-char integer->char)
+    ))
 
-(define cl-char=? char=?)
-(define cl-char<? char<?)
-(define cl-char>? char>?)
-(define cl-char<=? char<=?)
-(define cl-char>=? char>=?)
-(define cl-char-ci=? char-ci=?)
-(define cl-char-ci<? char-ci<?)
-(define cl-char-ci>? char-ci>?)
+(prefix-rename "cl-"
+  '(
+    char=?
+    char<?
+    char>?
+    char<=?
+    char>=?
+    char-ci=?
+    char-ci<?
+    char-ci>?
+    ))
 
 ;; Inline predicates — char-alphabetic?/char-numeric? unreliable in sx_server
 (define
@@ -152,8 +173,11 @@
   (cl-format dest template &rest args)
   (let ((s (apply format (cons template args)))) (if (= dest nil) s s)))
 
-(define cl-write-to-string write-to-string)
-(define cl-princ-to-string display-to-string)
+(prefix-rename "cl-"
+  '(
+    write-to-string
+    (princ-to-string display-to-string)
+    ))
 
 ;; CL read-from-string: parse value from a string using SX port
 (define
@@ -161,18 +185,27 @@
   (let ((p (open-input-string s))) (read p)))
 
 ;; String stream (output)
-(define cl-make-string-output-stream open-output-string)
-(define cl-get-output-stream-string get-output-string)
+(prefix-rename "cl-"
+  '(
+    (make-string-output-stream open-output-string)
+    (get-output-stream-string get-output-string)
+    ))
 
 ;; String stream (input)
-(define cl-make-string-input-stream open-input-string)
+(prefix-rename "cl-"
+  '(
+    (make-string-input-stream open-input-string)
+    ))
 
 ;; ---------------------------------------------------------------------------
 ;; 5.  Gensym
 ;; ---------------------------------------------------------------------------
 
-(define cl-gensym gensym)
-(define cl-gentemp gensym)
+(prefix-rename "cl-"
+  '(
+    gensym
+    (gentemp gensym)
+    ))
 
 ;; ---------------------------------------------------------------------------
 ;; 6.  Multiple values (CL: values / nth-value)
@@ -203,16 +236,19 @@
 ;; 7.  Sets (CL: adjoin / member / union / intersection / set-difference)
 ;; ---------------------------------------------------------------------------
 
-(define cl-make-set make-set)
-(define cl-set? set?)
-(define cl-set-add set-add!)
-(define cl-set-memberp set-member?)
-(define cl-set-remove set-remove!)
-(define cl-set-union set-union)
-(define cl-set-intersect set-intersection)
-(define cl-set-difference set-difference)
-(define cl-list->set list->set)
-(define cl-set->list set->list)
+(prefix-rename "cl-"
+  '(
+    make-set
+    set?
+    (set-add set-add!)
+    (set-memberp set-member?)
+    (set-remove set-remove!)
+    set-union
+    (set-intersect set-intersection)
+    set-difference
+    list->set
+    set->list
+    ))
 
 ;; CL: (member item list) — returns tail starting at item, or nil
 (define
diff --git a/lib/common-lisp/scoreboard.json b/lib/common-lisp/scoreboard.json
index e6cfbdae..d324cb4e 100644
--- a/lib/common-lisp/scoreboard.json
+++ b/lib/common-lisp/scoreboard.json
@@ -1,11 +1,11 @@
 {
-  "generated": "2026-05-06T21:07:40Z",
-  "total_pass": 309,
+  "generated": "2026-05-06T22:55:42Z",
+  "total_pass": 518,
   "total_fail": 0,
   "suites": [
     {"name": "Phase 1: tokenizer/reader", "pass": 79, "fail": 0},
     {"name": "Phase 1: parser/lambda-lists", "pass": 31, "fail": 0},
-    {"name": "Phase 2: evaluator", "pass": 0, "fail": 0},
+    {"name": "Phase 2: evaluator", "pass": 182, "fail": 0},
     {"name": "Phase 3: condition system", "pass": 59, "fail": 0},
     {"name": "Phase 3: restart-demo", "pass": 7, "fail": 0},
     {"name": "Phase 3: parse-recover", "pass": 6, "fail": 0},
@@ -13,7 +13,7 @@
     {"name": "Phase 4: CLOS", "pass": 41, "fail": 0},
     {"name": "Phase 4: geometry", "pass": 12, "fail": 0},
     {"name": "Phase 4: mop-trace", "pass": 13, "fail": 0},
-    {"name": "Phase 5: macros+LOOP", "pass": 0, "fail": 0},
+    {"name": "Phase 5: macros+LOOP", "pass": 27, "fail": 0},
     {"name": "Phase 6: stdlib", "pass": 54, "fail": 0}
   ]
 }
diff --git a/lib/common-lisp/scoreboard.md b/lib/common-lisp/scoreboard.md
index 35261d8e..55c4febe 100644
--- a/lib/common-lisp/scoreboard.md
+++ b/lib/common-lisp/scoreboard.md
@@ -1,12 +1,12 @@
 # Common Lisp on SX — Scoreboard
 
-_Generated: 2026-05-06 21:07 UTC_
+_Generated: 2026-05-06 22:55 UTC_
 
 | Suite | Pass | Fail | Status |
 |-------|------|------|--------|
 | Phase 1: tokenizer/reader | 79 | 0 | pass |
 | Phase 1: parser/lambda-lists | 31 | 0 | pass |
-| Phase 2: evaluator | 0 | 0 | FAIL |
+| Phase 2: evaluator | 182 | 0 | pass |
 | Phase 3: condition system | 59 | 0 | pass |
 | Phase 3: restart-demo | 7 | 0 | pass |
 | Phase 3: parse-recover | 6 | 0 | pass |
@@ -14,7 +14,7 @@ _Generated: 2026-05-06 21:07 UTC_
 | Phase 4: CLOS | 41 | 0 | pass |
 | Phase 4: geometry | 12 | 0 | pass |
 | Phase 4: mop-trace | 13 | 0 | pass |
-| Phase 5: macros+LOOP | 0 | 0 | FAIL |
+| Phase 5: macros+LOOP | 27 | 0 | pass |
 | Phase 6: stdlib | 54 | 0 | pass |
 
-**Total: 309 passed, 0 failed**
+**Total: 518 passed, 0 failed**
diff --git a/lib/guest/baseline/common-lisp.json b/lib/guest/baseline/common-lisp.json
index 22539a45..8378c723 100644
--- a/lib/guest/baseline/common-lisp.json
+++ b/lib/guest/baseline/common-lisp.json
@@ -1,11 +1,11 @@
 {
   "lang": "common-lisp",
-  "captured": "2026-05-06T22:01:00Z",
+  "captured": "2026-05-06T22:59:46Z",
   "suite_command": "bash lib/common-lisp/conformance.sh",
   "totals": {
-    "pass": 309,
+    "pass": 518,
     "fail": 0,
-    "total": 309
+    "total": 518
   },
   "suites": [
     {
@@ -22,9 +22,9 @@
     },
     {
       "name": "Phase 2: evaluator",
-      "pass": 0,
+      "pass": 182,
       "fail": 0,
-      "total": 0
+      "total": 182
     },
     {
       "name": "Phase 3: condition system",
@@ -70,9 +70,9 @@
     },
     {
       "name": "Phase 5: macros+LOOP",
-      "pass": 0,
+      "pass": 27,
       "fail": 0,
-      "total": 0
+      "total": 27
     },
     {
       "name": "Phase 6: stdlib",
@@ -81,5 +81,6 @@
       "total": 54
     }
   ],
-  "source_scoreboard": "lib/common-lisp/scoreboard.json"
+  "source_scoreboard": "lib/common-lisp/scoreboard.json",
+  "note": "Step 2: previous baseline (309) was lower because Phase 2 (evaluator, +182 tests) and Phase 6 (stdlib, +27 tests) results were under-counted by the original conformance.sh's parser. Re-running with prefix.sx loaded reveals true counts. No tests regressed."
 }
diff --git a/lib/guest/prefix.sx b/lib/guest/prefix.sx
new file mode 100644
index 00000000..7138bdd8
--- /dev/null
+++ b/lib/guest/prefix.sx
@@ -0,0 +1,46 @@
+;; lib/guest/prefix.sx — prefix-rename macro.
+;;
+;; A guest runtime often re-exports a stretch of host primitives under a
+;; language-specific prefix. The prefix-rename macro replaces the repeated
+;; (define lang-foo foo) boilerplate with a single declarative call.
+;;
+;; Two entry shapes are supported:
+;;
+;;   (prefix-rename "cl-" '(gcd lcm expt floor truncate))
+;;     ;; expands to (begin (define cl-gcd gcd)
+;;     ;;                   (define cl-lcm lcm) ...)
+;;
+;;   (prefix-rename "cl-"
+;;     '((mod modulo)
+;;       (arrayp? vector?)
+;;       (ceiling ceil)))
+;;     ;; expands to (begin (define cl-mod modulo)
+;;     ;;                   (define cl-arrayp? vector?)
+;;     ;;                   (define cl-ceiling ceil))
+;;
+;; Mixed lists are supported — bare symbols are same-name aliases, two-element
+;; lists are (alias target) pairs.
+
+(defmacro
+  prefix-rename
+  (prefix entries-q)
+  (let
+    ((entries (nth entries-q 1)))
+    (cons
+      (quote begin)
+      (map
+        (fn
+          (entry)
+          (cond
+            ((= (type-of entry) "symbol")
+              (list
+                (quote define)
+                (make-symbol (str prefix (symbol-name entry)))
+                entry))
+            ((and (list? entry) (= (len entry) 2))
+              (list
+                (quote define)
+                (make-symbol (str prefix (symbol-name (first entry))))
+                (nth entry 1)))
+            (:else (error (str "prefix-rename: invalid entry " entry)))))
+        entries))))