diff --git a/.changeset/steady-outline-marker.md b/.changeset/steady-outline-marker.md
new file mode 100644
index 000000000..90154b4a1
--- /dev/null
+++ b/.changeset/steady-outline-marker.md
@@ -0,0 +1,5 @@
+---
+type: Fixed
+pr: 4125
+---
+**`/gsd-plan-phase --chunked`'s outline resume-check no longer has a syntax error** — the `### 8.5.1 Outline Phase` step's resume-detection block had an empty `then` clause (only a comment, no command), which is invalid under both bash and zsh if executed literally. (#4113)
diff --git a/gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md b/gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md
index f9bedc439..163a7ed1f 100644
--- a/gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md
+++ b/gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md
@@ -17,7 +17,7 @@ the `## OUTLINE COMPLETE` marker (written by the outline agent — #2762), skip
 ```bash
 OUTLINE_FILE="${PHASE_DIR}/${PADDED_PHASE}-PLAN-OUTLINE.md"
 if [[ -f "$OUTLINE_FILE" ]] && grep -q "^## OUTLINE COMPLETE" "$OUTLINE_FILE"; then
-  # reuse existing outline — skip to 8.5.2
+  : # reuse existing outline — skip to 8.5.2
 fi
 ```
 
@@ -67,7 +67,7 @@ For each plan entry extracted from `PLAN-OUTLINE.md`:
    ```bash
    PLAN_FILE="${PHASE_DIR}/${plan_id}-PLAN.md"
    if [[ -f "$PLAN_FILE" ]] && head -1 "$PLAN_FILE" | grep -q '^---' && [[ "$ARGUMENTS" != *"--reviews"* ]]; then
-     continue  # resume safety — NOT under --reviews (replan)
+     : # resume safety — skip this plan, continue to next plan entry — NOT under --reviews (replan)
    fi
    ```
 
diff --git a/scripts/lint-workflow-shellcheck-baseline.json b/scripts/lint-workflow-shellcheck-baseline.json
index bd0fb65c3..778dbeb4d 100644
--- a/scripts/lint-workflow-shellcheck-baseline.json
+++ b/scripts/lint-workflow-shellcheck-baseline.json
@@ -629,31 +629,6 @@
     "code": "2235",
     "message": "Use { ..; } instead of (..) to avoid subshell overhead."
   },
-  {
-    "file": "gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md",
-    "code": "1009",
-    "message": "The mentioned syntax error was in this if expression."
-  },
-  {
-    "file": "gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md",
-    "code": "1048",
-    "message": "Can't have empty then clauses (use 'true' as a no-op)."
-  },
-  {
-    "file": "gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md",
-    "code": "1072",
-    "message": "Unexpected keyword/token. Fix any mentioned problems and try again."
-  },
-  {
-    "file": "gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md",
-    "code": "1073",
-    "message": "Couldn't parse this then clause. Fix to allow more checks."
-  },
-  {
-    "file": "gsd-core/workflows/plan-phase/steps/chunked-planning-mode.md",
-    "code": "2105",
-    "message": "continue is only valid in loops."
-  },
   {
     "file": "gsd-core/workflows/plan-phase/steps/stall-detection-helpers.md",
     "code": "2086",