diff --git a/plugins/ultraplan-local/commands/trekexecute.md b/plugins/ultraplan-local/commands/trekexecute.md
index 7dccc24..d530763 100644
--- a/plugins/ultraplan-local/commands/trekexecute.md
+++ b/plugins/ultraplan-local/commands/trekexecute.md
@@ -558,13 +558,13 @@ if [ -f "${PROJECT_DIR}/architecture/overview.md" ]; then
   printf '\n\n---\n\n' >> "${SHARED_CONTEXT_FILE}"
   cat "${PROJECT_DIR}/architecture/overview.md" >> "${SHARED_CONTEXT_FILE}"
 fi
-MAX_TURNS="${ULTRAEXECUTE_MAX_TURNS:-50}"
-MAX_BUDGET_USD="${ULTRAEXECUTE_MAX_BUDGET_USD:-5}"
+MAX_TURNS="${TREKEXECUTE_MAX_TURNS:-50}"
+MAX_BUDGET_USD="${TREKEXECUTE_MAX_BUDGET_USD:-5}"
 ```
 
 The budget caps default to safe values for normal-length steps. Operators may
 override for long runs:
-`ULTRAEXECUTE_MAX_TURNS=120 ULTRAEXECUTE_MAX_BUDGET_USD=20 /ultraexecute-local --project ...`
+`TREKEXECUTE_MAX_TURNS=120 TREKEXECUTE_MAX_BUDGET_USD=20 /ultraexecute-local --project ...`
 
 **2a. Create worktrees for this wave's sessions:**
 
diff --git a/plugins/ultraplan-local/templates/headless-launch-template.md b/plugins/ultraplan-local/templates/headless-launch-template.md
index b532a31..79fa34c 100644
--- a/plugins/ultraplan-local/templates/headless-launch-template.md
+++ b/plugins/ultraplan-local/templates/headless-launch-template.md
@@ -29,8 +29,8 @@ export GIT_OPTIONAL_LOCKS=0
 
 # Per-child guardrails (operator may override via env). Match Phase 2.6
 # Step 2a-pre defaults.
-MAX_TURNS="${ULTRAEXECUTE_MAX_TURNS:-50}"
-MAX_BUDGET_USD="${ULTRAEXECUTE_MAX_BUDGET_USD:-5}"
+MAX_TURNS="${TREKEXECUTE_MAX_TURNS:-50}"
+MAX_BUDGET_USD="${TREKEXECUTE_MAX_BUDGET_USD:-5}"
 
 # Shared context (brief + architecture if present). Absolute path so child
 # sessions resolve it after `cd` into their worktree.
@@ -81,15 +81,15 @@ fi
 # Pre-flight: verify remote push permissions (catches credential/auth issues
 # BEFORE spawning sessions). Sub-agent bash sandbox may have different
 # credentials than the launching shell — Step 0 in each session spec handles
-# the sandbox-side detection. Set ULTRAEXECUTE_SKIP_PREFLIGHT=1 for offline
+# the sandbox-side detection. Set TREKEXECUTE_SKIP_PREFLIGHT=1 for offline
 # or air-gapped testing.
-if [ "${ULTRAEXECUTE_SKIP_PREFLIGHT:-0}" != "1" ]; then
+if [ "${TREKEXECUTE_SKIP_PREFLIGHT:-0}" != "1" ]; then
   if ! git push --dry-run origin HEAD >/tmp/push-dryrun-launch.log 2>&1; then
     echo "ERROR: git push --dry-run failed. Sessions will be unable to push."
     cat /tmp/push-dryrun-launch.log
     echo ""
     echo "Fix remote credentials before running parallel execution, or set"
-    echo "ULTRAEXECUTE_SKIP_PREFLIGHT=1 to bypass (offline/air-gapped only)."
+    echo "TREKEXECUTE_SKIP_PREFLIGHT=1 to bypass (offline/air-gapped only)."
     exit 1
   fi
   if grep -qE "(rejected|denied|forbidden|permission)" /tmp/push-dryrun-launch.log; then
diff --git a/plugins/ultraplan-local/templates/session-spec-template.md b/plugins/ultraplan-local/templates/session-spec-template.md
index c00df75..0c35b6d 100644
--- a/plugins/ultraplan-local/templates/session-spec-template.md
+++ b/plugins/ultraplan-local/templates/session-spec-template.md
@@ -72,7 +72,7 @@ session_manifest:
 ultraexecute-local marks the session `blocked` and does NOT proceed. This
 catches the fail-late push-denial mode observed in Wave 1.*
 
-*Escape hatch:* set `ULTRAEXECUTE_SKIP_PREFLIGHT=1` in the environment to
+*Escape hatch:* set `TREKEXECUTE_SKIP_PREFLIGHT=1` in the environment to
 bypass Step 0 (use only for offline/air-gapped testing).
 
 ### Step 1: {description}