diff --git a/conductor/tracks/send_result_to_send_20260616/plan.md b/conductor/tracks/send_result_to_send_20260616/plan.md
index fa758e60..08766839 100644
--- a/conductor/tracks/send_result_to_send_20260616/plan.md
+++ b/conductor/tracks/send_result_to_send_20260616/plan.md
@@ -49,19 +49,19 @@
 **Files:**
 - Modify: `src/ai_client.py:1-...` (10 refs throughout the file)
 
-### Task 1.1: Rename `send_result` → `send` in `src/ai_client.py`
+### Task 1.1: Rename `send_result` → `send` in `src/ai_client.py` [5351389]
 
-- [ ] **Step 1: Snapshot the pre-rename state**
+- [x] **Step 1: Snapshot the pre-rename state**
 
 Run: `uv run pytest 2>&1 | tail -3`
 Expected: a line like `=== X passed in Y.YYs ===` where X is the current passing count. Record this number mentally as the "before" baseline.
 
-- [ ] **Step 2: Identify all 10 references in `src/ai_client.py`**
+- [x] **Step 2: Identify all 10 references in `src/ai_client.py`**
 
 Run: `git grep -n "send_result" -- src/ai_client.py`
 Expected: 10 lines, all in `src/ai_client.py`. Each line shows the line number and the context.
 
-- [ ] **Step 3: Rename each reference**
+- [x] **Step 3: Rename each reference**
 
 For each of the 10 references:
 - `def send_result(` → `def send(`
@@ -75,12 +75,12 @@ Use the MCP edit tool. Verify the rename is complete:
 Run: `git grep "send_result" -- src/ai_client.py`
 Expected: 0 matches (the grep returns nothing).
 
-- [ ] **Step 4: Run the test suite — confirm the "red"**
+- [x] **Step 4: Run the test suite — confirm the "red"**
 
 Run: `uv run pytest 2>&1 | tail -10`
 Expected: many test failures with `AttributeError: module 'src.ai_client' has no attribute 'send_result'` (or `AttributeError: <module> has no attribute 'send_result'` from monkeypatch.setattr). This is the TDD red moment. **Do not panic; this is expected.**
 
-- [ ] **Step 5: Commit the red moment**
+- [x] **Step 5: Commit the red moment**
 
 ```bash
 git add src/ai_client.py
@@ -94,7 +94,7 @@ back to green.
 Refs: conductor/tracks/send_result_to_send_20260616/"
 ```
 
-- [ ] **Step 6: Attach the git note**
+- [x] **Step 6: Attach the git note**
 
 ```bash
 git notes add -m "Task 1.1: rename send_result to send in src/ai_client.py
diff --git a/scripts/tier2/update_plan_t1_1.py b/scripts/tier2/update_plan_t1_1.py
new file mode 100644
index 00000000..44642603
--- /dev/null
+++ b/scripts/tier2/update_plan_t1_1.py
@@ -0,0 +1,62 @@
+"""Update plan.md to mark Task 1.1 as complete with commit SHA 5351389."""
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+PLAN = Path("conductor/tracks/send_result_to_send_20260616/plan.md")
+SHA = "5351389"
+
+EDITS: list[tuple[str, str]] = [
+ (
+  "### Task 1.1: Rename `send_result` → `send` in `src/ai_client.py`\n\n- [ ] **Step 1: Snapshot the pre-rename state**",
+  f"### Task 1.1: Rename `send_result` → `send` in `src/ai_client.py` [{SHA}]\n\n- [x] **Step 1: Snapshot the pre-rename state**",
+ ),
+ (
+  "- [ ] **Step 2: Identify all 10 references in `src/ai_client.py`**",
+  "- [x] **Step 2: Identify all 10 references in `src/ai_client.py`**",
+ ),
+ (
+  "- [ ] **Step 3: Rename each reference**",
+  "- [x] **Step 3: Rename each reference**",
+ ),
+ (
+  "- [ ] **Step 4: Run the test suite — confirm the \"red\"**",
+  "- [x] **Step 4: Run the test suite — confirm the \"red\"**",
+ ),
+ (
+  "- [ ] **Step 5: Commit the red moment**",
+  "- [x] **Step 5: Commit the red moment**",
+ ),
+ (
+  "- [ ] **Step 6: Attach the git note**",
+  "- [x] **Step 6: Attach the git note**",
+ ),
+]
+
+
+def main() -> int:
+ with PLAN.open("r", encoding="utf-8", newline="") as f:
+  content = f.read()
+ has_crlf = "\r\n" in content
+ nl = "\r\n" if has_crlf else "\n"
+ normalized = [(o.replace("\n", nl), n.replace("\n", nl)) for o, n in EDITS]
+ new_content = content
+ applied = 0
+ for old, new in normalized:
+  if old in new_content:
+   new_content = new_content.replace(old, new, 1)
+   applied += 1
+  else:
+   print(f"NOT FOUND: {old[:80]!r}", file=sys.stderr)
+ if applied != len(EDITS):
+  print(f"Only applied {applied}/{len(EDITS)} edits.", file=sys.stderr)
+  return 1
+ with PLAN.open("w", encoding="utf-8", newline="") as f:
+  f.write(new_content)
+ print(f"Applied {applied}/{len(EDITS)} edits. Line endings: {'CRLF' if has_crlf else 'LF'}")
+ return 0
+
+
+if __name__ == "__main__":
+ raise SystemExit(main())