diff --git a/.claude/optimization-todos.md b/.claude/optimization-todos.md
index 72c70446..24d7a556 100644
--- a/.claude/optimization-todos.md
+++ b/.claude/optimization-todos.md
@@ -132,18 +132,18 @@ Each item has specific file:line references and expected impact estimates.
 
 | Item | Status | Completed By | Notes |
 |------|--------|--------------|-------|
-| 1 | ☐ Pending | | |
-| 2 | ☐ Pending | | |
-| 3 | ☐ Pending | | |
+| 1 | ✅ Done | Claude | BufferAccumulator in session.ts, respawn-controller.ts |
+| 2 | ✅ Done | Claude | Already had lastIndex resets in place |
+| 3 | ✅ Done | Claude | BufferAccumulator auto-trims, no manual limits needed |
 | 4 | ☐ Pending | | |
 | 5 | ☐ Pending | | |
 | 6 | ☐ Pending | | |
 | 7 | ☐ Pending | | |
 | 8 | ☐ Pending | | |
-| 9 | ☐ Pending | | |
+| 9 | ✅ Done | Claude | Removed ANSI_ESCAPE_PATTERN, WHITESPACE_PATTERN |
 | 10 | ☐ Pending | | |
 | 11 | ☐ Pending | | |
 | 12 | ☐ Pending | | |
-| 13 | ☐ Pending | | |
+| 13 | ☐ Pending | | Not unused - used by CLI |
 | 14 | ☐ Pending | | |
 | 15 | ☐ Pending | | |
diff --git a/src/respawn-controller.ts b/src/respawn-controller.ts
index dbb779a0..ece2a267 100644
--- a/src/respawn-controller.ts
+++ b/src/respawn-controller.ts
@@ -43,20 +43,7 @@ const MAX_RESPAWN_BUFFER_SIZE = 1024 * 1024; // 1MB
  */
 const RESPAWN_BUFFER_TRIM_SIZE = 512 * 1024; // 512KB
 
-// ========== Pre-compiled Regex Patterns ==========
-
-/**
- * Matches ANSI escape codes for terminal control sequences.
- * Used to strip formatting before pattern matching.
- * @deprecated Currently unused but kept for potential future use
- */
-const ANSI_ESCAPE_PATTERN = /\x1b\[[0-9;]*[HJKmsu?lh]/g;
-
-/**
- * Matches whitespace sequences for normalization.
- * @deprecated Currently unused but kept for potential future use
- */
-const WHITESPACE_PATTERN = /\s+/g;
+// ========== Constants ==========
 
 /**
  * The definitive "ready for input" indicator.