diff --git a/.kiro-krew/specs/issue-266-update-about-dialog-title.md b/.kiro-krew/specs/issue-266-update-about-dialog-title.md
new file mode 100644
index 0000000..e4f0c0c
--- /dev/null
+++ b/.kiro-krew/specs/issue-266-update-about-dialog-title.md
@@ -0,0 +1,133 @@
+# Design Specification: Update About Dialog Title
+
+**Issue**: #266  
+**Title**: Update about dialog title from 'Kiro-Krew' to 'Elasticache Krew'  
+**Created**: 2026-08-26
+
+Closes #266
+
+## Problem Statement
+
+The about dialog currently displays "Kiro-Krew Version Information" as its title. This needs to be updated to reflect "Elasticache Krew" branding to align with the project's rebranding initiative.
+
+## Solution Approach
+
+This is a straightforward string replacement task. The change affects only the title parameter passed to the `activateOverlay()` function within the `handleAbout()` method in `/internal/tui/commands.go`.
+
+### Current Implementation
+
+The about dialog is triggered by the `about` command in the REPL interface. The flow is:
+
+1. User types `about` command
+2. Command parser in `tui.go` (line ~1245) calls `handleAbout()`
+3. `handleAbout()` in `commands.go` (line 419-424):
+   - Builds dialog content using `AboutDialog.BuildContent()`
+   - Updates status line with "Checking for updates..."
+   - Calls `activateOverlay()` with title **"Kiro-Krew Version Information"**
+   - Returns command to check for updates
+
+The `activateOverlay()` function (defined in `tui.go` line 717) stores the title in the overlay content structure, which is then rendered in the UI.
+
+### Change Required
+
+Update line 423 in `/internal/tui/commands.go`:
+
+**Current**:
+```go
+m = m.activateOverlay(overlayAbout, "Kiro-Krew Version Information", m.aboutDialog.GetFullContent())
+```
+
+**New**:
+```go
+m = m.activateOverlay(overlayAbout, "Elasticache Krew Version Information", m.aboutDialog.GetFullContent())
+```
+
+### Scope Limitations
+
+Per acceptance criteria, **only** the about dialog title should be modified. Other occurrences of "Kiro-Krew" or related branding strings elsewhere in the codebase are explicitly out of scope for this issue.
+
+The only other reference found was in `.kiro-krew/specs/issue-49-overlay-popups.md` which is a historical spec document and should not be modified.
+
+## Relevant Files
+
+### Files to Modify
+
+- `/internal/tui/commands.go` (line 423) — Update title string parameter
+
+### Files Referenced (No Changes)
+
+- `/internal/tui/tui.go` — Contains `activateOverlay()` function definition
+- `/internal/tui/about.go` — Contains `AboutDialog` implementation
+- `/internal/tui/commands_test.go` — Contains existing test for `AboutDialog`
+
+## Team Orchestration
+
+This is a single-file, single-line change with no dependencies. The task can be completed atomically by one builder agent.
+
+No coordination with other components is required since:
+- The title is a display-only string with no functional impact
+- No tests directly assert on the title text
+- The change does not affect any interfaces or data structures
+
+## Step-by-Step Task Breakdown
+
+### Task 1: Update About Dialog Title String
+
+**Description**: Change the title parameter in the `handleAbout()` function from "Kiro-Krew Version Information" to "Elasticache Krew Version Information"
+
+**Acceptance Criteria**:
+- Line 423 in `/internal/tui/commands.go` updated with new title string
+- String change is exact: "Elasticache Krew Version Information"
+- No other lines modified in the file
+- Code compiles without errors
+
+**Dependencies**: None
+
+**Implementation Steps**:
+1. Open `/internal/tui/commands.go`
+2. Locate line 423 in the `handleAbout()` function
+3. Replace `"Kiro-Krew Version Information"` with `"Elasticache Krew Version Information"`
+4. Save the file
+5. Verify compilation with `go build ./cmd/kiro-krew`
+
+## Validation Commands
+
+### Build Verification
+```bash
+go build ./cmd/kiro-krew
+```
+Expected: Clean build with no errors
+
+### Manual Testing
+```bash
+./kiro-krew
+# In the REPL, type:
+about
+```
+Expected: Dialog appears with title "Elasticache Krew Version Information"
+
+### Automated Testing
+```bash
+go test ./internal/tui/...
+```
+Expected: All existing tests pass (no test changes needed since tests don't assert on title text)
+
+### Code Review Checklist
+- [ ] Only line 423 in `/internal/tui/commands.go` modified
+- [ ] Title string is exactly "Elasticache Krew Version Information"
+- [ ] No other "Kiro-Krew" references modified
+- [ ] Code builds successfully
+- [ ] Manual verification shows correct title in about dialog
+
+## Notes
+
+### Why This is Safe
+
+1. **Isolated Change**: The title parameter is purely for display purposes
+2. **No Breaking Changes**: No API, interface, or data structure changes
+3. **No Test Updates Needed**: Existing tests validate structure, not specific string content
+4. **No Dependencies**: No other code depends on this specific string value
+
+### Future Considerations
+
+This change is part of a broader rebranding effort. Other occurrences of "Kiro-Krew" throughout the codebase may be addressed in separate issues to maintain atomic, reviewable changes.
diff --git a/internal/tui/commands.go b/internal/tui/commands.go
index 42eaa72..9480701 100644
--- a/internal/tui/commands.go
+++ b/internal/tui/commands.go
@@ -420,7 +420,7 @@ func (m model) handleAbout() (model, tea.Cmd) {
 	m.aboutDialog.BuildContent()
 	m.aboutDialog.UpdateStatusLine([]string{"Checking for updates..."})
 
-	m = m.activateOverlay(overlayAbout, "Kiro-Krew Version Information", m.aboutDialog.GetFullContent())
+	m = m.activateOverlay(overlayAbout, "Elasticache Krew Version Information", m.aboutDialog.GetFullContent())
 	return m, checkForUpdateCmd()
 }