SoundBlaster · SoundBlaster · Feb 20, 2026 · Feb 20, 2026 · Feb 20, 2026 · Feb 20, 2026
diff --git a/...idth_streatched/BUG-T18_Error_Breakdown_widget_must_be_full_width_streatched.md b/...idth_streatched/BUG-T18_Error_Breakdown_widget_must_be_full_width_streatched.md
@@ -0,0 +1,31 @@
+# PRD — BUG-T18 Error Breakdown widget must be full width streatched
+
+## Context
+The user requested adding a tracked bug item to the workplan for a Web UI layout issue where the Error Breakdown widget should be full-width stretched.
+
+## Objective
+Track the issue in `SPECS/Workplan.md` with a complete bug entry that can be selected and implemented in a future execution task.
+
+## Scope
+- Add one new bug entry: `BUG-T18`.
+- Include type, status, priority, component, description, symptoms, root-cause hypothesis, resolution path, and related items.
+
+## Out of Scope
+- Implementing UI code changes.
+- Updating tests.
+- Closing the bug.
+
+## Deliverables
+- Updated `SPECS/Workplan.md` with `BUG-T18` entry.
+
+## Acceptance Criteria
+- `BUG-T18` entry exists in `SPECS/Workplan.md`.
+- Entry status is open.
+- Entry clearly states full-width stretch requirement for Error Breakdown widget.
+- Entry includes actionable checklist in Resolution Path.
+
+## Dependencies
+- None.
+
+## Risks
+- Typo in task wording is preserved intentionally to match user-provided bug title.
diff --git a/...ror_Breakdown_widget_must_be_full_width_streatched/BUG-T18_Validation_Report.md b/...ror_Breakdown_widget_must_be_full_width_streatched/BUG-T18_Validation_Report.md
@@ -0,0 +1,25 @@
+# Validation Report — BUG-T18
+
+## Task
+- **ID:** BUG-T18
+- **Name:** Error Breakdown widget must be full width streatched
+- **Date:** 2026-02-20
+- **Verdict:** PASS
+
+## Scope Executed
+- Added a new bug entry in `SPECS/Workplan.md` to track the Error Breakdown full-width requirement.
+
+## Acceptance Criteria Check
+- [x] `BUG-T18` entry exists in `SPECS/Workplan.md`
+- [x] Entry status is open
+- [x] Entry explicitly states full-width stretch requirement
+- [x] Entry includes actionable Resolution Path checklist
+
+## Quality Gates
+- `PYTHONPATH=src pytest` → PASS (`629 passed, 5 skipped`)
+- `ruff check src/` → PASS
+- `mypy src/` → PASS
+- `PYTHONPATH=src pytest --cov` → PASS (coverage `91.33%`, required `>=90%`)
+
+## Notes
+- This task is documentation/workplan tracking only; no runtime code changes were introduced.
diff --git a/SPECS/ARCHIVE/INDEX.md b/SPECS/ARCHIVE/INDEX.md
@@ -1,6 +1,6 @@
 # mcpbridge-wrapper Tasks Archive
 
-**Last Updated:** 2026-02-20 (BUG-T16_Tool_Distribution_Pie_widget_is_cropped_at_medium_widths)
+**Last Updated:** 2026-02-20 (BUG-T18_Error_Breakdown_widget_must_be_full_width_streatched)
 
 ## Archived Tasks
 
@@ -93,6 +93,7 @@
 | BUG-T8 | [BUG-T8_Audit_Log_Cross_Process_Visibility/](BUG-T8_Audit_Log_Cross_Process_Visibility/) | 2026-02-15 | PASS |
 | BUG-T15 | [BUG-T15_WebUI_Port_Config_Investigation/](BUG-T15_WebUI_Port_Config_Investigation/) | 2026-02-20 | PASS |
 | BUG-T16 | [BUG-T16_Tool_Distribution_Pie_widget_is_cropped_at_medium_widths/](BUG-T16_Tool_Distribution_Pie_widget_is_cropped_at_medium_widths/) | 2026-02-20 | PASS |
+| BUG-T18 | [BUG-T18_Error_Breakdown_widget_must_be_full_width_streatched/](BUG-T18_Error_Breakdown_widget_must_be_full_width_streatched/) | 2026-02-20 | PASS |
 | P11-T2 | [P11-T2_Add_Session_Timeline_View/](P11-T2_Add_Session_Timeline_View/) | 2026-02-15 | PASS |
 | P11-T3 | [P11-T3_Add_Dashboard_Theme_Toggle/](P11-T3_Add_Dashboard_Theme_Toggle/) | 2026-02-15 | PASS |
 | P11-T4 | [P11-T4_Add_Keyboard_Shortcuts_Command_Palette/](P11-T4_Add_Keyboard_Shortcuts_Command_Palette/) | 2026-02-15 | PASS |
@@ -241,6 +242,7 @@
 | [REVIEW_FU-P14-T5-1_macos_ci_socket_path.md](_Historical/REVIEW_FU-P14-T5-1_macos_ci_socket_path.md) | Review report for FU-P14-T5-1 |
 | [REVIEW_bug_t15_webui_port_config.md](_Historical/REVIEW_bug_t15_webui_port_config.md) | Review report for BUG-T15 |
 | [REVIEW_bug_t16_pie_responsive.md](_Historical/REVIEW_bug_t16_pie_responsive.md) | Review report for BUG-T16 |
+| [REVIEW_bug_t18_workplan_entry.md](_Historical/REVIEW_bug_t18_workplan_entry.md) | Review report for BUG-T18 |
 
 ## Archive Log
 
@@ -437,3 +439,5 @@
 | 2026-02-20 | BUG-T15 | Archived REVIEW_bug_t15_webui_port_config report |
 | 2026-02-20 | BUG-T16 | Archived Tool_Distribution_Pie_widget_is_cropped_at_medium_widths (PASS) |
 | 2026-02-20 | BUG-T16 | Archived REVIEW_bug_t16_pie_responsive report |
+| 2026-02-20 | BUG-T18 | Archived Error_Breakdown_widget_must_be_full_width_streatched (PASS) |
+| 2026-02-20 | BUG-T18 | Archived REVIEW_bug_t18_workplan_entry report |
diff --git a/SPECS/ARCHIVE/_Historical/REVIEW_bug_t18_workplan_entry.md b/SPECS/ARCHIVE/_Historical/REVIEW_bug_t18_workplan_entry.md
@@ -0,0 +1,29 @@
+## REVIEW REPORT — BUG-T18 Workplan Entry
+
+**Scope:** origin/main..HEAD
+**Files:** 4
+
+### Summary Verdict
+- [x] Approve
+- [ ] Approve with comments
+- [ ] Request changes
+- [ ] Block
+
+### Critical Issues
+- None.
+
+### Secondary Issues
+- None.
+
+### Architectural Notes
+- The change is documentation-only and correctly keeps implementation work deferred to a future bug-fix task.
+
+### Tests
+- Quality gates were executed during EXECUTE:
+  - `PYTHONPATH=src pytest`
+  - `ruff check src/`
+  - `mypy src/`
+  - `PYTHONPATH=src pytest --cov` (91.33%, meets >=90%)
+
+### Next Steps
+- FOLLOW-UP is skipped because no actionable review findings were identified.
diff --git a/SPECS/INPROGRESS/next.md b/SPECS/INPROGRESS/next.md
@@ -2,6 +2,7 @@
 
 ## Recently Archived
 
+- **BUG-T18** — Error Breakdown widget must be full width streatched (2026-02-20, PASS)
 - **BUG-T16** — Tool Distribution (Pie) widget is cropped at medium widths (2026-02-20, PASS)
 - **BUG-T15** — Web UI fails to come up in MCP client runs when `--web-ui-port` and `--web-ui-config` are combined (2026-02-20, PASS)
 

diff --git a/SPECS/Workplan.md b/SPECS/Workplan.md
@@ -1594,6 +1594,42 @@ Temporarily increase dashboard refresh interval via config to reduce frequency o
 
 ---
 
+### BUG-T18: Error Breakdown widget must be full width streatched
+- **Type:** Bug / Web UI / Layout
+- **Status:** 🔴 Open
+- **Priority:** P2
+- **Discovered:** 2026-02-20
+- **Component:** Web UI Dashboard (`webui/static/index.html`, `webui/static/dashboard.css`)
+- **Affected Clients:** All clients using Web UI dashboard
+- **Affected Surface:** Error Breakdown widget
+
+#### Description
+The "Error Breakdown" widget must be displayed as a full-width stretched widget in the dashboard layout.
+
+#### Symptoms
+```text
+Error Breakdown appears as a regular half-width card in the chart grid.
+Expected: Error Breakdown spans the full row width.
+```
+
+#### Root Cause Analysis
+Likely the widget container is using the default chart card class and is not marked to span all grid columns.
+
+#### Workaround
+None.
+
+#### Resolution Path
+- [ ] Reproduce on current dashboard layout and confirm non-full-width rendering
+- [ ] Update chart container/layout rules so Error Breakdown spans full width
+- [ ] Validate responsive behavior at desktop/tablet/mobile breakpoints
+- [ ] Add regression coverage for full-width Error Breakdown layout
+
+#### Related Items
+- **P10-T1** ✅ — Web UI dashboard chart layout baseline
+- **BUG-T16** ✅ — Another chart layout responsiveness fix
+
+---
+
 ### Phase 10: Web UI Control & Audit Dashboard
 
 **Intent:** Create a web-based dashboard for real-time monitoring, control, and audit logging of the XcodeMCPWrapper. Provides visibility into MCP tool usage, performance metrics, and operational control.