SoundBlaster · SoundBlaster · Feb 19, 2026 · Feb 19, 2026 · Feb 19, 2026 · Feb 19, 2026
diff --git a/...renderClientWidgets/FU-P12-T1-6_Uniform_HTML_escaping_in_renderClientWidgets.md b/...renderClientWidgets/FU-P12-T1-6_Uniform_HTML_escaping_in_renderClientWidgets.md
@@ -0,0 +1,85 @@
+# PRD: FU-P12-T1-6 — Uniform HTML escaping in `renderClientWidgets`
+
+**Created:** 2026-02-19
+**Priority:** P3
+**Branch:** `codex/feature/FU-P12-T1-6-uniform-html-escaping-client-widgets`
+**Status:** PLAN
+
+---
+
+## 1. Problem Statement
+
+`renderClientWidgets` in the dashboard escapes `name` and `version`, but does
+not consistently escape all interpolated values (`count`, `lastSeen`) before
+injecting HTML. This asymmetric pattern is low risk today but increases review
+and audit complexity.
+
+---
+
+## 2. Scope
+
+### In Scope
+- Update `renderClientWidgets` so all interpolated values are passed through
+  `escapeHtml()`.
+- Add or update frontend tests to verify escaping is applied uniformly.
+
+### Out of Scope
+- Dashboard visual redesign.
+- Backend metrics payload changes.
+- Changes to `formatRelativeAge` behavior.
+
+---
+
+## 3. Deliverables
+
+1. Uniform escaping in client widget rendering
+- `src/mcpbridge_wrapper/webui/static/dashboard.js`
+- Ensure `count` and `lastSeen` paths use `escapeHtml()` consistently.
+
+2. Test coverage
+- `tests/unit/webui/static/test_dashboard.js`
+- Add/update assertions for escaped rendering values.
+
+3. Validation artifact
+- `SPECS/INPROGRESS/FU-P12-T1-6_Validation_Report.md`
+
+---
+
+## 4. Acceptance Criteria
+
+- [ ] All interpolated values in `renderClientWidgets` are escaped.
+- [ ] No visual/behavioral regression in client widget rendering.
+- [ ] `pytest` passes.
+- [ ] `ruff check src/` passes.
+- [ ] `mypy src/` passes.
+- [ ] `pytest --cov` reports coverage >= 90%.
+
+---
+
+## 5. Dependencies
+
+- FU-P12-T1-3 ✅
+
+---
+
+## 6. Risks and Mitigations
+
+- **Risk:** Escaping numeric values may alter formatting unexpectedly.
+  - **Mitigation:** Keep formatting conversion stable (`String(...)`) and verify
+    rendered output via tests.
+
+- **Risk:** Duplicate escaping for derived strings could change displayed text.
+  - **Mitigation:** Escape at the final interpolation boundary and validate with
+    existing widget rendering tests.
+
+---
+
+## 7. Validation Plan
+
+1. Apply uniform escaping in `renderClientWidgets`.
+2. Add/update tests for escaped output paths.
+3. Run full quality gates and capture results.
+
+---
+**Archived:** 2026-02-19
+**Verdict:** PASS
diff --git a/...6_Uniform_HTML_escaping_in_renderClientWidgets/FU-P12-T1-6_Validation_Report.md b/...6_Uniform_HTML_escaping_in_renderClientWidgets/FU-P12-T1-6_Validation_Report.md
@@ -0,0 +1,39 @@
+# Validation Report — FU-P12-T1-6
+
+**Task:** FU-P12-T1-6 — Uniform HTML escaping in `renderClientWidgets`  
+**Date:** 2026-02-19  
+**Verdict:** PASS
+
+## Scope
+
+- Applied uniform escaping in `renderClientWidgets` so `count` and `lastSeen`
+  are escaped before interpolation into `innerHTML`.
+- Added a static-asset test verifying `dashboard.js` contains the escaped
+  interpolation path for these widget values.
+
+## Files Changed
+
+- `src/mcpbridge_wrapper/webui/static/dashboard.js`
+- `tests/unit/webui/test_server.py`
+
+## Required Quality Gates
+
+- `pytest`
+  - Result: **PASS** (`594 passed, 5 skipped, 2 warnings`)
+- `ruff check src/`
+  - Result: **PASS** (`All checks passed!`)
+- `mypy src/`
+  - Result: **PASS** (`Success: no issues found in 18 source files`)
+- `pytest --cov`
+  - Result: **PASS** (`594 passed, 5 skipped, 2 warnings`; total coverage **92.18%**, threshold 90%)
+
+## Acceptance Criteria Status
+
+- [x] All interpolated values in `renderClientWidgets` are passed through `escapeHtml()`.
+- [x] No visual regression in client widget rendering.
+- [x] `pytest` suite remains green.
+
+## Notes
+
+- Existing third-party deprecation warnings from `websockets` / `uvicorn` were
+  observed during test runs and are unrelated to this task.
diff --git a/SPECS/ARCHIVE/INDEX.md b/SPECS/ARCHIVE/INDEX.md
@@ -1,6 +1,6 @@
 # mcpbridge-wrapper Tasks Archive
 
-**Last Updated:** 2026-02-19 (REVIEW_fu_p12_t1_5_client_identity_retention_archived)
+**Last Updated:** 2026-02-19 (REVIEW_fu_p12_t1_6_uniform_client_widget_escaping_archived)
 
 ## Archived Tasks
 
@@ -120,6 +120,7 @@
 | FU-P12-T1-3 | [FU-P12-T1-3_Show_multi-client_widgets_in_Web_UI_instead_of_single_overwritten_active_client/](FU-P12-T1-3_Show_multi-client_widgets_in_Web_UI_instead_of_single_overwritten_active_client/) | 2026-02-18 | PASS |
 | FU-P12-T1-4 | [FU-P12-T1-4_Make_IN_FLIGHT_KPI_reflect_real_in_flight_requests_in_shared_metrics_mode/](FU-P12-T1-4_Make_IN_FLIGHT_KPI_reflect_real_in_flight_requests_in_shared_metrics_mode/) | 2026-02-19 | PASS |
 | FU-P12-T1-5 | [FU-P12-T1-5_Cap_clients_dict_and_prune_client_identities_to_prevent_unbounded_growth/](FU-P12-T1-5_Cap_clients_dict_and_prune_client_identities_to_prevent_unbounded_growth/) | 2026-02-19 | PASS |
+| FU-P12-T1-6 | [FU-P12-T1-6_Uniform_HTML_escaping_in_renderClientWidgets/](FU-P12-T1-6_Uniform_HTML_escaping_in_renderClientWidgets/) | 2026-02-19 | PASS |
 | FU-P12-T3-2 | [FU-P12-T3-2_Add_error_code_column_to_audit_CSV_export/](FU-P12-T3-2_Add_error_code_column_to_audit_CSV_export/) | 2026-02-19 | PASS |
 
 ## Historical Artifacts
@@ -204,6 +205,7 @@
 | [REVIEW_FU-P12-T1-3_multi_client_widgets.md](_Historical/REVIEW_FU-P12-T1-3_multi_client_widgets.md) | Review report for FU-P12-T1-3 |
 | [REVIEW_FU-P12-T1-4_in_flight_shared_metrics.md](_Historical/REVIEW_FU-P12-T1-4_in_flight_shared_metrics.md) | Review report for FU-P12-T1-4 |
 | [REVIEW_FU-P12-T1-5_client_identity_retention.md](_Historical/REVIEW_FU-P12-T1-5_client_identity_retention.md) | Review report for FU-P12-T1-5 |
+| [REVIEW_FU-P12-T1-6_uniform_client_widget_escaping.md](_Historical/REVIEW_FU-P12-T1-6_uniform_client_widget_escaping.md) | Review report for FU-P12-T1-6 |
 | [REVIEW_FU-P12-T3-2_error_code_csv_export.md](_Historical/REVIEW_FU-P12-T3-2_error_code_csv_export.md) | Review report for FU-P12-T3-2 |
 
 ## Archive Log
@@ -362,5 +364,7 @@
 | 2026-02-19 | FU-P12-T1-4 | Archived REVIEW_FU-P12-T1-4_in_flight_shared_metrics report |
 | 2026-02-19 | FU-P12-T1-5 | Archived Cap_clients_dict_and_prune_client_identities_to_prevent_unbounded_growth (PASS) |
 | 2026-02-19 | FU-P12-T1-5 | Archived REVIEW_FU-P12-T1-5_client_identity_retention report |
+| 2026-02-19 | FU-P12-T1-6 | Archived Uniform_HTML_escaping_in_renderClientWidgets (PASS) |
+| 2026-02-19 | FU-P12-T1-6 | Archived REVIEW_FU-P12-T1-6_uniform_client_widget_escaping report |
 | 2026-02-19 | FU-P12-T3-2 | Archived Add_error_code_column_to_audit_CSV_export (PASS) |
 | 2026-02-19 | FU-P12-T3-2 | Archived REVIEW_FU-P12-T3-2_error_code_csv_export report |
diff --git a/SPECS/ARCHIVE/_Historical/REVIEW_FU-P12-T1-6_uniform_client_widget_escaping.md b/SPECS/ARCHIVE/_Historical/REVIEW_FU-P12-T1-6_uniform_client_widget_escaping.md
@@ -0,0 +1,32 @@
+## REVIEW REPORT — FU-P12-T1-6 uniform client widget escaping
+
+**Scope:** origin/main..HEAD
+**Files:** 9
+
+### Summary Verdict
+- [x] Approve
+- [ ] Approve with comments
+- [ ] Request changes
+- [ ] Block
+
+### Critical Issues
+- None.
+
+### Secondary Issues
+- None.
+
+### Architectural Notes
+- Frontend rendering now escapes all `renderClientWidgets` interpolated values
+  uniformly, reducing audit ambiguity for future XSS/security reviews.
+- Added a static asset assertion in server tests to lock in the escaping path.
+
+### Tests
+- Quality gates rerun and passing:
+  - `pytest` (`594 passed, 5 skipped, 2 warnings`)
+  - `ruff check src/` (`All checks passed!`)
+  - `mypy src/` (`Success: no issues found in 18 source files`)
+  - `pytest --cov` (`92.18%`, threshold `>=90%`)
+
+### Next Steps
+- No actionable follow-up items identified.
+- FOLLOW-UP step can be skipped for this task.
diff --git a/SPECS/INPROGRESS/next.md b/SPECS/INPROGRESS/next.md
@@ -2,15 +2,15 @@
 
 ## Recently Archived
 
+- 2026-02-19 — FU-P12-T1-6: Uniform HTML escaping in `renderClientWidgets` (PASS)
 - 2026-02-19 — FU-P12-T1-5: Cap `_clients` dict and prune `client_identities` to prevent unbounded growth (PASS)
 - 2026-02-19 — FU-P12-T1-4: Make `IN FLIGHT` KPI reflect real in-flight requests in shared-metrics mode (PASS)
 - 2026-02-19 — FU-P12-T3-2: Add `error_code` column to audit CSV export (PASS)
 - 2026-02-18 — FU-P12-T1-3: Show multi-client widgets in Web UI instead of single overwritten active client (PASS)
 - 2026-02-18 — FU-P12-T1-2: Add code comment clarifying stdin-only client capture in `on_request` (PASS)
-- 2026-02-18 — FU-P12-T1-1: Remove or document `MCPInitializeParams` in schemas (PASS)
 
 ## Suggested Next Tasks
 
 - P13-T5 follow-up — Complete interactive prompt verification in a desktop session (P1)
-- FU-P12-T1-6 — Uniform HTML escaping in `renderClientWidgets` (P3)
 - FU-P12-T3-1 — Document unused `error_message` parameter in `MetricsCollector.record_response` (P3)
+- Final scripted follow-up after this: no additional `pick_next_task` items remain
diff --git a/SPECS/Workplan.md b/SPECS/Workplan.md
@@ -2268,17 +2268,18 @@ Phase 9 Follow-up Backlog
 
 ---
 
-#### ⬜️ FU-P12-T1-6: Uniform HTML escaping in `renderClientWidgets`
+#### ✅ FU-P12-T1-6: Uniform HTML escaping in `renderClientWidgets`
+- **Status:** ✅ Completed (2026-02-19)
 - **Description:** In `dashboard.js` `renderClientWidgets`, the `count` integer and `lastSeen` string are interpolated into innerHTML without `escapeHtml()`, while `name` and `version` are escaped. Although `count` is always a number and `lastSeen` already passes through `escapeHtml` inside `formatRelativeAge`, the asymmetric pattern makes security auditing harder. Apply `escapeHtml()` uniformly to all interpolated values for consistency.
 - **Priority:** P3
 - **Dependencies:** FU-P12-T1-3
 - **Parallelizable:** yes
 - **Outputs/Artifacts:**
   - Updated `src/mcpbridge_wrapper/webui/static/dashboard.js` — uniform escaping in `renderClientWidgets`
 - **Acceptance Criteria:**
-  - [ ] All interpolated values in `renderClientWidgets` are passed through `escapeHtml()`
-  - [ ] No visual regression in client widget rendering
-  - [ ] `pytest` suite remains green
+  - [x] All interpolated values in `renderClientWidgets` are passed through `escapeHtml()`
+  - [x] No visual regression in client widget rendering
+  - [x] `pytest` suite remains green
 
 ---
 

diff --git a/src/mcpbridge_wrapper/webui/static/dashboard.js b/src/mcpbridge_wrapper/webui/static/dashboard.js
@@ -227,10 +227,12 @@
             var version = client.version || "unknown";
             var count = client.initialize_count || 0;
             var lastSeen = formatRelativeAge(client.last_seen);
+            var escapedCount = escapeHtml(String(count));
+            var escapedLastSeen = escapeHtml(String(lastSeen));
             return "<div class='client-widget-card'>"
                 + "<div class='client-widget-title'>" + escapeHtml(name) + " " + escapeHtml(version) + "</div>"
-                + "<div class='client-widget-meta'>Initialize calls: " + count + "</div>"
-                + "<div class='client-widget-meta'>Last seen: " + escapeHtml(lastSeen) + "</div>"
+                + "<div class='client-widget-meta'>Initialize calls: " + escapedCount + "</div>"
+                + "<div class='client-widget-meta'>Last seen: " + escapedLastSeen + "</div>"
                 + "</div>";
         }).join("");
     }

diff --git a/tests/unit/webui/test_server.py b/tests/unit/webui/test_server.py
@@ -159,6 +159,15 @@ def test_dashboard_served(self, client):
         assert "/static/dashboard.css" in response.text
         assert "/static/dashboard.js" in response.text
 
+    def test_dashboard_js_uses_uniform_client_widget_escaping(self, client):
+        """Client widget interpolations in dashboard.js use escapeHtml uniformly."""
+        response = client.get("/static/dashboard.js")
+        assert response.status_code == 200
+        assert 'Initialize calls: " + escapedCount + "' in response.text
+        assert 'Last seen: " + escapedLastSeen + "' in response.text
+        assert "var escapedCount = escapeHtml(String(count));" in response.text
+        assert "var escapedLastSeen = escapeHtml(String(lastSeen));" in response.text
+
     def test_websocket_metrics_update_includes_sessions(self, client, audit):
         """WebSocket metrics_update message includes sessions key."""
         with client.websocket_connect("/ws/metrics") as websocket: