diff --git a/conductor/archive/add_calcium_20260213/index.md b/conductor/archive/add_calcium_20260213/index.md
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+# Track add_calcium_20260213 Context
+
+- [Specification](./spec.md)
+- [Implementation Plan](./plan.md)
+- [Metadata](./metadata.json)
diff --git a/conductor/archive/add_calcium_20260213/metadata.json b/conductor/archive/add_calcium_20260213/metadata.json
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+{
+  "track_id": "add_calcium_20260213",
+  "type": "feature",
+  "status": "new",
+  "created_at": "2026-02-13T00:00:00Z",
+  "updated_at": "2026-02-13T00:00:00Z",
+  "description": "Add Calcium bottom row of 'Daily Totals' on the tracker page"
+}
diff --git a/conductor/archive/add_calcium_20260213/plan.md b/conductor/archive/add_calcium_20260213/plan.md
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+# Implementation Plan - Add Calcium to Tracker Totals
+
+This plan follows the Test-Driven Development (TDD) process as outlined in `conductor/workflow.md`.
+
+## Phase 1: Infrastructure and Red Phase
+- [x] Task: Create a failing E2E test for Calcium display
+    - [ ] Define a new test in `tests/calcium_display.spec.js` that navigates to the tracker and expects a "Calcium" label and a numeric value in the Daily Totals section.
+    - [ ] Execute the test and confirm it fails (Red Phase).
+
+## Phase 2: Implementation (Green Phase) [checkpoint: 7718a7f]
+- [x] Task: Update tracker template to include Calcium
+    - [ ] Modify `templates/tracker.html` to add a fourth column to the third row of the "Daily Totals" card.
+    - [ ] Update existing `col-4` classes in that row to `col-3` to accommodate the new column.
+    - [ ] Bind the display to `day_totals.calcium` with a `0` decimal place filter and "mg" unit.
+- [x] Task: Verify implementation
+    - [ ] Execute the E2E test created in Phase 1 and confirm it passes (Green Phase).
+    - [ ] Run existing backend tests to ensure no regressions in nutrition calculations.
+- [x] Task: Conductor - User Manual Verification 'Implementation' (Protocol in workflow.md)
diff --git a/conductor/archive/add_calcium_20260213/spec.md b/conductor/archive/add_calcium_20260213/spec.md
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+# Specification - Add Calcium to Tracker Totals
+
+## Overview
+This track adds a Calcium display to the "Daily Totals" section of the tracker page. This allows users to track their calcium intake (in mg) alongside other micronutrients and macronutrients.
+
+## Functional Requirements
+- **Display Calcium:** Add a new column to the third row of the "Daily Totals" card on the `tracker.html` page.
+- **Unit of Measurement:** Calcium shall be displayed in milligrams (mg).
+- **Precision:** Calcium values shall be rounded to the nearest whole number (0 decimal places).
+- **Data Source:** Use the `day_totals.calcium` value provided by the backend, which is already correctly calculated in `calculate_day_nutrition_tracked`.
+
+## Non-Functional Requirements
+- **UI Consistency:** The new Calcium display should match the style of the existing Sugar, Fiber, and Sodium displays (border, padding, centered text, small muted label).
+- **Responsiveness:** The layout should remain functional on various screen sizes. Adding a fourth column to the row may require adjusting column widths (e.g., from `col-4` to `col-3`).
+
+## Acceptance Criteria
+- [ ] A "Calcium" box is visible in the "Daily Totals" section of the tracker page.
+- [ ] The value displayed matches the sum of calcium from all tracked foods for that day.
+- [ ] The unit "mg" is displayed next to or below the value.
+- [ ] The layout of the "Daily Totals" card remains clean and balanced.
+
+## Out of Scope
+- Adding Calcium to individual food or meal breakdown tables.
+- Updating Open Food Facts import logic (unless found to be missing Calcium data during verification).
+- Adding Calcium targets or progress bars.
diff --git a/conductor/tracks.md b/conductor/tracks.md
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 This file tracks all major tracks for the project. Each track has its own detailed plan in its respective folder.
 
 ---
-
-- [x] **Track: Add Calcium bottom row of "Daily Totals" on the tracker page**
-  *Link: [./tracks/add_calcium_20260213/](./tracks/add_calcium_20260213/)*