feat: Create task-management skill

Documents the complete task lifecycle:
- Creating tasks with proper frontmatter
- Getting next task number
- Triggering website rebuilds
- Priority levels and colors
- Archive threshold (≥50KB OR ≥4 files)
- Troubleshooting common issues

Chronicler #69

docs/skills/SKILLS-INDEX.md

@@ -220,3 +220,21 @@ Skills encode standards into actionable workflows. Standards define what must be
 ---
 
 **Fire + Frost + Foundation = Where Love Builds Legacy** 💙🔥❄️
+
+## task-management
+
+**File:** `task-management.md`  
+**Created:** April 8, 2026 by Chronicler #69  
+**Purpose:** Guide for creating, updating, and managing Firefrost tasks
+
+**Triggers:**
+- Creating new tasks
+- Updating task status
+- Task not showing on mobile index
+- Understanding task architecture
+
+**Key concepts:**
+- Tasks in `docs/tasks/` with YAML frontmatter
+- Mobile index at `firefrostgaming.com/tasks-index.html`
+- Requires website rebuild to show new tasks
+- Archive threshold: ≥50KB OR ≥4 files

docs/skills/task-management.md

@@ -0,0 +1,161 @@
+# Skill: Task Management
+
+**Created:** April 8, 2026  
+**Created By:** Chronicler #69 (The Surveyor)  
+**Purpose:** Guide for creating, updating, and managing Firefrost tasks
+
+---
+
+## Overview
+
+Firefrost uses a file-based task system stored in Git. Tasks are displayed on a mobile-friendly index page at `firefrostgaming.com/tasks-index.html`.
+
+---
+
+## Architecture
+
+| Component | Repo | Purpose |
+|-----------|------|---------|
+| Task specs | `firefrost-operations-manual` | `docs/tasks/` — full task documentation |
+| Mobile index | `firefrost-website` | `tasks-index.njk` — fetches from Gitea at build time |
+| Data fetcher | `firefrost-website` | `_data/tasks.js` — API calls to Gitea |
+
+**Key insight:** The mobile index fetches task data at **build time** from Gitea. After adding/updating tasks in operations-manual, you must trigger a website rebuild for changes to appear.
+
+---
+
+## Creating a New Task
+
+### 1. Get the next task number
+
+```bash
+cd firefrost-operations-manual
+grep -rh "^task_number:" docs/tasks/ | sort -t: -k2 -n | tail -1
+```
+
+### 2. Create the task folder and README
+
+```bash
+mkdir -p docs/tasks/task-XXX-short-name
+```
+
+### 3. Add YAML frontmatter (REQUIRED)
+
+```yaml
+---
+task_number: XXX
+status: open
+priority: P1 | P2 | P3 | P4
+owner: Michael | Meg | Holly
+created: YYYY-MM-DD
+---
+
+# Task #XXX: Full Task Title
+
+**Created:** Month DD, YYYY  
+**Created By:** Chronicler #NN  
+
+---
+
+## Overview
+
+[Task description here]
+```
+
+### 4. Commit to operations-manual
+
+```bash
+git add docs/tasks/task-XXX-short-name/
+git commit -m "feat: Create Task #XXX - Short Description"
+git push
+```
+
+### 5. Trigger website rebuild
+
+Push any change to the website repo OR wait for the next website update:
+
+```bash
+cd firefrost-website
+echo "<!-- Rebuild: $(date -u +%Y-%m-%dT%H:%M:%SZ) -->" >> tasks-index.njk
+git add -A && git commit -m "chore: Trigger rebuild for Task #XXX" && git push
+```
+
+---
+
+## Updating Task Status
+
+Edit the frontmatter in the task's README.md:
+
+```yaml
+status: complete  # was: open
+```
+
+Valid statuses:
+- `open` — Active work
+- `blocked` — Waiting on something
+- `complete` — Done
+
+Commit and push, then trigger website rebuild.
+
+---
+
+## Priority Levels
+
+| Priority | Color | Use For |
+|----------|-------|---------|
+| P1 | 🔴 Fire (#FF6B35) | Critical, blockers, immediate |
+| P2 | 🟡 Gold (#FFD700) | High importance, do soon |
+| P3 | 🔵 Frost (#4ECDC4) | Normal priority |
+| P4 | 🟣 Arcane (#A855F7) | Low priority, backlog |
+
+---
+
+## Archive Threshold
+
+When closing tasks, decide whether to archive or delete:
+
+> **Archive if ≥50KB OR ≥4 files — otherwise delete.**
+
+Archive location: `docs/tasks/_archive/`
+
+---
+
+## Mobile Index Features
+
+- **Filtering:** By priority (P1/P2/P3/P4) or All Open
+- **Sorting:** Priority first, then task number, then title
+- **Links:** Each task links to Gitea for full details
+- **Stats:** Shows Open and Blocked counts
+
+URL: `firefrostgaming.com/tasks-index.html`
+
+---
+
+## Troubleshooting
+
+### Task not showing on mobile index
+
+1. Check frontmatter has `status: open` (not `complete`)
+2. Verify YAML syntax (no tabs, proper indentation)
+3. Trigger website rebuild (push to website repo)
+
+### Task number not displaying
+
+1. Add `task_number: XXX` to frontmatter
+2. Commit and push
+3. Trigger website rebuild
+
+### Wrong priority color
+
+Check `priority:` value is exactly `P1`, `P2`, `P3`, or `P4` (case-sensitive)
+
+---
+
+## Related Documents
+
+- Task #100: Task Number Audit & Standardization
+- `docs/consultations/gemini-task-management-consolidation-2026-04-08.md`
+
+---
+
+**Fire + Frost + Foundation = Where Love Builds Legacy** 💙🔥❄️