feat: add weekly-update skill for team reports

Author: joelhooks

skills/weekly-update/SKILL.md

@@ -0,0 +1,60 @@
+# Weekly Team Update Skill
+
+> Build narrative weekly updates for manager reports by gathering data from multiple sources.
+
+## Data Sources
+
+### Notion - Previous Updates
+
+```
+notion_notion-fetch(id="<page-id>")
+```
+
+### Linear - Issue Tracking
+
+```
+linear_list_issues(team="<team>", label="DX Deliverable")
+linear_get_issue(id="<issue-id>")
+```
+
+### Slack - Channel Context
+
+```
+slack_slack_get_channel_history(channel_id="<channel-id>", limit=100)
+```
+
+**Slack URL Format:** `https://<workspace>.slack.com/archives/<channel-id>/p<timestamp_without_dot>`
+
+## Output Structure
+
+- **BIG ROCKS** - Major ships, strategic initiatives
+- **MEDIUM ROCKS** - In-progress work with clear targets
+- **SMALL STUFF** - Backlog items
+- **Challenges** - Blockers, issues
+
+### For Each Item
+
+1. Title with link (Linear issue or live content)
+2. Supporting links (Slack threads, PRs, social)
+3. Why it matters
+4. Challenges (for big rocks)
+
+## Swarm Pattern
+
+1. Spawn parallel research workers (Notion, Linear, Slack)
+2. **HUMAN REVIEW** before posting (critical - this goes to leadership)
+3. After approval, spawn publish worker
+
+## Key Learnings
+
+- **Attribution matters** - "Joel's hypothesis that Eve validated"
+- **Links are non-negotiable** - Every claim needs a link
+- **Story > Bullets** - Boss wants narrative, not task lists
+- **Human review before publish** - Manager updates go to leadership
+
+## Linear Skill Reference
+
+Already exists at: `/Users/joel/.config/opencode/skills/linear/SKILL.md`
+
+- Has team IDs, collaborators, workflow states
+- Use as reference for Education team queries