feat(agent-teams): add plugin for multi-agent team orchestration

New plugin with 7 presets (review, debug, feature, fullstack, research,
security, migration), 4 specialized agents, 7 slash commands, 6 skills
with reference docs, and Context7 MCP integration for research teams.

plugins/agent-teams/commands/team-review.md

@@ -0,0 +1,78 @@
+---
+description: "Launch a multi-reviewer parallel code review with specialized review dimensions"
+argument-hint: "<target> [--reviewers security,performance,architecture,testing,accessibility] [--base-branch main]"
+---
+
+# Team Review
+
+Orchestrate a multi-reviewer parallel code review where each reviewer focuses on a specific quality dimension. Produces a consolidated, deduplicated report organized by severity.
+
+## Pre-flight Checks
+
+1. Verify `CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1` is set
+2. Parse `$ARGUMENTS`:
+   - `<target>`: file path, directory, git diff range (e.g., `main...HEAD`), or PR number (e.g., `#123`)
+   - `--reviewers`: comma-separated dimensions (default: `security,performance,architecture`)
+   - `--base-branch`: base branch for diff comparison (default: `main`)
+
+## Phase 1: Target Resolution
+
+1. Determine target type:
+   - **File/Directory**: Use as-is for review scope
+   - **Git diff range**: Use Bash to run `git diff {range} --name-only` to get changed files
+   - **PR number**: Use Bash to run `gh pr diff {number} --name-only` to get changed files
+2. Collect the full diff content for distribution to reviewers
+3. Display review scope to user: "{N} files to review across {M} dimensions"
+
+## Phase 2: Team Spawn
+
+1. Use `Teammate` tool with `operation: "spawnTeam"`, team name: `review-{timestamp}`
+2. For each requested dimension, use `Task` tool to spawn a teammate:
+   - `name`: `{dimension}-reviewer` (e.g., "security-reviewer")
+   - `subagent_type`: "agent-teams:team-reviewer"
+   - `prompt`: Include the dimension assignment, target files, and diff content
+3. Use `TaskCreate` for each reviewer's task:
+   - Subject: "Review {target} for {dimension} issues"
+   - Description: Include file list, diff content, and dimension-specific checklist
+
+## Phase 3: Monitor and Collect
+
+1. Wait for all review tasks to complete (check `TaskList` periodically)
+2. As each reviewer completes, collect their structured findings
+3. Track progress: "{completed}/{total} reviews complete"
+
+## Phase 4: Consolidation
+
+1. **Deduplicate**: Merge findings that reference the same file:line location
+2. **Resolve conflicts**: If reviewers disagree on severity, use the higher rating
+3. **Organize by severity**: Group findings as Critical, High, Medium, Low
+4. **Cross-reference**: Note findings that appear in multiple dimensions
+
+## Phase 5: Report and Cleanup
+
+1. Present consolidated report:
+
+   ```
+   ## Code Review Report: {target}
+
+   Reviewed by: {dimensions}
+   Files reviewed: {count}
+
+   ### Critical ({count})
+   [findings...]
+
+   ### High ({count})
+   [findings...]
+
+   ### Medium ({count})
+   [findings...]
+
+   ### Low ({count})
+   [findings...]
+
+   ### Summary
+   Total findings: {count} (Critical: N, High: N, Medium: N, Low: N)
+   ```
+
+2. Send `shutdown_request` to all reviewers
+3. Call `Teammate` cleanup to remove team resources