feat: add Chiron agent framework with 6 agents and 5 integration skills

Complete implementation of personal productivity agent framework for Oh-My-Opencode.

## Components Added

### Agents (6 total)
- Primary agents: chiron (Plan Mode), chiron-forge (Build Mode)
- Subagents: hermes (work communication), athena (work knowledge), apollo (private knowledge), calliope (writing)

### System Prompts (6 total)
- prompts/chiron.txt - Main orchestrator with delegation logic
- prompts/chiron-forge.txt - Execution/build counterpart
- prompts/hermes.txt - Basecamp, Outlook, MS Teams specialist
- prompts/athena.txt - Outline wiki/documentation specialist
- prompts/apollo.txt - Obsidian vault/private notes specialist
- prompts/calliope.txt - Writing/documentation specialist

### Integration Skills (5 total)
- skills/basecamp/SKILL.md - 63 MCP tools documented
- skills/outline/SKILL.md - Wiki/document management
- skills/msteams/SKILL.md - Teams/channels/meetings
- skills/outlook/SKILL.md - Email/calendar/contacts
- skills/obsidian/SKILL.md - Vault/note management

### Validation
- scripts/validate-agents.sh - Agent configuration validation
- All agents validated: JSON structure, modes, prompt references
- All prompts verified: Exist, non-empty, >500 chars
- All skills verified: Valid YAML frontmatter, SKILL.md structure

## Verification
✅ 6 agents in agents.json
✅ All 6 prompt files exist and non-empty
✅ All 5 skills have valid SKILL.md with YAML frontmatter
✅ validate-agents.sh passes (exit 0)

Co-authored-by: Sisyphus framework <atlas@opencode.dev>

skills/msteams/SKILL.md

@@ -0,0 +1,108 @@
+---
+name: msteams
+description: "Microsoft Teams Graph API integration for team communication. Use when: (1) Managing teams and channels, (2) Sending/receiving channel messages, (3) Scheduling or managing meetings, (4) Handling chat conversations. Triggers: 'Teams', 'meeting', 'channel', 'team message', 'chat', 'Teams message'."
+compatibility: opencode
+---
+
+# Microsoft Teams Integration
+
+Microsoft Teams Graph API integration for managing team communication, channels, messages, meetings, and chat conversations via MCP tools.
+
+## Core Capabilities
+
+### Teams & Channels
+- **List joined teams**: Retrieve all teams the user is a member of
+- **Manage channels**: Create, list, and manage channels within teams
+- **Team membership**: Add, remove, and update team members
+
+### Channel Messages
+- **Send messages**: Post messages to channels with rich text support
+- **Retrieve messages**: List channel messages with filtering by date range
+- **Message management**: Read and respond to channel communications
+
+### Online Meetings
+- **Schedule meetings**: Create online meetings with participants
+- **Manage meetings**: Update meeting details and coordinates
+- **Meeting access**: Retrieve join links and meeting information
+- **Presence**: Check user presence and activity status
+
+### Chat
+- **Direct messages**: 1:1 chat conversations with users
+- **Group chats**: Multi-person chat conversations
+- **Chat messages**: Send and receive chat messages
+
+## Common Workflows
+
+### Send Channel Message
+
+1. Identify target team and channel
+2. Compose message content
+3. Use MCP tool to send message to channel
+
+Example:
+```
+"Post a message to the 'General' channel in 'Engineering' team about the deployment status"
+```
+
+### Schedule Meeting
+
+1. Determine meeting participants
+2. Set meeting time and duration
+3. Create meeting title and description
+4. Use MCP tool to create online meeting
+
+Example:
+```
+"Schedule a meeting with @alice and @bob for Friday 2pm to discuss the project roadmap"
+```
+
+### List Channel Messages
+
+1. Specify team and channel
+2. Define date range (required for polling)
+3. Retrieve and display messages
+
+Example:
+```
+"Show me all messages in #general from the last week"
+```
+
+### Send Direct Message
+
+1. Identify recipient user
+2. Compose message
+3. Use MCP chat tool to send message
+
+Example:
+```
+"Send a message to @john asking if the PR review is complete"
+```
+
+## MCP Tool Categories
+
+The MS Teams MCP server provides tool categories for:
+
+- **Channels**: Team and channel management operations
+- **Messages**: Channel message operations
+- **Meetings**: Online meeting scheduling and management
+- **Chat**: Direct and group chat operations
+
+## Important Constraints
+
+**Authentication**: Do NOT include Graph API authentication flows. The MCP server handles authentication configuration.
+
+**Polling limits**: When retrieving messages, always specify a date range. Polling the same resource more than once per day is a violation of Microsoft APIs Terms of Use.
+
+**Email overlap**: Do NOT overlap with Outlook email functionality. This skill focuses on Teams-specific communication (channels, chat, meetings), not email operations.
+
+**File storage**: Files in channels are stored in SharePoint. Use SharePoint-specific operations for file management.
+
+## Domain Boundaries
+
+This skill integrates with **Hermes** (work communication agent). Hermes loads this skill when user requests:
+- Teams-related operations
+- Meeting scheduling or management
+- Channel communication
+- Teams chat conversations
+
+For email operations, Hermes uses the **outlook** skill instead.