feat: comprehensive registry improvements

Community docs:
- CODE_OF_CONDUCT.md (Contributor Covenant v2.1)
- SECURITY.md (vulnerability reporting policy)
- CHANGELOG.md (initial release notes)
- CODEOWNERS (per-type review ownership)

GitHub config:
- Issue templates: bug-report, pricing-correction, documentation
- FUNDING.yml (GitHub Sponsors)

Validation enhancements:
- Cross-reference check: hand [[requires]] → integration existence
- Routing alias collisions as warnings (errors with --strict)
- --strict flag to promote warnings to errors
- --type filter to validate single content type
- CI: add taplo format check and lychee link check jobs

Developer experience:
- Makefile with validate, fmt, and scaffold targets
- Scaffold templates for all 5 content types
- .pre-commit-config.yaml (trailing whitespace, TOML check, validate)
- docs/content-guide.md (naming, descriptions, prompts, decision guide)

Content quality:
- schema.toml: add last_verified field for model pricing
- CONTRIBUTING.md: add pricing verification guide with source links

templates/HAND.toml

@@ -0,0 +1,33 @@
+id = "{{NAME}}"
+name = "TODO: Display Name"
+description = "TODO: One-sentence description of what this hand does."
+category = "productivity"  # communication | content | data | development | devops | finance | productivity | research | social
+icon = "TODO"
+tools = ["shell_exec", "file_read", "file_write", "file_list", "memory_store", "memory_recall"]
+
+[routing]
+aliases = ["TODO: activation phrases"]
+weak_aliases = ["TODO: keyword hints"]
+
+[agent]
+name = "{{NAME}}-hand"
+description = "TODO: Agent description"
+module = "builtin:chat"
+provider = "default"
+model = "default"
+max_tokens = 8192
+temperature = 0.4
+max_iterations = 30
+system_prompt = """TODO: Write a detailed system prompt for the hand's agent.
+
+Define:
+- The hand's purpose and capabilities
+- Step-by-step workflow it follows
+- Tools it should use and how
+- Output format and reporting
+"""
+
+[metadata]
+frequency = "on-demand"  # continuous | on-demand | scheduled
+token_consumption = "medium"  # low | medium | high
+default_active = true

templates/agent.toml

@@ -0,0 +1,32 @@
+name = "{{NAME}}"
+version = "0.1.0"
+description = "TODO: One-sentence description of what this agent does."
+author = "TODO"
+module = "builtin:chat"
+
+[metadata.routing]
+aliases = ["TODO: exact match phrases"]
+weak_aliases = ["TODO: partial match keywords"]
+
+[model]
+provider = "default"
+model = "default"
+max_tokens = 4096
+temperature = 0.7
+system_prompt = """TODO: Write a clear system prompt that defines:
+- Who the agent is and its role
+- What it should and should not do
+- How it should format responses
+- Any domain-specific instructions
+
+Keep it focused and under 500 words."""
+
+[resources]
+max_llm_tokens_per_hour = 100000
+
+[capabilities]
+tools = ["web_search", "web_fetch", "memory_store", "memory_recall"]
+network = ["*"]
+memory_read = ["*"]
+memory_write = ["self.*"]
+agent_spawn = false

templates/integration.toml

@@ -0,0 +1,29 @@
+id = "{{NAME}}"
+name = "TODO: Service Display Name"
+description = "TODO: One-sentence description of this integration."
+category = "devtools"  # devtools | communication | storage | monitoring | data | productivity
+icon = "TODO"
+tags = ["TODO"]
+
+[transport]
+type = "stdio"
+command = "npx"
+args = ["-y", "TODO: @scope/mcp-server-package"]
+
+[[required_env]]
+name = "TODO_API_KEY"
+label = "TODO: API Key"
+help = "TODO: How to obtain this key"
+is_secret = true
+get_url = "https://example.com/settings"
+
+[health_check]
+interval_secs = 60
+unhealthy_threshold = 3
+
+setup_instructions = """
+TODO: Step-by-step setup instructions.
+1. Go to ...
+2. Create an API key with ...
+3. Paste the key above.
+"""

templates/provider.toml

@@ -0,0 +1,22 @@
+# TODO: Provider Name — https://example.com
+# Models: 1
+
+[provider]
+id = "{{NAME}}"
+display_name = "TODO: Provider Display Name"
+api_key_env = "TODO_API_KEY"
+base_url = "https://api.example.com/v1"
+key_required = true
+
+[[models]]
+id = "TODO-model-id"
+display_name = "TODO: Model Display Name"
+tier = "balanced"  # frontier | smart | balanced | fast | local
+context_window = 128000
+max_output_tokens = 4096
+input_cost_per_m = 0.0
+output_cost_per_m = 0.0
+supports_tools = true
+supports_vision = false
+supports_streaming = true
+aliases = []

templates/skill.toml

@@ -0,0 +1,20 @@
+[skill]
+name = "{{NAME}}"
+version = "0.1.0"
+description = "TODO: One-sentence description of what this skill does."
+author = "TODO"
+tags = ["TODO"]
+
+[runtime]
+type = "promptonly"
+
+[input]
+topic = { type = "string", description = "TODO: Describe this input parameter", required = true }
+
+[prompt]
+template = """TODO: Write the prompt template for this skill.
+
+Use {{topic}} to reference input parameters.
+
+Be specific about the desired output format and constraints.
+"""