chore: sync workflow templates

[stranske]

Sync Summary

Files Updated

• agents-guard.yml: Agents guard - enforces agents workflow protections (Health 45)
• maint-76-claude-code-review.yml: Claude Code review (opt-in) - runs only on labeled PRs or manual dispatch
• check_agents_md_freshness.py: Warns when the generated Orchestrator AGENTS.md playbook section cites stale repo paths or commands
• reference_packs.py: Validates and resolves reference pack configuration for shared runner prompt assembly
• orchestrator_skill.py: Validates and resolves exported Orchestrator skill context for remote Codex lanes
• runner_lib/ (1 files): Shared runner prompt assembly, output parsing, and dispatch debounce helpers
• langchain_client.py: LangChain client builder - multi-provider client with slot-based fallback and configuration
• llm_registry.py: LLM model registry helper - shared slot/model selection and blocked-model enforcement

Files Skipped

• pr-00-gate.yml: File exists and sync_mode is create_only
• ci.yml: File exists and sync_mode is create_only
• renovate.json: File exists and sync_mode is create_only
• cross-repo-smoke.yml: File exists and sync_mode is create_only
• llm_slots.json: None

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Review Checklist

• CI passes with updated workflows
• No repo-specific customizations were overwritten

Source: stranske/Workflows
Source SHA: 6f2b9df2c694c746ec71a1cd20fdcf6460754b6f
Template hash: b288cbd7cfbf
Sync branch: sync/workflows-b288cbd7cfbf
Consumer repo: stranske/Collab-Admin
Manifest: .github/sync-manifest.yml

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: f2604375-0333-4bbe-a979-5c7626481b99

📥 Commits

Reviewing files that changed from the base of the PR and between 6066047 and fdbfd30.

📒 Files selected for processing (8)

• .github/workflows/agents-guard.yml
• .github/workflows/maint-76-claude-code-review.yml
• scripts/check_agents_md_freshness.py
• scripts/orchestrator_skill.py
• scripts/reference_packs.py
• scripts/runner_lib/core.py
• tools/langchain_client.py
• tools/llm_registry.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sync/workflows-b288cbd7cfbf

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