Chain Patterns Overview Foundation patterns for CC 2.1.71 pipeline skills. This skill is loaded via the frontmatter field — it provides patterns that parent skills follow. Pattern 1: MCP Detection (ToolSearch Probe) Run BEFORE any MCP tool call. Probes are parallel and instant. Usage in phases: Load details: Pattern 2: Handoff Files Write structured JSON after every major phase. Survives context compaction and rate limits. Location: — numbered files for ordering, descriptive names for clarity. Load schema: Pattern 3: Checkpoint-Resume Read state at skill start. If found, skip completed phases…