cdc-analysis
Specialized skill for clock domain crossing analysis and synchronizer design in FPGA designs
npx skills add a5c-ai/babysitter --skill cdc-analysis --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# CDC Analysis Skill ## Overview Expert skill for Clock Domain Crossing (CDC) analysis and synchronizer design, ensuring metastability-safe multi-clock FPGA designs. ## Capabilities - Identify all clock domain crossings in RTL - Design 2FF and 3FF synchronizers with ASYNC_REG - Implement Gray code counters for async FIFOs - Design handshake protocols (req-ack, valid-ready) - Calculate MTBF for synchronizers - Generate CDC constraints (set_false_path, set_max_delay) - Detect CDC violations (reconvergence, data stability) - Support Xilinx CDC-aware design flows ## Target Processes - cdc-design.js - reset-strategy.js - clock-network-design.js - timing-constraints.js ## Usage Guidelines ### Synchronizer Types - **2FF Synchronizer**: Standard single-bit synchronization (MTBF > 100 years typical) - **3FF Synchronizer**: High-reliability applications - **Pulse Synchronizer**: Edge detection across domains - **Handshake Synchronizer**: Multi-bit data with control signals ### FIFO Design - Use Gray code for pointer crossing - Ensure proper empty/full flag generation - Consider almost-empty/almost-full for flow control - Apply correct FIFO depth calculation ### Constraint Guidelines - `set_f
- Overview
- Capabilities
- Target Processes
- Usage Guidelines
- Synchronizer Types
- FIFO Design
- Constraint Guidelines
- CDC Violations to Detect
- Dependencies
What does the cdc-analysis skill do?
Specialized skill for clock domain crossing analysis and synchronizer design in FPGA designs
How do I install it?
Run `npx skills add a5c-ai/babysitter --skill cdc-analysis --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From a5c-ai/babysitter, a repository with 1,642 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.