phx-boundaries
Analyze Phoenix context boundaries and module coupling via mix xref. Use when checking cross-context calls, validating dependencies, before splitting modules, or reviewing architecture.
npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-boundaries --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.
# Phoenix Context Boundary Validation Analyze module dependencies to ensure clean context separation and proper architectural boundaries. ## Usage ``` phx-boundaries # Check for violations phx-boundaries --assess # Score context health (0-100) phx-boundaries --fix # Suggest fixes for violations ``` ## `--assess` Mode: Context Health Score Evaluate overall boundary health with a quantified score. ### Metrics Calculated | Metric | Healthy Range | Red Flag | Weight | |--------|---------------|----------|--------| | Modules per context | 3-15 | >20 or <2 | 20% | | Public API surface | 5-30 funcs | >40 funcs | 15% | | Fan-out (contexts called) | 1-4 | >6 | 20% | | Fan-in (called by contexts) | 1-6 | >10 | 15% | | Circular dependencies | 0 | >0 | 15% | | Boundary violations | 0 | >0 | 15% | ### Commands for Assessment Use Glob to count `.ex` files per context directory under `lib/my_app/*/`. Use Grep to count public function definitions per context file under `lib/my_app/*.ex`. Run `mix xref graph --format stats` for dependency analysis. Run `mix xref graph --format cycles --label compile` for compile-time circular dependencies. ### Output Format ```markdown ## Context Health Assessment
- Usage
- --assess Mode: Context Health Score
- Metrics Calculated
- Commands for Assessment
- Output Format
- Iron Laws - Never Violate These
- Dependency Rules
- Analysis Commands
- Check Compile Dependencies
- Find What Depends on a Context
- Find What a Module Calls
- Check for Circular Dependencies
- Red Flags to Detect
- Boundary Verification Process
What does the phx-boundaries skill do?
Analyze Phoenix context boundaries and module coupling via mix xref. Use when checking cross-context calls, validating dependencies, before splitting modules, or reviewing architecture.
How do I install it?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-boundaries --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 oliver-kriska/claude-elixir-phoenix, a repository with 515 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.