Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/oliver-kriska/claude-elixir-phoenix/plugin-dev-workflownpx skills add oliver-kriska/claude-elixir-phoenix --skill plugin-dev-workflowgit clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenixWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00059 | $0.01063 |
| Opus 5 | $0.00030 | $0.00531 |
| Sonnet 5 | $0.00012 | $0.00213 |
| Haiku 4.5 | $0.00006 | $0.00106 |
Grade A, and why
plugin-dev-workflow scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Plugin Development Workflow
This repo is the Elixir/Phoenix Claude Code plugin. When editing plugin files, follow this workflow to ensure quality.
Before You Start
Run make help to see all available commands:
make eval # Quick: lint + score changed skills/agents
make eval-all # Full: all 51 skills + 26 agents
make eval-fix # Auto-fix + show failures
make test # 220 pytest tests for eval framework and port tooling
make ci # Full CI pipeline
Scoring Individual Files (CLI)
IMPORTANT: Always use -m module syntax, never run scorer.py directly.
# Score ONE skill (use -m, NOT direct file path)
python3 -m lab.eval.scorer plugins/elixir-phoenix/skills/verify/SKILL.md
# Score ONE skill with pretty output
python3 -m lab.eval.scorer plugins/elixir-phoenix/skills/verify/SKILL.md --pretty
# Score all skills
python3 -m lab.eval.scorer --all
# Score ONE agent
python3 -m lab.eval.agent_scorer plugins/elixir-phoenix/agents/verification-runner.md
# Score all agents
python3 -m lab.eval.agent_scorer --all
make ci # Full CI pipeline
When Editing Skills (plugins/elixir-phoenix/skills/*/SKILL.md)
- Read CLAUDE.md conventions (size limits, frontmatter requirements)
- Make your changes
- Run
make eval— it auto-detects changed skills and scores them - If FAIL: check the dimension that failed, fix it
- Run
make lintto verify markdown formatting - Commit
Skill requirements (eval checks all of these):
- Frontmatter: name, description, effort. Description must start with action verb + include "Use when..."
- Iron Laws section with 1+ numbered items
- Under 185 lines (command skills) or 150 lines (reference skills)
- No section exceeds 45 lines
- All
/phx:references point to existing skills - All
references/*.mdpaths exist - No dangerous code patterns outside Iron Laws sections
- Code examples present (1+ fenced code blocks)
- "Use when..." in description (for trigger accuracy)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 118 lines · 59 tokens per session scan A 29c66fd5e7e4
plugin-dev-workflow is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (535 stars, last pushed 6d ago), licensed MIT. It adds 59 tokens to every session and 1,063 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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