Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add oliver-kriska/claude-elixir-phoenix/plugin install phxWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/full)<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/full"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/full/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/full"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/full.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00050 | $0.02058 |
| Opus 5.5 | $0.00020 | $0.00823 |
| Sonnet 5.5 | $0.00010 | $0.00412 |
| Haiku 4.5 | $0.00005 | $0.00206 |
Grade B, and why
full scanned grade B with 1 finding 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 18d 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.
Subtle steeringmediumPrompt injection
Instructions that bias recommendations or shape behaviour without the user noticing.
Never tell the user to set an environment variable just to make `/phx:full` How it starts
The opening of the file, as written. The whole thing — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Full Phoenix Feature Development
Execute complete Elixir/Phoenix feature development autonomously: research patterns, plan with specialist agents, implement with verification, Elixir code review. Cycles back automatically if review finds issues.
Usage
/phx:full Add user authentication with magic links
/phx:full Real-time notification system with Phoenix PubSub
/phx:full Background job processing for email campaigns --max-cycles 5
/phx:full Add magic-link auth --codex
Wrong input guard: if the argument is a path to an existing plan file
(.claude/plans/*/plan.md), do NOT re-plan it. Say so and run /phx:work {path}
instead — the plan phase already happened.
Flags
--codex— Codex CLI joins the review panel on every review cycle, matching/phx:review --codex.- Requires the
codexCLI. A missing CLI degrades to a SKIPPED note — the cycle never fails. - Consensus findings (flagged by a Claude agent and codex) are marked HIGH CONFIDENCE.
Workflow Overview
┌──────────────────────────────────────────────────────────────────┐
│ /phx:full {feature} │
├──────────────────────────────────────────────────────────────────┤
│ │
│ ┌────────┐ ┌────────┐ ┌────────┐ ┌────────┐ ┌────────┐ ┌────────┐ │
│ │Discover│→ │ Plan │→ │ Work │→ │ Verify │→ │ Review │→ │Compound│→Done│
│ │ Assess │ │[Pn-Tm] │ │Execute │ │ Full │ │4 Agents│ │Capture │ │
│ │ Decide │ │ Phases │ │ Tasks │ │ Loop │ │Parallel│ │ Solve │ │
│ └───┬────┘ └────────┘ └────────┘ └───┬────┘ └────────┘ └────────┘ │
│ │ ↑ │ ↑ │ │
│ ├── "just do it" ────────────┤ │ │ │ │
│ ├── "plan it" ──┐ │ ↓ │ │ │
│ │ ↓ │ ┌────────┐│ │ │
│ │ ┌──────────────┐ │ │Fix ││ ┌─────────┐ │ │
│ │ │ PLANNING │ │ │Issues │└─│ Fix │←┘ │
│ │ └──────────────┘ │ └───┬────┘ │ Review │ │
│ │ │ ↓ │ Findings│ │
│ │ ┌────┴─────────┐ └────┬────┘ │
│ │ │ VERIFYING │←──────┘ │
│ └── "research it" ─────┘ (re-verify) │
│ (comprehensive plan) │
│ │
│ On Completion: │
│ Auto-compound: Capture solved problems → .claude/solutions/ │
│ Auto-suggest: /phx:document → /phx:learn-from-fix │
│ │
└──────────────────────────────────────────────────────────────────┘
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 18d ago Changed · -3 lines e2697e42e721
- 1mo ago First seen · 164 lines · 50 tokens per session scan B 4841c1d71329
full is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (567 stars, last pushed yesterday), licensed MIT. It adds 50 tokens to every session and 2,058 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 1 finding (subtle steering). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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