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phx-brief

phx-brief is a skill for Claude Code from oliver-kriska/claude-elixir-phoenix. It costs 32 tokens per session (1,151 once invoked), scanned B, a copy of brief, MIT.

An interactive guide to an Elixir or Phoenix implementation plan. It explains the plan's reasoning, data-structure decisions, and component choices in a short walkthrough.

In plain words
What is it for?
Use it to review a new plan or understand work that has already been completed, including its supporting decisions and artifacts.
Why use it?
It helps developers understand why a plan is shaped a certain way before they approve or implement it.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions subagents; names the AskUserQuestion tool.

not rated 542repo +4 4d ago B scan 32 tokens copy · 86% MIT

Good fit Use it to review a new plan or understand work that has already been completed, including its supporting decisions and artifacts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/oliver-kriska/claude-elixir-phoenix/phx-brief
View source ↗ oliver-kriska/claude-elixir-phoenix phxagents.dev
Install

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.

Any agent
npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-brief
Clone the repo
git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

Made for: Claude Code.

Wrote 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.

agentmods badge for phx-brief

README.md
[![agentmods](https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-brief/github.svg)](https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-brief)
Your own site
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-brief"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-brief/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.

agentmods 80×15 button for phx-brief

Your own site · 80×15
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-brief"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-brief.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,151 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00032 $0.01151
Opus 5 $0.00016 $0.00575
Sonnet 5 $0.00006 $0.00230
Haiku 4.5 $0.00003 $0.00115

Measured 6d ago against content hash c7e648e8c988, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

phx-brief 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 6d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Use Glob to find `.claude/plans/*/plan.md` and pick the most recent.
Origin

This is a copy

86% identical to brief — 27 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

targets/amp/skills/phx-brief/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Briefing

Interactive walkthrough of a plan's reasoning, decisions, and solution shape. Designed for developers who need to understand a plan in 1-2 minutes instead of reading the full document.

Why This Exists

Plans answer "what to do" but bury "why." This skill bridges that gap with an interactive walkthrough.

Usage

phx-brief                                    # Latest plan
phx-brief .claude/plans/user-auth/plan.md    # Specific plan

Arguments

  • $ARGUMENTS = Path to plan file (optional, auto-detects latest)

Mode Detection

Read the plan file and determine mode from phase statuses:

  • All phases [PENDING] = Pre-work briefing (what WILL happen)
  • Any phase [COMPLETED] or [IN_PROGRESS] = Post-work briefing (what WAS done and why)

Execution Flow

Step 1: Locate and Load Plan

  1. If $ARGUMENTS has a path, use it

  2. Otherwise, find latest plan:

    Use Glob to find .claude/plans/*/plan.md and pick the most recent.

  3. If no plan found, tell user and suggest phx-plan

  4. Read the plan file

Step 2: Load Supporting Artifacts

Read what's available (don't fail if missing):

  • .claude/plans/{slug}/summaries/consolidated.md (research summary)
  • .claude/plans/{slug}/scratchpad.md (decisions, dead-ends)
  • .claude/plans/{slug}/progress.md (work log, post-work only)

Step 3: Present Briefing Sections

Present ONE section at a time, wrapped in the visual briefing block (see references/briefing-guide.md Visual Formatting).

The section MUST be emitted as visible response text BEFORE the AskUserQuestion call. Content composed only in thinking/reasoning is invisible to the user, and the question field is too short to carry it. If the user would see only a "Continue?" dialog, the section was never shown. Write the ★ Briefing block as normal output first, then ask:

  • If sections remain: question "Continue the briefing?" with options "Next: {title}", "Ask me a question about this", "Stop here"
  • If final section: no question needed, show closing message

Read the full file on GitHub · 147 lines

Files

What ships with it

2 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.

Changes

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.

  1. 6d ago First seen · 147 lines · 32 tokens per session scan B c7e648e8c988

Subscribe to this mod's changes

phx-brief is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (542 stars, last pushed 4d ago), licensed MIT. It adds 32 tokens to every session and 1,151 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). It is 86% identical to brief, differing in 27 lines, and is treated as a copy.

Claude CodeLearning and teachingPlanningautomationclaudeclaude-code-pluginclaude-code-skillsclaude-skills
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