start

start is a skill for Claude Code from oliver-kriska/claude-elixir-phoenix. It costs 57 tokens per session (1,768 once invoked), scanned A, original, MIT.

A static review agent for ported Elixir code. It looks for code that mechanically copies the old application, rebuilds framework internals, ignores the accepted architecture, or loses important guarantees.

In plain words
What is it for?
Use it during rewrite verification to inspect changed files against the architecture, ledger, contracts, and known translation problems. It reports findings without compiling, running the application, or touching databases.
Why use it?
A rewrite can compile and pass ordinary quality checks while still preserving the wrong structure or behavior from the legacy system. This review focuses specifically on rewrite-related drift rather than general Elixir style.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the rewrite plugin — 5 skills, 7 agents shipped together

Good fit Use it during rewrite verification to inspect changed files against the architecture, ledger, contracts, and known translation problems. It reports findings without compiling, running the application, or touching databases.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/oliver-kriska/claude-elixir-phoenix/start
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 start
Clone the repo
git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

Made for: Claude Code.

Or install rewrite, the plugin that ships this one along with the rest of its 5 skills, 7 agents.

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 start

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/start"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/start.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,768 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 $0.00057 $0.01768
Opus 5.5 $0.00023 $0.00707
Sonnet 5.5 $0.00011 $0.00354
Haiku 4.5 $0.00006 $0.00177

Measured today against content hash bc925138c05f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

start 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 today.

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.

plugins/rewrite/skills/start/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rewrite Start — Entry, Resume, Status

The front door of the rewrite workflow. It explains the method once, finds where an existing rewrite stands, checks that the legacy source has not changed underneath it, and routes to the next phase.

/rewrite:start → /rewrite:analyze → /rewrite:architect → /rewrite:roadmap
                                                             ↓ per slice
                         /rewrite:verify ← /phx:work ← /phx:plan

Iron Laws

  1. ONE PHASE AT A TIME — route to the next phase; with --auto, chain only analyze → architect → roadmap
  2. IDENTITY BEFORE RESUME — compare the source snapshot before trusting earlier artifacts
  3. STATE COMES FROM FILES — read .claude/rewrite/ and the ledger script, never memory of a previous session
  4. --auto STOPS AT DECISIONS — it never approves ASSUMED choices, never starts /phx:work, never deploys or touches production data
  5. LEGACY STAYS READ-ONLY — never write into or execute the source app

Workflow

1. Check dependencies and detect state

If the phx:plan skill is not in this session's skill list, tell the user to install elixir-phoenix from the marketplace that provided rewrite (/plugin install elixir-phoenix@oliver-kriska, or that marketplace's name), then run /reload-plugins. Without it the architect consults and the /phx:plan handoff fail, so --auto stops after analyze.

ls .claude/rewrite/ .claude/rewrite/architecture/ 2>/dev/null && sed -n '1,40p' .claude/rewrite/status.md
python3 "${CLAUDE_SKILL_DIR}/../architect/scripts/ledger.py" check --rewrite-dir .claude/rewrite  # once architecture.md exists

Read the first matching row, top to bottom. An active slice comes before seeding a new one:

Found State Next
nothing new step 2, then /rewrite:analyze <path>
phase analyzing, or an analysis/*.md missing analyze incomplete /rewrite:analyze <Source path>
analysis/*.md, no ADR-000 analyzed /rewrite:architect
ADR-000, no architecture.md architect incomplete /rewrite:architect (resumes at step 4)
ADR-000 + architecture.md, but decisions.md or divergences.md missing, phase architecting, or ledger.py check fails architect incomplete /rewrite:architect (resumes at step 4 or 5)
ADR-000 + architecture.md + decisions.md + divergences.md, clean ledger, no roadmap.md architected /rewrite:roadmap
a slice planned or in-progress whose plan.md has at least one - [x] and no - [ ] awaiting gate /rewrite:verify NN
a slice planned or in-progress building /phx:work .claude/plans/{slug}/plan.md, then /rewrite:verify NN
roadmap.md with ready or seeded slices slicing /rewrite:roadmap --next
every slice done complete release rehearsal slice, or close out

Read the full file on GitHub · 131 lines

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. today First seen · 131 lines · 57 tokens per session scan A bc925138c05f

Subscribe to this mod's changes

start is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (567 stars, last pushed today), licensed MIT. It adds 57 tokens to every session and 1,768 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-17.

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