Development tools for Phoenix, the web framework for the Elixir programming language. Tidewave connects an AI coding assistant to a running Phoenix application through MCP, a standard way for tools to exchange information.

Use it to set up Tidewave, connect it to Phoenix, inspect Ecto database schemas, query SQL, read logs and version-specific documentation, locate source code, and evaluate Elixir code.

It lets the assistant inspect the live application and use documentation, source locations, logs, database queries, and code execution without relying on broad web searches or shell sessions.

tidewave — Skill for Claude Code by vinnie357

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 vinnie357/claude-skills --skill tidewave

Clone the repo

git clone --depth 1 https://github.com/vinnie357/claude-skills

Made for: Claude Code.

Or install elixir, the plugin that ships this one along with the rest of its 9 skills, 1 agent.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vinnie357/claude-skills/tidewave/github.svg)](https://agentmods.dev/skills/vinnie357/claude-skills/tidewave)

Your own site

<a href="https://agentmods.dev/skills/vinnie357/claude-skills/tidewave"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/tidewave/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vinnie357/claude-skills/tidewave"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/tidewave.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,073 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00049	$0.02073
Opus 5	$0.00024	$0.01037
Sonnet 5	$0.00010	$0.00415
Haiku 4.5	$0.00005	$0.00207

Measured 12d ago against content hash 35f50ab07add, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

tidewave scanned grade A 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 12d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

See `references/mcp-setup.md` for verbatim setup commands and JSON config for **Claude Code, Codex CLI, Gemini CLI, and opencode**, an unverified Cursor/VS Code/Zed config table, plus a `curl` ping for raw verification a

plugins/languages/elixir/skills/tidewave/SKILL.md · 216 lines

How it starts

The opening of the file, as written. The whole thing — 216 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tidewave MCP Dev Tools

Tidewave is a dev tool by Dashbit that connects AI coding assistants to running Phoenix applications via the Model Context Protocol (MCP). It exposes runtime introspection tools: Ecto schemas, code execution, documentation lookup, log inspection, and SQL queries.

Current version: ~> 0.5 (v0.5.6 released 2026-03-13 — adds :extra_apps plug option)

When connected, prefer MCP tools over web fetches

When Tidewave MCP is connected to an Elixir/Phoenix project, route documentation, source, and runtime queries through the MCP tools — not WebFetch or hexdocs.pm.

get_docs instead of WebFetch on hexdocs.pm/<package>/<Module>.html
search_package_docs instead of broader hex-doc searches
get_source_location instead of reading deps/<package>/lib/... with Read
execute_sql_query instead of shelling into psql
project_eval instead of running iex -S mix snippets

Why: MCP tool calls return results pinned to the exact versions in the project's mix.lock, complete in a single round-trip, and skip HTML→markdown conversion and page chrome — significantly fewer tokens per lookup than WebFetch, and the answer is guaranteed to match the running app rather than whatever version is on hexdocs.pm today.

Using tidewave in tier prompts

When a worker in a staged pipeline interacts with unfamiliar dependencies, the lead's prompt to that worker MUST explicitly direct the worker to verify dep APIs via tidewave MCP tools before stubbing or implementing.

Add this block to Tier 2 (test author) and Tier 3 (implementer) prompts when the work touches a dep not already exercised in the codebase:

## Module docs via tidewave (PREFERRED over WebFetch or guessing)

For unfamiliar deps, verify the actual API surface via tidewave MCP before stubbing or implementing:

- `mcp__tidewave-<app>__search_package_docs` (q: "<ModuleName>") — keyword search across installed package docs
- `mcp__tidewave-<app>__get_docs` (module: "<Module>", function: "<func>") — full docstrings for a specific function

Particularly important for: <list the specific deps this tier touches>.

Tidewave hits the running BEAM's loaded modules — it returns what is ACTUALLY in the dep, not what the model remembers from training data. Guessing produces code that does not compile or behaves wrong; tidewave produces code matching the real API surface.

Read the full file on GitHub · 216 lines

Files

What ships with it

1 file 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.

references/mcp-setup.md 4.2 KB

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.

12d ago First seen · 216 lines · 49 tokens per session scan A 35f50ab07add

Subscribe to this mod's changes

tidewave is a skill published in the GitHub repository vinnie357/claude-skills (25 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 2,073 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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tidewave