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 skills add ccarvalho-eng/codex-elixir-phoenix --skill elixir-phoenix-tidewave-integrationgit clone --depth 1 https://github.com/ccarvalho-eng/codex-elixir-phoenixWrote 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/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-tidewave-integration)<a href="https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-tidewave-integration"><img src="https://agentmods.dev/badge/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-tidewave-integration.svg" alt="Measured on agentmods" 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 | $0.00026 | $0.00906 |
| Opus 5 | $0.00013 | $0.00453 |
| Sonnet 5 | $0.00005 | $0.00181 |
| Haiku 4.5 | $0.00003 | $0.00091 |
Grade A, and why
elixir-phoenix-tidewave-integration 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 8d 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.
curl -s http://localhost:4000/tidewave/mcp \ How it starts
The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tidewave MCP Integration
Runtime intelligence for Phoenix apps via MCP. Prefer Tidewave tools over Bash when available.
Iron Laws — Never Violate These
- DEV ONLY — Never use Tidewave tools in production contexts. Avoid on shared dev servers with production data copies
- PREFER TIDEWAVE OVER BASH —
mcp__tidewave__get_docs>web_fetch,execute_sql_query>psql - CHECK AVAILABILITY FIRST — Use
/mcpcommand or detectmcp__tidewave__tools - SQL IS READ-HEAVY — Use
execute_sql_queryfor SELECT, be careful with mutations - EXACT VERSIONS —
get_docsreturns docs for YOUR mix.lock versions, not latest
Quick Reference
| Task | Tidewave Tool | Fallback |
|---|---|---|
| Get docs | mcp__tidewave__get_docs Module.func/3 |
web_fetch hexdocs.pm/... |
| Run code | mcp__tidewave__project_eval |
mix run -e "code" |
| SQL query | mcp__tidewave__execute_sql_query |
psql $DATABASE_URL |
| Find source | mcp__tidewave__get_source_location |
grep -rn "defmodule" |
| Inspect DOM | mcp__Tidewave-Web__browser_eval |
Manual browser inspection |
| List schemas | mcp__tidewave__get_ecto_schemas |
Read lib/*/schemas/ |
| Read logs | mcp__tidewave__get_logs level: :error |
tail -f log/dev.log |
Detection
# Check endpoint
curl -s http://localhost:4000/tidewave/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"ping"}'
Or use /mcp in Codex to see connected servers.
Essential Patterns
Test Function Immediately
# mcp__tidewave__project_eval
MyApp.Accounts.create_user(%{email: "[email protected]"})
Verify Migration
-- mcp__tidewave__execute_sql_query
SELECT column_name, data_type FROM information_schema.columns
WHERE table_name = 'users';
Debug LiveView (with PID from browser)
# mcp__tidewave__project_eval
pid = pid("0.1234.0")
:sys.get_state(pid) |> Map.get(:socket) |> Map.get(:assigns) |> Map.keys()
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.
- 8d ago First seen · 103 lines · 26 tokens per session scan A 07b8194928a8
elixir-phoenix-tidewave-integration is a skill published in the GitHub repository ccarvalho-eng/codex-elixir-phoenix (11 stars, last pushed 4mo ago), licensed MIT. It adds 26 tokens to every session and 906 once invoked, about $0.0001 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.
Other skills, from other repositories
elixir-expert
Expert-level Elixir, Phoenix, OTP, and concurrent systems. Use when the user mentions Phoenix, OTP, Erlang, concurrent, or functional, or when the task involves Elixir Fundamentals or Phoenix Framework.
ash-framework
Use this skill working with Ash Framework or any of its extensions. Always consult this when making any domain changes, features or fixes.
phoenix-framework
Use this skill working with Phoenix Framework. Consult this when working with the web layer, controllers, views, liveviews etc.
phoenix
Use when building an Elixir web app with Phoenix — contexts, Ecto schemas, changesets and migrations, LiveView, channels and PubSub, the generators, and the boundary between domain logic and the web layer. Covers the classic LiveView over-rendering and Ecto N+1 traps. NOT pure OTP work with no web or Ecto layer …
stripe-projects
Use after E2B sandbox/API access has been provisioned through Stripe Projects and the user needs to use the resulting E2B API key with the E2B CLI, JavaScript SDK, Python SDK, or Code Interpreter SDK.
printing-press-amend
Amend a published CLI from one of two input sources: (1) dogfood mode mines the active Claude Code session transcript for friction (missing flags, hand- rolled API payloads, silent-null returns); (2) direct-input mode accepts user-supplied asks (rename a command, add commands or feeds, fix a named bug, optionally…