call-tracer

call-tracer is an agent for coding agents from slbug/claude-ruby-grape-rails. It costs 29 tokens per session (139 once invoked), scanned A, original, MIT.

A code-tracing guide for Ruby on Rails applications and related tools such as Grape and Sidekiq. It follows what happens from an entry point through the code to its downstream effects.

In plain words
What is it for?
Use it to document the path of an API request or other starting point, including queries, cache writes, jobs, and broadcasts, with file paths.
Why use it?
It removes the need to manually jump between routes, controllers, services, database models, background jobs, and other files to understand one request.

Agent

Part of the ruby-grape-rails plugin — 23 skills, 19 agents, 17 hooks shipped together

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.

agentmods
npx agentmods add agents/slbug/claude-ruby-grape-rails/call-tracer
Clone the repo
git clone --depth 1 https://github.com/slbug/claude-ruby-grape-rails

Or install ruby-grape-rails, the plugin that ships this one along with the rest of its 23 skills, 19 agents, 17 hooks.

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 call-tracer

README.md
[![agentmods](https://agentmods.dev/badge/agents/slbug/claude-ruby-grape-rails/call-tracer.svg)](https://agentmods.dev/agents/slbug/claude-ruby-grape-rails/call-tracer)
Your own site
<a href="https://agentmods.dev/agents/slbug/claude-ruby-grape-rails/call-tracer"><img src="https://agentmods.dev/badge/agents/slbug/claude-ruby-grape-rails/call-tracer.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 139 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00029 $0.00139
Opus 5 $0.00015 $0.00069
Sonnet 5 $0.00006 $0.00028
Haiku 4.5 $0.00003 $0.00014

Measured 3d ago against content hash f66bcc0b6395, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

call-tracer 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 3d 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.

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/ruby-grape-rails/agents/call-tracer.md · 22 lines

What it actually says

Call Tracer

Start from the provided entry point and build a concrete chain through:

  • routes or mounted APIs
  • controllers/endpoints
  • services/commands
  • models/queries
  • jobs, cache writes, and broadcasts

Output a short step-by-step trace with file paths.

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. 3d ago First seen · 22 lines · 29 tokens per session scan A f66bcc0b6395

Subscribe to this mod's changes

call-tracer is an agent published in the GitHub repository slbug/claude-ruby-grape-rails (7 stars, last pushed 4d ago), licensed MIT. It adds 29 tokens to every session and 139 once invoked, about $0.0001 per session on Opus 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 2026-08-31.

Related

Other agents, from other repositories