trace

trace is a command for Claude Code from Generous-Corp/pulp. It costs 29 tokens per session (1,156 once invoked), scanned A, original, MIT.

A performance tracing tool built around Perfetto trace files. Perfetto is a tool for recording and inspecting timed events so you can see where an application spends time.

In plain words
What is it for?
Use it to record or inspect GPU, DSP, rendering, layout, and startup traces, query saved .pftrace files, and correlate UI hitches with related events.
Why use it?
It turns a vague report that something is slow into queryable timing evidence, while keeping tracing intended for development rather than shipped plugins.

Command for Claude Code

Part of the pulp plugin — 63 skills, 30 commands, 3 hooks, 1 MCP server 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 commands/generous-corp/pulp/trace
Clone the repo
git clone --depth 1 https://github.com/Generous-Corp/pulp

Made for: Claude Code.

Or install pulp, the plugin that ships this one along with the rest of its 63 skills, 30 commands, 3 hooks, 1 MCP server.

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 trace

README.md
[![agentmods](https://agentmods.dev/badge/commands/generous-corp/pulp/trace.svg)](https://agentmods.dev/commands/generous-corp/pulp/trace)
Your own site
<a href="https://agentmods.dev/commands/generous-corp/pulp/trace"><img src="https://agentmods.dev/badge/commands/generous-corp/pulp/trace.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 1,156 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 $0.01156
Opus 5 $0.00015 $0.00578
Sonnet 5 $0.00006 $0.00231
Haiku 4.5 $0.00003 $0.00116

Measured today against content hash b57e63a2a52e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

trace 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.

.claude/commands/trace.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Answer "why is this slow?" from Perfetto evidence. Offline .pftrace analysis is usable today. Live lifecycle control is broker-authorized and fail-closed.

Tracing is a dev-only tool. Never ship a plugin with PULP_TRACING enabled.

Five paths (pick by what you have)

You have Path Tool
Authorized control session + want a DSP flamegraph Experimental live trace Start/stop through canonical control
An A3 GPU startup trace + bounded question Named A2T analysis /trace gpu-startup|gpu-health|gpu-probe --trace FILE.pftrace
A .pftrace + a question Query pulp trace query "<sql>" --trace FILE.pftrace
Want to hand an agent / human the raw file Return the path pulp trace stop prints it; open in ui.perfetto.dev
A UI hitch to correlate Frame trace + motion join trace render,layout while a motion trace runs; query on shared trace_id

Experimental live path

# The broker must authorize a trusted control session.

# 2. Start a session, reproduce the slow thing, then stop. Use the same exact
# broker-owned instance ID for both lifecycle calls when selecting explicitly.
pulp trace start --instance INSTANCE_ID --categories dsp,render
# ... trigger the suspect interaction / open the editor ...
pulp trace stop --instance INSTANCE_ID
# → /tmp/pulp-<ts>.pftrace

# 3. Query the flushed file. For a narrated answer, load trace-analysis and
# use its trace-sql queries over this same file.
pulp trace query "SELECT name, dur FROM slice ORDER BY dur DESC LIMIT 20" \
  --trace /tmp/pulp-trace.pftrace

Named A2T GPU analysis

Use the slash command with one exact bounded question; it delegates to the same typed installed analysis surface used by the CLI/MCP parity receipt:

/trace gpu-startup --trace /tmp/pulp.pftrace
/trace gpu-health --trace /tmp/pulp.pftrace
/trace gpu-probe --trace /tmp/pulp.pftrace

The underlying reproducible commands are:

pulp trace gpu-startup --trace /tmp/pulp.pftrace --json
pulp trace gpu-health  --trace /tmp/pulp.pftrace --json
pulp trace gpu-probe   --trace /tmp/pulp.pftrace --json
pulp trace open /tmp/pulp.pftrace

Read the full file on GitHub · 107 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 · 107 lines · 29 tokens per session scan A b57e63a2a52e

Subscribe to this mod's changes

trace is a command published in the GitHub repository Generous-Corp/pulp (16 stars, last pushed today), licensed MIT. It adds 29 tokens to every session and 1,156 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 2026-09-04.