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 HorizonRobotics/OE-Skills --skill j6-ucp-perfetto-trace-catchergit clone --depth 1 https://github.com/HorizonRobotics/OE-SkillsWrote 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/horizonrobotics/oe-skills/j6-ucp-perfetto-trace-catcher)<a href="https://agentmods.dev/skills/horizonrobotics/oe-skills/j6-ucp-perfetto-trace-catcher"><img src="https://agentmods.dev/badge/skills/horizonrobotics/oe-skills/j6-ucp-perfetto-trace-catcher/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.
<a href="https://agentmods.dev/skills/horizonrobotics/oe-skills/j6-ucp-perfetto-trace-catcher"><img src="https://agentmods.dev/badge/skills/horizonrobotics/oe-skills/j6-ucp-perfetto-trace-catcher.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00120 | $0.02515 |
| Opus 5 | $0.00060 | $0.01257 |
| Sonnet 5 | $0.00024 | $0.00503 |
| Haiku 4.5 | $0.00012 | $0.00251 |
Grade A, and why
j6-ucp-perfetto-trace-catcher 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 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.
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.
How it starts
The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
UCP Trace Catcher
Capture Perfetto-based UCP traces from a remote J6 development board and bring them back to the X86 host for analysis.
What this skill does
Automates the full lifecycle of UCP Perfetto trace capture:
- Transfer config files to the dev board
- Set up the trace environment and run the application
- Pull the captured trace back to the host
- Tell the user what to do next
Only Perfetto trace is in scope — ignore DSP trace and Chrome trace.
Never modify original files in this skill's directory. Copy config files to a temp location under the local current workspace (pwd), edit the copy there, then transfer.
Before starting
You need the following information from the user. Ask for anything not provided:
| Parameter | Description | Example |
|---|---|---|
board_ip |
IP address or hostname of the dev board | 192.168.1.100 |
board_user |
SSH username for the board (default: root if not specified, do not use local username) |
root |
work_dir |
Directory on the board where the UCP app runs | /userdata/ucp_test |
mode |
in_process or system |
system |
enable_bpu |
Whether to capture BPU trace (system mode only, default: false) |
false |
output_name |
Desired trace filename (default: ucp.pftrace) |
my_trace.pftrace |
app_command |
The UCP application command to run | ./hrt_model_exec perf --model_file model.hbm --frame_count 1000 --thread_num 8 |
If mode is not specified, ask the user:
- in_process: captures only UCP process-internal trace (track_event). Does NOT support thread scheduling states, ftrace, memory stats, process stats, or BPU trace. No daemon needed. Good for UCP scheduling logic analysis.
- system: captures UCP trace + thread scheduling states (ftrace), memory stats, and process stats by default (uses
ucp_system.cfg). When BPU trace is enabled, the sameucp_system.cfgis used but BPU trace is additionally turned on via sysfs commands; BPU trace data will appear alongside ftrace data. Needs tracebox daemons. Use system mode when you need system-level visibility beyond UCP internals.
What ships with it
6 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.
- 12d ago First seen · 195 lines · 120 tokens per session scan A 991a1aad09c8
j6-ucp-perfetto-trace-catcher is a skill published in the GitHub repository HorizonRobotics/OE-Skills (19 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 120 tokens to every session and 2,515 once invoked, about $0.0006 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 2026-08-30.
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