A record of an agent's actions, decisions, timing, and results while it works on a task.

Use it to debug orchestration, inspect decision flow, troubleshoot failures, and measure performance at summary, standard, or detailed levels.

It makes agent behaviour easier to understand when a workflow fails, behaves unexpectedly, or runs slowly.

How junghwaYang/oh-my-codex configures Codex

Reuse

Borrowing it

Nothing to install: this file belongs to junghwaYang/oh-my-codex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/junghwaYang/oh-my-codex/main/.codex/skills/trace/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/junghwaYang/oh-my-codex

Made for: Codex.

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/junghwayang/oh-my-codex/trace/github.svg)](https://agentmods.dev/skills/junghwayang/oh-my-codex/trace)

Your own site

<a href="https://agentmods.dev/skills/junghwayang/oh-my-codex/trace"><img src="https://agentmods.dev/badge/skills/junghwayang/oh-my-codex/trace/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/junghwayang/oh-my-codex/trace"><img src="https://agentmods.dev/badge/skills/junghwayang/oh-my-codex/trace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 884 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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	$0.00000	$0.00884
Opus 5.5	$0.00000	$0.00354
Sonnet 5.5	$0.00000	$0.00177
Haiku 4.5	$0.00000	$0.00088

Measured 2mo ago against content hash ae43693e55f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

.codex/skills/trace/SKILL.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Trace Skill

Execution tracing and debugging for orchestration.

When to Use

Debugging agent behavior
Understanding decision flow
Performance profiling
Troubleshooting failures

Trace Levels

Level 1: Summary

[15:30:01] Task started: "Build auth system"
[15:30:05] Plan created: 5 subtasks
[15:35:22] All tasks completed
[15:35:23] Session ended: SUCCESS

Level 2: Standard

[15:30:01] PM: Received task "Build auth system"
[15:30:02] PM: Analyzing requirements...
[15:30:05] PM: Created plan with 5 subtasks
[15:30:06] PM: Delegating to Frontend (subtask 1)
[15:30:06] PM: Delegating to Backend (subtask 2)
[15:31:15] Frontend: Completed "Login form"
[15:32:30] Backend: Completed "Auth API"
...

Level 3: Verbose

[15:30:01.234] PM: Received task
  Input: "Build auth system"
  Context: {session: "abc123", mode: "autopilot"}
  
[15:30:02.456] PM: Calling model
  Model: o3
  Tokens: 1,234 (prompt) + 567 (completion)
  Latency: 2.3s
  
[15:30:05.789] PM: Plan generated
  Plan: {
    tasks: [
      {id: 1, description: "Login form", agent: "frontend"},
      ...
    ]
  }

Trace Output

Console

Real-time output to terminal

File

Written to ~/.codex/traces/{session_id}.log

Structured (JSON)

{
  "timestamp": "2026-02-13T15:30:01.234Z",
  "agent": "pm",
  "event": "task_received",
  "data": {
    "task": "Build auth system",
    "mode": "autopilot"
  }
}

Trace Events

Event	Description
`task_received`	Agent received a task
`task_delegated`	Task assigned to another agent
`task_started`	Agent began work
`task_completed`	Agent finished work
`task_failed`	Agent encountered error
`model_call`	LLM API called
`tool_used`	Tool executed
`decision`	Agent made decision

Analysis

Timeline View

PM          ████░░░░░░░░░░░░░░░░░░░░░░
Frontend    ░░░░████████░░░░░░░░░░░░░░
Backend     ░░░░████████████░░░░░░░░░░
Tester      ░░░░░░░░░░░░░░░░████░░░░░░
            0s  5s  10s 15s 20s 25s 30s

Read the full file on GitHub · 132 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.

2mo ago First seen · 132 lines · 0 tokens per session scan A ae43693e55f9

Subscribe to this mod's changes

trace is a skill published in the GitHub repository junghwaYang/oh-my-codex (5 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 884 tokens. 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.

Debugging

trace next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
tracejunghwaYang/oh-my-codex	Skill	5	8mo ago	MIT	A	0	Codex
systematic-debuggingopen-metadata/OpenMetadata	Skill	16k	today	Apache-2.0	A	37	Claude Code
log-error-digestzebbern/claude-code-guide	Skill	4.7k	today	MIT	A	71	Claude Code, Codex
cwv-optimizeradobe/skills	Skill	319	today	Apache-2.0	A	112	Claude Code
ci-fixersipyourdrink-ltd/bernstein	Skill	1.2k	today	Apache-2.0	A	15	Claude Code, Codex
diagnosing-missing-recordingsPostHog/posthog	Skill	41k	today	none	A	76	Claude Code, Codex
loop-engineeringhuytieu/COG-second-brain	Skill	1.3k	15d ago	MIT	A	63	Claude Code

oh-my-codex: Skill for Codex