ph-debug

ph-debug is a skill for Claude Code, Codex from jyt6640/persona-harness. It costs 25 tokens per session (195 once invoked), scanned A, original, Apache-2.0.

A guided process for investigating reproducible failures or unexpected behaviour in software.

In plain words
What is it for?
Reproducing a failure, testing possible causes, fixing the confirmed cause, and adding a focused regression test when useful.
Why use it?
It keeps debugging focused on confirmed causes instead of guesses or broad code changes. It also helps prevent the same problem from returning.

Skill for Claude CodeCodex

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 skills/jyt6640/persona-harness/debug
Any agent
npx skills add jyt6640/persona-harness --skill debug
Clone the repo
git clone --depth 1 https://github.com/jyt6640/persona-harness

Made for: Claude Code, 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.

agentmods badge for ph-debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/jyt6640/persona-harness/debug.svg)](https://agentmods.dev/skills/jyt6640/persona-harness/debug)
Your own site
<a href="https://agentmods.dev/skills/jyt6640/persona-harness/debug"><img src="https://agentmods.dev/badge/skills/jyt6640/persona-harness/debug.svg" alt="Measured on agentmods" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 195 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 5.1 $0.00025 $0.00195
Opus 5 $0.00013 $0.00097
Sonnet 5 $0.00005 $0.00039
Haiku 4.5 $0.00003 $0.00019

Measured yesterday against content hash 33f8ac0e2b84, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

ph-debug 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 yesterday.

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.

packages/host-plugins/antigravity/skills/debug/SKILL.md · 23 lines

What it actually says

(PH) Debug

This adapter exposes the canonical Persona Harness skill to this host only. Discovery alone does not authorize workflow, shell, network, GitHub, authority, evidence, or external actions.

Debug

Reproduce the observed failure, form bounded hypotheses, and fix only the confirmed cause. Add a focused regression where appropriate and avoid turning an investigation into automatic workflow progression or a broad refactor.

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. yesterday Changed · +9 lines · +4 tokens per session 33f8ac0e2b84
  2. 5d ago First seen · 14 lines · 21 tokens per session scan A e2591bf6b225

Subscribe to this mod's changes

ph-debug is a skill published in the GitHub repository jyt6640/persona-harness (23 stars, last pushed 2d ago), licensed Apache-2.0. It adds 25 tokens to every session and 195 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 2026-08-30.