investigate-debug

investigate-debug is a skill for Claude Code from bfollington/terma. It costs 101 tokens per session (1,190 once invoked), scanned A, original, CC-BY-SA-4.0.

An investigation and debugging skill for finding the cause of a failure, regression, intermittent problem, performance issue, incident, or report that does not match observed behaviour.

In plain words
What is it for?
Use it to diagnose broken tests, flaky behaviour, slow code, production incidents, regressions, or unexpected user reports.
Why use it?
It keeps the investigation focused on the difference between what is happening and what is believed to be happening, instead of guessing at fixes.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the terma plugin — 18 skills, 6 agents 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 skills/bfollington/terma/investigate-debug
Any agent
npx skills add bfollington/terma --skill investigate-debug
Clone the repo
git clone --depth 1 https://github.com/bfollington/terma

Made for: Claude Code.

Or install terma, the plugin that ships this one along with the rest of its 18 skills, 6 agents.

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 investigate-debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/bfollington/terma/investigate-debug.svg)](https://agentmods.dev/skills/bfollington/terma/investigate-debug)
Your own site
<a href="https://agentmods.dev/skills/bfollington/terma/investigate-debug"><img src="https://agentmods.dev/badge/skills/bfollington/terma/investigate-debug.svg" alt="Measured on agentmods" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,190 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00101 $0.01190
Opus 5 $0.00051 $0.00595
Sonnet 5 $0.00020 $0.00238
Haiku 4.5 $0.00010 $0.00119

Measured 6d ago against content hash d9983584b04d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

investigate-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 6d 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/terma/skills/investigate-debug/SKILL.md · 78 lines

The source is not reproduced here

Licensed CC-BY-SA-4.0

The repository is licensed CC-BY-SA-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 6d ago First seen · 78 lines · 101 tokens per session scan A d9983584b04d

Subscribe to this mod's changes

investigate-debug is a skill published in the GitHub repository bfollington/terma (51 stars, last pushed 7d ago), licensed CC-BY-SA-4.0. It adds 101 tokens to every session and 1,190 once invoked, about $0.0005 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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