deep-dive

deep-dive is a skill for Claude Code, Codex from jmstar85/oh-my-githubcopilot. It costs 40 tokens per session (507 once invoked), scanned A, a copy of deep-dive, MIT.

A two-stage investigation process: first trace why a problem happened, then interview the user to define what should be done.

In plain words
What is it for?
Use it for deep bug investigations, exploring uncertain feature ideas, testing possible causes, and turning findings into clearer requirements.
Why use it?
It helps when the cause of a bug or improvement opportunity is unclear and prevents requirements from being based on guesses.

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/jmstar85/oh-my-githubcopilot/deep-dive
Any agent
npx skills add jmstar85/oh-my-githubcopilot --skill deep-dive
Clone the repo
git clone --depth 1 https://github.com/jmstar85/oh-my-githubcopilot

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 deep-dive

README.md
[![agentmods](https://agentmods.dev/badge/skills/jmstar85/oh-my-githubcopilot/deep-dive.svg)](https://agentmods.dev/skills/jmstar85/oh-my-githubcopilot/deep-dive)
Your own site
<a href="https://agentmods.dev/skills/jmstar85/oh-my-githubcopilot/deep-dive"><img src="https://agentmods.dev/badge/skills/jmstar85/oh-my-githubcopilot/deep-dive.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 507 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 94% copy Near-identical to another mod 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 $0.00040 $0.00507
Opus 5 $0.00020 $0.00253
Sonnet 5 $0.00008 $0.00101
Haiku 4.5 $0.00004 $0.00051

Measured 5d ago against content hash dd58bf0db3cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

deep-dive 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 5d 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.

Origin

This is a copy

94% identical to deep-dive — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.github/skills/deep-dive/SKILL.md · 55 lines

What it actually says

Deep Dive

Orchestrates a 2-stage pipeline: first investigate WHY something happened (trace), then define WHAT to do about it (deep-interview). Trace findings feed into the interview via 3-point injection.

Pipeline

deep-diveralplan (consensus refinement) → omg-autopilot (execution)

When to Use

  • User has a problem but doesn't know the root cause
  • Bug investigation: "Something broke and I need to figure out why"
  • Feature exploration: "I want to improve X but first need to understand it"

When NOT to Use

  • Already know the root cause → use /deep-interview
  • Clear specific request → execute directly
  • Investigation only, no requirements → use /trace

Phases

Phase 1: Initialize

  1. Parse problem, detect brownfield/greenfield
  2. Generate 3 trace lane hypotheses (code-path, config/env, measurement/artifact)

Phase 2: Lane Confirmation

Present hypotheses to user for confirmation (1 round).

Phase 3: Trace Execution

Run 3 parallel tracer lanes using @tracer agents:

  • Each lane: evidence for, evidence against, critical unknown, discriminating probe
  • Rebuttal round between top hypotheses
  • Convergence detection
  • Save to .omg/specs/deep-dive-trace-{slug}.md

Phase 4: Interview with Trace Injection

Follow deep-interview protocol with 3 overrides:

  1. initial_idea enrichment: Include trace's most likely explanation
  2. codebase_context replacement: Use trace synthesis (skip re-exploration)
  3. question queue injection: Per-lane critical unknowns become first questions

Low-confidence trace: don't inject uncertain conclusion, use ALL unknowns as questions.

Phase 5: Execution Bridge

Same options as deep-interview: ralplan → omg-autopilot (recommended), omg-autopilot, ralph, team, or refine further.

Output

Spec saved to .omg/specs/deep-dive-{slug}.md with additional "Trace Findings" section.

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. 5d ago First seen · 55 lines · 40 tokens per session scan A dd58bf0db3cc

Subscribe to this mod's changes

deep-dive is a skill published in the GitHub repository jmstar85/oh-my-githubcopilot (153 stars, last pushed 3mo ago), licensed MIT. It adds 40 tokens to every session and 507 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to deep-dive, differing in 4 lines, and is treated as a copy.

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