open-fdd: Skill for Claude Code

.agents/skills/codebase-research-pass/SKILL.md

codebase-research-pass is a skill for Claude Code, Codex from bbartling/open-fdd. It costs 50 tokens per session (1,176 once invoked), scanned A, original, no licence file.

A structured investigation of an unfamiliar or complex codebase before planning, reviewing, or editing it. It maps the code, ownership, dependencies, tests, and risks.

In plain words
What is it for?
Use it to produce an evidence-based research brief about a codebase before making decisions or changes.
Why use it?
It reduces guesswork when you need to understand how a project is organised and where changes may have side effects.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is bbartling/open-fdd's own configuration. It tells Claude Code and Codex how to work on open-fdd itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything open-fdd configures →

Reuse

Borrowing it

Nothing to install: this file belongs to bbartling/open-fdd. 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/bbartling/open-fdd/master/.agents/skills/codebase-research-pass/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/bbartling/open-fdd

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 codebase-research-pass

README.md
[![agentmods](https://agentmods.dev/badge/skills/bbartling/open-fdd/codebase-research-pass/github.svg)](https://agentmods.dev/skills/bbartling/open-fdd/codebase-research-pass)
Your own site
<a href="https://agentmods.dev/skills/bbartling/open-fdd/codebase-research-pass"><img src="https://agentmods.dev/badge/skills/bbartling/open-fdd/codebase-research-pass/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.

agentmods 80×15 button for codebase-research-pass

Your own site · 80×15
<a href="https://agentmods.dev/skills/bbartling/open-fdd/codebase-research-pass"><img src="https://agentmods.dev/badge/skills/bbartling/open-fdd/codebase-research-pass.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,176 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 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 $0.00050 $0.01176
Opus 5.5 $0.00020 $0.00470
Sonnet 5.5 $0.00010 $0.00235
Haiku 4.5 $0.00005 $0.00118

Measured 1mo ago against content hash adb7987ab79d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codebase-research-pass 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 1mo 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.

.agents/skills/codebase-research-pass/SKILL.md · 121 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

2 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.

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. 1mo ago First seen · 121 lines · 50 tokens per session scan A adb7987ab79d

Subscribe to this mod's changes

codebase-research-pass is a skill published in the GitHub repository bbartling/open-fdd (175 stars, last pushed today), with no licence file. It adds 50 tokens to every session and 1,176 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-01.

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