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codebase-context

codebase-context is a skill for Claude Code from Barnett-Studios/cxpak. It costs 35 tokens per session (429 once invoked), scanned A, original, Apache-2.0.

A codebase overview tool that summarizes a software project’s files, folders, components, dependencies, key configuration, and recent Git activity. It creates this context with cxpak before an agent answers project-wide questions.

In plain words
What is it for?
Use it to understand project structure, architecture, component relationships, dependency paths, important files, and recent code changes.
Why use it?
It reduces the need to inspect many files manually when explaining how a project is organized or how its parts connect.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the cxpak plugin — 3 skills, 4 commands shipped together

not rated 32repo +1 13d ago A scan 35 tokens original Apache-2.0

Good fit Use it to understand project structure, architecture, component relationships, dependency paths, important files, and recent code changes.

Compare 6 skills from other repositories ↓
View source ↗ Barnett-Studios/cxpak
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Barnett-Studios/cxpak
Claude Code
/plugin install cxpak

Made for: Claude Code.

Or install cxpak, the plugin that ships this one along with the rest of its 3 skills, 4 commands.

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-context

README.md
[![agentmods](https://agentmods.dev/badge/skills/barnett-studios/cxpak/codebase-context/github.svg)](https://agentmods.dev/skills/barnett-studios/cxpak/codebase-context)
Your own site
<a href="https://agentmods.dev/skills/barnett-studios/cxpak/codebase-context"><img src="https://agentmods.dev/badge/skills/barnett-studios/cxpak/codebase-context/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-context

Your own site · 80×15
<a href="https://agentmods.dev/skills/barnett-studios/cxpak/codebase-context"><img src="https://agentmods.dev/badge/skills/barnett-studios/cxpak/codebase-context.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 429 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00035 $0.00429
Opus 5.5 $0.00014 $0.00172
Sonnet 5.5 $0.00007 $0.00086
Haiku 4.5 $0.00003 $0.00043

Measured 2mo ago against content hash 95be083cce5e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codebase-context 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.

plugin/skills/codebase-context/SKILL.md · 43 lines

What it actually says

Codebase Context via cxpak

When this skill is triggered, gather structured codebase context using cxpak before answering the user's question.

Steps

  1. Ask for token budget. Ask the user: "How large a context budget should I use? (default: 50k tokens)" If they don't specify, use 50k.

  2. Resolve the cxpak binary. Run the ensure-cxpak script to get the binary path:

    CXPAK="$("${CLAUDE_PLUGIN_ROOT}/lib/ensure-cxpak")"

  3. Run cxpak overview. Execute:

    "$CXPAK" overview --tokens <budget> --format markdown .

    Where <budget> is what the user specified (e.g., 50k, 100k, 20k).

  4. Use the output. The command outputs a structured codebase summary including:

    • Project metadata (file counts, languages, tokens)
    • Directory tree
    • Module/component map with public symbols
    • Dependency graph (import relationships)
    • Key files (README, configs, manifests)
    • Function/type signatures
    • Git context (recent commits, churn)

  5. Answer the user's question using the cxpak output as your primary source of codebase understanding.

  6. Mention the source. Tell the user that cxpak provided the structured codebase context, e.g., "Based on the cxpak overview of this repo..."

Important

  • Always use --format markdown — it's native to your context window.
  • If cxpak fails (not a git repo, no files found), fall back to standard file reading.
  • The overview may include .cxpak/ detail file pointers if the repo exceeds the budget — you can read those for deeper context.
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. 2mo ago First seen · 43 lines · 35 tokens per session scan A 95be083cce5e

Subscribe to this mod's changes

codebase-context is a skill published in the GitHub repository Barnett-Studios/cxpak (32 stars, last pushed 13d ago), licensed Apache-2.0. It adds 35 tokens to every session and 429 once invoked, about $0.0001 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 2026-08-30.

Debugging
Related

codebase-context compared with skills from other repositories

codebase-context next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
codebase-contextBarnett-Studios/cxpakSkill3213d agoApache-2.0A35Claude Code
systematic-debuggingopen-metadata/OpenMetadataSkill16kyesterdayApache-2.0A37Claude Code
log-error-digestzebbern/claude-code-guideSkill4.7k3d agoMITA71Claude Code, Codex
cwv-optimizeradobe/skillsSkill319yesterdayApache-2.0A112Claude Code
ci-fixersipyourdrink-ltd/bernsteinSkill1.2kyesterdayApache-2.0A15Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skillsSkill1.9k23d agoMITA36Claude Code
triaging-web-analytics-supportPostHog/posthogSkill41kyesterdaynoneA151Claude Code, Codex