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.
npx agentmods add skills/stefan-stepzero/shipkit/shipkit-codebase-indexnpx skills add stefan-stepzero/shipkit --skill shipkit-codebase-indexgit clone --depth 1 https://github.com/stefan-stepzero/shipkitWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00031 | $0.02629 |
| Opus 5 | $0.00015 | $0.01314 |
| Sonnet 5 | $0.00006 | $0.00526 |
| Haiku 4.5 | $0.00003 | $0.00263 |
Grade A, and why
shipkit-codebase-index 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.
How it starts
The opening of the file, as written. The whole thing — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
shipkit-codebase-index - Codebase Navigation Index
Purpose: Generate a lightweight index so Claude can navigate your codebase without wasteful exploration.
When to Invoke
User triggers:
- "Index the codebase"
- "Create a project map"
- "Generate codebase index"
Auto-suggested when:
- Session hook detects no index exists
- Index is older than 14 days
Process
Completion Tracking (MANDATORY)
Before starting analysis, create tasks for each index section:
TaskCreate: "Run generator script (base index)"TaskCreate: "Detect framework"TaskCreate: "Identify entry points"TaskCreate: "Map concepts to files (with verification)"TaskCreate: "Identify core files (with import counts)"TaskCreate: "Determine skip list"TaskCreate: "Write completed codebase-index.json"TaskCreate: "Verify all 5 Claude-filled fields are populated"
Rules:
TaskUpdateeach task tocompletedonly after the section has verified data (not guesses)- The final verification task requires reading the written file and confirming: framework, entryPoints, concepts, coreFiles, and skip are all non-empty
- Do NOT declare done if any field is empty or contains placeholder values
Step 1: Run Generator Script
python ${CLAUDE_SKILL_DIR}/scripts/generate_index.py
Script provides (100% reliable data):
scripts— from package.jsonrecentlyActive— files from git history (last 14 days)directories— which common directories existconfigFiles— which config files exist
Script leaves empty (Claude fills in):
frameworkentryPointsconceptscoreFilesskip
Step 2: Claude Analyzes and Completes Index
Read the generated index, then fill in the empty fields.
USE SUBAGENT FOR CONCEPT MAPPING - Launch Explore subagent for efficient parallel scanning:
Agent tool with subagent_type: "Explore"
Prompt: "Scan codebase to build navigation index. Find and report:
1. FRAMEWORK: Check for next.config.*, vite.config.*, nuxt.config.*, etc.
2. ENTRY POINTS: Find main app entry, layout, API routes directory, database schema
3. CONCEPTS: Map these concepts to files:
- auth: files handling authentication, sessions, login
- database: db connections, models, schema
- payments: billing, subscriptions, checkout
- api: API route handlers
- components: reusable UI components
4. CORE FILES: Files imported by 5+ other files (high fan-in)
For each concept, list the actual file paths found.
For core files, include import count."
What ships with it
3 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.
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.
- yesterday First seen · 291 lines · 31 tokens per session scan A 2072daab7a68
shipkit-codebase-index is a skill published in the GitHub repository stefan-stepzero/shipkit (1 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 2,629 once invoked, about $0.0002 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 2026-08-31.
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