codeindex-exploring

A codebase exploration guide for finding how a software project is organised and how its parts connect. It uses an index of the code to trace functions, components, callers, and execution paths.

In plain words
What is it for?
Use it to understand architecture, find database or authentication logic, see what calls a function, and follow a complete execution flow.
Why use it?
It reduces the time spent searching through unfamiliar code and helps explain how a request moves through the system.

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/getklai/klai/codeindex-exploring
Any agent
npx skills add GetKlai/klai --skill codeindex-exploring
Clone the repo
git clone --depth 1 https://github.com/GetKlai/klai

Made for: Claude Code, Codex.

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 734 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00054 $0.00734
Opus 5 $0.00027 $0.00367
Sonnet 5 $0.00011 $0.00147
Haiku 4.5 $0.00005 $0.00073

Measured 2d ago against content hash e551e5961789, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codeindex-exploring 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 2d 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.

.claude/skills/codeindex/codeindex-exploring/SKILL.md · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Exploring Codebases with CodeIndex

When to Use

  • "How does authentication work?"
  • "What's the project structure?"
  • "Show me the main components"
  • "Where is the database logic?"
  • Understanding code you haven't seen before

Workflow

1. READ codeindex://repos                          → Discover indexed repos
2. READ codeindex://repo/{name}/context             → Codebase overview, check staleness
3. codeindex_query({query: "<what you want to understand>"})  → Find related execution flows
4. codeindex_context({name: "<symbol>"})            → Deep dive on specific symbol
5. READ codeindex://repo/{name}/process/{name}      → Trace full execution flow

In Conductor worktrees, "Index is stale" can be an overlay/canonical-checkout mismatch. Use scripts/codeindex-health.sh; only run scripts/codeindex-health.sh --repair when it reports the shared base index is stale. Verify branch-local code with source files/diffs.

Checklist

- [ ] READ codeindex://repo/{name}/context
- [ ] codeindex_query for the concept you want to understand
- [ ] Review returned processes (execution flows)
- [ ] codeindex_context on key symbols for callers/callees
- [ ] READ process resource for full execution traces
- [ ] Read source files for implementation details

Resources

Resource What you get
codeindex://repo/{name}/context Stats, staleness warning (~150 tokens)
codeindex://repo/{name}/clusters All functional areas with cohesion scores (~300 tokens)
codeindex://repo/{name}/cluster/{name} Area members with file paths (~500 tokens)
codeindex://repo/{name}/process/{name} Step-by-step execution trace (~200 tokens)

Tools

codeindex_query — find execution flows related to a concept:

Read the full file on GitHub · 82 lines

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. 2d ago First seen · 82 lines · 54 tokens per session scan A e551e5961789

Subscribe to this mod's changes

codeindex-exploring is a skill published in the GitHub repository GetKlai/klai (11 stars, last pushed 2d ago), licensed MIT. It adds 54 tokens to every session and 734 once invoked, about $0.0003 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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