opencodehub-exploring

A codebase exploration skill that helps trace how an unfamiliar repository works. It uses an indexed map of code to find concepts, symbols, relationships, and execution flows before opening source files.

In plain words
What is it for?
Use it to investigate architecture, authentication flows, database logic, request lifecycles, and callers of specific functions.
Why use it?
It reduces the time spent searching through unrelated files when learning a codebase. It can show what calls a function, where a request enters, and how a process 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/theagenticguy/opencodehub/opencodehub-exploring
Any agent
npx skills add theagenticguy/opencodehub --skill opencodehub-exploring
Clone the repo
git clone --depth 1 https://github.com/theagenticguy/opencodehub

Made for: Claude Code, Codex.

Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,306 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 $0.00064 $0.01306
Opus 5 $0.00032 $0.00653
Sonnet 5 $0.00013 $0.00261
Haiku 4.5 $0.00006 $0.00131

Measured yesterday against content hash e4951bd167db, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

opencodehub-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 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/skills/opencodehub-exploring/SKILL.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Exploring Codebases with OpenCodeHub

When to Use

  • "How does authentication work?"
  • "What's the project structure?"
  • "Where is the database logic?"
  • "Show me the request lifecycle."
  • Onboarding to a codebase you have not seen before.

Workflow

1. mcp__codehub__list_repos                              → Pick the repo name
2. READ codehub://repo/{name}/context                        → Stats + staleness envelope
3. mcp__codehub__query({query: "<concept>", repo})       → Hybrid BM25 + vector hits, grouped by process
4. mcp__codehub__context({name: "<symbol>", repo})       → 360-degree view, categorised edges, cochange side-section
5. mcp__codehub__sql for process traces                  → Step ordering from the relations table
6. Read source files only after the graph has pointed you at the hot spots

If the context envelope warns the index is stale, run codehub analyze in the terminal first.

Checklist

- [ ] mcp__codehub__list_repos — confirm the repo
- [ ] READ codehub://repo/{name}/context — check freshness
- [ ] mcp__codehub__query for the concept
- [ ] Scan returned processes (execution flows) before scanning files
- [ ] mcp__codehub__context on the strongest hit
- [ ] Inspect confidenceBreakdown — prefer confirmed edges for architectural claims
- [ ] Review cochanges as a secondary signal (git history, NOT call deps)
- [ ] Follow PROCESS_STEP edges via mcp__codehub__sql to trace the flow end-to-end
- [ ] Read source files for implementation detail only

Tools

mcp__codehub__query — hybrid BM25 + vector search, grouped by process

mcp__codehub__query({ query: "payment processing", repo: "my-app", limit: 20 })

→ results: ranked symbols with file path, kind, score
→ processes: execution flows that contain the top hits (populated when PROCESS_STEP edges exist)
→ next_steps: pointer to the next tool

Use it as the first broad read after the context resource. Prefer it over Grep for concept-level questions.

mcp__codehub__context — 360-degree view of a symbol

Read the full file on GitHub · 121 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. yesterday First seen · 121 lines · 64 tokens per session scan A e4951bd167db

Subscribe to this mod's changes

opencodehub-exploring is a skill published in the GitHub repository theagenticguy/opencodehub (3 stars, last pushed 20d ago), licensed Apache-2.0. It adds 64 tokens to every session and 1,306 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 2026-08-31.

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