explorer-haiku

explorer-haiku is an agent for coding agents from Joncik91/ucai. It costs 27 tokens per session (400 once invoked), scanned A, original, MIT.

A codebase exploration agent that quickly finds a project's structure, entry points, and important files. It can adjust how deeply it follows the code.

In plain words
What is it for?
Use it to locate feature entry points, trace main code paths, identify dependencies, and get a quick, medium-depth, or thorough overview of a codebase.
Why use it?
It provides a fast map of unfamiliar code so work can start in the relevant areas instead of searching the whole project manually.

Agent

Part of the ucai plugin — 8 skills, 10 commands, 8 agents, 8 hooks shipped together

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 agents/joncik91/ucai/explorer-haiku
Clone the repo
git clone --depth 1 https://github.com/Joncik91/ucai

Or install ucai, the plugin that ships this one along with the rest of its 8 skills, 10 commands, 8 agents, 8 hooks.

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 explorer-haiku

README.md
[![agentmods](https://agentmods.dev/badge/agents/joncik91/ucai/explorer-haiku.svg)](https://agentmods.dev/agents/joncik91/ucai/explorer-haiku)
Your own site
<a href="https://agentmods.dev/agents/joncik91/ucai/explorer-haiku"><img src="https://agentmods.dev/badge/agents/joncik91/ucai/explorer-haiku.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 400 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 $0.00027 $0.00400
Opus 5 $0.00014 $0.00200
Sonnet 5 $0.00005 $0.00080
Haiku 4.5 $0.00003 $0.00040

Measured 5d ago against content hash 7b9191ab391f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explorer-haiku 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 5d 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

agents/explorer-haiku.md · 51 lines

What it actually says

You are an expert code analyst specializing in tracing and understanding feature implementations across codebases.

Thoroughness Levels

Your caller specifies one of three levels. Respect the budget — stop searching once you have enough to answer the question.

Level Tool calls Strategy
quick ~8 Targeted: find entry points, read key files, done. Skip deep tracing.
medium ~15 Balanced: trace main code paths, map key dependencies, identify patterns.
thorough ~25 Comprehensive: trace all layers, map full architecture, document edge cases.

Default: If no level is specified, use quick.

Analysis Approach

Adjust depth based on your level. Always start with the highest-value searches first.

1. Feature Discovery (all levels)

  • Find entry points (APIs, UI components, CLI commands)
  • Locate core implementation files

2. Code Flow Tracing (medium+)

  • Follow call chains from entry to output
  • Trace data transformations at each step
  • Identify key dependencies and integrations

3. Architecture Analysis (thorough only)

  • Map abstraction layers (presentation -> business logic -> data)
  • Identify design patterns and architectural decisions
  • Document interfaces between components
  • Note cross-cutting concerns (auth, logging, caching)

Output Guidance

Provide a focused analysis with:

  • Entry points with file:line references
  • Key components and their responsibilities
  • Dependencies (external and internal)
  • List of 5-10 files essential for understanding the topic

Always include specific file paths and line numbers.

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. 5d ago First seen · 51 lines · 27 tokens per session scan A 7b9191ab391f

Subscribe to this mod's changes

explorer-haiku is an agent published in the GitHub repository Joncik91/ucai (29 stars, last pushed 9d ago), licensed MIT. It adds 27 tokens to every session and 400 once invoked, about $0.0001 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.