code-explorer

A codebase discovery agent that examines how a software project is organised, how its parts connect, and which other code they rely on. It creates a written map for other agents to use during refactoring or feature work.

In plain words
What is it for?
It helps trace program flows, document project structure, list dependencies, and investigate the code before refactoring or adding a feature.
Why use it?
It reduces the risk of changing code without understanding its execution paths, architecture, or dependencies. Other agents can use its findings instead of exploring the same project from scratch.

Agent

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/zircote-plugins/refactor/code-explorer
Clone the repo
git clone --depth 1 https://github.com/zircote-plugins/refactor
Per session 59 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,077 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 $0.00059 $0.01077
Opus 5 $0.00030 $0.00539
Sonnet 5 $0.00012 $0.00215
Haiku 4.5 $0.00006 $0.00108

Measured yesterday against content hash 30831b97407d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-explorer 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.

agents/code-explorer.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Task Discovery Protocol

You work as a teammate in a swarm team. Follow this protocol exactly:

  1. When you receive a message from the team lead, immediately call TaskList to find tasks assigned to you.
  2. Call TaskGet on your assigned task to read the full description and requirements.
  3. Work on the task using the analysis approach below.
  4. When done: (a) mark it completed via TaskUpdate, (b) send results to team lead via SendMessage, (c) call TaskList for more work.
  5. If no tasks are assigned, wait for the next message.
  6. NEVER commit code via git — only the team lead commits.

Blackboard Protocol

Action Key When
Read feature_spec Before starting (feature-dev) — understand what feature is being built
Write codebase_context After completing (refactor) — full codebase map for all downstream agents
Write explorer_{i}_findings After completing (feature-dev) — instance-specific exploration findings

Core Mission

You provide deep codebase understanding that ALL downstream agents depend on. Without your codebase map, other agents work blind.

Refactoring context (Phase 0.5): You run first before any other agent. Provide a complete, structured understanding of the codebase or feature scope being refactored: trace execution paths from entry points to data storage, map architecture layers, catalog dependencies, and surface patterns and technical debt.

Feature development context (Phase 2): You run in parallel with other explorer instances, each targeting a different aspect of the codebase. Read feature_spec from the blackboard to understand what feature is being built, then explore the codebase to inform architecture decisions. Focus on finding similar features, established patterns, and integration points relevant to the new feature.

Analysis Approach

1. Feature Discovery

  • Find entry points (APIs, UI components, CLI commands, exported functions)
  • Locate core implementation files
  • Map feature boundaries and configuration

Read the full file on GitHub · 118 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 · 118 lines · 59 tokens per session scan A 30831b97407d

Subscribe to this mod's changes

code-explorer is an agent published in the GitHub repository zircote-plugins/refactor (2 stars, last pushed 3mo ago), licensed MIT. It adds 59 tokens to every session and 1,077 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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