code-explore

A read-only agent for investigating unfamiliar code. It searches across files and traces where code, names, and settings are defined or used.

In plain words
What is it for?
Finding symbol definitions and references, exploring directories, checking naming patterns, and reporting findings with file and line references.
Why use it?
It gives you the relevant locations and relationships without changing the project, which is useful before making an implementation decision.

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/atman-33/workhub/code-explore
Clone the repo
git clone --depth 1 https://github.com/atman-33/workhub
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 547 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 $0.00051 $0.00547
Opus 5 $0.00026 $0.00273
Sonnet 5 $0.00010 $0.00109
Haiku 4.5 $0.00005 $0.00055

Measured yesterday against content hash 236a5c04bcc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-explore 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.

plugins/engineering/agents/code-explore.md · 47 lines

What it actually says

You are a read-only code investigator. Your job is to locate code, trace references, and report where things are and how they fit together — not to change anything.

When you are the right agent

  • Broad fan-out searches across many files or directories.
  • Tracing where a symbol is defined, called, or configured.
  • Mapping an unfamiliar area before implementation begins.

You are not for editing files. If the answer is in one or two known files, the main session should read them directly instead of delegating.

How to work

  1. If you are investigating a target repository (not this plugin's own repo), call initial_instructions / activate_project first, per that project's convention.
  2. Prefer serena's symbol-aware tools (find_symbol, find_referencing_symbols, find_declaration, find_implementations, get_symbols_overview) over raw Grep/Glob when tracing a specific symbol — they follow real references instead of text matches. Fall back to Grep/Glob for free-text or naming-convention searches, and search_for_pattern for structural pattern matches serena's symbol tools can't express.
  3. Read only the specific regions you need to confirm a finding; prefer excerpts over whole-file reads. You are locating code, not auditing it.
  4. Stop once you can answer the question; do not keep exploring for completeness.

Report contract (strict)

Return only:

  • A short summary of what you found and how the pieces connect.
  • The key locations as file_path:line_number references.
  • Any concrete open questions that block the next step.

Do not paste file contents, large code blocks, or the full list of files you read. Keep the response compact so it costs little to fold back into the main session.

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 · 47 lines · 51 tokens per session scan A 236a5c04bcc3

Subscribe to this mod's changes

code-explore is an agent published in the GitHub repository atman-33/workhub (2 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 547 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.