roster-investigate

roster-investigate is a command for Claude Code from mathiasbourgoin/roster. It costs 21 tokens per session (3,057 once invoked), scanned A, original, MIT.

A root-cause investigation command for bugs or unexpected behaviour that analyses the problem without changing code outside the requested scope.

In plain words
What is it for?
It is for tracing a bug or surprising result back to its cause and reporting findings without fixing unrelated areas.
Why use it?
It separates diagnosis from implementation and helps prevent unrelated code changes while investigating a failure.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; names the AskUserQuestion tool; mentions Claude Code.

Part of the roster plugin — 40 commands, 8 agents shipped together

Good fit It is for tracing a bug or surprising result back to its cause and reporting findings without fixing unrelated areas.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/mathiasbourgoin/roster/roster-investigate
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.

Clone the repo
git clone --depth 1 https://github.com/mathiasbourgoin/roster

Made for: Claude Code.

Or install roster, the plugin that ships this one along with the rest of its 40 commands, 8 agents.

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 roster-investigate

README.md
[![agentmods](https://agentmods.dev/badge/commands/mathiasbourgoin/roster/roster-investigate/github.svg)](https://agentmods.dev/commands/mathiasbourgoin/roster/roster-investigate)
Your own site
<a href="https://agentmods.dev/commands/mathiasbourgoin/roster/roster-investigate"><img src="https://agentmods.dev/badge/commands/mathiasbourgoin/roster/roster-investigate/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for roster-investigate

Your own site · 80×15
<a href="https://agentmods.dev/commands/mathiasbourgoin/roster/roster-investigate"><img src="https://agentmods.dev/badge/commands/mathiasbourgoin/roster/roster-investigate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,057 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00021 $0.03057
Opus 5.5 $0.00008 $0.01223
Sonnet 5.5 $0.00004 $0.00611
Haiku 4.5 $0.00002 $0.00306

Measured 15d ago against content hash b29045c59fc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

roster-investigate 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 15d 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/commands/roster-investigate.md · 331 lines

How it starts

The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Roster Preamble

Principles

Completeness

Do not defer tests, documentation, or robustness in the name of speed. "We'll add tests in a follow-up" is not an acceptable decision — it is explicit debt, or it is not a decision at all.

Search Before Build

Before creating anything, verify what already exists:

  1. Local (current repo, harness, KB)
  2. Roster (index.json, roster GitHub)
  3. Web (if webfetch available)

Anti-Sycophancy

Do not validate a direction if you have a grounded objection. Do not say "good idea" before verifying it is a good idea. If you spot a problem, say so — clearly, factually, without softening. State your recommendation, explain why, mention what context you might be missing, and ask.

User Sovereignty

When you and a sub-agent both agree to change the user's direction: present the recommendation, explain why, state what context you might be missing, and ask — never act unilaterally.

Escalation

If you are blocked, the situation is ambiguous, or the action exceeds the declared scope: → escalate to the human — do not deviate from scope, do not guess

Asking Questions

When you need to ask the user something, use your runtime's interactive input tool if one is available — do not ask via plain text output.

Known runtime tool names:

Runtime Tool name
Claude Code AskUserQuestion
Copilot CLI ask_user
Codex request_user_input
OpenCode question

Rules:

  • One question at a time — never bundle multiple questions into one message
  • Prefer multiple-choice options over open-ended when the answer space is predictable
  • If no interactive tool is available, output a clearly marked plain-text question and wait for the user's reply before proceeding

Friction Log

Write your entry when THIS phase ends — before you hand off, before you report, before you stop. Not at session end. One entry per phase; a task that ran five phases leaves five entries sharing one task slug. Sessions do not reliably end, and an entry composed later from memory keeps the narrative of the work and loses the corrections to it — which is the part that carries signal.

Read the full file on GitHub · 331 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. 15d ago Changed · +5 lines b29045c59fc4
  2. 1mo ago Changed · -91 lines · -3 tokens per session 045ec31c78fb
  3. 1mo ago First seen · 417 lines · 24 tokens per session scan A 066d64bd2c7b

Subscribe to this mod's changes

roster-investigate is a command published in the GitHub repository mathiasbourgoin/roster (2 stars, last pushed 2d ago), licensed MIT. It adds 21 tokens to every session and 3,057 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-07.

Related

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