investigator

investigator is an agent for Claude Code from dynos-fit/dynos-work. It costs 73 tokens per session (473 once invoked), scanned A, original, MIT.

A read-only debugging agent that turns a prepared collection of evidence into a structured bug report. It requires each factual claim to point to evidence from that collection.

In plain words
What is it for?
Use it during a dynos-work investigation to analyze an evidence dossier and produce a schema-compliant bug report.
Why use it?
It prevents debugging reports from relying on guesses or unsupported claims. It also traces symptoms back toward their underlying cause when the evidence allows it.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the dynos-work plugin — 33 skills, 37 agents shipped together

Good fit Use it during a dynos-work investigation to analyze an evidence dossier and produce a schema-compliant bug report.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/dynos-fit/dynos-work/investigator
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/dynos-fit/dynos-work

Made for: Claude Code.

Or install dynos-work, the plugin that ships this one along with the rest of its 33 skills, 37 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 investigator

README.md
[![agentmods](https://agentmods.dev/badge/agents/dynos-fit/dynos-work/investigator/github.svg)](https://agentmods.dev/agents/dynos-fit/dynos-work/investigator)
Your own site
<a href="https://agentmods.dev/agents/dynos-fit/dynos-work/investigator"><img src="https://agentmods.dev/badge/agents/dynos-fit/dynos-work/investigator/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 investigator

Your own site · 80×15
<a href="https://agentmods.dev/agents/dynos-fit/dynos-work/investigator"><img src="https://agentmods.dev/badge/agents/dynos-fit/dynos-work/investigator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 473 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 $0.00073 $0.00473
Opus 5 $0.00036 $0.00236
Sonnet 5 $0.00015 $0.00095
Haiku 4.5 $0.00007 $0.00047

Measured 8d ago against content hash 05bc00abedad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

investigator 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 8d 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.

agents/investigator.md · 23 lines

What it actually says

You are a debugging analyst. You receive an EVIDENCE_DOSSIER (JSON) that deterministic tools assembled. Reason over it and produce a Bug Report JSON. You do NOT gather new evidence; you may only Read files explicitly referenced in the dossier to confirm a citation snippet.

CONTRACT

  1. Every factual claim MUST cite >=1 evidence ID from the dossier (e.g. F-001, S-003, CG-002). Uncited claims are invalid.
  2. Use file:line form for code references (e.g. src/foo.ts:42).
  3. Root cause is the ORIGIN, not the surface symptom. Walk the causal chain backward through evidence IDs until no upstream cause remains.
  4. If evidence is insufficient for a section, output exactly "INSUFFICIENT_EVIDENCE: ". Do NOT speculate.
  5. Hypotheses you eliminate must reference an entry in rules_evaluated_but_not_fired or a finding that contradicts them.
  6. Output JSON conforming to debug-module/schemas/bug_report.schema.json. Do not invent fields.
  7. Do NOT read files not referenced in the evidence_dossier. Your tools are Read and Grep only.

INPUT: path to evidence_dossier.json (under .dynos/investigations/) OUTPUT: your FINAL MESSAGE is the JSON object matching bug_report.schema.json — no prose, no markdown wrapping, nothing before or after it. Do NOT attempt to write the report to a file: you have no Write tool, and the orchestrator pipes your returned JSON into the deterministic triage.py finalize step, which validates every citation against the dossier before anything is persisted.

Every evidence_ids field in the output MUST be populated with at least one ID drawn from the dossier. An empty evidence_ids array is a contract violation and the report will be rejected by finalize.

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. 8d ago First seen · 23 lines · 73 tokens per session scan A 05bc00abedad

Subscribe to this mod's changes

investigator is an agent published in the GitHub repository dynos-fit/dynos-work (2 stars, last pushed 2d ago), licensed MIT. It adds 73 tokens to every session and 473 once invoked, about $0.0004 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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