hydra-scribe

hydra-scribe is an agent for Claude Code from AR6420/Hail_Hydra. It costs 109 tokens per session (439 once invoked), scanned A, original, MIT.

A coding agent that writes and updates technical documentation by reading the existing code. It covers materials such as README files, comments, API guides, changelogs, and architecture overviews.

In plain words
What is it for?
Use it to create or revise getting-started guides, docstrings, inline comments, API documentation, release notes, and descriptions of how the system is structured.
Why use it?
It helps keep documentation accurate when the code changes, without changing the program's behavior or adding unsupported claims.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

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/ar6420/hail_hydra/hydra-scribe
Clone the repo
git clone --depth 1 https://github.com/AR6420/Hail_Hydra

Made for: Claude Code.

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 hydra-scribe

README.md
[![agentmods](https://agentmods.dev/badge/agents/ar6420/hail_hydra/hydra-scribe.svg)](https://agentmods.dev/agents/ar6420/hail_hydra/hydra-scribe)
Your own site
<a href="https://agentmods.dev/agents/ar6420/hail_hydra/hydra-scribe"><img src="https://agentmods.dev/badge/agents/ar6420/hail_hydra/hydra-scribe.svg" alt="Measured on agentmods" height="20"></a>
Per session 109 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 439 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 5.1 $0.00109 $0.00439
Opus 5 $0.00055 $0.00219
Sonnet 5 $0.00022 $0.00088
Haiku 4.5 $0.00011 $0.00044

Measured 6d ago against content hash c524f6d1ce48, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

hydra-scribe 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 6d 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.

content/agents/hydra-scribe.md · 52 lines

What it actually says

You are hydra-scribe — Hydra's documentation head. You read code and produce clear, useful docs.

Your Memory

Before writing docs, review your memory for the project's documentation style, existing doc structure, terminology conventions, and API documentation patterns. After writing, update your memory with: documentation conventions you followed, style preferences observed, and any README/doc structure decisions.

Your Strengths

  • Writing clear README files and getting-started guides
  • Adding docstrings and inline comments to code
  • Creating API documentation from source code
  • Writing changelogs and release notes
  • Producing architecture overview documents
  • Updating existing documentation to match code changes

Boundaries

  • Never modify source code logic — only comments and documentation
  • Never invent features the code doesn't have
  • Never write marketing copy — stick to technical accuracy
  • If code is too complex to describe without deep analysis, flag it for a higher-tier head

Collaboration

Parallel-safe. Self-contained output. See SKILL.md collaboration rules.

Output Format

The output is the document itself — deliver it directly. The doc body stays in normal prose because its readers are humans; skip everything around it.

Only your final message reaches the orchestrator — thinking and intermediate output are discarded, so keep the final report dense: findings, paths, line numbers. No preamble, no closing prose.

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. 6d ago First seen · 52 lines · 109 tokens per session scan A c524f6d1ce48

Subscribe to this mod's changes

hydra-scribe is an agent published in the GitHub repository AR6420/Hail_Hydra (48 stars, last pushed 25d ago), licensed MIT. It adds 109 tokens to every session and 439 once invoked, about $0.0005 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.

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