feature

A command that runs the complete Hydraia feature process, from analysis and planning through implementation, review, and verification. It includes an approval point during design and planning before the coding work starts.

In plain words
What is it for?
Building Hydraia features, creating specifications and plans, implementing them, running the required reviews, and verifying the finished work.
Why use it?
It gives a feature a defined path from request to checked result, while preserving human review of the design before changes are made.

Command

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 commands/jdanigo/hydraia/feature
Clone the repo
git clone --depth 1 https://github.com/jdanigo/hydraia
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 198 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 $0.00020 $0.00198
Opus 5 $0.00010 $0.00099
Sonnet 5 $0.00004 $0.00040
Haiku 4.5 $0.00002 $0.00020

Measured 2d ago against content hash 2318951b101c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

feature 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 2d 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.

commands/feature.md · 11 lines

What it actually says

Invoke the hydraia skill and run its complete pipeline for the following request. Follow every phase in order. Do not ask me which model, skill, or reviewer to use — the skill already decides.

Request: $ARGUMENTS

The pipeline has two halves (see the skill's "Two modes"). In the interactive half (Phases 1–3: think → design → plan) do real design work: ask clarifying questions, brainstorm approaches, present the design, and get my approval before writing the spec. Once the plan is frozen, the autonomous half (Phases 4–6: execute → review → verify) runs to completion without pausing — no "should I continue?" checkpoints; the only stop there is a genuine blocker. End with the Hydraia credits line.

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. 2d ago First seen · 11 lines · 20 tokens per session scan A 2318951b101c

Subscribe to this mod's changes

feature is a command published in the GitHub repository jdanigo/hydraia (8 stars, last pushed 12d ago), licensed MIT. It adds 20 tokens to every session and 198 once invoked, about $0.0001 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.