bobby-define-features

bobby-define-features is an agent for Claude Code from ccevans/bobbycode. It costs 26 tokens per session (450 once invoked), scanned A, original, MIT.

A product-definition agent that turns user journeys into a feature map and defines what belongs in the first version of a product.

In plain words
What is it for?
Use it to derive features, mark them by priority, record non-goals, lock the product-definition documents, and hand the result to planning.
Why use it?
It keeps features tied to real user steps and prevents unneeded work from entering the initial release.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model in frontmatter; reads .claude/ paths.

Good fit Use it to derive features, mark them by priority, record non-goals, lock the product-definition documents, and hand the result to planning.

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Install with agentmods
npx agentmods add agents/ccevans/bobbycode/bobby-define-features
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/ccevans/bobbycode

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 bobby-define-features

README.md
[![agentmods](https://agentmods.dev/badge/agents/ccevans/bobbycode/bobby-define-features/github.svg)](https://agentmods.dev/agents/ccevans/bobbycode/bobby-define-features)
Your own site
<a href="https://agentmods.dev/agents/ccevans/bobbycode/bobby-define-features"><img src="https://agentmods.dev/badge/agents/ccevans/bobbycode/bobby-define-features/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 bobby-define-features

Your own site · 80×15
<a href="https://agentmods.dev/agents/ccevans/bobbycode/bobby-define-features"><img src="https://agentmods.dev/badge/agents/ccevans/bobbycode/bobby-define-features.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 450 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 $0.00026 $0.00450
Opus 5.5 $0.00010 $0.00180
Sonnet 5.5 $0.00005 $0.00090
Haiku 4.5 $0.00003 $0.00045

Measured today against content hash a6a1f237a9a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bobby-define-features 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 today.

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/agents/bobby-define-features.md · 33 lines

What it actually says

You turn journeys into the feature map and draw the v1 line. Features are derived from journey steps, never brainstormed — then you lock all four artifacts and hand the epic to planning.

Instructions

Follow Step 4 of .claude/skills/bobby-define/SKILL.md in full, including the lock-and-handoff sequence.

The job, in order

  1. Read .bobby/product/journeys.md. Walk every step; derive the capabilities it needs. A feature serving no step goes back to the journey or out — not into the map.
  2. Build the map per the skill's skeleton: F<j>.<seq> IDs keyed to journeys, journey-step and persona columns, MoSCoW. v1 = the Must rows. Every Never row cites a brief Non-goal (F0.x for cross-cutting rows).
  3. ⛳ Gate (verbatim): "The Must column is the whole of v1. Strike one thing from it — or tell me why nothing can go."
  4. After the gate: set Locked/Status: approved on all four artifacts; git add .bobby/product && git commit -m "product: definition locked for {EPIC}"; comment (--by bobby-define-features) with the one-line summary.

Hard rules

  • The Binding rules block goes in the map verbatim — bobby-plan is bound by it.
  • Scope questions were settled at the gates; do not reopen them during lock.

Completing Work

The definition is locked and committed. Hand off to bobby-define-blueprint, which generates the page that lets the human see the whole plan before anyone builds it.

Project overrides

If .claude/agents/bobby-define-features.local.md exists, read it and follow it. It wins wherever it conflicts with anything above. This file is regenerated on upgrade; that one never is.

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. today Changed · +2 lines a6a1f237a9a3
  2. 1mo ago First seen · 31 lines · 26 tokens per session scan A b3ae2552c85e

Subscribe to this mod's changes

bobby-define-features is an agent published in the GitHub repository ccevans/bobbycode (6 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 450 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 2026-08-31.

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