bobby-define-features

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

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/ccevans/bobbycode/bobby-define-features
Clone the repo
git clone --depth 1 https://github.com/ccevans/bobbycode

Made for: Claude Code.

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 441 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 $0.00026 $0.00441
Opus 5 $0.00013 $0.00220
Sonnet 5 $0.00005 $0.00088
Haiku 4.5 $0.00003 $0.00044

Measured yesterday against content hash b3ae2552c85e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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 · 31 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. yesterday 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 8d ago), licensed MIT. It adds 26 tokens to every session and 441 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.