robert-spec

robert-spec is an agent for Claude Code from robertsfeir/atelier-pipeline. It costs 36 tokens per session (581 once invoked), scanned A, original, Apache-2.0.

A product-specification agent that discovers features and writes their requirements to the project's product documentation. It defines what users should see and do, along with testable acceptance criteria.

In plain words
What is it for?
Use it to create feature specs, problem statements, acceptance criteria, out-of-scope notes, and lists of unresolved questions.
Why use it?
It turns a loosely described feature into a written scope that developers can implement and reviewers can check.

Agent for Claude Code

Written for Claude Code: hooks in frontmatter. Also seen: model in frontmatter; reads .claude/ paths; mentions CLAUDE.md.

Part of the atelier-pipeline plugin — 4 skills, 7 commands, 14 agents, 8 hooks shipped together

Good fit Use it to create feature specs, problem statements, acceptance criteria, out-of-scope notes, and lists of unresolved questions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/robertsfeir/atelier-pipeline/robert-spec
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/robertsfeir/atelier-pipeline

Made for: Claude Code.

Or install atelier-pipeline, the plugin that ships this one along with the rest of its 4 skills, 7 commands, 14 agents, 8 hooks.

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 robert-spec

README.md
[![agentmods](https://agentmods.dev/badge/agents/robertsfeir/atelier-pipeline/robert-spec.svg)](https://agentmods.dev/agents/robertsfeir/atelier-pipeline/robert-spec)
Your own site
<a href="https://agentmods.dev/agents/robertsfeir/atelier-pipeline/robert-spec"><img src="https://agentmods.dev/badge/agents/robertsfeir/atelier-pipeline/robert-spec.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 581 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 $0.00036 $0.00581
Opus 5 $0.00018 $0.00291
Sonnet 5 $0.00007 $0.00116
Haiku 4.5 $0.00004 $0.00058

Measured 8d ago against content hash c99cffad57a1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

robert-spec 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.

.claude/agents/robert-spec.md · 60 lines

What it actually says

Your job is feature discovery, spec writing, and defining acceptance criteria. You write specs to docs/product/. Writes to docs/product/ only. You are the producer counterpart to the Robert reviewer persona.

Derive scope from Eva's <task> tag — it states what the spec must cover.

  1. Read existing specs. Read all files in docs/product/ for context, consistency, and format.
  2. Extract requirements. From Eva's <task>, identify: feature name, problem being solved, expected user-facing behavior, and any explicit constraints or out-of-scope statements.
  3. Write the spec to docs/product/{feature}-spec.md using this structure:
    • Summary: One paragraph — what the feature does and its value.
    • Problem Statement: The user problem this solves and why it matters.
    • Acceptance Criteria: Numbered, testable statements. Each criterion describes an observable outcome. No vague language ("works correctly" is not a criterion).
    • Out of Scope: Explicit list of related things this spec does NOT cover.
    • Open Questions: Unresolved decisions that need answers before or during implementation.
  4. DoD. Verify: every acceptance criterion is testable, out-of-scope section is present, file written to docs/product/.

Return exactly one line to Eva: robert-spec: Spec written to docs/product/{feature}-spec.md. [N] acceptance criteria.

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 · 60 lines · 36 tokens per session scan A c99cffad57a1

Subscribe to this mod's changes

robert-spec is an agent published in the GitHub repository robertsfeir/atelier-pipeline (25 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 36 tokens to every session and 581 once invoked, about $0.0002 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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