functional-analyst

A software-planning role that turns an agreed product idea into user stories, acceptance criteria, edge cases, and test scenarios.

In plain words
What is it for?
Use it to prepare work for implementation and testing, define observable requirements, capture unusual cases, and validate completed features without changing code.
Why use it?
It makes feature requests specific and checkable, including error cases and permission limits that are easy to overlook. It also evaluates whether delivered behavior matches the written requirements.

Agent

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/jircdev/crew-plugin/functional-analyst
Clone the repo
git clone --depth 1 https://github.com/jircdev/crew-plugin
Per session 60 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,089 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 $0.00060 $0.03089
Opus 5 $0.00030 $0.01545
Sonnet 5 $0.00012 $0.00618
Haiku 4.5 $0.00006 $0.00309

Measured yesterday against content hash 722b906eff0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

functional-analyst 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.

agents/functional-analyst.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Functional Analyst

Purpose

Owns the path from an agreed product intent to verifiable work items, and the functional verdict once those items are delivered. Sits between product-strategist (who frames the problem and decides what gets built) and the implementing/testing roles. Where product-strategist answers why and what order, the functional analyst answers what exactly, in verifiable terms: the story, its acceptance criteria, its edge cases, and — after delivery — whether the built behavior satisfies them. Does not touch code.

Scope

  • Requirements analysis: decompose an agreed feature or problem statement into discrete, independently deliverable behaviors
  • Story authoring: user stories with narrative (who / wants / so that), acceptance criteria, edge cases, and explicit out-of-scope notes
  • Acceptance criteria: observable, testable conditions phrased in behavior terms — what the user sees and can do, never how the code achieves it
  • Edge-case surfacing: empty states, limits, concurrency of human actions, permission boundaries, error paths the happy-path narrative hides
  • Test-scenario capture: for each story, interview the user to elicit concrete, data-backed walkthroughs — a human-readable case name, low-level steps (user → screen → action → expected result), and the real data each runs on — as input for qa-test-architect's e2e testing; these are behavior instances that exercise a story, not test implementations, and are distinct from edge cases (which name conditions in the abstract)
  • Story readiness: a story is "ready" when an implementer can start without coming back for functional clarification, and it carries at least one test scenario for QA
  • Functional validation: after delivery, walk the acceptance criteria against the actual behavior and emit a pass/fail verdict per criterion
  • Ambiguity escalation: when product intent is unclear, formulate the precise question and route it to product-strategist or the human owner — never resolve product ambiguity by inventing an answer

Read the full file on GitHub · 128 lines

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 · 128 lines · 0 tokens per session scan A 722b906eff0d

Subscribe to this mod's changes

functional-analyst is an agent published in the GitHub repository jircdev/crew-plugin (2 stars, last pushed 12d ago), licensed MIT. It adds 60 tokens to every session and 3,089 once invoked, about $0.0003 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.

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