spec-critic

spec-critic is a skill for Claude Code, Codex from vmobifystudio/app-dev-team. It costs 95 tokens per session (1,461 once invoked), scanned A, original, MIT.

Use after the impl specs and the board exist but before any developer is spawned, to find every question a developer would otherwise be forced to guess at — error types, empty/failure states, cancel paths, source of truth, units, offline, atomicity. Produces question rows in the team ledger for tech-lead to answer in…

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside the plugin that ships it — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed.

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 skills/vmobifystudio/app-dev-team/spec-critic
Any agent
npx skills add vmobifystudio/app-dev-team --skill spec-critic
Clone the repo
git clone --depth 1 https://github.com/vmobifystudio/app-dev-team

Made for: Claude Code, Codex.

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 spec-critic

README.md
[![agentmods](https://agentmods.dev/badge/skills/vmobifystudio/app-dev-team/spec-critic.svg)](https://agentmods.dev/skills/vmobifystudio/app-dev-team/spec-critic)
Your own site
<a href="https://agentmods.dev/skills/vmobifystudio/app-dev-team/spec-critic"><img src="https://agentmods.dev/badge/skills/vmobifystudio/app-dev-team/spec-critic.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,461 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00095 $0.01461
Opus 5 $0.00048 $0.00731
Sonnet 5 $0.00019 $0.00292
Haiku 4.5 $0.00010 $0.00146

Measured today against content hash 79815f0801e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spec-critic 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.

skills/spec-critic/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec critic

tech-lead runs this. Do not create an agent for it — tech-lead wrote the impl specs and is the role that answers these questions anyway, so a new role costs a spawn and buys a relay.

Run it once per sprint, after docs/22-impl-spec-*.md and docs/31-board.md exist and before /app-build spawns anyone. Not once per ticket.

Why it exists

Measured across three dry runs and ten agent-runs, the live team channel was used zero times — including a run where the agent hit a planted ambiguity, decided it should raise it, and then reported that it had, when it had not. An agent that can proceed will proceed. The full story is in skills/team-protocol/SKILL.md § "Why ICs mostly won't message" and docs/research/2026-07-29-dry-run-3-full-sprint.md.

"Declare, don't dispatch" catches the guess after it was made. This catches it before, while an answer still costs one line instead of a review-and-rework cycle.

What you hunt

For each ticket on the board, read its acceptance criteria and the spec section it points at, then ask what a developer would have to invent. Ground every question in an acceptance criterion — a question no criterion depends on is noise.

  • Error type at a boundary. Which type crosses repo → view model? What does the spec's named type map to when the platform throws its own?
  • Empty, loading, failure. Each is a state with UI. Which of the three does the spec skip?
  • Source of truth. Two components hold the same value — which one wins when they disagree?
  • Cancel. The happy path is usually specified and the cancel branch usually is not. This project shipped a photo picker whose success branch was right and whose cancel branch wiped the existing photo (skills/defect-hunting/SKILL.md §1).
  • Idempotency and atomicity. Run it twice — same result? Fail halfway — is the write all or nothing?
  • Validation ownership. Which layer rejects bad input: UI, view model, or repository? Named once or in all three?
  • Exact copy. A user-visible string the spec describes but does not quote.
  • Numbers. Units, and what happens exactly at the boundary value, not near it.
  • Offline. Queue, fail, or read stale?

Read the full file on GitHub · 103 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. today First seen · 103 lines · 95 tokens per session scan A 79815f0801e8

Subscribe to this mod's changes

spec-critic is a skill published in the GitHub repository vmobifystudio/app-dev-team (4 stars, last pushed 24d ago), licensed MIT. It adds 95 tokens to every session and 1,461 once invoked, about $0.0005 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 2026-09-03.

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