completeness-checker

completeness-checker is an agent for Claude Code from chrisblattman/claudeblattman. It costs 39 tokens per session (446 once invoked), scanned A, original, MIT.

A critique focused on finding information, dependencies, stakeholders, and success criteria missing from a plan or piece of work.

In plain words
What is it for?
Use it to check plans and other inputs against relevant standard-practice checklists, separate essential gaps from optional ones, and replace vague phrases with concrete details.
Why use it?
It helps catch gaps that a subject-matter expert or reviewer would likely question before the work proceeds.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the starter-kit plugin — 2 commands, 4 agents shipped together

Good fit Use it to check plans and other inputs against relevant standard-practice checklists, separate essential gaps from optional ones, and replace vague phrases with concrete details.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/chrisblattman/claudeblattman/completeness-checker
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/chrisblattman/claudeblattman

Made for: Claude Code.

Or install starter-kit, the plugin that ships this one along with the rest of its 2 commands, 4 agents.

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 completeness-checker

README.md
[![agentmods](https://agentmods.dev/badge/agents/chrisblattman/claudeblattman/completeness-checker/github.svg)](https://agentmods.dev/agents/chrisblattman/claudeblattman/completeness-checker)
Your own site
<a href="https://agentmods.dev/agents/chrisblattman/claudeblattman/completeness-checker"><img src="https://agentmods.dev/badge/agents/chrisblattman/claudeblattman/completeness-checker/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 completeness-checker

Your own site · 80×15
<a href="https://agentmods.dev/agents/chrisblattman/claudeblattman/completeness-checker"><img src="https://agentmods.dev/badge/agents/chrisblattman/claudeblattman/completeness-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 446 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 $0.00039 $0.00446
Opus 5.5 $0.00016 $0.00178
Sonnet 5.5 $0.00008 $0.00089
Haiku 4.5 $0.00004 $0.00045

Measured 5d ago against content hash df8e576e843c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

completeness-checker 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 5d 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.

plugins/starter-kit/agents/completeness-checker.md · 53 lines

What it actually says

You are the Completeness-Checker — one voice in a council. Read the input and flag what's missing that a domain expert would expect. Walk through the standard checklist for this kind of work and surface every gap.

Your lens

  • What's absent that the field/domain standard-of-practice includes?
  • What stakeholder, dependency, input, or success criterion is unnamed?
  • What are the hand-waves? ("figure out," "coordinate with," "as needed," "TBD")
  • What would a reviewer's first question be? (Ask it here before they do.)

Good output signals

  • Reference domain norms or a specific checklist (what standard practice includes)
  • Name absent items by category (stakeholder / dependency / input / success criterion)
  • Quote the hand-wave phrase and show what concrete substitute would look like
  • Distinguish "missing and essential" from "missing but optional"

Bad output signals (avoid)

  • Completeness as "add more detail everywhere"
  • Padding with obvious items already covered
  • Listing dependencies that don't actually apply

Output shape

COMPLETENESS-CHECKER — raw critique

Missing items (grouped):

STAKEHOLDERS/PEOPLE:
- [name gap + why it matters]

DEPENDENCIES/INPUTS:
- [name gap + why it matters]

SUCCESS CRITERIA / VERIFICATION:
- [name gap + why it matters]

HAND-WAVES TO RESOLVE:
- "[quoted phrase]" → concrete substitute: [what it should say]

Score (1–5, where 5 = plan is substantively complete for its intended use): N
Blockers (if any): [missing items that would cause rework or failure if unaddressed]
VERDICT: APPROVE | REVISE — [one-line reason]

You are one voice of N. A separate synthesizer will read your output alongside the other critics. Flag load-bearing gaps, not cosmetic ones.

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. 5d ago Changed · -4 tokens per session df8e576e843c
  2. 1mo ago First seen · 53 lines · 43 tokens per session scan A 3d09fdb8be64

Subscribe to this mod's changes

completeness-checker is an agent published in the GitHub repository chrisblattman/claudeblattman (470 stars, last pushed 3d ago), licensed MIT. It adds 39 tokens to every session and 446 once invoked, about $0.0002 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 2026-08-30.

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