success-metrics-defined

success-metrics-defined is an agent for Claude Code from infraspecdev/tesseract. It costs 59 tokens per session (446 once invoked), scanned A, original, MIT.

A reviewer that checks whether a plan says how success will be measured after the work ships. It looks for targets, thresholds, time limits, or observable changes.

In plain words
What is it for?
Use it to grade success measures in plans, research findings, proposals, and other product documents.
Why use it?
It prevents teams from declaring work successful based only on vague goals such as “improve” or “make users happier.”

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the shield plugin — 36 skills, 17 commands, 22 agents shipped together

Good fit Use it to grade success measures in plans, research findings, proposals, and other product documents.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/infraspecdev/tesseract/success-metrics-defined
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/infraspecdev/tesseract

Made for: Claude Code.

Or install shield, the plugin that ships this one along with the rest of its 36 skills, 17 commands, 22 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 success-metrics-defined

README.md
[![agentmods](https://agentmods.dev/badge/agents/infraspecdev/tesseract/success-metrics-defined/github.svg)](https://agentmods.dev/agents/infraspecdev/tesseract/success-metrics-defined)
Your own site
<a href="https://agentmods.dev/agents/infraspecdev/tesseract/success-metrics-defined"><img src="https://agentmods.dev/badge/agents/infraspecdev/tesseract/success-metrics-defined/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 success-metrics-defined

Your own site · 80×15
<a href="https://agentmods.dev/agents/infraspecdev/tesseract/success-metrics-defined"><img src="https://agentmods.dev/badge/agents/infraspecdev/tesseract/success-metrics-defined.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 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 $0.00059 $0.00446
Opus 5.5 $0.00024 $0.00178
Sonnet 5.5 $0.00012 $0.00089
Haiku 4.5 $0.00006 $0.00045

Measured 1mo ago against content hash 252e1737da2a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

success-metrics-defined 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 1mo 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.

shield/agents/success-metrics-defined.md · 46 lines

What it actually says

Success Metrics Defined (PM8)

Description

Grade ONE PM dimension: does the doc state HOW we will know the work succeeded after it ships? This is a plan-level / research-level check — distinct from the PRD-Review dim 3 structural check on a PRD's metrics section. Return a single-check JSON block — no prose.

Inputs

  • doc_path — absolute path to the plan, research findings, RFC, or proposal under review

Check

ID Eval point Severity Pass criterion
PM8 Success metrics Important The doc defines at least one measurable outcome (numeric threshold, target percentage, time-bound goal, observable behavioral change) that determines "this worked". Vague "improve X" / "users will be happier" / "support tickets should drop" without a measurement fails.

Grade A (fully met) / B (minor gap) / C (partial) / D (barely) / F (absent).

Output shape (JSON only)

{
  "id": "PM8",
  "name": "Success metrics",
  "persona": "product-manager",
  "grade": "A|B|C|D|F",
  "severity": "Important",
  "evidence_quote": "<verbatim line from the doc, or empty string if absent>",
  "gap": "<one sentence, or null if grade A>",
  "suggestion": "<one sentence, or null if grade A>"
}

evidence_quote MUST be a verbatim substring of the doc; do not paraphrase.

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. 1mo ago First seen · 46 lines · 59 tokens per session scan A 252e1737da2a

Subscribe to this mod's changes

success-metrics-defined is an agent published in the GitHub repository infraspecdev/tesseract (5 stars, last pushed 3mo ago), licensed MIT. It adds 59 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 2026-09-03.

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