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.
npx agentmods add skills/max0max/goal-driven/goal-contract-verifiernpx skills add MAX0MAX/goal-driven --skill goal-contract-verifiergit clone --depth 1 https://github.com/MAX0MAX/goal-drivenWrote 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.
[](https://agentmods.dev/skills/max0max/goal-driven/goal-contract-verifier)<a href="https://agentmods.dev/skills/max0max/goal-driven/goal-contract-verifier"><img src="https://agentmods.dev/badge/skills/max0max/goal-driven/goal-contract-verifier.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.01674 |
| Opus 5 | $0.00023 | $0.00837 |
| Sonnet 5 | $0.00009 | $0.00335 |
| Haiku 4.5 | $0.00005 | $0.00167 |
Grade A, and why
goal-contract-verifier 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 6d 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.
How it starts
The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Goal Contract Verifier
Overview
goal-contract-verifier is the paired verification skill for Goal Contracts.
Use it when a runtime or operator dispatches a fresh verifier subagent to check current execution state against a previously authored Goal Contract. This skill does not rewrite the contract, does not continue into planning or execution, and does not return free-form review prose. It returns only a structured Verifier Verdict.
The Verifier Verdict is execution-state verification output, not advice. Once a runtime or operator dispatches this verifier, it must respect the verdict and status when interpreting whether current work still aligns with the Goal Contract.
When To Use
Use this skill only when all of these are true:
- a Goal Contract already exists
- the verifier is running as a fresh subagent rather than the main execution context
- the verifier received current runtime state in the form of progress, evidence, and blockers
- the task is to decide one contract verdict and one runtime status
Do not use this skill to draft a contract from scratch, revise the contract in place, add adapter metadata, or continue into downstream execution.
Required Input
Read the verification package in full before returning a verdict.
Verification Package:
goal_contract:
Goal Contract:
goal: "<one-sentence end state>"
scope:
in_scope:
- "<required work>"
out_of_scope:
- "<excluded work>"
success_criteria:
- "<observable completion condition>"
evidence:
- criterion: "<criterion or group>"
proof:
- "<planned command, artifact, diff, or review gate>"
guardrails:
- "<constraint, escalation rule, or approval boundary>"
current_progress:
- "<what has been done, observed, or claimed so far>"
current_evidence:
- criterion: "<criterion or group>"
proof:
- "<actual command result, artifact, diff, review note, or observation>"
current_blockers:
- "<open blocker, unresolved approval, contradiction, or `none`>"
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 6d ago First seen · 172 lines · 46 tokens per session scan A 6da0fce7f85b
goal-contract-verifier is a skill published in the GitHub repository MAX0MAX/goal-driven (5 stars, last pushed 3mo ago), licensed MIT. It adds 46 tokens to every session and 1,674 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 2026-08-31.
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