delivery-proof

delivery-proof is a skill for Claude Code, Codex from PerryLink/dsh-doublecheck. It costs 50 tokens per session (661 once invoked), scanned A, original, Apache-2.0.

A final-check procedure for software work that turns the specification, tests, code changes, and review results into a delivery report. It is intended to confirm that completed work is supported by evidence.

In plain words
What is it for?
Use it after implementation and testing to create a double-check report and read whether the delivery was proven or challenged.
Why use it?
It reduces the risk of declaring a task finished without checking the requirements, tests, and review findings.

Skill for Claude CodeCodex

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/perrylink/dsh-doublecheck/delivery-proof
Any agent
npx skills add PerryLink/dsh-doublecheck --skill delivery-proof
Clone the repo
git clone --depth 1 https://github.com/PerryLink/dsh-doublecheck

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 delivery-proof

README.md
[![agentmods](https://agentmods.dev/badge/skills/perrylink/dsh-doublecheck/delivery-proof.svg)](https://agentmods.dev/skills/perrylink/dsh-doublecheck/delivery-proof)
Your own site
<a href="https://agentmods.dev/skills/perrylink/dsh-doublecheck/delivery-proof"><img src="https://agentmods.dev/badge/skills/perrylink/dsh-doublecheck/delivery-proof.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 661 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 $0.00050 $0.00661
Opus 5 $0.00025 $0.00331
Sonnet 5 $0.00010 $0.00132
Haiku 4.5 $0.00005 $0.00066

Measured 4d ago against content hash 6ae1666dc2e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

delivery-proof 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 4d 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.

skills/delivery-proof/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

delivery-proof: prove, don't claim

You are an engineering discipline skill from dsh-doublecheck. Your job is to turn the session's discipline evidence into a delivery record before completion is claimed. Double-check before you ship: grill the requirements, test the implementation, prove the delivery. This skill owns the last verb — prove.

When to apply this skill

Use this skill when the implementation is done, the latest test evidence is green, and the review objections (if any) are answered. The user may also ask for a proof, a delivery summary, or a "what did we actually do" record.

Producing the report

  1. Call the doublecheck_report tool. It folds the durable session log — the committed spec, the red/green test timeline, the implementation edits, and the adversary review record — into a delivery report with a derived verdict.
  2. For a delivery the user will rely on, pass verify: true so one adversarial checker per spec dimension audits the session evidence and folds its verdicts into the report. Expect this to take longer and cost more than a plain report.
  3. Read the verdict before you speak. proven means every verification dimension passed; challenged or objections means the delivery is not proven and must not be described as such; unverified means not every dimension returned a verdict.

Passing the delivery gate

Before claiming the delivery is ready to ship, run the quality gate:

  1. Run /gate run. It settles the four-phase checklist — requirements interrogation, test evidence, implementation consistency, and the review conclusion — and returns a markdown report with a binary decision: deliverable or rework required.
  2. On a rework verdict, fix the red items and re-run /gate run; the report suggests re-opening the work in plan mode to re-check. Paste the final report into the PR description when the decision is deliverable.

Reading the verdict

  • grill / draft / red — the discipline loop is not complete. State what is missing instead of claiming completion.
  • green — evidence exists but the delivery is unreviewed.
  • verified / proven — the delivery satisfies its spec as far as the session evidence shows.
  • objections / challenged / unverified — name the objections or missing checks when reporting status, and fix them before claiming completion.

Read the full file on GitHub · 65 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. 4d ago First seen · 65 lines · 50 tokens per session scan A 6ae1666dc2e2

Subscribe to this mod's changes

delivery-proof is a skill published in the GitHub repository PerryLink/dsh-doublecheck (14 stars, last pushed today), licensed Apache-2.0. It adds 50 tokens to every session and 661 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 2026-08-30.

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