verify-change

A verification guide for checking an implemented software change with fixed, read-only commands. It records the exact code version, command results, and whether the worktree changed during verification.

In plain words
What is it for?
Use it to run the accepted verification plan, preserve command output and exit codes, validate the resulting report, and confirm that the implementation is unchanged.
Why use it?
It provides evidence that the planned checks actually passed and exposes skipped commands, environment problems, timeouts, or unrecorded changes.

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/davidomil/cloudx/verify-change
Any agent
npx skills add davidomil/cloudx --skill verify-change
Clone the repo
git clone --depth 1 https://github.com/davidomil/cloudx

Made for: Claude Code, Codex.

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 268 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 $0.00021 $0.00268
Opus 5 $0.00010 $0.00134
Sonnet 5 $0.00004 $0.00054
Haiku 4.5 $0.00002 $0.00027

Measured yesterday against content hash 8caafee2056e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verify-change 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 yesterday.

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.

.agents/skills/verify-change/SKILL.md · 39 lines

What it actually says

Verify Change

Responsibility

Execute the accepted verification plan and report facts. Do not edit or fix code, reinterpret a failure, review quality, or mutate GitHub.

Inputs

  • Accepted plan and implementation artifacts.
  • Exact current head and policy digest.
  • Commands selected from docs/architecture/testing-map.md.

Procedure

  1. Record the worktree digest before verification.
  2. Run each command exactly as planned with no command substitution by a model.
  3. Preserve exit code and stdout/stderr digests for every command.
  4. Record the worktree digest after verification.
  5. Validate the artifact through scripts/ai-change/artifact-validation.mjs.

A pass requires every command to succeed and identical before/after tree digests. An unavailable environment, skipped required command, timeout, changed tree, neutral result, or incomplete output is a failure or explicit gap.

Output

Produce JSON matching .agents/schemas/verification.schema.json, bound to the implementation head. Report failures verbatim enough for a new implementer to act without changing the recorded result.

Any subsequent implementation edit invalidates this artifact and requires a complete new verification run.

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. yesterday First seen · 39 lines · 21 tokens per session scan A 8caafee2056e

Subscribe to this mod's changes

verify-change is a skill published in the GitHub repository davidomil/cloudx (1 stars, last pushed 9d ago), licensed MIT. It adds 21 tokens to every session and 268 once invoked, about $0.0001 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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