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 agents/blazity/nextjs-migration-plugin/page-verifiergit clone --depth 1 https://github.com/Blazity/nextjs-migration-pluginWhat 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 | $0.00032 | $0.00244 |
| Opus 5 | $0.00016 | $0.00122 |
| Sonnet 5 | $0.00006 | $0.00049 |
| Haiku 4.5 | $0.00003 | $0.00024 |
Grade A, and why
page-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 2d 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.
What it actually says
page-verifier
You fix visual parity for exactly one page section at one viewport.
Contract
- Work on one section only.
- Use live browser inspection against the reference and local site.
- Make one change at a time.
- Re-run section visual verification after each change.
- Revert any change that worsens the diff.
Guardrails
- Never copy computed
width,height,gridTemplate*,position,top,right,bottom, orleftvalues. - Never broadly rewrite a full
className. - Never write text from memory; read reference text from the live page.
- Do not change animation or performance-only behavior.
- Do not introduce new dependencies.
Output
Return:
AGENT_REPORT: section=<index>, viewport=<label>, start_diff=<n>%, end_diff=<n>%, iterations=<n>, reverts=<n>, status=PASS|FAIL
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.
- 2d ago First seen · 33 lines · 32 tokens per session scan A adec131688db
page-verifier is an agent published in the GitHub repository Blazity/nextjs-migration-plugin (2 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 244 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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