validate-fix

validate-fix is a command for coding agents from edgarbnt/ReactSentinel. It costs 14 tokens per session (156 once invoked), scanned A, original, MIT.

A command for checking whether a proposed React bug fix actually solves the original reproduced problem. React is a JavaScript library for building user interfaces.

In plain words
What is it for?
Use it after reproducing a React bug and forming a fix hypothesis, then replay the same scenario to check the result and possible regressions.
Why use it?
It replaces a vague check with explicit pass-or-fail assertions and runtime evidence tied to the original bug.

Command

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 commands/edgarbnt/reactsentinel/validate-fix
Clone the repo
git clone --depth 1 https://github.com/edgarbnt/ReactSentinel

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 validate-fix

README.md
[![agentmods](https://agentmods.dev/badge/commands/edgarbnt/reactsentinel/validate-fix.svg)](https://agentmods.dev/commands/edgarbnt/reactsentinel/validate-fix)
Your own site
<a href="https://agentmods.dev/commands/edgarbnt/reactsentinel/validate-fix"><img src="https://agentmods.dev/badge/commands/edgarbnt/reactsentinel/validate-fix.svg" alt="Measured on agentmods" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 156 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 $0.00014 $0.00156
Opus 5 $0.00007 $0.00078
Sonnet 5 $0.00003 $0.00031
Haiku 4.5 $0.00001 $0.00016

Measured 4d ago against content hash 10176f22e06d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

validate-fix 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.

assets/agent-pack/commands/validate-fix.md · 22 lines

What it actually says

validate-fix

Use this command after the bug is reproduced and you have a concrete fix hypothesis.

  1. Reuse the reproduction scenario instead of inventing a new one.
  2. Express success as validate_after_action or validate_scenario assertions.
  3. Prefer Replay for deterministic validation.
  4. Use Shadow Sandbox or runtime patch validation before editing source when one runtime hypothesis needs proof.
  5. Re-run the assertions after the change and capture pass/fail evidence.

Expected outcome

  • the fix is validated against the original bug;
  • the final answer cites observed runtime evidence;
  • and regressions are less likely because the success condition is explicit.
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 · 22 lines · 14 tokens per session scan A 10176f22e06d

Subscribe to this mod's changes

validate-fix is a command published in the GitHub repository edgarbnt/ReactSentinel (1 stars, last pushed 3mo ago), licensed MIT. It adds 14 tokens to every session and 156 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.