event-correctness

event-correctness is a skill for Claude Code, Codex from PlamenTSV/plamen. It costs 34 tokens per session (551 once invoked), scanned A, original, MIT.

An optional audit check for applications that emit more than 15 events. Events are records written for other systems or observers when something happens in the application.

In plain words
What is it for?
Listing every event emission and checking its parameters, indexes, timing, and coverage across conditional branches against the operation that changed the application’s state.
Why use it?
It catches event records that report the wrong value, entity, order, or branch result compared with the state change that actually occurred.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/plamentsv/plamen/event-correctness
Any agent
npx skills add PlamenTSV/plamen --skill event-correctness
Clone the repo
git clone --depth 1 https://github.com/PlamenTSV/plamen

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 event-correctness

README.md
[![agentmods](https://agentmods.dev/badge/skills/plamentsv/plamen/event-correctness.svg)](https://agentmods.dev/skills/plamentsv/plamen/event-correctness)
Your own site
<a href="https://agentmods.dev/skills/plamentsv/plamen/event-correctness"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/event-correctness.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 551 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 5.1 $0.00034 $0.00551
Opus 5 $0.00017 $0.00275
Sonnet 5 $0.00007 $0.00110
Haiku 4.5 $0.00003 $0.00055

Measured 6d ago against content hash fccc90e8b79d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

event-correctness 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.

agents/skills/evm/event-correctness/SKILL.md · 38 lines

How it starts

The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill: EVENT_CORRECTNESS

Trigger: >15 events detected in recon event_definitions.md (optional skill) Used By: breadth agents (assigned to core state or dedicated agent) Purpose: Verify emitted event parameters match actual state changes

Methodology

Step 1: Inventory All Emit Statements

From {SCRATCHPAD}/emit_list.md, extract every emit statement with:

  • Event name, parameter values passed, source location
  • The state-changing operation(s) that precede the emit

Step 2: Parameter Semantic Check

For EACH emit statement, verify:

# Check Question
1 Value accuracy Does each parameter reflect the ACTUAL post-operation state? (not a stale pre-operation value, not an input parameter that was modified before use)
2 Index correctness If the event indexes an entity (ID, address, index), is the index the CORRECT entity? (not off-by-one, not a different entity's ID, not a loop variable after increment)
3 Ordering Is the emit placed AFTER all state changes it describes? (not before a conditional that could change the values)
4 Conditional coverage If the function has branching logic, does EVERY branch that modifies state emit the appropriate event? (no silent state changes)
5 Parameter count Do the emitted parameters match the event definition? (Solidity allows emitting fewer params - missing params default to zero)
6 Semantic correctness Does each emitted variable match the SEMANTIC INTENT of the parameter name? If the event parameter is named tokensReceived, is the emitted value the actual tokens received (output), or is it the input amount (e.g., DAI spent)? Compare the parameter name against the variable being emitted - a mismatch between name semantics and actual value is a finding even if types match.

Step 3: Off-Chain Impact Assessment

For events consumed by off-chain systems (indexers, frontends, monitoring):

  • If event parameters are wrong → off-chain state diverges from on-chain state
  • Severity: typically LOW-MEDIUM unless financial decisions depend on indexed events

Read the full file on GitHub · 38 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. 6d ago First seen · 38 lines · 34 tokens per session scan A fccc90e8b79d

Subscribe to this mod's changes

event-correctness is a skill published in the GitHub repository PlamenTSV/plamen (281 stars, last pushed 1mo ago), licensed MIT. It adds 34 tokens to every session and 551 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 2026-08-30.

Related

Other skills, from other repositories

prowler-ui

Prowler UI-specific patterns. For generic patterns, see: typescript, react-19, nextjs-16, tailwind-4. Trigger: When working inside ui/ on Prowler-specific conventions (shadcn, folder placement, actions/adapters, shared types/hooks/lib).

prowler-cloud/prowler · 64 tokens

prowler-pr

Creates Pull Requests for Prowler following the project template and conventions. Trigger: When working on pull request requirements or creation (PR template sections, PR title Conventional Commits check, changelog gate/no-changelog label), or when inspecting PR-related GitHub workflows like conventional-commit.yml…

prowler-cloud/prowler · 84 tokens

prowler-commit

Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.

prowler-cloud/prowler · 33 tokens

tailwind-4

Tailwind CSS 4 patterns and best practices. Trigger: When styling with Tailwind (className, variants, cn()), especially when dynamic styling or CSS variables are involved (no var() in className).

prowler-cloud/prowler · 47 tokens

prowler

Main entry point for Prowler development - quick reference for all components. Trigger: General Prowler development questions, project overview, component navigation (NOT PR CI gates or GitHub Actions workflows).

prowler-cloud/prowler · 43 tokens

prowler-tour

Keeps product-tour definitions aligned with the UI features they describe. Trigger: When modifying UI components that have associated tours, editing tour definition files, or renaming data-tour-id attributes.

prowler-cloud/prowler · 41 tokens