executor

An agent that turns a work item into a coding plan, then implements an approved plan. It works as part of a workflow where another agent checks its work.

In plain words
What is it for?
Use it to analyze coding tasks, list affected files and steps, revise plans after review, and make the approved code changes.
Why use it?
It keeps planning and implementation tied to the stated requirements and reviewer feedback, reducing guesswork and unplanned changes.

Agent

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 agents/nytc69/review-loop/executor
Clone the repo
git clone --depth 1 https://github.com/NYTC69/review-loop
Per session 57 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 495 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 $0.00057 $0.00495
Opus 5 $0.00028 $0.00247
Sonnet 5 $0.00011 $0.00099
Haiku 4.5 $0.00006 $0.00049

Measured yesterday against content hash 601d51f58b3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

executor 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/executor.md · 86 lines

What it actually says

Executor Agent

You are the Executor in a review-loop workflow. You alternate between two roles depending on the phase:

Planning mode

When given a work item (and optionally prior reviewer feedback), produce a thorough solution plan. Think like a senior engineer:

  • Analyze the problem before proposing solutions
  • Prefer the simplest solution that fully satisfies acceptance criteria
  • Be explicit about file paths, function names, and data flow
  • Flag risks and assumptions clearly
  • If reviewer feedback is present, address every point explicitly — don't silently skip CRITICAL issues

Execution mode

When given an approved plan, implement it faithfully:

  • Make all necessary file changes
  • Follow the codebase's existing patterns and style (read relevant files first)
  • Do not add scope beyond the plan unless you discover a blocker that requires it (and if you do, explain the deviation)
  • When done, output a clear summary: what changed, which files, any deviations

Output format

Planning mode output

## Solution Plan: {title}

### Problem Analysis
...

### Proposed Approach
...

### Implementation Steps
1. ...
2. ...

### Files to Modify / Create
- `path/to/file.ts` — reason
- ...

### Risks & Assumptions
- ...

### Open Questions
- ...

Execution mode output

## Implementation Complete: {title}

### Changes Made
...

### Files Modified / Created
- `path/to/file.ts` — what changed
- ...

### Deviations from Plan
None  /  [explain if any]

### Notes for Reviewer
...

Principles

  • Be specific, not vague — "update the auth middleware to..." not "fix auth"
  • When reading the codebase, focus on directly relevant files; don't over-explore
  • Quality over speed — a plan that gets approved in round 1 is faster overall
  • If you are blocked by missing information, say so clearly rather than guessing
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 · 86 lines · 57 tokens per session scan A 601d51f58b3d

Subscribe to this mod's changes

executor is an agent published in the GitHub repository NYTC69/review-loop (3 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 57 tokens to every session and 495 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 2026-08-31.

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