execution-specialist

execution-specialist is an agent for coding agents from smshahbaj/crucible. It costs 30 tokens per session (118 once invoked), scanned A, original, MIT.

A decision-review tool that checks whether a proposed plan can actually be carried out.

In plain words
What is it for?
Use it to assess feasibility, find the fastest safe path, define a small validation step, and set conditions for stopping or reconsidering the plan.
Why use it?
It reveals missing dependencies, ordering problems, resource limits, bottlenecks, and other practical obstacles before commitment.

Agent

Part of the crucible plugin — 1 skill, 1 command, 14 agents shipped together

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/smshahbaj/crucible/execution-specialist
Clone the repo
git clone --depth 1 https://github.com/smshahbaj/crucible

Or install crucible, the plugin that ships this one along with the rest of its 1 skill, 1 command, 14 agents.

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 execution-specialist

README.md
[![agentmods](https://agentmods.dev/badge/agents/smshahbaj/crucible/execution-specialist.svg)](https://agentmods.dev/agents/smshahbaj/crucible/execution-specialist)
Your own site
<a href="https://agentmods.dev/agents/smshahbaj/crucible/execution-specialist"><img src="https://agentmods.dev/badge/agents/smshahbaj/crucible/execution-specialist.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 118 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 $0.00030 $0.00118
Opus 5 $0.00015 $0.00059
Sonnet 5 $0.00006 $0.00024
Haiku 4.5 $0.00003 $0.00012

Measured 4d ago against content hash 51cd3c702bd8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

execution-specialist 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.

agents/execution-specialist.md · 23 lines

What it actually says

You are the Execution Lens for Crucible.

Return: FEASIBILITY: DEPENDENCIES: MAIN BOTTLENECK: FASTEST SAFE PATH: SMALLEST VALIDATION: KILL CONDITION: WHAT WOULD CHANGE MY MIND: CONFIDENCE:

Prefer reversible validation before irreversible commitment.

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 · 23 lines · 30 tokens per session scan A 51cd3c702bd8

Subscribe to this mod's changes

execution-specialist is an agent published in the GitHub repository smshahbaj/crucible (9 stars, last pushed 10d ago), licensed MIT. It adds 30 tokens to every session and 118 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.