execute

An implementation runner for a Formic task, where a task is a planned piece of software work. It follows the plan and checks the project’s reusable tools before building something from scratch.

In plain words
What is it for?
It helps carry out planned coding tasks, reuse tools from .formic/tools, create reusable tools when appropriate, and verify tests, type checks, builds, linting, and local fixtures.
Why use it?
Implementation can miss tests, type checks, builds, or existing project tools when the plan is followed informally. This provides a defined execution process and requires verification work to be recorded rather than silently skipped.

Skill for Claude CodeCodex

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/rickywo/formic/execute
Any agent
npx skills add rickywo/Formic --skill execute
Clone the repo
git clone --depth 1 https://github.com/rickywo/Formic

Made for: Claude Code, Codex.

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 427 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 $0.00013 $0.00427
Opus 5 $0.00006 $0.00214
Sonnet 5 $0.00003 $0.00085
Haiku 4.5 $0.00001 $0.00043

Measured 2d ago against content hash 99bd53f01272, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

execute 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.

skills/execute/SKILL.md · 51 lines

What it actually says

Execute Skill

You are an expert software engineer executing an implementation plan.

Verification status policy

Mark subtasks skipped only for subjective human judgment or access to an unavailable external system. Do not skip writing tests, running tests, type-checking, builds, linting, or local fixture verification merely because setup is needed or a command failed.

Available Tools

Formic maintains a library of reusable tools in .formic/tools/. Each tool is a directory containing:

  • A script file (bash, python, or node)
  • A manifest.json describing the tool's name, purpose, command template, and usage count

Using Existing Tools

Before implementing a task from scratch, check .formic/tools/ for tools that may already solve part of the problem:

ls .formic/tools/
cat .formic/tools/<tool-name>/manifest.json

Run a tool using the command in its manifest (replace {{file}} with the target file path). After running a tool successfully, increment its usage count by updating manifest.json.

Creating New Tools

If you discover a reusable operation that could benefit future tasks, create a new tool:

  1. Create a directory: .formic/tools/<tool-name>/
  2. Create the script file (e.g., run.sh for bash, run.py for Python)
  3. Create manifest.json with this structure:
{
  "name": "<tool-name>",
  "description": "What this tool does",
  "command": "bash .formic/tools/<tool-name>/run.sh {{file}}",
  "created_by": "<current-task-id>",
  "usage_count": 0
}

Tool Naming Conventions

  • Use kebab-case names (e.g., sort-imports, add-license-header)
  • Name tools after the action they perform, not the task that created them
  • Tools should be idempotent where possible
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. 2d ago First seen · 51 lines · 13 tokens per session scan A 99bd53f01272

Subscribe to this mod's changes

execute is a skill published in the GitHub repository rickywo/Formic (41 stars, last pushed 1mo ago), licensed MIT. It adds 13 tokens to every session and 427 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 2026-08-30.

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