aidd-core

aidd-core is a skill for Claude Code, Codex from rchase999/aidd. It costs 58 tokens per session (1,678 once invoked), scanned A, original, MIT.

A development framework with three phases: shape the idea, research what is needed, and build the result. Between research and building, a human reviews the recorded decisions in a browser and chooses how to proceed.

In plain words
What is it for?
Use it to start or resume an AI-driven development run, survey an existing codebase, record decisions, and guide work through the human review gate.
Why use it?
It makes important technical and product decisions visible before implementation begins. This is especially useful when an existing project already has constraints that should not be rediscovered or changed casually.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the aidd plugin — 5 skills, 6 commands, 4 agents, 1 hook 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 skills/rchase999/aidd/aidd-core
Any agent
npx skills add rchase999/aidd --skill aidd-core
Clone the repo
git clone --depth 1 https://github.com/rchase999/aidd

Made for: Claude Code, Codex.

Or install aidd, the plugin that ships this one along with the rest of its 5 skills, 6 commands, 4 agents, 1 hook.

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 aidd-core

README.md
[![agentmods](https://agentmods.dev/badge/skills/rchase999/aidd/aidd-core.svg)](https://agentmods.dev/skills/rchase999/aidd/aidd-core)
Your own site
<a href="https://agentmods.dev/skills/rchase999/aidd/aidd-core"><img src="https://agentmods.dev/badge/skills/rchase999/aidd/aidd-core.svg" alt="Measured on agentmods" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,678 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 $0.00058 $0.01678
Opus 5 $0.00029 $0.00839
Sonnet 5 $0.00012 $0.00336
Haiku 4.5 $0.00006 $0.00168

Measured 4d ago against content hash ea46cd15eff8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

aidd-core 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.

aidd/skills/aidd-core/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AIDD — the framework

Three phases. One gate. The gate is the point.

  IDEATE            RESEARCH                 [ GATE ]              EXECUTE
  sharpen     ->    sweep everything    ->   human chooses    ->   build
  the idea          findable                 in the browser        under contract

Most AI development fails in the same place: the model quietly makes a hundred technical decisions the human never saw, and by the time anyone notices, the decisions are load-bearing. AIDD moves those decisions into one visible moment where a human can actually act on them — and then holds the build to what was decided.

Two modes

init auto-detects which one you are in and records it in state.json. aidd.mjs scan reports the evidence.

Greenfield — an empty or near-empty directory. Every decision is open.

Brownfield — a project already exists here. Most foundation decisions are closed, and re-asking them is worse than useless: it teaches the user to click through the gate without reading, which destroys the only thing the gate is for.

In brownfield mode:

  • aidd-surveyor maps the codebase first, into .aidd/00-context/codebase.md.
  • Closed decisions become "locked": true segments — rendered read-only on the gate, excluded from the submit requirement, delivered to the contract as LOCKED. They still get a note box, because "fine for now, but I want this gone next quarter" is real information.
  • The stack, its constraints, and the must-not-break list go in the top-level context block of options.json. Every stack entry needs evidence — the file that proves it — or validation fails.
  • Only genuinely open decisions get stances.

Locking is a judgement with teeth. Lock something that was actually open and you have made the user's decision for them behind their back. When it is borderline, leave it open with a strong recommendation and state what switching would cost.

Phase 1 — Ideate

Make the idea clear, not bigger. No technology, no feature lists, no roadmap.

Read the full file on GitHub · 124 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. 4d ago First seen · 124 lines · 58 tokens per session scan A ea46cd15eff8

Subscribe to this mod's changes

aidd-core is a skill published in the GitHub repository rchase999/aidd (2 stars, last pushed 26d ago), licensed MIT. It adds 58 tokens to every session and 1,678 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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