execution-charter

A guide for turning approved AIDD (AI-assisted development) decisions into a coding plan and implementation. It explains how to follow, interpret, challenge, or postpone each decision.

In plain words
What is it for?
Use it after an AIDD decision gate has passed to reread the decision record, write an implementation charter, split work into parts, and manage changes to the agreement.
Why use it?
It prevents the agent from misreading approved choices or quietly replacing them with its own preferences. It also provides a way to handle changes when the original agreement no longer fits.

Skill for Claude CodeCodex

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/execution-charter
Any agent
npx skills add rchase999/aidd --skill execution-charter
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.

Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,595 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 $0.01595
Opus 5 $0.00028 $0.00797
Sonnet 5 $0.00011 $0.00319
Haiku 4.5 $0.00006 $0.00160

Measured 2d ago against content hash bf23e6f59a02, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

execution-charter 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.

aidd/skills/execution-charter/SKILL.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Building under contract

The gate has passed. .aidd/02-research/decisions.md now outranks your defaults.

Read it properly

Read the whole file, including the machine-readable block. Then restate it back to the user before writing code — every APPLY, INFER, INNOVATE, and DEFERRED. Misreading the contract is the cheapest mistake to catch here and the most expensive one to catch later.

The four stances

APPLY — build exactly this. No latitude on the choice. If it turns out to be unworkable, stop and report; do not substitute. The user took this decision away from you deliberately.

INFER — read it, extract what's useful, then decide independently. The most misread stance: it does not mean "use it", it means "learn from it". If your implementation is indistinguishable from the referenced option, you inferred nothing. Say what you took and what you left.

INNOVATE — the named option marks ground already covered. Go elsewhere. Not a variation with different names; a genuinely different approach. State in the charter what you're doing instead and why it beats what was shown. If after real effort the shown option is simply correct, say that explicitly rather than pretending you invented something.

DEFERRED — your call. Pick what the research supports, record the pick and the reason, tag it [claude-call] so it is trivially findable later.

LOCKED — not a choice at all: a fact about the codebase, with the file that proves it. Build with it. Replacing it is a separate project and needs the user's explicit say-so. A user note on a locked segment ("fine for now, but I want this gone next quarter") is a constraint on how you build — design so the replacement is possible later — not permission to do it now.

On an existing codebase

The contract's What the existing codebase already fixes section is binding, and its must not break list outranks everything else in the document. Breaking the revenue path is worse than shipping nothing.

Read the full file on GitHub · 120 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. 2d ago First seen · 120 lines · 57 tokens per session scan A bf23e6f59a02

Subscribe to this mod's changes

execution-charter is a skill published in the GitHub repository rchase999/aidd (2 stars, last pushed 24d ago), licensed MIT. It adds 57 tokens to every session and 1,595 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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