memory-contract

memory-contract is a skill for Claude Code, Codex from groupzer0/vs-code-agents. It costs 36 tokens per session (1,334 once invoked), scanned A, original, MIT.

A set of rules for saving and retrieving information from Flowbaby, a memory tool for coding agents. It treats past workspace decisions and discussions as part of the agent’s working context.

In plain words
What is it for?
Use it at the start of a session and whenever the agent is making an assumption, choosing between options, encountering an unfamiliar term, or repeating similar work.
Why use it?
It reduces repeated questions, forgotten decisions, and mistakes caused by working without earlier context. It tells the agent when to check memory and when to save useful information for later.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it at the start of a session and whenever the agent is making an assumption, choosing between options, encountering an unfamiliar term, or repeating similar work.

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Install with agentmods
npx agentmods add skills/groupzer0/vs-code-agents/memory-contract
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.

Any agent
npx skills add groupzer0/vs-code-agents --skill memory-contract
Clone the repo
git clone --depth 1 https://github.com/groupzer0/vs-code-agents

Made for: Claude Code, Codex.

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 memory-contract

README.md
[![agentmods](https://agentmods.dev/badge/skills/groupzer0/vs-code-agents/memory-contract/github.svg)](https://agentmods.dev/skills/groupzer0/vs-code-agents/memory-contract)
Your own site
<a href="https://agentmods.dev/skills/groupzer0/vs-code-agents/memory-contract"><img src="https://agentmods.dev/badge/skills/groupzer0/vs-code-agents/memory-contract/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for memory-contract

Your own site · 80×15
<a href="https://agentmods.dev/skills/groupzer0/vs-code-agents/memory-contract"><img src="https://agentmods.dev/badge/skills/groupzer0/vs-code-agents/memory-contract.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,334 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00036 $0.01334
Opus 5.5 $0.00014 $0.00534
Sonnet 5.5 $0.00007 $0.00267
Haiku 4.5 $0.00004 $0.00133

Measured 1mo ago against content hash 536469c6c3c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

memory-contract 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 1mo 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.

vs-code-agents/skills/memory-contract/SKILL.md · 148 lines

How it starts

The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Unified Memory Contract

Using Flowbaby tools (flowbabyStoreSummary and flowbabyRetrieveMemory) is mandatory.


Core Principle

Memory is not a formality—it is part of your reasoning. Treat retrieval like asking a colleague who has perfect recall of this workspace. Treat storage like leaving a note for your future self who has total amnesia.

The cost/benefit rule: Retrieval is cheap (sub-second, a few hundred tokens). Proceeding without context when it exists is expensive (wrong answers, repeated mistakes, user frustration). When in doubt, retrieve.


When to Retrieve

Retrieve at decision points, not just at turn start. In a typical multi-step task, expect 2–5 retrievals.

Retrieve when you:

  • Are about to make an assumption → check if it was already decided
  • Don't recognize a term, file, or pattern → check if it was discussed
  • Are choosing between options → check if one was tried or rejected
  • Feel uncertain ("I think...", "Probably...") → that's a retrieval signal
  • Are about to do work → check if similar work already exists
  • Hit a constraint or error you don't understand → check for prior context

If no results: Broaden to concept-level and retry once. If still empty, proceed and note the gap.


How to Query

Queries should be specific and hypothesis-driven, not vague or encyclopedic.

❌ Weak query ✅ Strong query
"What do I know about this project?" "Previous decisions about authentication strategy in this repo"
"Any relevant memory?" "Did we try Redis for caching? What happened?"
"User preferences" "User's stated preferences for error handling verbosity"
"Past work" "Implementation status of webhook retry logic"

Heuristic: State the question you're trying to answer, not the category of information you want.


When to Store

Store at value boundaries—when you've created something worth preserving. Ask: "Would I be frustrated to lose this context?"

Read the full file on GitHub · 148 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. 1mo ago First seen · 148 lines · 36 tokens per session scan A 536469c6c3c3

Subscribe to this mod's changes

memory-contract is a skill published in the GitHub repository groupzer0/vs-code-agents (292 stars, last pushed 9mo ago), licensed MIT. It adds 36 tokens to every session and 1,334 once invoked, about $0.0001 per session on Opus 5.5. 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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