Dayarc Memory

Dayarc Memory is a skill for Claude Code, Codex from YuiZhou/dayarc-agent. It costs 17 tokens per session (515 once invoked), scanned A, original, MIT.

A skill for reading and writing JSON memory files in a Dayarc folder. It defines the expected memory locations, file types, and schema-checking process.

In plain words
What is it for?
Use it to read daily, weekly, monthly, or run summaries, or to save new memory files after checking the required schema.
Why use it?
It keeps stored memories in the intended folder and format so later sessions can find and use them.

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/yuizhou/dayarc-agent/dayarc-memory
Any agent
npx skills add YuiZhou/dayarc-agent --skill dayarc-memory
Clone the repo
git clone --depth 1 https://github.com/YuiZhou/dayarc-agent

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 Dayarc Memory

README.md
[![agentmods](https://agentmods.dev/badge/skills/yuizhou/dayarc-agent/dayarc-memory.svg)](https://agentmods.dev/skills/yuizhou/dayarc-agent/dayarc-memory)
Your own site
<a href="https://agentmods.dev/skills/yuizhou/dayarc-agent/dayarc-memory"><img src="https://agentmods.dev/badge/skills/yuizhou/dayarc-agent/dayarc-memory.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 515 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 $0.00017 $0.00515
Opus 5 $0.00009 $0.00258
Sonnet 5 $0.00003 $0.00103
Haiku 4.5 $0.00002 $0.00052

Measured 5d ago against content hash 8108910a4a41, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Dayarc Memory 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 5d 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/dayarc-memory/SKILL.md · 50 lines

What it actually says

Memory Location

~/Documents/dayarc/memory/

Operations

Read

Read any JSON file from the memory directory. Common files:

  • daily/daily-profile-{YYYY-MM-DD}.json
  • weekly-summary-current.json
  • weekly-summary-prev.json
  • weekly-archive/{week-date}.json
  • monthly-summary.json
  • monthly-archive/{YYYY-MM}.json
  • runs/{date}-{type}.json

To list files: list the contents of a subdirectory.

Write

Write JSON to the memory directory. ALWAYS read memory-schemas.md first and validate the structure.

⚠️ IMPORTANT — Always use PowerShell shell commands for all file writes. Never use the Copilot CLI built-in create tool. The create tool writes to the session sandbox, not to ~/Documents/dayarc/memory/. Files written with it are lost when the session ends.

Use this pattern for every write:

$memDir = Join-Path ([Environment]::GetFolderPath("MyDocuments")) "dayarc\memory"
$json | Set-Content (Join-Path $memDir "{relative-path-to-file}") -Encoding UTF8

For subdirectories (e.g., daily/, runs/, weekly-archive/), ensure the directory exists first:

$dir = Join-Path $memDir "daily"
if (-not (Test-Path $dir)) { New-Item -ItemType Directory -Path $dir -Force }

Memory Lifecycle (for scheduled plans)

  • PM: write daily-profile-{today}.json
  • Weekly: absorb prev → archive to weekly-archive/ → rotate current→prev → write new → purge dailies
  • Monthly: absorb prev month → archive to monthly-archive/{YYYY-MM}.json → overwrite monthly-summary.json → purge weekly-archive older than current month → purge monthly-archive older than 6 months

Run Tags

Write runs/{date}-{type}.json (e.g., runs/2026-03-14-pm.json) before sending email. If tag exists, skip — already ran.

Instructions

When writing: validate against memory-schemas.md. When reading: handle missing files gracefully (bootstrap).

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. 5d ago First seen · 50 lines · 17 tokens per session scan A 8108910a4a41

Subscribe to this mod's changes

Dayarc Memory is a skill published in the GitHub repository YuiZhou/dayarc-agent (2 stars, last pushed 10d ago), licensed MIT. It adds 17 tokens to every session and 515 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 2026-08-31.

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