What is Summarize Period?

A tool for combining daily or weekly work records into a period summary. It tracks themes, completed work, unresolved problems, and next priorities.

Use it to create weekly or monthly summaries, calculate each theme's share of effort, list accomplishments, carry forward stuck items, and suggest the next focus.

It removes the need to manually collect repeated updates and identify unfinished work across several days or weeks.

Summarize Period — Skill for Claude Code and Codex by YuiZhou

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 YuiZhou/dayarc-agent --skill dayarc-summarize-period

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/yuizhou/dayarc-agent/dayarc-summarize-period/github.svg)](https://agentmods.dev/skills/yuizhou/dayarc-agent/dayarc-summarize-period)

Your own site

<a href="https://agentmods.dev/skills/yuizhou/dayarc-agent/dayarc-summarize-period"><img src="https://agentmods.dev/badge/skills/yuizhou/dayarc-agent/dayarc-summarize-period/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/yuizhou/dayarc-agent/dayarc-summarize-period"><img src="https://agentmods.dev/badge/skills/yuizhou/dayarc-agent/dayarc-summarize-period.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 455 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.

Model	Per session	Once invoked
Fable 5.1	$0.00015	$0.00455
Opus 5	$0.00008	$0.00228
Sonnet 5	$0.00003	$0.00091
Haiku 4.5	$0.00002	$0.00046

Measured 10d ago against content hash a412a5f78a05, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Summarize Period 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 10d 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-summarize-period/SKILL.md · 30 lines

What it actually says

Input

For weekly: all daily profiles + previous weekly. For monthly: all weekly summaries + previous monthly.

Output (JSON)

{
  "themes": [{ "label": "auth migration", "effort_share": 0.6, "progress": "Completed token refresh." }],
  "accomplishments": ["Merged PR #1234"],
  "stuck": [{ "description": "ARM CI pipeline flaky", "days_or_weeks": 4 }],
  "focus_next": ["Finish auth rollout"]
}

Instructions

Merge focus_areas across input profiles — weight by confidence and frequency.
Compute effort_share per theme (sum to ~1.0).
Extract accomplishments: merged PRs, resolved threads, milestones. Deduplicate.
Extract stuck items: unfinished on 2+ days (weekly) or 2+ weeks (monthly).
Suggest focus_next from momentum + carryover + stuck.
If previous summary provided, absorb unresolved items into absorbed_from_previous.
Weekly only — aggregate brief quality: Scan the feedback field across all input daily profiles. For each profile with a feedback entry, tally rated (count), positive (count where sentiment == "positive"), negative (count where sentiment == "negative"), and collect all distinct negative detail strings into themes. Emit as brief_quality: { rated, positive, negative, themes }. If no daily profiles had a feedback field, omit brief_quality.
Monthly only — roll up brief quality: Sum rated, positive, and negative across all input weekly brief_quality fields. Merge themes arrays and deduplicate. Emit as brief_quality. If no weekly summaries had brief_quality, omit the field.
Preserve the input periods' impact_summaries as evidence for dayarc-write-impact-summary. Do not flatten them into generic accomplishment bullets or invent impact here; the shared impact skill performs that synthesis.

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.

10d ago First seen · 30 lines · 15 tokens per session scan A a412a5f78a05

Subscribe to this mod's changes

Summarize Period is a skill published in the GitHub repository YuiZhou/dayarc-agent (2 stars, last pushed 15d ago), licensed MIT. It adds 15 tokens to every session and 455 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.

Analytics and metrics Productivity

orbit-notion

Open Orbit briefing skill — selected by the Orbit pipeline when Notion is the user's only connected connector, or when the user explicitly scopes their daily digest to Notion. Pulls the past 24 hours of document edits, comments, mentions, and database row changes from the user's authenticated Notion connection and…

nexu-io/open-design · 117 tokens

Cortex

Operate Cortex, the LifeOS memory system — the typed Knowledge Archive (People, Companies, Ideas, Research with typed related: links) plus recall of prior work sessions, ISAs, and conversations. Search, add, harvest, develop, ingest, distill, graph-navigate, recall. USE WHEN cortex, knowledge, knowledge base, search…

danielmiessler/LifeOS · 196 tokens

pinchtab-mcp

Use this skill when a task requires browser automation through PinchTab's MCP server connected to a remote browser instance. Covers navigation, element interaction, data extraction, form filling, multi-step flows, and session management via MCP tools.

pinchtab/pinchtab · 52 tokens

Summarize Period