A command for summarizing Claude Code work from the current session or from all sessions on today’s or yesterday’s date.

Use it to view a current-session summary or generate saved daily reports for today or yesterday, with an option to regenerate cached reports.

It turns session history into a concise review and can save daily reports for later reference.

retro — Skill for Claude Code by artem-from-ua

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 artem-from-ua/claude-plugins --skill retro

Clone the repo

git clone --depth 1 https://github.com/artem-from-ua/claude-plugins

Made for: Claude Code.

Or install retroscope, the plugin that ships this one along with the rest of its 2 skills.

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/artem-from-ua/claude-plugins/retro.svg)](https://agentmods.dev/skills/artem-from-ua/claude-plugins/retro)

Your own site

<a href="https://agentmods.dev/skills/artem-from-ua/claude-plugins/retro"><img src="https://agentmods.dev/badge/skills/artem-from-ua/claude-plugins/retro.svg" alt="Measured on agentmods" height="20"></a>

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 739 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	$0.00056	$0.00739
Opus 5	$0.00028	$0.00369
Sonnet 5	$0.00011	$0.00148
Haiku 4.5	$0.00006	$0.00074

Measured 8d ago against content hash 32f4be8cf166, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

retro 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 8d 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.

plugins/retroscope/commands/retro/SKILL.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/retro — Session Retrospective Report

Generate a retrospective summary of Claude Code session(s).

Modes

Mode	Description	Storage
`session`	Summarize current session from context	Display only (not saved)
`today`	Aggregate all today's sessions	Saved to storage repo + git commit
`yesterday`	Aggregate all yesterday's sessions	Saved to storage repo + git commit

Add --force to any mode to regenerate even if a cached report exists (e.g., /retro today --force).

Step 1: Load Config

Look for config in this order:

{CLAUDE_PROJECT_DIR}/.claude-plugin/retroscope.json (project-level, preferred)
{CLAUDE_PROJECT_DIR}/.claude/retroscope.json (project-level, legacy fallback)
~/.claude/retroscope.json (user-level)

If no config found: ask the user whether to run setup now using AskUserQuestion:

Option A: "Yes, run setup now" → invoke /retroscope:setup skill and stop.
Option B: "No, continue without config" → continue with defaults (sessionSource: logs, display-only, no storage).

Step 2: Determine Mode

You MUST ask the user which mode they want. Do NOT skip this step or assume a default.

If the user provided a mode argument (e.g., /retro session, /retro today), use it. Otherwise use AskUserQuestion with options: session, today, yesterday.

Parse the user's argument for both mode and flags. If --force is present, set force = true and strip it from the mode argument before further processing.

If no config was found (user chose to continue without config):

Only session mode is available (no storage configured for today/yesterday).
Skip the mode question and use session mode directly, showing a note: "💡 Tip: Run /retroscope:setup to enable daily reports (today/yesterday)."

Config fields used:

storageDir — where to save reports (REQUIRED for today/yesterday)
language — report language (default: English)
model — report generation model: haiku, sonnet, or inherit (default: haiku)
extractMode — pre-filter sessions to text-only (default: true)
sessionSource — data source for /retro session: logs (default) or context
scope — report scope: project (default, current project only) or all (cross-project daily reports)
autoPush — git push after commit (default: false)
timezone — timezone for date calculations (default: system)

Read the full file on GitHub · 63 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

8d ago First seen · 63 lines · 56 tokens per session scan A 32f4be8cf166

Subscribe to this mod's changes

retro is a skill published in the GitHub repository artem-from-ua/claude-plugins (11 stars, last pushed today), licensed MIT. It adds 56 tokens to every session and 739 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 2026-08-30.

Writing and docs

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

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