retro

retro is a skill for Claude Code, Codex from shravan-swagwalapm/shipstack. It costs 32 tokens per session (1,234 once invoked), scanned A, original, MIT.

A work-session retrospective that reviews recent engineering activity and records lessons for future work.

In plain words
What is it for?
Use it to choose a review period, group commits into work sessions, summarize sprint activity, capture knowledge in a vault, and track trends.
Why use it?
It turns commits, discoveries, mistakes, decisions, and recurring patterns into notes that can improve later development sessions.

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/shravan-swagwalapm/shipstack/retro
Any agent
npx skills add shravan-swagwalapm/shipstack --skill retro
Clone the repo
git clone --depth 1 https://github.com/shravan-swagwalapm/shipstack

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 retro

README.md
[![agentmods](https://agentmods.dev/badge/skills/shravan-swagwalapm/shipstack/retro.svg)](https://agentmods.dev/skills/shravan-swagwalapm/shipstack/retro)
Your own site
<a href="https://agentmods.dev/skills/shravan-swagwalapm/shipstack/retro"><img src="https://agentmods.dev/badge/skills/shravan-swagwalapm/shipstack/retro.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,234 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 $0.00032 $0.01234
Opus 5 $0.00016 $0.00617
Sonnet 5 $0.00006 $0.00247
Haiku 4.5 $0.00003 $0.00123

Measured 5d ago against content hash 9a797609d4aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 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/shipstack/retro/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/retro — Retrospective + Knowledge Capture

Read and follow skills/shipstack/_preamble.md before proceeding.

You are an engineering manager running a retrospective. You extract patterns, capture knowledge, and track trends. Your goal is to make the next sprint better than this one.

Step 1: Determine Time Window

Ask the user: "What period should this retro cover?"

  • Default: since last retro (check ~/.shipstack/projects/$SLUG/reviews.jsonl for last retro entry)
  • If no prior retro: last 7 days

Step 2: Gather Data

Git Activity

Run:

  • git log --oneline --since="[start date]" → commit list
  • git log --format="%H %aI" --since="[start date]" → commit timestamps for session detection
  • git diff --stat [start hash]..HEAD → overall change summary

Work Session Detection

Parse commit timestamps. A gap of >45 minutes between consecutive commits = new session.

Classify sessions:

  • Deep session: >2 hours of consecutive commits
  • Medium session: 30 minutes to 2 hours
  • Micro session: <30 minutes

Report:

Work Sessions (last 7 days):
  Deep:   [N] sessions ([total hours]h)
  Medium: [N] sessions ([total hours]h)
  Micro:  [N] sessions
  Total:  [N] commits, [+added/-removed] lines

Pipeline Activity

Read ~/.shipstack/projects/$SLUG/reviews.jsonl entries within the time window:

  • How many skills were run?
  • How many findings (critical/informational)?
  • How many past mistakes were triggered?

Eureka Moments

Read ~/.shipstack/projects/$SLUG/eureka.jsonl entries within the time window.

Step 3: Analysis

What Went Well

  • Features shipped, bugs fixed, decisions made
  • Past mistakes that prevented bugs (knowledge paying off)

What Could Improve

  • Recurring patterns in findings
  • Stale reviews that were shipped anyway
  • Past mistakes triggered (knowledge not yet internalized)

Knowledge Compound Rate

Knowledge Metrics:
  Past mistakes in vault:    [N] total, [+N] this period
  Decisions recorded:        [N] total, [+N] this period
  Session journals:          [N] total, [+N] this period
  Past mistakes triggered:   [N] this period (goal: 0)
  Eureka insights:           [N] this period

Read the full file on GitHub · 157 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. 5d ago First seen · 157 lines · 32 tokens per session scan A 9a797609d4aa

Subscribe to this mod's changes

retro is a skill published in the GitHub repository shravan-swagwalapm/shipstack (19 stars, last pushed 5mo ago), licensed MIT. It adds 32 tokens to every session and 1,234 once invoked, about $0.0002 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.

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