post-mortems-retrospectives

refoundai/lenny-skills · updated Apr 8, 2026

$npx skills add https://github.com/refoundai/lenny-skills --skill post-mortems-retrospectives
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summary

Guide teams through learning-focused post-mortems and retrospectives using frameworks from 11 product leaders.

  • Helps frame exercises as blameless learning opportunities rather than blame-focused reviews, with emphasis on psychological safety and honest sharing
  • Covers core principles including pre-mortems with kill criteria, reframing failure as growth, and institutionalizing weekly impact and learnings reviews
  • Guides users through structured questioning to surface systemic insights,
skill.md

Post-mortems & Retrospectives

Help the user run effective post-mortems and retrospectives that drive genuine learning using frameworks from 11 product leaders.

How to Help

When the user asks for help with post-mortems or retrospectives:

  1. Understand the context - Ask whether this is after a failure, a success, or a routine checkpoint
  2. Set the right tone - Help them frame the exercise as learning-focused rather than blame-focused
  3. Structure for insights - Guide them toward formats that surface actionable learnings
  4. Ensure follow-through - Help them create mechanisms to act on what they learn

Core Principles

Pre-mortems need kill criteria

Annie Duke: "A pre-mortem is only effective if it results in 'kill criteria' - pre-determined signals that will trigger a pivot or shutdown." Identify early signals that a project is failing during the pre-mortem and pre-commit to specific actions if those signals are met.

Reframe failure as growth

Carole Robin: "The acronym is A-F-O-G, another F-ing... Another Fucking Opportunity for Growth. My question, when something has gone wrong or a person has experienced a failure, my first question is always, so what did you learn?" When a failure occurs, immediately ask "What is the lesson here?" to maintain perspective during painful setbacks.

Call them retrospectives, not post-mortems

Eeke de Milliano: "Instead of calling something a postmortem, call it a retrospective, so that it's a positive thing. Like, 'Hey, we're learning from this thing.'" Reframing helps normalize failure and focuses the team on learning rather than blame.

Institutionalize learning reviews

Ben Williams: "We have these team level impact and learnings reviews... The teams continuously document any learnings from data exploration, from experimentation, from user research." Hold weekly "Impact and Learnings" reviews focused on insights rather than status updates, and socialize learnings across the entire company.

Grade OKRs for learning, not performance

Christina Wodtke: "What matters is, why 80%? Really focus on the learning... Make sure your grading is secondary to retrospective." The value of grading OKRs lies in the retrospective analysis of why a goal was or wasn't hit, not the number itself. Use end-of-quarter retrospectives to identify systemic blockers.

Make it blameless

The goal is to understand what happened and why, not to assign blame. Create psychological safety so people can share honestly without fear of punishment.

Questions to Help Users

  • "What did we learn that we didn't know before starting this project?"
  • "If we had to do this again with the same information we had at the start, what would we do differently?"
  • "What signals did we see early that we ignored or missed?"
  • "What systemic issues contributed to this outcome that we should address?"
  • "What kill criteria should we set for similar projects in the future?"
  • "How will we ensure these learnings actually influence future decisions?"

Common Mistakes to Flag

  • Blame-focused framing - Turning the exercise into finding fault rather than understanding systems
  • No follow-through - Running retrospectives but never acting on the learnings
  • Only reviewing failures - Missing the opportunity to learn from successes and understand what drove them
  • Optimizing the score, not the learning - Focusing on what percentage of OKRs were achieved rather than why
  • One-time events - Running retrospectives only for big failures instead of making them a regular practice

Deep Dive

For all 13 insights from 11 guests, see references/guest-insights.md

Related Skills

  • running-effective-meetings
  • running-decision-processes
  • planning-under-uncertainty

Discussion

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general reviews

Ratings

4.672 reviews
  • Ganesh Mohane· Dec 28, 2024

    I recommend post-mortems-retrospectives for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.

  • Camila Mensah· Dec 28, 2024

    post-mortems-retrospectives fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.

  • James Verma· Dec 28, 2024

    post-mortems-retrospectives is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.

  • Shikha Mishra· Dec 24, 2024

    post-mortems-retrospectives is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.

  • Benjamin Park· Dec 24, 2024

    We added post-mortems-retrospectives from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.

  • Nia Garcia· Dec 20, 2024

    I recommend post-mortems-retrospectives for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.

  • Benjamin Khan· Dec 12, 2024

    Solid pick for teams standardizing on skills: post-mortems-retrospectives is focused, and the summary matches what you get after install.

  • Kiara Sanchez· Dec 12, 2024

    Keeps context tight: post-mortems-retrospectives is the kind of skill you can hand to a new teammate without a long onboarding doc.

  • Camila Okafor· Nov 23, 2024

    I recommend post-mortems-retrospectives for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.

  • Chen Tandon· Nov 19, 2024

    post-mortems-retrospectives reduced setup friction for our internal harness; good balance of opinion and flexibility.

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