workflow-premortem

workflow-premortem is a skill for Claude Code from saemihemma/lead-producer-oss. It costs 60 tokens per session (1,032 once invoked), scanned A, original, MIT.

A structured exercise that imagines a high-stakes decision has already failed and works backward to find the causes. Each possible failure gets an early warning sign, a prevention step, and an owner.

In plain words
What is it for?
Reviewing launch plans, go/no-go decisions, and changes that could affect many users or systems.
Why use it?
It exposes serious risks before a costly or difficult-to-reverse decision is made.

Skill for Claude Code

Written for Claude Code: effort in frontmatter.

Good fit Reviewing launch plans, go/no-go decisions, and changes that could affect many users or systems.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/saemihemma/lead-producer-oss/workflow-premortem
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 saemihemma/lead-producer-oss --skill workflow-premortem
Clone the repo
git clone --depth 1 https://github.com/saemihemma/lead-producer-oss

Made for: Claude Code.

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 workflow-premortem

README.md
[![agentmods](https://agentmods.dev/badge/skills/saemihemma/lead-producer-oss/workflow-premortem/github.svg)](https://agentmods.dev/skills/saemihemma/lead-producer-oss/workflow-premortem)
Your own site
<a href="https://agentmods.dev/skills/saemihemma/lead-producer-oss/workflow-premortem"><img src="https://agentmods.dev/badge/skills/saemihemma/lead-producer-oss/workflow-premortem/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.

agentmods 80×15 button for workflow-premortem

Your own site · 80×15
<a href="https://agentmods.dev/skills/saemihemma/lead-producer-oss/workflow-premortem"><img src="https://agentmods.dev/badge/skills/saemihemma/lead-producer-oss/workflow-premortem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,032 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00060 $0.01032
Opus 5 $0.00030 $0.00516
Sonnet 5 $0.00012 $0.00206
Haiku 4.5 $0.00006 $0.00103

Measured 8d ago against content hash 6187abcd2200, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

workflow-premortem 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.

.claude/skills/workflow-premortem/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Pre-Mortem Workflow

Purpose

Surface failure modes of a high-stakes decision before commit by imagining it has already failed and reasoning backward. Produces a durable pre-mortem artifact: failure stories ranked by likelihood and impact, each with a leading indicator, a mitigation or kill-criterion, and an owner.

Use When

  • Decision is hard-to-reverse, launch-critical, or high-blast-radius
  • A go/no-go or irreversible commit is imminent and failure would be costly
  • Lead Producer's inline lightweight pre-mortem surfaced failure stories too heavy to resolve in a few lines
  • User explicitly asks for a pre-mortem

Do NOT Use When

  • Decision is cheaply reversible or low blast radius -> use the inline lightweight pre-mortem in the Devil's Advocate Protocol
  • Something is already broken in production -> workflow-incident-response
  • Root cause of an existing failure is unknown -> workflow-systematic-debugging
  • The task is iterating the quality of an existing artifact, not foreseeing a decision's failure -> workflow-specialist-hardening
  • No concrete decision exists yet, only broad unknowns -> workflow-project-discovery

Working Method

Phase 1: Frame the Decision

  1. State the decision in one sentence and the commit point: what becomes hard to undo, and when.
  2. Define "failure": the observable outcomes that would make this decision a clear mistake.
  3. Set the horizon (e.g. "3 months after launch") so failure stories are concrete.

Phase 2: Generate Failure Stories

  1. Assume the decision has already failed at the horizon. Generate distinct failure stories, narrating each backward from the failed end-state to its root cause.
  2. Pull domain-specific failure modes from relevant specialist perspectives by routing through LP. Do not invent reviewers.
  3. Separate confirmed risk from hypothesis. Prefix material unverified assumptions with UNCONFIRMED:.

Phase 3: Rank & Convert

  1. Rank failure stories by likelihood (high/medium/low) and impact (high/medium/low).
  2. For each story, define a leading indicator: the earliest observable signal that this failure is beginning.
  3. For each story, define a mitigation or kill-criterion and assign an owner.
  4. Drop stories that have no plausible mechanism. Do not pad the list for volume.

Read the full file on GitHub · 79 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. 8d ago First seen · 79 lines · 60 tokens per session scan A 6187abcd2200

Subscribe to this mod's changes

workflow-premortem is a skill published in the GitHub repository saemihemma/lead-producer-oss (2 stars, last pushed 8d ago), licensed MIT. It adds 60 tokens to every session and 1,032 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 2026-09-03.

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