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.
npx skills add NickCrew/Claude-Cortex --skill pre_mortemgit clone --depth 1 https://github.com/NickCrew/Claude-CortexWrote 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.
[](https://agentmods.dev/skills/nickcrew/claude-cortex/pre_mortem)<a href="https://agentmods.dev/skills/nickcrew/claude-cortex/pre_mortem"><img src="https://agentmods.dev/badge/skills/nickcrew/claude-cortex/pre_mortem.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00017 | $0.00331 |
| Opus 5 | $0.00009 | $0.00166 |
| Sonnet 5 | $0.00003 | $0.00066 |
| Haiku 4.5 | $0.00002 | $0.00033 |
Grade A, and why
pre-mortem 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 3d 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.
What it actually says
/collaboration:pre-mortem
Use when planning initiatives where early risk surfacing saves rework.
Inputs
- Initiative and horizon (30/90/180 days)
- Success definition
- Known risks/compliance constraints
Steps
- Define success state and horizon (default 90 days).
- List top failure modes across tech, UX, org, market, compliance.
- For each, propose mitigations/guardrails with Effort (S/M/L) and Owner.
- Pull 2–3 mitigations that double as feature ideas.
- Create Tasks for guardrails or pass to
/ctx:plan.
Output Template
### Success State (horizon)
### Failure Modes
### Mitigations & Guardrails (effort, owner)
### Feature Candidates from Mitigations
### Immediate Tasks
Pairings
- Run after
/collaboration:concept-forgeto sanity-check top concepts. - Feed guardrails into
/dev:code-reviewor security skills as needed.
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.
- 3d ago First seen · 49 lines · 17 tokens per session scan A dbf53c20314b
pre-mortem is a skill published in the GitHub repository NickCrew/Claude-Cortex (37 stars, last pushed 2mo ago), licensed MIT. It adds 17 tokens to every session and 331 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 2026-09-03.
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