post-mortem

A command for reviewing a completed coding session or task and identifying lessons for future work.

In plain words
What is it for?
Use it after a task or conversation to assess the work and record practical improvements.
Why use it?
It helps uncover what went well, what caused friction, and which parts of the process could be improved.

Command

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 commands/rileyhilliard/agentrc/post-mortem
Clone the repo
git clone --depth 1 https://github.com/rileyhilliard/agentrc
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 136 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 $0.00011 $0.00136
Opus 5 $0.00005 $0.00068
Sonnet 5 $0.00002 $0.00027
Haiku 4.5 $0.00001 $0.00014

Measured 2d ago against content hash 3d670b1dafb7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

post-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 2d 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.

.agentrc/commands/post-mortem.md · 17 lines

What it actually says

Review the current session (or the specified task/context) and identify what we can learn from it.

Load the post-mortem skill for guidance: Skill(ce:post-mortem)

If $ARGUMENTS is provided:

  • Use the specified context to focus the review.

If $ARGUMENTS is empty:

  • Review the current conversation/session.
  • Walk through what was attempted, what happened, and where friction occurred.
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. 2d ago First seen · 17 lines · 11 tokens per session scan A 3d670b1dafb7

Subscribe to this mod's changes

post-mortem is a command published in the GitHub repository rileyhilliard/agentrc (3 stars, last pushed 6mo ago), licensed MIT. It adds 11 tokens to every session and 136 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 2026-08-31.