Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add AlterLab-IEU/AlterLab_GameForge/plugin install gameforgeWrote 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/alterlab-ieu/alterlab_gameforge/game-postmortem)<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab_gameforge/game-postmortem"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab_gameforge/game-postmortem/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.
<a href="https://agentmods.dev/skills/alterlab-ieu/alterlab_gameforge/game-postmortem"><img src="https://agentmods.dev/badge/skills/alterlab-ieu/alterlab_gameforge/game-postmortem.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00087 | $0.04078 |
| Opus 5.5 | $0.00035 | $0.01631 |
| Sonnet 5.5 | $0.00017 | $0.00816 |
| Haiku 4.5 | $0.00009 | $0.00408 |
Grade A, and why
game-postmortem 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 344 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AlterLab GameForge -- Project Post-Mortem
Every shipped game has a story behind it that is worth more to the next project than the game itself. The post-mortem is where that story is extracted, structured and turned into reusable knowledge. Without one, the team repeats the same mistakes on the next project, not because it is incompetent but because memory is selective and unstructured reflection drifts toward narratives instead of patterns. The GDC Vault and decades of Game Developer magazine postmortems exist because studios learned this the hard way.
A good post-mortem is not a blame session and not a victory lap. It is a structured data extraction: facts first, then reflection, then patterns, then a small number of lessons that each change something concrete.
Projects built with coding agents add a question earlier post-mortems never had to answer: what did the agents actually contribute, and what did they cost? This workflow answers it per milestone, with numbers, so the next project can decide where agents belong.
Relationship to game-retrospective
game-retrospective handles sprints and milestones: short cycles, immediate actions for the next
sprint. The post-mortem covers a whole project or a major phase and looks for systemic patterns
across those cycles. It ingests every retro it can find.
- "What should we do differently next sprint?" ->
/gameforge:game-retrospective - "What should we do differently next project (or next phase)?" -> this skill
When to Use / When Not To
Use after a launch, a cancellation, a major milestone (vertical slice, alpha, beta, 1.0), before starting a new project (to retrieve and apply the last post-mortem), or when a new team member asks "what went wrong last time?"
| Instead of this skill... | Use |
|---|---|
| A single sprint or milestone retro | /gameforge:game-retrospective |
| Reviewing the design document | /gameforge:game-design-review |
| Live-game metrics and KPIs after launch | /gameforge:game-analytics-setup |
| Starting the next project with these lessons | /gameforge:game-start |
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- today Changed · -41 lines · -20 tokens per session f586b7186178
- 2mo ago First seen · 385 lines · 107 tokens per session scan A d78baaac1b5f
game-postmortem is a skill published in the GitHub repository AlterLab-IEU/AlterLab_GameForge (52 stars, last pushed yesterday), licensed MIT. It adds 87 tokens to every session and 4,078 once invoked, about $0.0003 per session on Opus 5.5. 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.
game-postmortem compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| game-postmortemAlterLab-IEU/AlterLab_GameForge | Skill | 52 | yesterday | MIT | A | 87 | Claude Code |
| imagegenopenai/codex | Skill | 133k | today | Apache-2.0 | A | 113 | Codex |
| playwright-climicrosoft/playwright | Skill | 99k | yesterday | Apache-2.0 | A | 19 | Claude Code |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | 4d ago | MIT | A | 200 | Claude Code, Codex |
| systematic-debuggingobra/superpowers | Skill | 313k | 3d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | today | MIT | A | 95 | Claude Code |
| chat-pet-sprite-creationmicrosoft/vscode | Skill | 195k | today | MIT | A | 53 | Claude Code, Codex |