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 agentmods add commands/stealthsrc/steam-mcp/coopgit clone --depth 1 https://github.com/stealthsrc/steam-mcpWhat 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 | $0.00018 | $0.00306 |
| Opus 5 | $0.00009 | $0.00153 |
| Sonnet 5 | $0.00004 | $0.00061 |
| Haiku 4.5 | $0.00002 | $0.00031 |
Grade A, and why
coop 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 yesterday.
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
Find common games between: $ARGUMENTS
The argument contains two Steam identifiers separated by a space (SteamID64 or vanity URLs).
Example: stealthylabs gabelogannewell or gabelogannewell robinwalker
Do the following in parallel:
steam_get_owned_gamesfor the first player (limit: 500, include_appinfo: true, sort_by: "playtime")steam_get_owned_gamesfor the second player (limit: 500, include_appinfo: true, sort_by: "playtime")
Then compute the intersection: games where the AppID exists in both libraries.
Present the results:
Games in common - {Player1} & {Player2}
{X} games in common out of {Y} and {Z} total games.
Show a table of shared games sorted by combined playtime (player1 + player2):
| Game | AppID | {Player1} playtime | {Player2} playtime | Combined |
|---|
Limit to the top 20 results.
After the table, add store links for the top 5:
- {Game Name}: https://store.steampowered.com/app/{appid}/
If one or both libraries are private, explain which player's library could not be accessed.
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.
- yesterday First seen · 33 lines · 18 tokens per session scan A 76b48b8b2b04
coop is a command published in the GitHub repository stealthsrc/steam-mcp (1 stars, last pushed 8d ago), licensed MIT. It adds 18 tokens to every session and 306 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.
Other commands, from other repositories
git
Git operations with intelligent commit messages and workflow optimization.
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
constitution
Create or update the project constitution from interactive or provided principle inputs.