Getting it into your agent
There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.
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.
[](https://agentmods.dev/skills/agentsope/skillalchemy/agentsop-conventions-pinning)<a href="https://agentmods.dev/skills/agentsope/skillalchemy/agentsop-conventions-pinning"><img src="https://agentmods.dev/badge/skills/agentsope/skillalchemy/agentsop-conventions-pinning/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/agentsope/skillalchemy/agentsop-conventions-pinning"><img src="https://agentmods.dev/badge/skills/agentsope/skillalchemy/agentsop-conventions-pinning.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 | $0.00104 | $0.09149 |
| Opus 5 | $0.00052 | $0.04574 |
| Sonnet 5 | $0.00021 | $0.01830 |
| Haiku 4.5 | $0.00010 | $0.00915 |
Grade A, and why
agentsop-conventions-pinning scanned grade A with 2 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 9d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| 3 | Add a counter-example: "Wrong: `requests.get(url)`. Right: `httpx.get(url, timeout=10)`" | Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
| Anti-pattern: "Never use `os.system`; use `subprocess.run`." | "TODO: write better docs here." (file is not a TODO list) | How it starts
The opening of the file, as written. The whole thing — 470 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Conventions Pinning — Writing a Style Guide Your Coder-Agent Will Actually Read
One line: a conventions file is the system prompt of your codebase. Treat it like a system prompt, not like a README. Anti-patterns: writing prose, narrating history, marketing the project. Patterns: command-first, verifiable, "prefer X over Y", < 200 lines.
1. 何时激活 (When to Activate)
1.1 Direct triggers
- The user (human or upstream agent) asks "how do I make Claude/Cursor/Cline/Aider respect our style?".
- The same correction has been typed in chat ≥ 2 times this week ("use httpx not requests", "add type hints", "no comments on every line"). Claude Code's docs codify this rule: "Add to it when Claude makes the same mistake a second time." [code.claude.com/docs/en/memory]
- A new project is past the "first 2 modules" phase — there are now style choices implicit in the code that an outsider (or fresh-context agent) can't see.
- The team is switching coder-tools (Aider → Claude Code, or adding Cursor) and conventions are scattered in chat history.
- An AI code review caught the same anti-pattern twice.
1.2 Reverse triggers (skip)
- One-off / throwaway scripts. The write-cost of a conventions file is fixed; the savings are proportional to session count. < 3 sessions → don't bother.
- True greenfield. The first 2-3 files of a project ARE the convention. Pinning style before the style exists locks in arbitrary choices.
- Hard enforcement needed. A conventions file is context, not a hook. Claude Code's docs are explicit: "CLAUDE.md instructions shape Claude's behavior but are not a hard enforcement layer." [code.claude.com/docs/en/memory] If the rule must run every time (e.g. "must
make lintbefore commit"), write a hook / precommit / CI check. - The rule is already in a config that the agent can read —
.eslintrc,pyproject.toml,.editorconfig,tsconfig.json. Point the agent at the config; don't duplicate.
1.3 Mental check
A conventions file earns its tokens only if it contains information that is not already in the repository. The research is unambiguous on this: "Developer-written context files performed better for exactly the reason you'd guess: they contained information that wasn't already in the repository — tooling preferences, workflow requirements, conventions that existed in developers' heads but not in any documentation." [developer.upsun.com/posts/ai/agents-md-less-is-more]
What ships with it
4 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.
- 9d ago First seen · 470 lines · 104 tokens per session scan A 5da005ad31d4
agentsop-conventions-pinning is a skill published in the GitHub repository agentsope/SkillAlchemy (377 stars, last pushed 6d ago), licensed MIT. It adds 104 tokens to every session and 9,149 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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