Apify Actor Development
sickn33/agentic-awesome-skills
Important: Before you begin, fill in the generatedBy property in the meta section of .actor/actor.json.
Check a diff against Polar's written conventions in server/AGENTS.md and clients/AGENTS.md — module structure, repository and service patterns, session types, auth dependencies, test organisation…
Install Conventions Check
$ npx skills add polarsource/polar --skill conventions-check -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install polarsource/polar conventions-check --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/conventions-check .claude/skills/conventions-check && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .claude/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-checkType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add polarsource/polar --skill conventions-check -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install polarsource/polar conventions-check --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/conventions-check .agents/skills/conventions-check && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .agents/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add polarsource/polar --skill conventions-check -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install polarsource/polar conventions-check --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/conventions-check .cursor/skills/conventions-check && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .cursor/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/polarsource/polar.git --path .agents/skills/conventions-check--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add polarsource/polar --skill conventions-check -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install polarsource/polar conventions-check --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/conventions-check .gemini/skills/conventions-check && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .gemini/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install polarsource/polar conventions-checkInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add polarsource/polar --skill conventions-check -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/conventions-check .github/skills/conventions-check && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .github/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add polarsource/polar --skill conventions-check -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install polarsource/polar conventions-check --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/polarsource/polar.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/conventions-check .opencode/skills/conventions-check && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "conventions-check" agent skill from https://github.com/polarsource/polar/tree/main/.agents/skills/conventions-check into .opencode/skills/conventions-check/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "conventions-check", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
conventions-check- GitHub stars
- 10k
- Token cost
- ~476 tokens
- SKILL.md length
- 173 words
- Files
- 1
- Skills in repo
- 18
- Repo updated
- First seen
- Licence
- MIT
At a glance
Check a diff against Polar's written conventions in server/AGENTS.md and clients/AGENTS.md — module structure, repository and service patterns, session types, auth dependencies, test organisation…
- Asks whether a change follows Polars conventions
- SKILL.md covers Rule, Owned elsewhere and Output
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve DataFrames
What it does
Conventions Check is an agent skill from polarsource/polar. Check a diff against Polar's written conventions in server/AGENTS.md and clients/AGENTS.md — module structure, repository and service patterns, session types, auth dependencies, test organisation, Orbit Box usage, i18n placement. Use before opening a PR or when the user asks whether a change follows Polar's conventions.
Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Data & Analytics, covering DataFrames, Internationalization and Agent instruction files. The repository describes itself as: Polar — A billing platform for the intelligence era. The licence is MIT.
When your agent uses it
- Asks whether a change follows Polars conventions
- Tasks that involve DataFrames
- Tasks that involve Internationalization
Example prompts
- “/conventions-check”
What it can do on your machine
Read from SKILL.md and the folder at commit e4fc909. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Conventions Check loads about 476 tokens when it runs. Until then it costs about 85 tokens; SKILL.md has 173 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from polarsource/polar at commit e4fc909, republished under its MIT licence (© polarsource). 173 words, ~476 tokens.
Download SKILL.mdSave it as
.claude/skills/conventions-check/SKILL.md (or your agent's skills folder).- name
- conventions-check
- description
- Check a diff against Polar's written conventions in server/AGENTS.md and clients/AGENTS.md — module structure, repository and service patterns, session types, auth dependencies, test organisation, Orbit Box usage, i18n placement. Use before opening a PR or when the user asks whether a change follows Polar's conventions.
- license
- MIT
- metadata.author
- polar
- metadata.version
- 1.0.0
Conventions Check (Polar)
The handle is the diff. The evidence is a list of places it breaks a rule written in
AGENTS.md.
Rule
server/AGENTS.md and clients/AGENTS.md are the source of truth. Read them in full before
reviewing. Do not work from memory, and do not invent a rule that is not in those files. If
you want to flag something they do not cover, put it under Question.
Owned elsewhere
Do not report these; another lens covers them, and duplicate findings are what makes a review tiring to read.
| Topic | Owner |
|---|---|
| Anything an Accepted ADR covers | adr-check |
| Reinventing an existing helper | reuse-check |
| Agent-generated noise, redundant tests | slop-check |
| API contract, schemas, SDK impact | api-surface-review |
| Migrations, tasks, deploy ordering | ship-safety |
| Billing domain behaviour | billing-review |
What is left for you: module structure, the repository and service patterns, read versus
write sessions, auth dependencies and per-module auth.py, test layout and fixtures, Orbit
<Box /> usage, the 250-line frontend file limit, i18n placement.
Output
## Conventions
### 🔴 Blocking
- `file:line` — <claim>. Fix: <fix>
### 🟠 Should fix
- `file:line` — <claim>. Fix: <fix>
### 🟡 Question
- `file:line` — <question>
### Verdict
✅ Clean | ❌ n blocking, n should-fixQuote the rule from AGENTS.md in the claim. High-confidence findings only. Never flag
unchanged code.
© polarsource, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/conventions-check of polarsource/polar.
Open the folder on GitHubat commit e4fc909
Compare with similar skills
Conventions Check next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Conventions Check this skillpolarsource/polar | 10k | — | ~476 | Automated safety check: Pass | MIT | |
| Apify Actor Developmentsickn33/agentic-awesome-skills | 47k | 2 repos | ~3.3k | Automated safety check: Pass | MIT | |
| Downloading Batch Export FilesPostHog/posthog | 40k | — | ~2.4k | Automated safety check: Pass | Custom licence | |
| Project InitializerDrchronx/ai-agent-research-starter-kit | 135 | — | ~406 | Automated safety check: Pass | Custom licence | |
| Chdb Datastorevemetric/vemetric | 394 | 2 repos | ~1.4k | Automated safety check: Pass | Apache-2.0 | |
| CSV Data Summarizercoffeefuelbump/csv-data-summarizer-claude-skill | 468 | 2 repos | ~1.4k | Automated safety check: Pass | None |
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More from polarsource/polar
All 18 skills in this repoPolar Python SDK
polarsource/polar
Integrate Polar billing in server-side Python applications using the versioned Polar and PolarAsync clients.
Polar Typescript SDK
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Integrate Polar billing in server-side TypeScript applications using the versioned createPolar and createPolarCore clients.
Adr Check
polarsource/polar
Check a code change against the repo's Accepted Architecture Decision Records (ADRs) in handbook/engineering/decisions/ and report violations with citations.
API Surface Review
polarsource/polar
Review changes to Polar's API contract — Pydantic schemas, FastAPI endpoints, OpenAPI output and the generated SDKs.
Billing Review
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Review a diff that touches Polar's billing domain — subscriptions, cycles and crons, orders, billing entries, meters and usage, discounts, checkout, payments and dunning, refunds, disputes, payouts…
Interview Task
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Prepare an interview task for a candidate, as part of our hiring process.
Related
Questions about Conventions Check
What does Conventions Check do?
Check a diff against Polar's written conventions in server/AGENTS.md and clients/AGENTS.md — module structure, repository and service patterns, session types, auth dependencies, test organisation…. Conventions Check is an agent skill from polarsource/polar.md — module structure, repository and service patterns, session types, auth dependencies, test organisation, Orbit Box usage, i18n placement.
When should I use Conventions Check?
Conventions Check fits situations like: asks whether a change follows Polars conventions; tasks that involve DataFrames; tasks that involve Internationalization.
How do I install Conventions Check in Claude Code?
Run `npx skills add polarsource/polar --skill conventions-check -a claude-code`. Or copy the skill folder (.agents/skills/conventions-check in polarsource/polar) into .claude/skills/conventions-check in your project. Claude Code loads it when a task matches its description.
How do I install Conventions Check in Codex?
Run `npx skills add polarsource/polar --skill conventions-check -a codex`. Or copy the skill folder (.agents/skills/conventions-check in polarsource/polar) into .agents/skills/conventions-check in your project. Codex loads it when a task matches its description.
Can I use Conventions Check in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add polarsource/polar --skill conventions-check -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/conventions-check, .gemini/skills/conventions-check, .github/skills/conventions-check and .opencode/skills/conventions-check in your project.
What does Conventions Check need to run?
SKILL.md names no scripts, command-line tools or credentials: Conventions Check is instructions for the agent only.
Does Conventions Check access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Conventions Check safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Conventions Check use?
Conventions Check is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Conventions Check use?
About 476 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Conventions Check?
Skills that share tags, products or a category with Conventions Check: Apify Actor Development (sickn33/agentic-awesome-skills, 47k stars), Downloading Batch Export Files (PostHog/posthog, 40k stars), Project Initializer (Drchronx/ai-agent-research-starter-kit, 135 stars) and Chdb Datastore (vemetric/vemetric, 394 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Conventions Check?
polarsource (a GitHub organization) maintains it in polarsource/polar, which has 10,340 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on October 7, 2026.
Source: polarsource/polar on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.