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 skills/vercel-labs/zerolang/zeronpx skills add vercel-labs/zerolang --skill zerogit clone --depth 1 https://github.com/vercel-labs/zerolangWhat 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 | $0.00014 | $0.00927 |
| Opus 5 | $0.00007 | $0.00464 |
| Sonnet 5 | $0.00003 | $0.00185 |
| Haiku 4.5 | $0.00001 | $0.00093 |
Grade C, and why
zero scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
command -v zero >/dev/null 2>&1 || { curl -fsSL https://zerolang.ai/install.sh | bash; } Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
command -v zero >/dev/null 2>&1 || { curl -fsSL https://zerolang.ai/install.sh | bash; } How it starts
The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Zero
Zero is an agent-first programming language. zero.graph is the program; .0 files are projections of it. Edit through zero patch.
Install this skill once in an agent's skill manager. Keep it thin; Zero's own CLI serves the version-matched workflow for each installed compiler.
Use the zero already on PATH or at ~/.zero/bin/zero when one exists; environments often pin a specific compiler, and replacing it silently breaks version-matched stores and workflows. Install only when zero is missing:
command -v zero >/dev/null 2>&1 || { curl -fsSL https://zerolang.ai/install.sh | bash; }
export PATH="$PATH:$HOME/.zero/bin"
zero --version
Version-Matched Skills
This file is only a discovery stub. Do not treat it as the full Zero workflow or as command reference.
Before editing, checking, testing, or repairing Zero code, ask the installed compiler for the skill content that matches that exact binary:
zero skills
zero skills get zero
zero skills get zero --full
zero skills get stdlib --topic std.time # one section instead of the whole topic
If the user has multiple Zero binaries, use the same binary that will run the project:
/path/to/zero skills
/path/to/zero skills get zero --full
Use zero skills get <name> to load only what the task needs, and fetch each
topic at most once per session: the content is fixed for a given compiler
binary, so refetching a loaded topic returns the same text. Topics and
approximate served sizes:
zero(~2 KB): this discovery stubagent(~4 KB): read-edit-verify loop, zero query usage, edit surfaces, verificationlanguage(~6 KB): syntax, types, effects, control flow, genericsgraph(~9 KB): zero.graph store, query/view, patch operations, import/export/mergediagnostics(~4 KB): reading diagnostics, zero explain, typed fix planspackages(~5 KB): manifests, package layout, creation and repairbuilds(~5 KB): build/run, targets, profiles, emitted artifactstesting(~3 KB): test blocks, filters, runtime checksstdlib(~39 KB): full signature reference, including ready-made validators:std.time(RFC 3339 incl. the exact leap-second rule),std.inet(IPv4/IPv6/hostname),std.regex(ECMA subset),std.unicode(strict UTF-8). Check here before hand-writing any parsing or validation logic. Fetch one module's section (~1 KB) withzero skills get stdlib --topic <prefix>, e.g.--topic std.time.
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.
- 2d ago First seen · 74 lines · 14 tokens per session scan C c66ceac43509
zero is a skill published in the GitHub repository vercel-labs/zerolang (5,346 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 14 tokens to every session and 927 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
brainstorming
You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.
auto-perf-optimize
Run agent-driven VS Code performance or memory investigations. Use when asked to launch Code OSS, automate a VS Code scenario, run the Chat memory smoke runner, capture renderer heap snapshots, take workflow screenshots, compare run summaries, or drive a repeatable scenario before heap-snapshot analysis.
chat-perf
Run chat perf benchmarks and memory leak checks against the local dev build or any published VS Code version. Use when investigating chat rendering regressions, validating perf-sensitive changes to chat UI, or checking for memory leaks in the chat response pipeline.
chat-pet-sprite-creation
Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.
cpu-profile-analysis
Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…