Borrowing it
Nothing to install: this file belongs to kaptinlin/gozod. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/kaptinlin/gozod/main/CLAUDE.mdgit clone --depth 1 https://github.com/kaptinlin/gozodWrote 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/instructions/kaptinlin/gozod/claude-md)<a href="https://agentmods.dev/instructions/kaptinlin/gozod/claude-md"><img src="https://agentmods.dev/badge/instructions/kaptinlin/gozod/claude-md/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/instructions/kaptinlin/gozod/claude-md"><img src="https://agentmods.dev/badge/instructions/kaptinlin/gozod/claude-md.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 | $0.03776 | $0.03776 |
| Opus 5.5 | $0.01510 | $0.01510 |
| Sonnet 5.5 | $0.00755 | $0.00755 |
| Haiku 4.5 | $0.00378 | $0.00378 |
Grade A, and why
gozod CLAUDE.md 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 2mo 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.
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 — 215 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GoZod
GoZod is a TypeScript Zod v4-inspired validation library for Go 1.26.5. The root package is a user-facing facade over concrete schemas in types/, shared contracts in core/, runtime machinery in internal/, struct-tag helpers in pkg/tagparser, and JSON Schema conversion in jsonschema/.
- Reference implementations:
.reference/zod/for Zod v4 semantics,.reference/valibot/for validation composition and issue propagation, and.reference/validator/for Go reflection and declared-type handling. - User-facing usage: see README.md, docs/, and examples/.
Commands
Run these from the repository root.
task test # Run go test -race ./...
task test:race # Run race tests for core and lightweight utility packages
task lint # Run golangci-lint and tidy-lint
task golangci-lint # Run golangci-lint v2 only
task tidy-lint # Verify go.mod and go.sum stay tidy
task contractcheck # Run go test -tags=contractcheck ./types
task docs:integrity # Run public documentation stale-claim checks
task bench:smoke # Compile and smoke-run benchmarks with tiny benchtime
task fmt # Run golangci-lint fmt ./...
task vet # Run go vet ./...
task vuln # Run govulncheck ./...
task verify:ci # Run lint, contractcheck, docs, race tests, benchmark smoke, and vuln
task verify # Run deps, fmt, vet, lint, contracts, docs, tests, benchmark smoke, and vuln
go build ./... # Verify all packages compile
Architecture
gozod/
├── constructors_*.go # Root facade constructor functions
├── core.go # Root aliases for shared contracts
├── errors.go # Root error presentation functions and sentinels
├── jsonschema.go # Root JSON Schema conversion functions and protocol aliases
├── metadata.go # Root registry and metadata aliases
├── structs.go # Root FromStruct helpers
├── cmd/gozodgen/ # Code generator for struct-tag schemas
├── coerce/ # z.coerce-style constructors for automatic input conversion
├── core/ # Public contracts, config, issue codes, shared types
├── docs/ # User documentation
├── examples/ # Runnable examples
├── internal/ # Engine, checks, issues, and runtime helpers
├── jsonschema/ # To/From JSON Schema conversion
├── locales/ # Localized validation messages
├── pkg/ # Shared helpers for clone, coercion, maps, regex, reflection, tags, transforms
├── types/ # Concrete schema implementations and fluent APIs
├── .agents/rules/ # Project rules for schemas, checks, naming, tests, performance, and structure
└── .agents/skills/ # Local agent skills available in this repository
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.
- 2mo ago First seen · 215 lines · 3,776 tokens per session scan A 004bbc09035f
gozod CLAUDE.md is an instructions file published in the GitHub repository kaptinlin/gozod (25 stars, last pushed 3mo ago), licensed MIT. It adds 3,776 tokens to every session, about $0.0151 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.
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