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 skills add alexei-led/cc-thingz --skill writing-gogit clone --depth 1 https://github.com/alexei-led/cc-thingzWrote 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/alexei-led/cc-thingz/writing-go)<a href="https://agentmods.dev/skills/alexei-led/cc-thingz/writing-go"><img src="https://agentmods.dev/badge/skills/alexei-led/cc-thingz/writing-go/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/alexei-led/cc-thingz/writing-go"><img src="https://agentmods.dev/badge/skills/alexei-led/cc-thingz/writing-go.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 | $0.00071 | $0.00831 |
| Opus 5 | $0.00036 | $0.00415 |
| Sonnet 5 | $0.00014 | $0.00166 |
| Haiku 4.5 | $0.00007 | $0.00083 |
Grade A, and why
writing-go 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.
How it starts
The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Go Development
Use only for Go modules. Follow the module's target Go version.
Read First
Read principles.md before writing, changing, or reviewing Go code. Read conditional references only when the change touches that area.
Conditional References
- patterns.md — package layout, interfaces, errors, HTTP/service boundaries, concurrency, comments.
- testing.md — adding or reshaping Go tests; keep the local test loop fast.
- linting.md — changing lint config, lint commands, or slow lint workflows.
- cli.md — writing or changing Go CLIs.
Comments
- Use doc comments for exported declarations. Start with the identifier and end with a period.
- Comment non-trivial unexported declarations only when their contract is not obvious.
- Add implementation comments only for non-obvious constraints, invariants, side effects, tradeoffs, or tuning decisions.
- Keep comments short. Move longer rationale to docs, issue links, or design notes.
- Do not comment obvious code or restate names and types.
- Keep tests readable without comments; add one only for unobvious fixtures, timing, concurrency, or regression context.
Version-Gated APIs
- Confirm
go.mod,toolchain, CI, and nearby code before using version-specific APIs. - Go 1.25+: use
sync.WaitGroup.Gowhen no error propagation is needed. - Use existing
errgroupfor goroutine errors or shared cancellation; add it only when the dependency is justified. - Go 1.25+: use
testing/synctestfor deterministic concurrent tests when available. - Go 1.26+: prefer stdlib
crypto/hpkewhen HPKE is needed (release notes). - Go 1.26+: use
testing/cryptotest.SetGlobalRandomonly for deterministic crypto tests; it changes process-wide randomness and cannot run in parallel tests (release notes, API). - Treat
encoding/json/v2as experimental unless the project opts intoGOEXPERIMENT=jsonv2. - Go 1.26+: use
new(expr)only when clearer than a local variable, composite literal, or address expression. - Go 1.26+: keep recursive type constraints in generic libraries; keep business logic concrete.
What ships with it
6 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.
- yesterday Changed · +1 lines 276d74b50b16
- 10d ago First seen · 65 lines · 71 tokens per session scan A d6d608ac93cb
writing-go is a skill published in the GitHub repository alexei-led/cc-thingz (35 stars, last pushed yesterday), licensed MIT. It adds 71 tokens to every session and 831 once invoked, about $0.0004 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 2026-08-30.
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