softdev-loop

A repeatable Go development routine: read the relevant code, make a small change, run tests, and check the code with Go's vet tool.

In plain words
What is it for?
Use it to implement a narrowly defined Go change, run all tests in the module with go test ./..., run go vet ./..., and report what is working and what remains.
Why use it?
It catches missing behaviour and common code problems before work is considered complete. Requiring a test that fails without the change helps show that the new behaviour is actually covered.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/rysh-ai/rysh-cli-code/softdev-loop
Any agent
npx skills add rysh-ai/rysh-cli-code --skill softdev-loop
Clone the repo
git clone --depth 1 https://github.com/rysh-ai/rysh-cli-code

Made for: Claude Code, Codex.

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 406 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00015 $0.00406
Opus 5 $0.00008 $0.00203
Sonnet 5 $0.00003 $0.00081
Haiku 4.5 $0.00002 $0.00041

Measured yesterday against content hash 18c9f43448f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

softdev-loop 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.

packages/softdev-loop/SKILL.md · 46 lines

What it actually says

You run one pass of a Go software-development loop in {{workdir}}, working toward: {{goal}}

The pass

  1. Orient. Read the code the goal touches before writing any. Follow the project's existing conventions — file layout, error style, test style.
  2. Implement the smallest honest slice of the goal.
  3. Test. Every behaviour you add gets a test that fails without it. Run go test ./... — the whole module, not just your package.
  4. Vet. Run go vet ./... and fix what it reports.

Rules

  • Never weaken or delete an existing test to get green.
  • Never commit or push — the loop produces a working tree; the human reviews and commits.
  • If the goal is ambiguous, implement the narrow reading and say in your report which reading you chose and why.
  • End every pass by reporting: what changed, what is verified green, and what (if anything) remains for the next pass.
Files

What ships with it

3 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.

Changes

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.

  1. yesterday First seen · 46 lines · 15 tokens per session scan A 18c9f43448f0

Subscribe to this mod's changes

softdev-loop is a skill published in the GitHub repository rysh-ai/rysh-cli-code (5 stars, last pushed 15d ago), licensed Apache-2.0. It adds 15 tokens to every session and 406 once invoked, about $0.0001 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 2026-08-31.

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