What is Implement Feature?

An end-to-end feature workflow guides coding work from reading the specification through planning, editing files, adding tests, and verifying the result. Tests are checks that confirm the code behaves as expected.

It helps implement specified features, plan the required changes, write supporting tests, and check that the completed work meets the specification.

It gives feature work a consistent sequence so important activities such as tests and verification are less likely to be skipped.

Implement Feature — Skill by CIrcui-try

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/circui-try/circuit/implement-feature

Any agent

npx skills add CIrcui-try/Circuit --skill implement-feature

Clone the repo

git clone --depth 1 https://github.com/CIrcui-try/Circuit

Made for: Claude Code, Codex.

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 56 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.

Model	Per session	Once invoked
Fable 5	$0.00016	$0.00056
Opus 5	$0.00008	$0.00028
Sonnet 5	$0.00003	$0.00011
Haiku 4.5	$0.00002	$0.00006

Measured yesterday against content hash 1345c4145fdc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Implement Feature 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.

fixtures/repos/sample-repo/.claude/skills/implement-feature/SKILL.md · 15 lines

What it actually says