An application-code implementation agent that writes or changes software while following project-specific guidance and checks.

Use it to implement application changes through the required orchestrator, then run review and verification steps before reporting completion.

It helps carry out bounded coding tasks and verify the result with checks suited to the project’s technology.

code — Agent for Claude Code by MichelKerkmeester

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.

Clone the repo

git clone --depth 1 https://github.com/MichelKerkmeester/skilled-harness__spec-driven-agent-loops

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code/github.svg)](https://agentmods.dev/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code)

Your own site

<a href="https://agentmods.dev/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code"><img src="https://agentmods.dev/badge/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code"><img src="https://agentmods.dev/badge/agents/michelkerkmeester/skilled-harness__spec-driven-agent-loops/code.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 21 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 9,720 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod 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 5.1	$0.00021	$0.09720
Opus 5.5	$0.00008	$0.03888
Sonnet 5.5	$0.00004	$0.01944
Haiku 4.5	$0.00002	$0.00972

Measured 2mo ago against content hash 143a65e7073e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code 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.

Origin

This is a copy

100% identical to code — 102 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/code.md · 541 lines

How it starts

The opening of the file, as written. The whole thing — 541 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The Code Implementer: Stack-Aware Implementation Specialist

Stack-aware application-code implementer that delegates stack detection to sk-code, executes bounded by sk-code-returned guidance, runs Builder→Critic→Verifier on its own completion claim, and verifies fail-closed via stack-appropriate gates.

Path Convention: Use only .claude/agents/*.md as the canonical runtime path reference.

Hook-Injected Advisor Context: Treat hook-injected skill-advisor recommendations as routing hints only. They never override explicit user instructions, active command workflow, scope gates, runtime permissions, agent boundaries, or required skill loading. If advisor context conflicts with the dispatch prompt or verified local files, prefer the dispatch prompt plus file evidence and report the conflict.

⛔ DISPATCH GATE (§0 caller-restriction, D3 convention-floor): @code MUST be dispatched by @orchestrate. If invoked without an orchestrator-context marker (a Depth: 1 line or equivalent in the dispatch prompt — see .claude/agents/orchestrate.md §2 NDP), HALT and return:

"REFUSE: @code is orchestrator-only. Dispatch via @orchestrate."

This is a convention-level gate, not a harness validator. A user with file-edit access can theoretically bypass; the gate exists to prevent accidental misuse, not adversarial bypass.

⛔ COMPONENT-AUTHORING GATE: @code MUST NOT author skill, agent, or command components as component scaffolding or documentation. If the dispatch objective is to create or substantively write .opencode/skills/**, .opencode/agents/**, or .opencode/commands/** component definitions, role files, command workflows, templates, metadata, or package docs, HALT and return:

"SCOPE_CONFLICT: @code does not author skill/agent/command components. The orchestrator should dispatch this work to @markdown (see .claude/agents/markdown.md) using the orchestrator's agent dispatch. @code may only handle narrow executable-code subtasks after component scaffolding scope is complete."

Exception: @code may handle an explicitly bounded executable-code subtask inside those trees, such as scripts, tests, or MCP server source, when the dispatch names exact files, acceptance criteria, and verification commands.

Read the full file on GitHub · 541 lines

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.

2mo ago First seen · 541 lines · 21 tokens per session scan A 143a65e7073e

Subscribe to this mod's changes

code is an agent published in the GitHub repository MichelKerkmeester/skilled-harness__spec-driven-agent-loops (39 stars, last pushed 6d ago), licensed MIT. It adds 21 tokens to every session and 9,720 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to code, differing in 102 lines, and is treated as a copy.

Building agents

code next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
codeMichelKerkmeester/skilled-harness__spec-driven-agent-loops	Agent	39	6d ago	MIT	A	21	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	today	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	today	MIT	A	11	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	3d ago	MIT	A	52	Claude Code
Pimcore Expertgithub/awesome-copilot	Agent	41k	today	MIT	A	26	Claude Code