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 lhhiep2204/apple-agent-builder-kit --skill agent-buildergit clone --depth 1 https://github.com/lhhiep2204/apple-agent-builder-kitWrote 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/lhhiep2204/apple-agent-builder-kit/agent-builder)<a href="https://agentmods.dev/skills/lhhiep2204/apple-agent-builder-kit/agent-builder"><img src="https://agentmods.dev/badge/skills/lhhiep2204/apple-agent-builder-kit/agent-builder.svg" alt="Measured on agentmods" 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 | $0.00040 | $0.08405 |
| Opus 5 | $0.00020 | $0.04202 |
| Sonnet 5 | $0.00008 | $0.01681 |
| Haiku 4.5 | $0.00004 | $0.00840 |
Grade A, and why
agent-builder 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 7d 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 — 582 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Builder
Consumers:
Agent Builderin.github/agents/agent-builder.agent.md(conductor)Apple Agent Generatorin.github/agents/apple-agent-generator.agent.md(artifact requirements, bundle shapes)Apple Quality Auditorin.github/agents/apple-quality-auditor.agent.md(audit standard, minimums)Apple Codebase Analyzerin.github/agents/apple-codebase-analyzer.agent.md(analysis template, workflow signals).github/instructions/agent-builder.instructions.md(generation quality standards, file editing rules)
Use this skill to design and generate high-quality Copilot customization bundles for Apple platform projects. This is the single source of truth for the complete kit workflow, bundle shapes, and artifact behavioral requirements.
Section Index
| Section | What it covers |
|---|---|
| Use Cases | When to invoke this skill |
| Apple Scope | Platforms, fallback defaults, alignment rule |
| Operating Modes / Three Operating Flows | Discovery vs Fast, Greenfield vs Verify vs Extend |
| Default Behavior | Generation defaults, tool restrictions, alignment |
| Single-Session Completion Rule | Never abandon mid-workflow, vscode_askQuestions |
| Workflow | 6-phase standard flow, kit reference files, community skill discovery |
| Bundle Shapes | Single / Focused / Full Kit minimums |
| Artifact Requirements | Per-primitive rules: Agent, Skill, Instruction, Prompt, Hook, YAML Frontmatter |
| Generation Principles | 8 non-negotiable rules for every generated agent |
| Harness Engineering Alignment | Feedforward/feedback, control types, key patterns |
| Large Task Execution Pattern | Decomposition, chunked execution, persistence |
| Context Optimization Rules | Three-layer model, signal-to-noise, context budget |
| Bundle Evolution Guidance | Maintenance triggers table for generated project context instruction |
| Constitution Pattern | Structure, generation rules, Phase -1 gates |
| Spec-Driven Pipeline | 4-stage pipeline, templates, activation criteria |
| Separated Review Pipeline | 4-agent review, short-circuit, evidence standard |
| Handoffs Pattern | Frontmatter format, delegation rules |
| Evidence Standard | Labels, enforcement, flow |
| Bundle Evolution and Drift Detection | Ref to Bundle Evolution Guidance (same content) |
| Review Memory Promotion | Recurring findings → durable rules |
| Hooks Generation | Auto-format, lint, compile hooks |
| Generated File Marking | Marker placement rules |
| Cross-Session Persistence | Repo memory, session memory, progress format |
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.
- 7d ago First seen · 582 lines · 40 tokens per session scan A 7e14f13df42b
agent-builder is a skill published in the GitHub repository lhhiep2204/apple-agent-builder-kit (6 stars, last pushed 4mo ago), licensed MIT. It adds 40 tokens to every session and 8,405 once invoked, about $0.0002 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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