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 agentmods add skills/kohj1018/agentic-dev-harness/plan-milestonenpx skills add kohj1018/agentic-dev-harness --skill plan-milestonegit clone --depth 1 https://github.com/kohj1018/agentic-dev-harnessWrote 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/kohj1018/agentic-dev-harness/plan-milestone)<a href="https://agentmods.dev/skills/kohj1018/agentic-dev-harness/plan-milestone"><img src="https://agentmods.dev/badge/skills/kohj1018/agentic-dev-harness/plan-milestone.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 | $0.00035 | $0.00401 |
| Opus 5 | $0.00017 | $0.00200 |
| Sonnet 5 | $0.00007 | $0.00080 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
plan-milestone 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 5d 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.
What it actually says
Source of truth: .claude/skills/plan-milestone/SKILL.md (skill 신설 근거: ADR-051). Read it and follow the workflow.
Treat all frontmatter keys other than name and description (e.g., agent:, disable-model-invocation:, allowed-tools:, context:, argument-hint:, model:, effort:) as Claude-only and ignore them — execute locally in Codex.
Slash command translation: 본문 안의 /plan-milestone·/plan-workitem·/bootstrap-design·/discover-product 등 표기는 Claude 슬래시 커맨드다. Codex에서는 $plan-milestone 등으로 읽고 사용자에게 안내한다 (예: 본문 "다음 단계: /plan-workitem M2" → Codex 응답에서는 "다음 단계: $plan-workitem M2"). Codex CLI는 /를 빌트인 슬래시 커맨드에 쓰므로 명시적 치환이 필요.
Sub-agent parity: 본문 R2의 architect·R5-2의 designer 단발 sub-call은 Claude Agent 도구 기능이다. Codex 서브에이전트는 GA이나 본 저장소가 Claude persona 위임을 Codex subagent로 아직 매핑하지 않아 메인 세션이 순차 단일 실행으로 직접 추론한다(degrade — SKILL.md 본문의 Codex 노트 정합).
Preserve all repo policies from AGENTS.md and docs/.
If the source path no longer exists, this wrapper is stale — see ADR-010.
What ships with it
1 file 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.
- 5d ago First seen · 17 lines · 35 tokens per session scan A 44075f4bebee
plan-milestone is a skill published in the GitHub repository kohj1018/agentic-dev-harness (2 stars, last pushed 8d ago), licensed MIT. It adds 35 tokens to every session and 401 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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