coach

coach is a skill for Claude Code from tpierrain/kenjaku. It costs 85 tokens per session (1,621 once invoked), scanned A, original, Apache-2.0.

A private self-coaching guide that acts as an honest but caring sparring partner for your decisions, plans, and reasoning.

In plain words
What is it for?
Use it to review a decision, challenge a plan, examine personal commitments, or prepare for a difficult situation using notes from your knowledge vault.
Why use it?
It helps expose weak logic, avoided issues, unrealistic plans, and blind spots when you need to think through something alone.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions subagents.

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/tpierrain/kenjaku/coach
Any agent
npx skills add tpierrain/kenjaku --skill coach
Clone the repo
git clone --depth 1 https://github.com/tpierrain/kenjaku

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.

agentmods badge for coach

README.md
[![agentmods](https://agentmods.dev/badge/skills/tpierrain/kenjaku/coach.svg)](https://agentmods.dev/skills/tpierrain/kenjaku/coach)
Your own site
<a href="https://agentmods.dev/skills/tpierrain/kenjaku/coach"><img src="https://agentmods.dev/badge/skills/tpierrain/kenjaku/coach.svg" alt="Measured on agentmods" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,621 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 5.1 $0.00085 $0.01621
Opus 5 $0.00043 $0.00811
Sonnet 5 $0.00017 $0.00324
Haiku 4.5 $0.00009 $0.00162

Measured 6d ago against content hash 3a1df7202920, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

coach 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 6d 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.

.claude/skills/coach/SKILL.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/coach — Sparring partner (self-coaching)

A "fierce" coach: brutally honest yet caring, wired into your second brain. It coaches only you — not others. Its job: sharpen your thinking, make your plans more realistic, make your blind spots visible.

When to use it

When you want to step back, get challenged on a decision / a plan, or think out loud with someone who won't let you off the hook. These roles — where your head is down in the weeds, where you sometimes feel alone — need it.

Step 1 — Preparation agent (DO NOT SKIP)

Launch a sub-agent with these exact instructions:

You are a preparation agent for a coaching session.
Your job: read the vault and produce a condensed brief of 30 lines max.

1. Read the files in vault/coaching/ (if any): commitments made, patterns identified, number of the last session.
2. Read vault/backlog/perso.md (the cache of your personal commitments/actions). Incorporate the open actions.
3. Read your recent notes (the 5 most recent from vault/daily/, vault/meetings/, vault/topics/ — last 7 days) to pick up weak signals.
4. Assess the MATURITY OF THE SUBSTRATE: count the REAL notes (ignore those tagged `exemple`/demo) and the time span covered (date of the oldest real note → today). Spot whether there is little material: first/second coaching session, only a handful of notes, or less than a week of real accumulated data.
5. Produce a structured brief (30 lines max):

COACHING BRIEF
==============
Previous session: [date, number, or "first session"]
Current commitments: [short list, status kept/not kept if verifiable]
Patterns already identified: [short list, or "none"]
Maturity of the substrate: [e.g. « YOUNG: 4 real notes over 2 days » | « OK: N notes over X weeks »]
---
Current situation: [5 lines max]
---
Recent weak signals: [5 lines max — what's hot, what's stuck, what has changed]
---
Topics to dig into: [3 leads max for the coach]

Do NO coaching, give NO opinion. You are a collection agent, not a coach.

Wait for the agent's return before step 2.

Read the full file on GitHub · 142 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.

  1. 6d ago First seen · 142 lines · 85 tokens per session scan A 3a1df7202920

Subscribe to this mod's changes

coach is a skill published in the GitHub repository tpierrain/kenjaku (80 stars, last pushed yesterday), licensed Apache-2.0. It adds 85 tokens to every session and 1,621 once invoked, about $0.0004 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 2026-08-30.

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