What is start-session?

A skill for running one of 13 numbered course sessions, from Session 0 through Session 12. A skill is a reusable instruction set for the coding agent.

Use it when the learner types /start-session or names a course session, such as Session 4.

It gives the learner a consistent way to start a specific lesson instead of explaining the session request each time.

How eugeniawang/claude-architect-exam-prep configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to eugeniawang/claude-architect-exam-prep. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/eugeniawang/claude-architect-exam-prep/main/.claude/skills/start-session/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/eugeniawang/claude-architect-exam-prep

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/skills/eugeniawang/claude-architect-exam-prep/start-session/github.svg)](https://agentmods.dev/skills/eugeniawang/claude-architect-exam-prep/start-session)

Your own site

<a href="https://agentmods.dev/skills/eugeniawang/claude-architect-exam-prep/start-session"><img src="https://agentmods.dev/badge/skills/eugeniawang/claude-architect-exam-prep/start-session/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/skills/eugeniawang/claude-architect-exam-prep/start-session"><img src="https://agentmods.dev/badge/skills/eugeniawang/claude-architect-exam-prep/start-session.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 539 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 unknown 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 5.1	$0.00035	$0.00539
Opus 5.5	$0.00014	$0.00216
Sonnet 5.5	$0.00007	$0.00108
Haiku 4.5	$0.00003	$0.00054

Measured 2mo ago against content hash 3eb84fa80911, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

start-session 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.

.claude/skills/start-session/SKILL.md · 43 lines

The source is not reproduced here

No licence file

Read it on GitHub

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 · 43 lines · 35 tokens per session scan A 3eb84fa80911

Subscribe to this mod's changes

start-session is a skill published in the GitHub repository eugeniawang/claude-architect-exam-prep (2 stars, last pushed 5mo ago), with no licence file. It adds 35 tokens to every session and 539 once invoked, about $0.0001 per session on Opus 5.5. 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.

Learning and teaching

start-session next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
start-sessioneugeniawang/claude-architect-exam-prep	Skill	2	5mo ago	none	A	35	Claude Code
hr-onboardingnexu-io/open-design	Skill	106k	yesterday	Apache-2.0	A	62	Claude Code, Codex
book-mirrorgarrytan/gbrain	Skill	32k	yesterday	MIT	A	138	Claude Code
exam-forecastanthropics/claude-for-legal	Skill	9.9k	3d ago	Apache-2.0	A	73	Claude Code
lean-formalizewanshuiyin/Auto-claude-code-research-in-sleep	Skill	19k	3d ago	MIT	A	81	Claude Code
eli5companion-inc/feynman	Skill	10k	6d ago	MIT	A	63	Claude Code, Codex
deck-course-modulenexu-io/html-anything	Skill	9.4k	25d ago	Apache-2.0	A	25	Claude Code, Codex

claude-architect-exam-prep: Skill for Claude Code