Borrowing it
Nothing to install: this file belongs to yahor-punko/mavericks-os. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/yahor-punko/mavericks-os/main/.claude/skills/session-start/SKILL.mdgit clone --depth 1 https://github.com/yahor-punko/mavericks-osWrote 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/yahor-punko/mavericks-os/session-start)<a href="https://agentmods.dev/skills/yahor-punko/mavericks-os/session-start"><img src="https://agentmods.dev/badge/skills/yahor-punko/mavericks-os/session-start.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 | $0.00088 | $0.01820 |
| Opus 5 | $0.00044 | $0.00910 |
| Sonnet 5 | $0.00018 | $0.00364 |
| Haiku 4.5 | $0.00009 | $0.00182 |
Grade B, and why
session-start scanned grade B with 1 finding 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 4d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- `permission_mode_conflict` — present only when a readable user-global `~/.claude/settings.json` `defaultMode` differs from the project-file resolution; shape `{project, user_global}`, a fact report only — never render The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 4d ago Changed · +14 lines 802ce4cb1f30
- 8d ago First seen · 147 lines · 88 tokens per session scan B 9e1f17eccb0a
session-start is a skill published in the GitHub repository yahor-punko/mavericks-os (3 stars, last pushed 5d ago), with no licence file. It adds 88 tokens to every session and 1,820 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
goga-cookbook
Principles for applying DSL specification in cell and CODEMANIFEST design.
goga-plan-by-design
Compile a design document into a ralphex execution plan.
goga-review-plan
Verify execution plan completeness and correctness.
goga-brainstorm
Pipeline orchestrator for brainstorming the cells architecture.
goga-define-challenge
Challenge the complete product definition before the PRD is generated.
goga-define-experience
Define the user experience required to achieve the established product goals and solve the identified problem.