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 TimboGP/timbogp-marketplace --skill stop-sessiongit clone --depth 1 https://github.com/TimboGP/timbogp-marketplaceWrote 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/timbogp/timbogp-marketplace/stop-session)<a href="https://agentmods.dev/skills/timbogp/timbogp-marketplace/stop-session"><img src="https://agentmods.dev/badge/skills/timbogp/timbogp-marketplace/stop-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.
<a href="https://agentmods.dev/skills/timbogp/timbogp-marketplace/stop-session"><img src="https://agentmods.dev/badge/skills/timbogp/timbogp-marketplace/stop-session.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00142 | $0.01501 |
| Opus 5 | $0.00071 | $0.00750 |
| Sonnet 5 | $0.00028 | $0.00300 |
| Haiku 4.5 | $0.00014 | $0.00150 |
Grade A, and why
stop-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 11d 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 — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Stop a learning session
This skill closes a bracketed session: it records what happened in PROGRESS.md and gives the user a summary. It pairs with start-session.
When to use
The user explicitly signals the session is ending: "stop session", "let's wrap up for today", "end session", "we're done". For role-play sessions the signals also include "debrief" plus the flavor-specific signal per the active overlay — "end simulation" (speech-therapy), "end defense" (academic-research), "end review" (coding).
Do not invoke this skill proactively just because a conversation got long. The user brackets sessions explicitly; respect that.
What to update
Sub-project PROGRESS.md
Read and update .studyenv/<name>/PROGRESS.md (the sub-project the session ran in):
-
Topics table — for each topic touched this session, set the topic's status to the highest stage reached:
introduced— covered in theory this session (raise from blank)exercised— practiced via a practice session (raise fromintroduced)reviewed— exercise output / proofs / artifacts reviewed and pushed deeper (raise fromexercised)
A topic's status is the highest stage ever reached — never downgrade. If a topic was
exercisedand this session only touched theory on it, keepexercised. -
Status line — if the sub-project's overall status changed (e.g.
created→readyafter first materials added,ready→in progressafter first session), update it. Valid statuses:created,ready,in progress,blocked(with reason logged),stopped,finished. See../../reference/conventions.mdfor definitions. -
Journal — append an entry under today's date summarizing what happened: topics touched and at what new status, exercise outcomes, any notable misconceptions surfaced or breakthroughs, blockers if any.
Cross-project tracker (.studyenv/PROGRESS.md)
First read the sub-project AGENTS.md Tracking: field (../../reference/conventions.md → Tracking scope). If Tracking: local-only, skip this section entirely — the sub-project is self-tracked; do not mirror and do not warn about a missing cross-project tracker.
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.
- 11d ago First seen · 73 lines · 0 tokens per session scan A 95e0c8d6a087
stop-session is a skill published in the GitHub repository TimboGP/timbogp-marketplace (3 stars, last pushed 2mo ago), licensed MIT. It adds 142 tokens to every session and 1,501 once invoked, about $0.0007 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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