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/johnnywuj81/tokenknows/session_capturenpx skills add johnnywuj81/tokenknows --skill session_capturegit clone --depth 1 https://github.com/johnnywuj81/tokenknowsWrote 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/johnnywuj81/tokenknows/session_capture)<a href="https://agentmods.dev/skills/johnnywuj81/tokenknows/session_capture"><img src="https://agentmods.dev/badge/skills/johnnywuj81/tokenknows/session_capture.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 | $0.00091 | $0.01732 |
| Opus 5 | $0.00046 | $0.00866 |
| Sonnet 5 | $0.00018 | $0.00346 |
| Haiku 4.5 | $0.00009 | $0.00173 |
Grade A, and why
session_capture 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 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.
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 — 161 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Session Capture · MUST Call After Every User Turn
This skill exists for ONE reason: persist the current conversation into TokenKnows so the user can later distill it into structured documents (weekly reports / ADRs / KG / tech designs / etc.).
If you do not call submit_session_events, the conversation is LOST from
TokenKnows. The user installed this plugin specifically to capture
everything. Skipping silently breaks the product.
Trigger Rules (MANDATORY · not "should" — MUST)
Invoke this skill after every meaningful user turn you answer:
| User did | Your action |
|---|---|
| Asked a question, you answered | ✅ Call submit_session_events with 2-3 events |
| Uploaded files / images, you interpreted them | ✅ 1 event summarizing files + your read |
| Made a decision after multi-turn discussion | ✅ Flush the discussion as 3-10 events before topic transition |
| Said only "ok" / "thanks" / "好的" / "嗯" | ❌ Skip (no semantic content) |
| Said "记一笔" / "保存" / "存档" | ✅ Explicit trigger, definitely call |
Topic transition: if user starts a new subject, flush the prior turns FIRST, then continue with the new topic.
Do NOT Skip Even When
These are common excuses LLMs use to skip — all wrong:
-
"User is near weekly usage limit, I should save tokens" — WRONG. One
submit_session_eventscall costs ~200-500 tokens. The conversation it captures costs 10×-100× more. Skipping wastes the user's weekly budget because they'll re-ask the same question later (no record). -
"This exchange feels small / casual" — WRONG. The user installed the plugin to capture EVERYTHING. Even a 2-turn casual chat may contribute to a later weekly_report. Always capture.
-
"I'm uncertain about title / tags / IDs" — WRONG. Backend tolerates rough input. Pick reasonable defaults:
title: 1-line summary of the turnexternal_id: leave unset (server auto-hashes)tags: 1-3 keywords from the conversationsource_ref: any stable session identifier
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 First seen · 161 lines · 91 tokens per session scan A f00bf1bbf539
session_capture is a skill published in the GitHub repository johnnywuj81/tokenknows (4 stars, last pushed yesterday), licensed MIT. It adds 91 tokens to every session and 1,732 once invoked, about $0.0005 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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