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 agents/khef-labs/khef-mac/session-historiangit clone --depth 1 https://github.com/khef-labs/khef-macWrote 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/agents/khef-labs/khef-mac/session-historian)<a href="https://agentmods.dev/agents/khef-labs/khef-mac/session-historian"><img src="https://agentmods.dev/badge/agents/khef-labs/khef-mac/session-historian.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 | $0.00000 | $0.02609 |
| Opus 5 | $0.00000 | $0.01305 |
| Sonnet 5 | $0.00000 | $0.00522 |
| Haiku 4.5 | $0.00000 | $0.00261 |
Grade A, and why
session-historian scanned grade A 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 5d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
1. **You NEVER apply changes to the live snapshot.** You never call `PATCH /api/sessions/:id/summary`, never run a curl that writes, never mutate the session summary in the database. Archiving and drafting only. The call 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.
- 5d ago First seen · 157 lines · 0 tokens per session scan A 31d50fb93607
session-historian is an agent published in the GitHub repository khef-labs/khef-mac (2 stars, last pushed 17d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 2,609 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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