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 sxhmilyoyo/sundayhao-plugins --skill session-managergit clone --depth 1 https://github.com/sxhmilyoyo/sundayhao-pluginsWrote 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/sxhmilyoyo/sundayhao-plugins/session-manager)<a href="https://agentmods.dev/skills/sxhmilyoyo/sundayhao-plugins/session-manager"><img src="https://agentmods.dev/badge/skills/sxhmilyoyo/sundayhao-plugins/session-manager/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/sxhmilyoyo/sundayhao-plugins/session-manager"><img src="https://agentmods.dev/badge/skills/sxhmilyoyo/sundayhao-plugins/session-manager.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 | $0.00049 | $0.01099 |
| Opus 5.5 | $0.00020 | $0.00440 |
| Sonnet 5.5 | $0.00010 | $0.00220 |
| Haiku 4.5 | $0.00005 | $0.00110 |
Grade A, and why
session-manager 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 1mo 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 — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Session Manager
You own four properties on the current session's note: session_name, project, tags and
summary. Ownership reads by stage. The hooks seed a note when the session starts and never overwrite a
value that is already there. You are the only writer while the session runs. Once it has ended, the
recap writes the session's description — its project, tags and summary — from the whole
conversation, overwriting what is there, because by then it has more context than anyone had during the
session (ADR-0006).
Everything else on the note belongs to the hooks.
| Property | Type | Holds |
|---|---|---|
session_name |
text | The session's name, kept in step with /rename |
project |
text | The knowledge-bank domain the work belongs to, one of the vault's projects/ folders, empty when it belongs to none |
tags |
list | Categorization, drawn from the vault's existing tags |
summary |
text | One line on what the session accomplished |
project names a domain, never a repository or directory: those are tags. A value outside the domain
set is unresolved, which is what a note written before this rule holds, so treat it as empty and set it
properly rather than leaving it to be read as a domain.
Preflight
Run all five steps on every invocation, before the user's request and whatever they asked for.
1. Locate the note. The SessionStart hook injects a docs path into your system prompt:
Session docs path: {KB_PATH}/_sessions/2026-03-04/abc123-def456/docs/
Everything from _sessions/ onward is vault-relative. Drop the trailing docs/ and append
session.md, giving _sessions/2026-03-04/abc123-def456/session.md. Read it:
obsidian vault="knowledge-bank" read path="<vault-relative-path>"
If no docs path was injected, ask the user for the session folder.
2. Sync the name. /rename writes a customTitle to the transcript, which the note does not see:
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago Changed 411a6c4529d5
- 1mo ago Changed · +17 lines 9e1d58a38756
- 1mo ago Changed · -67 lines · -83 tokens per session 85df9493fffc
- 1mo ago Changed 29c743c8636f
- 1mo ago First seen · 161 lines · 132 tokens per session scan A ce9e2aaab25a
session-manager is a skill published in the GitHub repository sxhmilyoyo/sundayhao-plugins (8 stars, last pushed 2d ago), licensed Apache-2.0. It adds 49 tokens to every session and 1,099 once invoked, about $0.0002 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.
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