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/fuyuxiang/echo-agent/note-takingnpx skills add fuyuxiang/echo-agent --skill note-takinggit clone --depth 1 https://github.com/fuyuxiang/echo-agentWhat 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 | $0.00025 | $0.00397 |
| Opus 5 | $0.00013 | $0.00198 |
| Sonnet 5 | $0.00005 | $0.00079 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
note-taking 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 2d 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.
What it actually says
Note Taking
Local Markdown knowledge base stored in ~/.echo-agent/notes/.
Operations
| Action | Command |
|---|---|
| Create | python3 scripts/notes_manager.py create "Title" --content "..." |
| Search | python3 scripts/notes_manager.py search "keyword" |
| List | python3 scripts/notes_manager.py list |
| Today | python3 scripts/notes_manager.py daily |
| Tags | python3 scripts/notes_manager.py tags |
| Links | python3 scripts/notes_manager.py backlinks "note-name" |
Note Format
Notes use YAML frontmatter:
---
title: My Note
tags: [project, idea]
created: 2026-06-13
---
# My Note
Content here. Link to [[other-note]] using wiki-links.
Features
- Wiki-links: Use
[[note-title]]to link between notes - Tags: YAML frontmatter tags for categorization
- Daily notes: Auto-created
YYYY-MM-DD.mdjournal entries - Full-text search: Grep-based search across all notes
- Backlinks: Discover which notes link to a given note
Storage
~/.echo-agent/notes/
├── daily/
│ ├── 2026-06-13.md
│ └── 2026-06-12.md
├── projects/
│ └── echo-agent.md
└── ideas/
└── new-feature.md
What ships with it
1 file 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.
- 2d ago First seen · 61 lines · 25 tokens per session scan A d83b9c087ecf
note-taking is a skill published in the GitHub repository fuyuxiang/echo-agent (988 stars, last pushed 2d ago), licensed MIT. It adds 25 tokens to every session and 397 once invoked, about $0.0001 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 2026-08-30.
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