trilium

trilium is a skill for Claude Code, Codex from Transmitt0r/mycelium. It costs 46 tokens per session (972 once invoked), scanned A, original, MIT.

A set of tools for searching, reading, and lightly organizing notes in Trilium, a note-taking and knowledge-management application.

In plain words
What is it for?
Searching note content, reading individual notes, checking journal or calendar notes, adding labels or links, moving notes, managing attachments, and viewing changes or revisions.
Why use it?
It helps find relevant notes when simple keyword search is not enough and provides ways to inspect or update the notes found.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Searching note content, reading individual notes, checking journal or calendar notes, adding labels or links, moving notes, managing attachments, and viewing changes or revisions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/transmitt0r/mycelium/trilium
Install

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.

Any agent
npx skills add Transmitt0r/mycelium --skill trilium
Clone the repo
git clone --depth 1 https://github.com/Transmitt0r/mycelium

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for trilium

README.md
[![agentmods](https://agentmods.dev/badge/skills/transmitt0r/mycelium/trilium/github.svg)](https://agentmods.dev/skills/transmitt0r/mycelium/trilium)
Your own site
<a href="https://agentmods.dev/skills/transmitt0r/mycelium/trilium"><img src="https://agentmods.dev/badge/skills/transmitt0r/mycelium/trilium/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.

agentmods 80×15 button for trilium

Your own site · 80×15
<a href="https://agentmods.dev/skills/transmitt0r/mycelium/trilium"><img src="https://agentmods.dev/badge/skills/transmitt0r/mycelium/trilium.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 972 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.00972
Opus 5 $0.00023 $0.00486
Sonnet 5 $0.00009 $0.00194
Haiku 4.5 $0.00005 $0.00097

Measured 9d ago against content hash 83a933f30928, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

trilium 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 9d 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.

apps/trilium/skills/trilium/SKILL.md · 63 lines

How it starts

The opening of the file, as written. The whole thing — 63 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Trilium Notes

Tools: trilium_search_notes, trilium_get_note, trilium_read_note_content, trilium_create_note, trilium_update_note, trilium_delete_note, trilium_undelete_note, trilium_get_calendar_note, trilium_get_recent_changes, trilium_create_attribute, trilium_update_attribute, trilium_delete_attribute, trilium_place_note_in_tree, trilium_remove_note_from_location, trilium_create_attachment, trilium_get_attachment, trilium_update_attachment, trilium_delete_attachment, trilium_create_revision, trilium_read_revision_content

Facts:

  • trilium_search_notes: never returns full content. A result only gets a content_snippet when the semantic layer also matched it (Trilium's own search API has no excerpt of its own) -- otherwise read the note directly to see why it matched.
  • search = Trilium's query language: free text plus #label, ~relation, note.property filters, AND/OR/NOT, comparisons. Also hybrid lexical+semantic automatically.
  • Every result carries a url -- always surface it, never omit.
  • "today's note" / "this week's journal" / inbox → trilium_get_calendar_note, not trilium_search_notes.
  • Content format for text-type notes is Markdown, always, with no escape hatch -- write content in trilium_create_note/trilium_update_note as Markdown (# heading, **bold**, - list, [text](url)); it's converted to Trilium's native HTML for you, and trilium_read_note_content converts the stored HTML back to Markdown by default, so a note you read can be edited and written straight back with the same syntax. Never hand-author literal HTML tags for ordinary prose -- there is no way to write raw HTML verbatim. This does not apply to code-type notes (or any other non-text type): their content is raw source, always written and read byte-for-byte, no conversion involved.
  • trilium_update_note's content_mode: "edit" applies one or more targeted find-and-replace edits (edits) instead of resending the whole body -- much cheaper for a small change to a large note. Only works on non-text notes (code, etc.); for text notes use content_mode: "replace" or "append" instead.

Read the full file on GitHub · 63 lines

Changes

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.

  1. 9d ago First seen · 63 lines · 46 tokens per session scan A 83a933f30928

Subscribe to this mod's changes

trilium is a skill published in the GitHub repository Transmitt0r/mycelium (1 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 972 once invoked, about $0.0002 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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