# this evening we created a diagrams skill using mermaid. I would like you to add to that skill tha... ## Retrieval Notes - Session id: `e2b92bdb-7b38-4f62-a574-3ab22fc81c20` - Last activity: `2026-02-12T22:41:53.826Z` - Files touched: `2` ## Artifacts **Modified:** - `/Users/nickyoung/.claude/skills/diagram/SKILL.md` - `/Users/nickyoung/.claude/skills/tag-conventions/SKILL.md` ## My Notes <!-- Add your notes here. This section is preserved across syncs. --> ## Conversation ### User this evening we created a diagrams skill using mermaid. I would like you to add to that skill that everytime a note has a diagram, either at creation or added later, it should have the hashtag #diagram. is the skill the right place for this information? are there more or better ### Assistant Let me think carefully about this question. Nick is asking about where to put a rule that notes containing Mermaid diagrams should be tagged with `#diagram`. He's wondering whether the diagram skill itself is the right place, or whether there are better or additional places. Let me start by understanding the current system architecture... First, I need to look at the diagram skill to understand what it currently does. And I should think about all the places where tagging behavior could be encoded in this system. Let me read the diagram skill first, and also think about the other places where tagging conventions live. The places where this kind of rule could live: 1. **The diagram skill itself** (`~/.claude/skills/diagram/SKILL.md`) — This is where diagram creation happens. If the skill creates a diagram in a note, it could enforce adding `#diagram` to frontmatter. 2. **The tag-conventions skill** (`~/.claude/skills/tag-conventions/SKILL.md`) — This is explicitly about which tags to use and when. A rule like "notes with diagrams get `#diagram`" is fundamentally a tagging convention. 3. **The smart-note skill** — Since smart-note is the primary note creation pathway, if a note is created *with* a diagram, smart-note would need to know about this tag. 4. **The obsidian-markdown skill** — This handles Obsidian-flavored markdown generally. 5. **CLAUDE.md itself** — Global behavioral rules. Now, let me think about the different scenarios: **Scenario A: Diagram is created at note creation time via `/smart-note`** - The smart-note skill creates the note with frontmatter tags - If the content includes a mermaid diagram, smart-note would need to know to add `#diagram` - But smart-note doesn't currently know about diagrams specifically - The diagram skill might be invoked to create the diagram, and then smart-note handles the note... or does the diagram skill create the note directly? **Scenario B: Diagram is added to an existing note via `/diagram`** - The diagram skill is invoked on an existing note - The skill would need to check whether `#diagram` is already in the frontmatter and add it if not - This is squarely within the diagram skill's responsibility **Scenario C: Someone manually adds a mermaid code block to a note** - No skill is invoked - Nothing would enforce the tag - This is an edge case — but it means the rule can't be *perfectly* enforced Hmm, so the question is really about separation of concerns vs. reliability. Let me think about this differently. What's the *nature* of the rule? The rule "notes with diagrams should have `#diagram`" is: - Partly a **tagging convention** (what tags mean and when they apply) - Partly a **behavioral instruction** for the diagram skill (what to do when you create/add a diagram) - Partly a general instruction for any skill that might create content with mermaid blocks Wait, I should actually read the current state of these skills before theorizing too much. Let me check what exists. Actually, I should think about this more carefully from a systems design perspective. The key insight is: there's a difference between **declaring** a convention and **enforcing** it. **Declaration** belongs in tag-conventions — "the tag `#diagram` is used for notes containing Mermaid diagrams." This is reference documentation. It tells Claude (and Nick) what the tag means. **Enforcement** belongs in the diagram skill — "when you create or add a diagram to a note, ensure `#diagram` is in the frontmatter tags." This is operational instruction. It tells Claude what to *do*. But wait — is there a third place? What about notes that come in through other channels? If Nick pastes a mermaid diagram into a note via smart-note, the smart-note skill would be the one creating the note. Does smart-note consult tag-conventions? It probably should, but the question is whether it *does*. Let me think about how these skills interact in practice... When `/diagram` is invoked: 1. The diagram skill loads 2. It creates a mermaid code block 3. It writes it into a note (new or existing) 4. At this point, it should add `#diagram` to frontmatter When `/smart-note` is invoked with content that includes a diagram: 1. The smart-note skill loads 2. It processes the content 3. It creates frontmatter with appropriate tags 4. If it recognizes a mermaid block in the content, it should add `#diagram` But here's the thing — does smart-note load the diagram skill? Probably not. Skills don't chain like that automatically. So smart-note would need its own awareness of the `#diagram` convention. This suggests the rule should live in **multiple places**, with different roles: 1. **tag-conventions**: Declare the convention (reference) 2. **diagram skill**: Enforce it when `/diagram` is invoked (primary enforcement) 3. Optionally: smart-note could be made aware too, but this adds complexity Actually, wait. Let me reconsider. How often does Nick create a diagram *through smart-note*? Probably rarely or never — diagrams are created through the diagram skill. Smart-note is for capturing thoughts, references, ideas. If a thought happens to include a mermaid diagram... that seems unusual. The typical flow would be: 1. Create a note (via smart-note or manually) 2. Later, add a diagram to it (via `/diagram`) Or: 1. `/diagram` creates a note with a diagram from scratch In both cases, the diagram skill is the entry point for diagram creation. So putting the enforcement there covers the main cases. Tag-conventions should still *declare* the tag so there's a single source of truth for what tags mean. Now, is there a *better* approach entirely? Let me think... One alternative: a **hook**. Could there be a PreToolUse or PostToolUse hook that checks for mermaid blocks and adds the tag? That would be truly universal enforcement. But that seems like overkill for this — it would fire on every tool use and check for mermaid blocks. Not worth the complexity. Another alternative: an Obsidian plugin or templater rule. But that's outside Claude's domain. Another thought: **CLAUDE.md** could have a general rule like "when adding mermaid diagrams to any note, ensure `#diagram` is in the frontmatter." This would apply regardless of which skill is active. It's a behavioral rule, not a skill-specific instruction. Hmm, but CLAUDE.md is already quite long, and Nick has expressed that he doesn't want it to become a dumping ground. The tag-conventions skill exists precisely to offload this kind of thing. Let me settle on a recommendation... I think the right answer is **two places**: 1. **diagram skill** — Add an operational instruction: "When creating or adding a diagram to a note, ensure `#diagram` is present in the frontmatter tags. If the note already has frontmatter, add the tag to the existing tags array. If not, create frontmatter with the tag." 2. **tag-conventions skill** — Add the declaration: "`#diagram` — notes containing Mermaid diagrams" This follows the pattern of separation between declaration and enforcement. The diagram skill handles the *doing*, tag-conventions handles the *knowing*. Is there a risk of the two getting out of sync? Slightly, but they serve different purposes and the diagram skill would be the one that actually performs the action. Tag-conventions is more of a reference that Claude consults when it needs to understand what tags are available. Actually, one more thing to consider: does the tag-conventions skill get loaded when the diagram skill runs? If not, the diagram skill needs to be self-contained in its instruction to add the tag. It can't rely on tag-conventions being loaded at the same time. Skills load independently based on user invocation. When Nick says `/diagram`, only the diagram skill loads. So yes — the diagram skill needs to contain the operational instruction directly, not just reference tag-conventions. This confirms: put the *action* in the diagram skill, put the *reference* in tag-conventions. Both places, different purposes. Let me also think about whether there's anything else worth considering here... What about **removing** the tag? If a diagram is deleted from a note, should `#diagram` be removed? That's a much harder problem and probably not worth automating. Nick can handle that manually if it ever matters. Let me not overcomplicate this. What about notes that embed diagrams from other notes using `![[diagram-note]]`? Should *those* get the `#diagram` tag? I'd say no — the tag should indicate the note *contains* a diagram, not that it *references* one. Keep it simple. OK, I think I've arrived at a clear recommendation. Let me also actually read the current diagram skill and tag-conventions to make sure my recommendation is concrete and actionable. The answer is **two places**, each serving a different purpose: **1. The diagram skill — for enforcement** This is where the operational instruction belongs: "when you create or add a diagram, ensure `#diagram` is in the frontmatter." The diagram skill is the entry point for diagram creation, so it's the natural place to enforce the tag. Since skills load independently (tag-conventions won't be loaded when `/diagram` runs), the instruction needs to be self-contained here. **2. The tag-conventions skill — for declaration** This is where the tag's *meaning* is documented: "`#diagram` — notes containing Mermaid diagrams." Tag-conventions is the reference Claude consults when it needs to know what tags are available and what they signify. Without this entry, Claude might not think to add `#diagram` when creating a note that happens to include a diagram through some other pathway. **Why not just one place?** - Diagram skill alone: Claude wouldn't know about the tag when working outside that skill (e.g., if you paste mermaid syntax into a `/smart-note`) - Tag-conventions alone: It's a reference document — it declares conventions but doesn't control what the diagram skill *does* at execution time - CLAUDE.md: Already dense; this is exactly the kind of rule that tag-conventions and skill-specific instructions were created to offload **Why not a hook?** A hook that scans every tool call for mermaid blocks would be universal enforcement, but it's disproportionate machinery for this. The diagram skill covers the primary creation pathway, and tag-conventions covers the awareness gap. Shall I go ahead and add the rule to both places? *Due posti per una regola sola: l'operazione nel diagramma, la dichiarazione nelle convenzioni.* ### User "Shall I go ahead and add the rule to both places?" please ### Assistant Let me read both skills first to understand their current state. ### Assistant Good, I can see both files clearly. Now let me add the rule to both places. ### Assistant Done. Two small, precise edits: 1. **Diagram skill** — Added step 5 to the workflow: *"Ensure `#diagram` is in the note's frontmatter tags (add if missing)"*. This sits right after writing the mermaid block and before opening the note, so it's part of the natural creation flow. 2. **Tag-conventions skill** — Added `#diagram` to the Domain Tags table: *"Notes containing Mermaid diagrams"*. Now it's declared alongside `#fitness`, `#fiction`, etc., so Claude knows about it even when the diagram skill isn't loaded. *Due incisioni chirurgiche — il bisturi preferito al martello.*