Wiki Digest — Knowledge Newsletter Generator

You are generating a human-readable digest of recent wiki activity: what was learned, what was updated, what themes are emerging, and what's worth reviewing. This skill summarizes knowledge, not sources — think of it as a weekly review session, not an ingestion status report.

Before You Start

1. Resolve config — follow the Config Resolution Protocol in llm-wiki/SKILL.md (walk up CWD for .env → ~/.obsidian-wiki/config → prompt setup). This gives OBSIDIAN_VAULT_PATH and OBSIDIAN_LINK_FORMAT.
2. Parse the period from the user's request:
   • "daily" / "today" / "yesterday" → last 24 hours
   • "weekly" / "this week" / no argument (default) → last 7 days
   • "monthly" / "this month" → last 30 days
   • ISO date like "since 2026-05-01" → pages updated since that date
   • Explicit number like "last 14 days" → that many days
3. Read $OBSIDIAN_VAULT_PATH/log.md — last 200 lines — for entries within the period (timestamps are ISO-8601 prefixed lines).
4. Read $OBSIDIAN_VAULT_PATH/hot.md for current session context.
5. If $OBSIDIAN_VAULT_PATH/_insights.md exists, read its Anchor Pages table — you'll use it later to identify which new pages became hubs.

Step 1: Collect Pages Active in the Period

Glob all .md files under $OBSIDIAN_VAULT_PATH. Skip special/system files:

• index.md, log.md, hot.md, AGENTS.md, _insights.md
• Anything under _meta/, _archives/, _raw/
• Journal digest pages themselves (journal/digest-*.md)

For each remaining page, read its frontmatter:

• created — when the page was first written
• updated — when it was last modified

Classify:

• New pages: created is within the period
• Updated pages: updated is within the period but created is before it
• Unchanged: neither date falls in the period → skip

If fewer than 5 pages were active, note it and offer to widen: "Only 3 pages were active in the last 7 days — want a monthly digest instead?" Stop here unless the user says to continue.

For each active page, collect: title, category, tags, summary (frontmatter field), lifecycle, any ^[ambiguous] or ^[inferred] markers in the body.

Step 2: Identify Themes

From all active pages' tags, tally theme frequency:

For each tag across new + updated pages:
  count how many active pages carry it
Sort descending, take top 5

Also read $OBSIDIAN_VAULT_PATH/_meta/taxonomy.md (if it exists). Flag any tag from step 1 that does not appear in the taxonomy — these are new vocabulary words that emerged this period.

Note which categories grew most (concepts/, entities/, skills/, synthesis/, references/, etc.).

Step 3: Find Notable New Connections

Scan new and updated pages for cross-category wikilinks — links that bridge different knowledge layers. These are the most intellectually interesting outputs of the period.

For each active page, extract all [[wikilink]] targets. Classify each link by the target's category prefix. Flag links that cross categories (e.g., a concepts/ page linking to an entities/ page, or a synthesis/ page bridging two topics).

Rank candidates by interestingness:

• +3 if the link is across two categories that rarely connect (use _insights.md bridge data if available)
• +2 if the target page is a top-10 hub (per _insights.md anchors)
• +2 if the link appears in a synthesis/ page (deliberate cross-cutting)
• +1 if the source page is marked ^[inferred] (synthesized connection, not directly stated)

Take the top 3–5 connections. Write each as a plain-English sentence: not just "A → B" but why the connection is interesting.

Step 4: Surface Open Threads

Scan active pages and _raw/ for unresolved work:

• Drafts: pages with lifecycle: draft or lifecycle: stub
• Ambiguous claims: count ^[ambiguous] markers across all active pages (don't list every one — just the count and which pages have the most)
• Unstaged notes: count files in $OBSIDIAN_VAULT_PATH/_raw/ (anything here hasn't been promoted)
• Taxonomy gaps: tags from Step 2 that aren't in _meta/taxonomy.md

Step 5: Choose Recommended Re-reads

From the existing (pre-period) pages, identify 2–3 worth revisiting given this week's new context.

Heuristic: find pre-period pages that share the most tags with the active pages from Step 1. These are foundational pages whose topic was extended this period — the new pages build on them but the user may not have revisited the foundation.

Also include any pre-period page that now has 2+ new incoming links from active pages (it just became more connected — a sign it's load-bearing).

Write each recommendation with a concrete reason: "[[concepts/attention-mechanism]] — your foundational page; three new papers ingested this week all extend it", not just the page title.

Step 6: Generate the Digest

Produce a structured, scannable markdown report. The Headlines section is the most important — it should feel like the opening of a good newsletter, synthesizing actual insight rather than listing page names.

Apply the link format from llm-wiki/SKILL.md (Link Format section) using OBSIDIAN_LINK_FORMAT. Default is [[wikilink]].

# Wiki Digest — [Period Label]
> [N new pages · M updated pages · period: YYYY-MM-DD to YYYY-MM-DD]

## Headlines

- [Concrete insight #1 — synthesize the actual knowledge, not just "learned about X"]
- [Concrete insight #2]
- [Concrete insight #3]

## New Knowledge

### New pages ([count])
| Page | Category | Summary |
|---|---|---|
| [[concepts/foo]] | concept | One-sentence summary from frontmatter |
| [[entities/bar]] | entity | One-sentence summary |

### Notable updates ([count])
| Page | What changed |
|---|---|
| [[skills/react-hooks]] | Added patterns for useCallback with async effects |

*(If no updates, omit this subsection.)*

## Emerging Themes

- **#[tag]** ([N pages]) — [One sentence on why this topic was active]
- **#[tag]** ([N pages]) — [...]
- **#[NEW TAG]** ([N pages]) ⭐ *New vocabulary — not yet in taxonomy*

Most active category: **[category/]** ([N pages added or updated])

## Key Connections Made

- [[concepts/A]] → [[entities/B]] — [Plain-English reason this connection is interesting]
- [[synthesis/X]] created — bridges [[concepts/Y]] and [[concepts/Z]] for the first time
- *(up to 5 connections)*

## Open Threads

- **Drafts to compile** ([count]): [[concepts/foo]], [[concepts/bar]] — still in draft lifecycle
- **Ambiguous claims**: [N] `^[ambiguous]` markers across [M] pages — run `/wiki-synthesize` to resolve
- **Unstaged notes**: [N] files in `_raw/` — run `/wiki-ingest _raw/` to promote them
- **Taxonomy gaps**: Tags `#newtag1`, `#newtag2` used but not in taxonomy — run `/tag-taxonomy`

*(Omit any subsection where count is 0.)*

## Recommended Re-reads

- [[concepts/X]] — [Specific reason: "3 new papers this week all extend this concept"]
- [[synthesis/Y]] — [Specific reason: "2 new pages created this week reference it"]
- [[skills/Z]] — [Specific reason: "now has 4 new incoming links — it's become a hub"]

---
*Generated by wiki-digest · [TIMESTAMP] · [N pages scanned in [VAULT_PATH]]*

Visibility: If a page is tagged visibility/pii, exclude it from all tables and connection lists (but count it in the totals, noted as "+ N private"). If the user explicitly says "include private pages" or "full digest", include them normally.

Step 7: Output & Optionally Save

Default (chat output): Print the digest directly. At the end, ask: "Want me to save this as journal/digest-YYYY-MM-DD.md?"

If user prefixed with "save" or "write" (e.g., /wiki-digest save or "generate and save my weekly digest"):

• Write to $OBSIDIAN_VAULT_PATH/journal/digest-YYYY-MM-DD.md (weekly/monthly) or journal/digest-YYYY-MM-DD-daily.md (daily)
• Add frontmatter:

  ---
  title: "Wiki Digest — [Period Label]"
  category: journal
  tags: [digest, meta/review]
  sources: []
  created: TIMESTAMP
  updated: TIMESTAMP
  summary: "Weekly knowledge digest: [N new, M updated pages]. Top themes: [tag1], [tag2]."
  ---

• Update index.md with the new entry under Journal
• Do not add to .manifest.json (digests aren't source ingestions)

Either way, append to log.md:

- [TIMESTAMP] DIGEST period="7d" new_pages=N updated_pages=M themes=T connections=C saved=false

Edge Cases

Situation	Handling
Fewer than 5 active pages	Offer to widen the period; proceed only if user confirms
Empty vault (no pages at all)	Tell the user to run an ingest first; stop
No _meta/taxonomy.md	Skip taxonomy gap check; omit that line from Open Threads
No _insights.md	Skip hub-based scoring in Step 3; still produce connections section
All pages are visibility/pii	Report "N private pages active this period" with no details; offer full mode
Period spans a wiki rebuild	Note it in the digest: "Wiki was rebuilt during this period — page dates reflect post-rebuild state"

Notes

• Headlines are the payoff. Don't list page titles — synthesize the actual learning. If someone learned about attention mechanisms this week, the headline should capture the insight, not just say "added 3 transformer pages".
• Be concrete about re-reads. "This page is relevant" is useless. "3 of this week's papers all cite the same claim in this page" is actionable.
• This skill only reads. The only writes are the optional journal page, and the log.md append. It does not modify existing wiki pages.
• Don't duplicate wiki-status. If the user asks "what needs ingesting" or "what's the delta", route to wiki-status. This skill answers "what did I learn", not "what's pending".