Cortex Skill

What It Does

Operate Cortex, the LifeOS memory system, from one skill. Two halves: the Knowledge Archive — a curated, typed graph of notes across six entity domains (People, Companies, Ideas, Research, Blogs, Books), every note shipping typed related: cross-links so the archive is a connected graph, not a pile of files — and recall — finding prior work (sessions, ISAs, conversations) by topic or date phrase. Operations cover search, add, harvest, develop, ingest, contradiction-finding, graph traversal, compressed retrieval, conversation mining, the weekly distill pass, and session recall.

The Problem

Notes you save in isolation are notes you never find again. A flat folder of facts has no way to tell you that two notes contradict each other, that a new source updates an old claim, or that an idea connects to a person and a company you wrote up months ago. Knowledge dies when it can't be retrieved or related. This archive forces every note into a typed schema with mandatory cross-links and ripples updates through related notes on ingest, so the connections are built in at write time instead of being reconstructed by hand later.

How It Works

Manage the LifeOS Knowledge Archive at ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/. Each operation routes through a subcommand below; notes follow the archive schema and ship with typed cross-links.

Archive schema: ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/_schema.md

Hard rule — never write KNOWLEDGE/ directly. All writes route through this skill (add, harvest, ingest, develop) — never cp, mv, Write, or Edit straight into the directory, even during migration or bulk import. The skill enforces typed frontmatter, mandatory cross-links, and domain classification; raw filesystem writes skip those guarantees and corrupt the graph silently (broken links don't fail loudly — they produce phantom entries retrieval misses). Migration tooling MUST call this skill per chunk, never shell out to cp. The one sanctioned exception is the Algorithm's LEARN phase, which writes to KNOWLEDGE/ directly because it holds the best context and applies the same schemas (see Gotchas).

Workflow Routing

Workflows are inline command sections in this file (no Workflows/ dir); each row routes to the matching H2 section below.

Trigger	Workflow	Action
/knowledge (no args)	status	Health dashboard
/knowledge <query>	search	Search for notes matching query
/knowledge search <query>	search	Explicit search
/knowledge add <type>	add	Create a new note (People, Companies, or Ideas)
/knowledge harvest	harvest	Run KnowledgeHarvester on all sources
/knowledge develop	develop	Surface seedlings and enrich them
/knowledge ingest <url-or-file>	ingest	Read source, create note, ripple updates to related notes
/knowledge contradictions	contradictions	Find and review conflicting claims across notes
/knowledge graph	graph	Knowledge graph stats and navigation
/knowledge graph <slug>	graph	Traverse graph from a note
/knowledge retrieve <query>	retrieve	Compressed context retrieval
/knowledge mine	mine	Mine recent conversations for memory candidates
/knowledge distill	distill	Weekly harvest of the archive into a routed, cited digest
/cortex recall <query> (also /cs)	recall	Find prior work — sessions, ISAs, conversations — by topic or date phrase

/cortex <args> and legacy /knowledge <args> route identically — the subcommand decides.

If $ARGUMENTS doesn't match a subcommand, treat it as a search query.

---

status (default, no args)

Run the harvester status command and display results:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeHarvester.ts status

Also show:

• Quick summary of domains with note counts
• Any orphan wikilinks
• Any stale seedlings
• Time since last harvest

Present in NATIVE mode.

---

search

Search the Knowledge Archive for notes matching $ARGUMENTS.

Step 1 — Lexical search:

rg -i "$ARGUMENTS" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l

Step 2 — Frontmatter search (tags and titles):

rg -i "title:.*$ARGUMENTS|tags:.*$ARGUMENTS" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l

Step 3 — Wikilink search:

rg "\[\[.*$ARGUMENTS.*\]\]" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l

Deduplicate results across all three. For each match, read the first 5 lines of frontmatter to show title, domain, status, tags.

Present results as a table:

| Note | Domain | Status | Tags | Relevance |

If no results found, say so and suggest checking the full MEMORY/ system or running a harvest.

---

add

Create a new note manually in the specified entity type.

1. Validate type is one of: People, Companies, Ideas, Research
2. Ask for a title (or use remaining args after type)
3. Generate kebab-case filename from title
4. MANDATORY: Find 2-3 related notes first. Before writing the new note, grep existing Knowledge for related entities by topic/tags/name. This becomes the related: frontmatter array. No Knowledge note ships without typed links. See Canonical Linking Requirement below.
5. Create the note with proper frontmatter from _schema.md — the validator (LIFEOS/TOOLS/KnowledgeSchema.ts ENVELOPE) requires all EIGHT of: id (mint via mintId(slug, created) — kb_ + 12 hex chars), type, title, tags (min 1), quality (0-10), created, updated, convention: kb-v3 — plus type-specific body sections. A note built from the old six-field list can never validate (public issue #1678, @christauff). Set created: and updated: to today's date from date +%Y-%m-%d — archive-entry dates, never a source's publication date (public PR #1604, @asdf8675309).
6. Write the file to KNOWLEDGE/<Type>/<kebab-case-title>.md — slug max 60 chars
7. Verify every slug in related: exists in the archive before saving
8. Regenerate the type's MOC:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeHarvester.ts index

Topic is a tag, not a type. A security insight is an Idea with a security tag. A security company is a Company with a security tag. The entity type determines the schema; the tag determines the topic.

Canonical Linking Requirement (MANDATORY)

Every new Knowledge note must ship with typed cross-links. This is not optional. The normative contract is _schema.md (regenerated by the schema tools): every note carries typed related: links naming the target note and the relationship type, so the archive is a graph, not a pile.

Every write must include:

1. related: frontmatter array — 2-4 typed entries linking to other Knowledge entries (any domain: People, Companies, Ideas, Research)
2. Body wikilinks — 1-3 [[slug]] references woven into the prose where natural (Implications, Evidence, or Context sections)

9 relationship types (pick the most accurate, prefer specific over generic):

Type	Meaning
related	Generic association (default only if no better fit)
supports	Provides evidence for the linked note
contradicts	Conflicts with the linked note
extends	Builds upon the linked note
part-of	Component of a larger whole
instance-of	Example of a pattern
caused-by	Result of the linked note
preceded-by	Came before temporally
derived-from	Distilled from the linked source note (e.g. blog → idea)

Frontmatter format:

related:
  - slug: other-note-slug
    type: extends
  - slug: another-note-slug
    type: supports

How to find related notes before writing:

# By topic/keyword
rg -l "TOPIC" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md

# By tag overlap
rg "^tags:.*TAG" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l

# For People/Companies — grep by name
rg -l "Person Name" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/

Enforcement:

• Writes that skip related: are incomplete and must be fixed before the skill/workflow returns success
• The ingest workflow runs this as part of the ripple pass
• The Algorithm LEARN phase includes this in its knowledge capture step
• All agents writing Knowledge entries must follow this rule — it is part of the schema, not an optional enhancement

---

harvest

Run the KnowledgeHarvester to pull new knowledge from all LifeOS sources:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeHarvester.ts harvest

Display results. If nothing was harvested, explain that sources are already up to date.

Optionally accept --source filter: /knowledge harvest work or /knowledge harvest memory.

---

develop

The weekly gardening workflow. Surface seedling notes that are ready for enrichment.

Step 1 — Find seedlings:

rg "^status: seedling" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l

Step 2 — For each seedling:

• Read the note
• Read related notes (follow wikilinks, search for same tags)
• Check if newer WORK/ ISAs or auto-memory entries have relevant context
• Enrich the note: add context, suggest wikilinks, flesh out content

Step 3 — Present the diff to the user for approval.

Step 4 — If approved:

• Write the updated note
• Promote status from seedling to budding (or evergreen if comprehensive)
• Update updated: to today's date from date +%Y-%m-%d; leave created: untouched
• Regenerate affected MOCs

If no seedlings exist, report archive is clean.

---

ingest

Ingest a source into the Knowledge Archive. This is the key Karpathy-inspired upgrade: reading a source doesn't just create one note — it ripples updates through existing related notes.

If no argument provided: Show usage: /knowledge ingest <url-or-file-path>

Step 1 — Fetch the source

• URL: Use WebFetch to retrieve and read the content. If WebFetch fails, try curl -sL via Bash.
• File path: Use Read tool to read the local file.

Summarize the source in 2-3 sentences. Identify key entities, claims, and insights.

Step 2 — Classify and create primary note

Determine entity type (People, Companies, Ideas, or Research) using the classification rules in _schema.md. Most ingested sources become Ideas.

Create the primary note using the schema for that type:

• Generate kebab-case slug from title (max 60 chars)
• Write to KNOWLEDGE/<Type>/<slug>.md with proper frontmatter
• Set created: and updated: to today's date from date +%Y-%m-%d — both record when the note entered the archive, not when the source was published. A stated publication date belongs in source_date:; never let it reach created:, and never guess a date the source does not state (public PR #1604, @asdf8675309)
• Include source_url: or source_path: in frontmatter
• MANDATORY: Include related: array with 2-4 typed links — the ripple pass (Step 3) identifies these, and they must be baked into the frontmatter of the primary note at creation time, not added after

Step 3 — Ripple pass (the key innovation)

Search for existing notes that relate to this new content:

# Search by extracted tags
rg -i "TAG1|TAG2|TAG3" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l --glob '!_*'

# Search by key entities/concepts mentioned
rg -i "ENTITY1|ENTITY2" ~/.claude/LIFEOS/MEMORY/KNOWLEDGE/ --type md -l --glob '!_*'

For each related note found (up to 10):

1. Read the note
2. Determine if the new source adds information, context, or contradicts existing claims
3. If yes, propose the specific update (add wikilink, add evidence, note contradiction)

Present the ripple plan to the user:

📥 INGEST RIPPLE PLAN:
  PRIMARY: Ideas/new-note-slug — "Title" (created)
  PRIMARY related: frontmatter links (MANDATORY):
    → Ideas/existing-note-1 — type: extends
    → Ideas/existing-note-2 — type: supports
    → People/person-slug — type: related
  RIPPLE (reverse-direction updates to existing notes):
    → Ideas/existing-note-1 — add body [[new-note-slug]] wikilink + add to its related: array (type: extends)
    → Ideas/existing-note-2 — update Evidence section with new data point + add to related:
    → Ideas/existing-note-3 — ⚠️ CONTRADICTION: new source says X, note says Y — type: contradicts
  NO CHANGE: Ideas/tangentially-related — mentioned same tag but no substantive connection

Step 4 — Execute ripple updates

After the user approves (or you determine updates are low-risk cross-references):

• Primary note: ensure related: frontmatter array has 2-4 typed entries — this is mandatory, not optional
• Related notes: add reverse-direction related: entries to their frontmatter with appropriate types
• Body wikilinks: add [[wikilinks]] in existing prose where natural (not forced)
• Update updated: to today's date from date +%Y-%m-%d on modified notes; leave their created: untouched
• For contradictions: add a > ⚠️ **Contradiction:** [note] claims X — see [[new-note]] for counter-evidence callout, AND add type: contradicts in related: arrays

Step 5 — Log and index

Append to KNOWLEDGE/_log.md:

## [YYYY-MM-DD] ingest | Title
- Source: <url or path>
- Primary: <Type>/<slug>
- Ripple: N notes updated, N contradictions flagged

Regenerate MOCs:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeHarvester.ts index

Present in NATIVE mode.

---

contradictions

Find and review conflicting claims across Knowledge notes.

Step 1 — Get contradiction candidates

Run the KnowledgeHarvester contradiction finder:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeHarvester.ts contradictions

This outputs pairs of notes with high tag overlap (2+ shared tags), ranked by overlap count.

Step 2 — Semantic review

For each pair (up to 10 highest-overlap pairs):

1. Read both notes
2. Extract key claims from each (Thesis, Evidence, Key Facts sections)
3. Check for:
   • Direct contradictions — Note A says X, Note B says not-X
   • Temporal supersession — Note A's claim is outdated by Note B's newer evidence
   • Scope conflicts — Both claim authority on the same topic but reach different conclusions

Step 3 — Report

Present findings:

🔍 CONTRADICTION SCAN:
  Pairs checked: N
  Contradictions found: N
  Superseded claims: N

  ⚠️ CONTRADICTION:
    [[note-a]] claims: "X"
    [[note-b]] claims: "Y"
    Resolution: [suggest which is correct, or flag for the user]

  📅 SUPERSEDED:
    [[older-note]] (2026-01-15): "X was true"
    [[newer-note]] (2026-03-20): "X is no longer true because Y"
    Action: Update older note with correction

Step 4 — Fix (with approval)

If the user approves resolutions:

• Update contradicted notes with correction callouts
• Update superseded notes with > 📅 **Updated:** See [[newer-note]] for current information
• Update updated: dates
• Regenerate MOCs

Present in NATIVE mode.

---

graph [slug]

Navigate the Knowledge Archive as a graph.

No argument — stats overview:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeGraph.ts stats

Show node count, edge count, top clusters, most connected hubs, and isolated nodes.

With slug — traverse from a note:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeGraph.ts traverse <slug> --hops 2

Show all notes connected within 2 hops via tags, wikilinks, and typed relationships. Useful for exploring how knowledge connects across domains.

Related notes only:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeGraph.ts related <slug>

Present in NATIVE mode.

---

retrieve

Compressed context retrieval over the Knowledge Archive using BM25-lite scoring.

bun ~/.claude/LIFEOS/TOOLS/MemoryRetriever.ts "<query>" --top 5

Returns the top matching notes with compressed summaries, ranked by title match, tag overlap, and content frequency. Useful for loading relevant knowledge context without reading full files.

For raw excerpts without LLM compression:

bun ~/.claude/LIFEOS/TOOLS/MemoryRetriever.ts "<query>" --raw

Present in NATIVE mode.

---

mine

Mine recent conversations for memory candidates (decisions, preferences, milestones, problems).

bun ~/.claude/LIFEOS/TOOLS/SessionHarvester.ts --mine --recent 10

Candidates are written to KNOWLEDGE/_harvest-queue/ for review — never directly to KNOWLEDGE/. Use /knowledge harvest to process the queue.

For dry run (preview only):

bun ~/.claude/LIFEOS/TOOLS/SessionHarvester.ts --mine --recent 10 --dry-run

Present in NATIVE mode.

---

distill

Weekly harvest of the archive into routed outputs. Distill is a router, not a destination: every item lands in the system of record that already owns it, and the digest is an index pointing at those destinations. It never creates or edits KNOWLEDGE notes (mutations belong to develop/contradictions/ingest), and it never re-surfaces an item a previous run already routed.

Done looks like: a dated digest at ~/.claude/LIFEOS/MEMORY/DIGESTS/YYYY-MM-DD-distill.md with ≤10 items across three lanes, every item citing its source notes and linking its routed destination; ≤5 content-idea issues filed; ≤5 upgrades filed; all surfaced items marked in state. Overflow is named with a dropped-count, never silently truncated.

Step 1 — Gather (deterministic)

bun ~/.claude/LIFEOS/TOOLS/KnowledgeDistill.ts gather --days 7

Returns JSON: in-window notes (created/updated, minus previously surfaced), hot tag clusters (window count vs archive baseline), seedling and contradiction stats.

Step 2 — Synthesize (the model leg)

Cluster the candidates into digest items. Quality bar per item: ≥2 source notes, a why-now line (recency, cluster growth, or TELOS relevance), and a one-sentence pitch in plain language. Three lanes:

• Content candidates — ideas that could become a post, newsletter section, or video. Bias toward the principal's TELOS content goals.
• System improvements — anything that smells like a LifeOS upgrade.
• Archive health — contradiction pairs and seedling counts, report-only; deeper action routes to /knowledge contradictions or /knowledge develop.

Step 3 — Route to systems of record

Content lane (≤5). The destination repo and label come from LIFEOS/USER/CUSTOMIZATIONS/SKILLS/Cortex/DistillConfig.json (contentRepo, contentLabel) — never hardcoded here:

gh issue create --repo <contentRepo> --label <contentLabel> \
  --title "<pitch>" --body "<why-now + source note paths + suggested format>"

No config file → skip the issue lane and list content candidates in the digest only.

System lane (≤5; dedupe is claim-hash based, duplicates exit 0 silently):

bun ~/.claude/LIFEOS/TOOLS/Upgrades.ts add --claim "<one sentence>" --source autonomous \
  --recommendation "<proposed encoding>" --target <hook|doctrine|rule|skill|settings|context> \
  --evidence "<source note path>"

Step 4 — Digest + mark

Write the digest file (lanes as sections; every item: pitch, sources, destination link or "empty — "), then:

bun ~/.claude/LIFEOS/TOOLS/KnowledgeDistill.ts mark --digest <digest-path>

which records surfaced slugs and item hashes in MEMORY/STATE/distill.json.

Headless / scheduled

bun ~/.claude/LIFEOS/TOOLS/KnowledgeDistill.ts run --headless [--dry-run] performs all four steps unattended (synthesis via Inference.ts, never a nested claude session). The weekly launchd job com.lifeos.distill (Sun 09:00) runs exactly this. --dry-run prints the full routing plan and writes nothing.

Present in NATIVE mode.

---

recall

Find prior LifeOS work — sessions, ISAs, conversations — by topic, partial words, or date phrases like "yesterday" or "last week". A deterministic Bun CLI searches five sources in parallel (work registry, session names, work dir names, ISA bodies, conversation jsonl), scores by token-overlap × recency, applies date filters, and returns ranked results with snippets.

bun run ~/.claude/skills/Cortex/Tools/ContextSearch.ts "$ARGUMENTS" --pretty --limit 10

Flag patterns: --limit N · --since YYYY-MM-DD · --json | jq '.results[0]'. Date phrases parse inline: "yesterday markdown" becomes a single-day since/until window plus token search for markdown.

Usage modes:

1. Standalone (/cs <topic> or an explicit recall ask) — present the pretty block, then: "Context loaded on [topic]. Most recent: [X]. What would you like to do?"
2. Paired with a request — run the search silently first, use top results to anchor the answer; Read a result's path when deeper detail helps. Don't dump the search block unless asked.

Recall gotchas (ported from the retired ContextSearch skill):

• Token-overlap scoring, not substring matching — queries hit sessions sharing ≥1 non-stopword token, so half-remembered phrasing works.
• today/yesterday/last week/N days ago/YYYY-MM-DD parse out as bounded date filters; remaining tokens still score content.
• JSONL date = first user-message timestamp, not file mtime (mtime drifts on re-read); session-names.json entries fall back to mtime.
• JSONL search is restricted to this install's own conversation directory by design.
• No persistent index — every query rescans (~1–2s total); an opt-in cached index is the v2 if scale demands.

---

Gotchas

• 4 entity types now. People (human beings), Companies (organizations), Ideas (insights/theses/analyses), Research (multi-source investigations with methodology). If it doesn't fit one of these, it's not knowledge — it belongs in WORK/ or LEARNING/.
• Topic = tag, not domain. A security insight is an Idea with a security tag. Never create topic-based folders.
• The lookup test. "Would the user look this up by name?" — if not, it's not knowledge.
• Schema enforcement. Each entity type has required fields defined in _schema.md. Always read the schema before writing.
• Algorithm LEARN phase writes directly. The LEARN phase has the best context — it writes to KNOWLEDGE/ with proper schemas. Harvester reflections are disabled.
• Never delete notes without asking. Pruning is automatic (90-day seedling expiry via harvester). Manual deletion requires the user's approval.
• Wikilinks use strict kebab-case. [[prompt-injection]] not [[Prompt Injection]].
• All harvested notes start as seedlings. Only /knowledge develop promotes them.
• Temporal validity is optional. Notes can have valid_from/valid_until frontmatter fields to track when facts were true. The contradiction detector uses these to skip non-overlapping time windows.

Examples

Example 1: Search the archive

User: "what do we know about prompt injection?"
→ Routes to search — 3-pass (lexical + frontmatter + wikilink) over MEMORY/KNOWLEDGE/
→ Returns table of matching notes with domain, status, tags

Example 2: Ingest a source

User: "/knowledge ingest https://example.com/article"
→ Fetches the source, classifies entity type, creates primary note with typed related: links
→ Ripple pass proposes updates to existing related notes; user approves; MOCs regenerated

Example 3: Status check

User: "knowledge status"
→ Runs KnowledgeHarvester.ts status
→ Shows domain note counts, orphan wikilinks, stale seedlings, time since last harvest