wiki-ingest

# wiki-ingest: Source Ingestion

Read the source. Write the wiki. Cross-reference everything. A single source typically touches 8-15 wiki pages.

**Syntax standard**: Write all Obsidian Markdown using proper Obsidian Flavored Markdown. Wikilinks as `[[Note Name]]`, callouts as `> [!type] Title`, embeds as `![[file]]`, properties as YAML frontmatter. If the kepano/obsidian-skills plugin is installed, prefer its canonical obsidian-markdown skill for Obsidian syntax reference. Otherwise, follow the guidance in this skill.

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## Transport (v1.7+)

Before mutating any vault file, consult `.vault-meta/transport.json` (auto-created by `bash scripts/detect-transport.sh`). Use the `preferred` transport per the fallback chain:

- **cli** — `obsidian-cli write "$VAULT" "$NOTE" < content.md` (or `append`, `property:set`); see [`skills/wiki-cli/SKILL.md`](../wiki-cli/SKILL.md)
- **mcp-obsidian** / **mcpvault** — `mcp__obsidian-vault__write_note` and friends; see [`skills/wiki/references/mcp-setup.md`](../wiki/references/mcp-setup.md)
- **filesystem** — Claude's `Write`/`Edit` tools with absolute vault-rooted paths (final floor; always works)

Full decision tree: [`wiki/references/transport-fallback.md`](../../wiki/references/transport-fallback.md).

---

## Mode awareness (v1.8+)

Before creating any new wiki page, consult the vault's methodology mode via `python3 scripts/wiki-mode.py route <type> "<name>"`. The router returns the vault-relative path where the page should be filed.

```bash
SRC_PATH=$(python3 scripts/wiki-mode.py route source "Karpathy 2025 LLM Wiki essay")
# generic:      wiki/sources/Karpathy-2025-LLM-Wiki-essay.md
# lyt:          wiki/notes/Karpathy-2025-LLM-Wiki-essay.md  (also update relevant MOC)
# para:         wiki/resources/incoming/Karpathy-2025-LLM-Wiki-essay.md
# zettelkasten: wiki/20260517123456-Karpathy-2025-LLM-Wiki-essay.md

ENT_PATH=$(python3 scripts/wiki-mode.py route entity "Andrej Karpathy")
CON_PATH=$(python3 scripts/wiki-mode.py route concept "Compounding Vault Pattern")
```

If `.vault-meta/mode.json` is absent, the router returns mode=generic paths (identical to v1.7 behavior). No special-casing needed in this skill.

Mode-specific follow-up:
- **LYT**: after filing the atomic note, update the relevant MOC (`wiki/mocs/<topic>-moc.md`) to link the new note. If no MOC exists for the topic, create one using `skills/wiki-mode/templates/lyt/moc-template.md`.
- **Zettelkasten**: filename already includes the timestamp ID. Populate the `id:` frontmatter field to match.
- **PARA**: new ingests land in `wiki/resources/incoming/` by default. Do NOT auto-guess the topic; leave in incoming/ for user review.

## Concurrency (v1.7+)

**Multi-writer is safe in v1.7.** The latent corruption bug from v1.6 — where two parallel sub-agents writing to the same page could silently trample each other — is closed by per-file advisory locking. Every wiki page write MUST be preceded by `wiki-lock acquire <path>`.

```bash
# Acquire — blocks (returns 75 EX_TEMPFAIL) if another writer holds the lock
if bash scripts/wiki-lock.sh acquire wiki/concepts/Foo.md; then
  # ... do the write via the §Transport-selected method ...
  bash scripts/wiki-lock.sh release wiki/concepts/Foo.md
else
  # rc=75: another writer is in flight. Retry once after 2s; if still held,
  # log to wiki/log.md and skip this page rather than overwrite.
  sleep 2
  bash scripts/wiki-lock.sh acquire wiki/concepts/Foo.md && {
    # write …
    bash scripts/wiki-lock.sh release wiki/concepts/Foo.md
  } || echo "skipped wiki/concepts/Foo.md (locked); logged to wiki/log.md"
fi
```

Properties:
- **Per-file granularity.** Locks key on `sha1(<vault-relative-path>)`; concurrent writes to DIFFERENT pages run in parallel.
- **Age-based staleness.** Default `STALE_AFTER_SEC=60`. A crashed holder unblocks in ≤60 seconds without manual intervention. See `scripts/wiki-lock.sh` header for the full semantics.
- **Cross-process release.** Release is `rm -f` (no PID match required). Skill authors are trusted to release locks they acquire; cross-skill release is allowed by design (a janitor running `wiki-lock clear-stale --max-age 0` is the canonical recovery path).
- **The PostToolUse hook now defers `git add` if any locks are currently held**, so the auto-commit doesn't fire mid-ingest and produce torn commits. See `hooks/hooks.json`.

`wiki-lock` is unconditional in v1.7+ — there is no feature gate, no fallback. Skills that don't acquire locks are racing against any other writer. The script is in core, not opt-in.

Sub-agent rule from v1.6 — *"Sub-agents MUST NOT call `scripts/allocate-address.sh`"* — is preserved (orchestrator still backfills addresses to keep the counter monotonic). The NEW rule is: *sub-agents MAY now write pages, but MUST acquire locks first.* See `agents/wiki-ingest.md`.

---

## Delta Tracking

Before ingesting any file, check `.raw/.manifest.json` to avoid re-processing unchanged sources.

```bash
# Check if manifest exists
[ -f .raw/.manifest.json ] && echo "exists" || echo "no manifest yet"
```

**Manifest format** (create if missing):
```json
{
  "sources": {
    ".raw/articles/article-slug-2026-04-08.md": {
      "hash": "abc123",
      "ingested_at": "2026-04-08",
      "pages_created": ["wiki/sources/article-slug.md", "wiki/entities/Person.md"],
      "pages_updated": ["wiki/index.md"]
    }
  }
}
```

**Before ingesting a file:**
1. Compute a hash: `md5sum [file] | cut -d' ' -f1` (or `sha256sum` on Linux).
2. Check if the path exists in `.manifest.json` with the same hash.
3. If hash matches, skip. Report: "Already ingested (unchanged). Use `force` to re-ingest."
4. If missing or hash differs, proceed with ingest.

**After ingesting a file:**
1. Record `{hash, ingested_at, pages_created, pages_updated}` in `.manifest.json`.
2. Write the updated manifest back.

Skip delta checking if the user says "force ingest" or "re-ingest".

---

## URL Ingestion

Trigger: user passes a URL starting with `https://`.