Obsidian frontmatter inventory: read-only census of the root-and-branch vault
Every .md parsed (2,519 files, no sampling), parser carrying four controls. 400 distinct keys over 5,867 instances; 68% of notes have no frontmatter at all. Consumption cross-referenced against 357 dataview/tasks blocks, 23 templates and all 39 .obsidian configs: 66 keys consumed (62% of instances), 29 written by template and read by nothing, 305 orphaned. The Compass governance block — canonical/owner/assurance/change_log/links/related — is in the written-not-read set on 67-161 notes each. Method correction recorded in the report: the first template pass matched key names anywhere in a file containing Templater syntax, which tests whether the word occurs in prose rather than whether a template writes the key. Redone against each template's own frontmatter block. Inventory only — no proposed schema, per the brief. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
David F Glidden
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Claude Opus 5
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---
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name: obsidian-vault-frontmatter-inventory-2026-08-19
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description: Read-only inventory of YAML frontmatter conventions in the "David, root-and-branch" Obsidian vault — key census, consumption cross-reference, folder correlation, template drift. No proposals.
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type: reference
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---
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# Obsidian frontmatter inventory — *David, root-and-branch*
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**Date:** 2026-08-19 · **Mode:** read-only audit, no edits · **Scope:** the root-and-branch vault only
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(`Ars Legendi` and `DFG Principles` exist and were **not** audited).
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**Method.** Every `*.md` outside `.obsidian/`, `.trash/`, `.git/`, `.smart-env/` was parsed — 2,519 files,
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no sampling. Frontmatter recognised only as a `---` block **beginning at byte 0**; a stray `---` mid-file
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is not frontmatter. The parser carries four controls, all passing: well-formed → detected; no
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frontmatter → none; stray mid-file `---` → none; unterminated → reported as its own outcome rather than
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folded into silence. Keys were harvested **twice** — once via `yaml.safe_load`, once textually — so a
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parse failure cannot silently shrink the census (410 textual key-lines vs 400 parsed keys; the gap is the
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21 unparseable notes in §6).
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---
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## 1. Coverage — the first number
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| | notes |
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|---|---|
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| markdown files | **2,519** |
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| **no frontmatter at all** | **1,713 (68%)** |
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| frontmatter present | 806 (32%) |
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| … parsed as a mapping | 784 |
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| … YAML error | 20 |
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| … not a mapping / empty | 2 |
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| unreadable | 0 |
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| unmaterialized iCloud placeholders | **0** — so this census is of the vault, not of what happened to be downloaded |
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**By folder** — coverage is not uniform; it tracks how recently and how deliberately a folder was built.
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| folder | notes | with frontmatter | % |
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|---|---:|---:|---:|
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| 99. Archive | 1,070 | 120 | **11%** |
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| 08. Notes | 596 | 230 | 38% |
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| 00. Compass | 400 | 193 | 48% |
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| 06. Projects | 246 | 105 | 42% |
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| 04. Life admin | 47 | 45 | **95%** |
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| 07. Learn | 29 | 19 | 65% |
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| 97. Tools and Systems | 28 | 26 | 92% |
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| 98. Templates | 23 | 18 | 78% |
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| 03. People | 21 | 14 | 66% |
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| 05. Work | 21 | 7 | 33% |
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| 02. Reviews & Planning | 13 | 7 | 53% |
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| 01. Daily | 11 | 10 | 90% |
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| 00a. _inbox | 11 | 11 | 100% |
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| 09. Atlas of Roots | 1 | 1 | 100% |
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| 10. Instrumentarium | 1 | 0 | 0% |
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| (vault root) | 1 | 0 | 0% |
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---
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## 2. The key census — 400 distinct keys, 5,867 instances
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**Distribution is extremely long-tailed.** 227 keys (57%) appear on one or two notes; **170 appear
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exactly once**. The top 10 keys carry 3,145 instances — 54% of all frontmatter in the vault.
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### Keys on ≥10 notes, with observed value shapes
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| key | notes | shapes observed |
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|---|---:|---|
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| `tags` | 698 | `list[str]`×689, `list[int\|str]`×6, empty×1, nested-list×1 |
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| `title` | 610 | `str`×605, null/empty×5 |
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| `type` | 416 | `str`×416 — **the only high-frequency key with a single shape** |
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| `created` | 359 | `date`×339, `str(date-like)`×12, `str`×7, nested-list×1 |
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| `status` | 305 | `str`×305 |
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| `version` | 164 | `str`×157, **`float`×6**, `date`×1 |
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| `date` | 163 | `date`×155, `str`×7, `str(wikilink)`×1 |
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| `canonical` | 161 | `str`×158, **`bool`×3** |
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| `owner` | 153 | `str`×153 |
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| `assurance` | 126 | `dict`×117, **`str`×8**, null×1 |
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| `last_reviewed` | 123 | `date`×115, `str`×5, null×1, nested-list×1 |
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| `related` | 120 | `list[str]`×90, nested-list×8, `list[wikilink]`×7, `list[list]`×6 |
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| `change_log` | 89 | `list[dict]`×51, **empty list×38** |
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| `source` | 86 | `str`×79, `list[str]`×3, `str(url)`×2, `dict`×1 |
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| `project` | 83 | `str`×81, `list[str]`×2 |
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| `next_review` | 80 | `date`×80 |
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| `links` | 77 | `dict`×76, null×1 |
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| `aliases` | 71 | `list[str]`×71 |
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| `location` | 67 | `str`×58, null×8, nested-list×1 |
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| `category` | 52 | `str`×43, `list[str]`×9 |
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| `week` | 51 | `str`×51 |
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| `author` | 49 | `str`×45, `list[str]`×3, `dict`×1 |
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| `last_updated` | 38 | `date`×38 |
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| `description` | 36 | `str`×36 |
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| `origin` | 34 | `str`×34 |
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| `layout` | 33 | `str`×33 |
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| `mood` | 30 | **null/empty×26**, `str`×4 |
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| `focus` | 24 | **null/empty×24 — never once filled in** |
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| `vault_section` / `month` / `marker` | 23 each | `str` |
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| `class` / `roaster` | 22 each | `str` |
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| `review_cycle` | 21 | `str` |
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| `water` | 21 | `int`×10, `float`×6, `str`×4, `list`×1 |
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| `coffee` | 21 | `str` |
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| `grind_setting` | 21 | `float`×16, `str`×3, `int`×2 |
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| `related_notes` | 20 | `list[str]`×13, `list[wikilink]`×4, nested×1, empty×1 |
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| `bloom` | 20 | `int`×11, `float`×8, `str`×1 |
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| `brew_temp` | 20 | `str`×16, `list[list[str]]`×4 |
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| `superseded_by` | 18 | `list[list[str]]`×18 |
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| `depends_on` | 17 | `list[wikilink]`×6, nested×5, `list[str]`×4, empty×2 |
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| `summary` | 17 | `str` |
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| `family` | 16 | empty×6, `dict`×6, null×4 |
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| `context` | 15 | `str`×8, null×6, `dict`×1 |
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| `retention` | 15 | `float`×9, `str`×4, `int`×2 |
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| `updated` | 14 | `date`×14 |
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| `languages` / `permalink` / `process` | 13 each | mixed / `str` / `str` |
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| `relationship`, `dob`, `latitude`, `longitude`, `source_type`, `attributed_to`, `date_claimed`, `first_cited`, `fictional_description`, `chambers_cited_in`, `excerpts`, `dose`, `weather`, `temperature`, `humidity`, `pressure` | 12 each | see JSON |
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| `citizenship`, `draft_created`, `emerged_from`, `related_real_sources`, `dateAdded`, `lastUpdated`, `method`, `roast_level`, `bloom_time`, `pour_strategy`, `total_time`, `rating` | 11 each | see JSON |
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| `alias`, `person`, `bill_number`, `moon_phase` | 10 each | see JSON |
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*Full per-key detail — every shape, four sample values, folder distribution, and the file list — is in
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`fm_inventory.json` alongside this report.*
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### 2a. Type instability, observed
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Nine keys carry more than one value type. Three matter because a query would silently mis-sort or drop rows:
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- `version` — `str`×157 but **`float`×6** (`1.0` unquoted becomes a number) and `date`×1.
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- `canonical` — `str`×158 but **`bool`×3** (`true` unquoted).
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- `assurance` — `dict`×117 but **`str`×8**: the same key is a structure on most notes and a bare string on eight.
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- Nested-list shapes (`list[list[...]]`) on `created`, `related`, `location`, `superseded_by`, `brew_temp`,
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`linked_daily_note` are the signature of a wikilink or date written unquoted inside a YAML list —
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`- [[Note]]` parses as a nested list, not a link.
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### 2b. Two keys that collide with Dataview's own namespace
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- **`file`** is used as a frontmatter key on 5 notes. `file` is Dataview's implicit page object
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(`file.link`, `file.day`, `file.name`) and appears in 83 query blocks in that sense.
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- **`date`** on 163 notes coexists with Dataview's `file.day`, which is inferred from the filename.
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---
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## 3. Consumption — is anything reading these keys?
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Cross-referenced against every consumption surface in the vault: **357 code blocks** (264 `dataview`,
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72 `dataviewjs`, 21 `tasks`) across 98 notes; **23 templates** in `98. Templates`; all **39** `.obsidian`
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JSON configs; 14 CSS snippets.
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> **A method note, because the first pass of this was wrong.** I initially scored a key as
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> "written by a template" if its name appeared *anywhere* in a file containing Templater syntax. That
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> tests whether the word occurs in the prose, not whether a template writes the key — and it inflated
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> the bucket badly (`practice`, `work`, `note` all scored as template-written on prose matches alone).
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> The figures below come from parsing each template's **own frontmatter block**. Likewise, Dataview
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> matches are made after stripping string literals and `FROM` clauses, so a folder path like
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> `FROM "08. Notes"` no longer counts as consumption of a key named `notes`.
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| verdict | keys | key-instances |
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|---|---:|---:|
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| **CONSUMED** — appears in a Dataview query field position | 66 | **3,661 (62%)** |
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| **WRITTEN-NOT-READ** — a template writes it, no query reads it | 29 | 1,128 (19%) |
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| **ORPHAN** — no template declares it, no query reads it | **305** | 1,078 (18%) |
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| DECLARED-ONLY (`types.json`, unqueried) | 0 | 0 |
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**The shape of it: the *mass* is consumed, the *variety* is not.** 62% of all frontmatter instances sit
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on the 66 keys something actually reads. But 305 of 400 distinct keys — 76% — are read by nothing, and
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248 of those appear on four notes or fewer.
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### 3a. WRITTEN-NOT-READ — the governance block is the largest instance
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These are written faithfully by template onto hundreds of notes and queried by nothing in the vault:
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| key | notes | declared by |
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|---|---:|---|
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| `canonical` | 161 | 1 template |
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| `owner` | 153 | 1 |
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| `assurance` | 126 | 1 |
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| `related` | 120 | 1 |
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| `change_log` | 89 | 1 — and **38 of the 89 are an empty list** |
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| `links` | 77 | 1 |
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| `aliases` | 71 | 1 |
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| `location` | 67 | 1 |
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| `vault_section` | 23 | 2 |
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| `month` | 23 | 3 |
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| `review_cycle`, `water`, `bloom`, `brew_temp` | 20–21 | 1–2 |
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| `family`, `languages`, `process`, `relationship`, `dob`, `dose` | 12–16 | 1–2 |
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| `citizenship`, `bloom_time`, `pour_strategy`, `alias` | 10–11 | 1–2 |
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| `reflection`, `homeopathy`, `skin_observations`, `full_name`, `occupation` | 2–7 | 1 |
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`canonical`, `owner`, `assurance`, `change_log`, `links`, `related` are the Compass's own
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governance/provenance apparatus — the fields that would answer *is this authoritative, who holds it,
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when was it last checked, what does it depend on.* **Nothing queries them.**
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### 3b. ORPHAN keys on ≥5 notes — no template, no query
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`source`(86) · `last_updated`(38) · `layout`(33) · `focus`(24) · `marker`(23) · `related_notes`(20) ·
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`vault_path`(19) · `depends_on`(17) · `context`(15) · `permalink`(13) · `source_type`(12) ·
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`attributed_to`(12) · `date_claimed`(12) · `first_cited`(12) · `fictional_description`(12) ·
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`chambers_cited_in`(12) · `excerpts`(12) · `weather`(12) · `temperature`(12) · `humidity`(12) ·
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`pressure`(12) · `emerged_from`(11) · `related_real_sources`(11) · `dateAdded`(11) · `lastUpdated`(11) ·
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`method`(11) · `person`(10) · `bill_number`(10) · `created_by`(9) · `address`(9) · `billing_period`(9) ·
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`dose_in`(9) · `dose_out`(9) · `pour_durations`(9) · `chat_topics`(9) · `due_date`(8) ·
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`contract_number`(8) · `organ`(7) · `currency`(7) · `meter_number`(7) · `payment_method`(7) · `cups`(7) ·
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`moon_illumination`(7) · `steward`(7) · `period`(6) · `language`(6) · `brew_time`(6) ·
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`executor-action`(6) · `body`(6) · `sources`(5) · `spiral_stage`(5) · `symbol`(5) · `provenance`(5) ·
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`domain`(5) · `sequence`(5) · `published`(5) · `tone`(5)
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**plus 248 orphan keys on 1–4 notes (385 instances).**
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### 3c. Obsidian's own property registry is effectively unused
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`.obsidian/types.json` declares **26** properties. Twenty-two are `TQ_*` UI toggles belonging to the
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Tasks plugin. The genuine declarations are **four**: `aliases`, `cssclasses`, `tags`, `status`. Of the
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400 keys in use, 396 have no declared type.
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---
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## 4. Folder correlation — distinct shapes do exist
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Five folders show a consistent, recognisable shape; the rest are mixed.
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- **`00. Compass`** — 84 keys / 1,836 instances. The most consistent shape in the vault:
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`title`(190) `tags`(163) `status`(137) `type`(135) `version`(115) `canonical`(107) `owner`(99)
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`created`(80) `assurance`(78). This is a governed-document shape and it is applied evenly.
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- **`03. People`** — 29 keys / 100 instances, tightly matching the People template:
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`relationship`(10) `languages`(9) `dob`(9) `citizenship`(9) `family`(8) `alias`(8).
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- **`01. Daily`** — 18 keys / 69 instances: `date` `week` `month` `health` `family` `work` `reflection`.
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Only 11 notes remain in the folder; `week`(51) and `mood`(30) live mostly in `99. Archive`, so the
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daily practice has been archived rather than discontinued.
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- **`04. Life admin`** — 95% coverage but **120 distinct keys** over 47 notes: `bill_number`
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`billing_period` `meter_number` `contract_number` `tariff` `power_contracted_kw` `total_amount_eur`.
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A per-document-type shape, invented per bill rather than shared.
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- **`08. Notes`** — **188 distinct keys**, the widest in the vault, because it holds unrelated
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populations at once: coffee logs (17-key tasting shape), book notes, CapableMind architecture notes,
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chamber material (`attributed_to` `first_cited` `chambers_cited_in` `fictional_description`).
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- **`99. Archive`** — 1,070 notes, 11% coverage, 51 keys. Mostly ChatGPT exports carrying
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`tags`/`type`/`aliases`/`date`/`location`/`week`/`mood`.
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---
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## 5. Template drift
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**23 templates.** Five carry **no frontmatter at all** — `Book_Note_Template`,
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`Document (PDF) note template`, `End of Day Checklist`, `GPT_Model_Selector_Template`,
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`Zibaldone Note Template`. Notes made from them start with no properties.
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**Four emit frontmatter that does not parse as YAML** — `PPP_Template`,
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`Tasting_Log_Template_Dataview`, `Tasting_Log_Template_With_Blend`, `Weekly_Coffee_Journal_Template` —
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because Templater expressions sit unquoted in value positions. Their keys had to be harvested textually.
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This is upstream of §6: a template that emits invalid YAML propagates it to every note it creates.
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**No template declares a key that appears on zero notes** — every declared key is in real use somewhere.
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**Declared-vs-actual drift**, comparing each template against its target folder:
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| template → folder | declared but absent | present (≥3 notes) but undeclared |
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|---|---|---|
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| Daily Note → `01. Daily` | — | `title` |
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| People → `03. People` | — | `title` |
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| Weekly_Review → `02. Reviews` | — | — |
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| Quarterly Review → `02. Reviews` | — | `last_reviewed`, `start_date`, `week` |
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| Monthly Review → `02. Reviews` | `month`, `year` | `start_date`, `week` |
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| Yearly Compass → `02. Reviews` | `year` | `last_reviewed`, `start_date`, `week` |
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| concept_thread → `08. Notes` | `vault_section` | 73 keys |
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| Tasting_Log_Dataview → `08. Notes` | — | 60 keys |
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> ⚠ **What this comparison can and cannot show.** A note does not record which template made it, so
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> "target folder" is a **proxy**. It is a fair proxy for `01. Daily`, `03. People` and `02. Reviews`,
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> where the folder holds one note type. It is **not** meaningful for `08. Notes`, which holds many
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> unrelated populations — the "73 undeclared keys" there is an artefact of the proxy, not drift. Read
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> those two rows as *not established*, not as a finding.
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>
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> `title` is the one clean drift signal: two templates that do not declare it, on folders where notes
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> consistently carry it.
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---
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## 6. Notes whose frontmatter is invisible — 21
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These parse as neither properties nor Dataview fields. Whatever they claim, **nothing can read it**:
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`03. People/Kai Aureli Glidden Pujolràs.md` · `03. People/Lune Polymnie Marie Glidden.md` ·
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`04. Life admin/Life Admin — To-Do Master List.md` · `98. Templates/Weekly_Coffee_Journal_Template.md` ·
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`98. Templates/PPP_Template.md` · `98. Templates/Tasting_Log_Template_With_Blend.md` ·
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`98. Templates/Tasting_Log_Template_Dataview.md` · `00a. _inbox/2025-09-13-- wild gut.md` ·
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`00. Compass/…/Animal Rationis Capax/99. Archives—Previous…` ·
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`00. Compass/…/ARC/Stubs & ideas/Lang…` · `00. Compass/…/ARC/Stubs & ideas/Fire…` ·
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`05. Work/CV-bio/Site version of CV.md` · `04. Life admin/01. DFG/04. Health/Transition Ritual/…` ·
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`04. Life admin/01. DFG/06. Passeig de Sant Joan/Facturas/Electricidad/…` ·
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`08. Notes/Reflections/The Chamber as Threshold.md` · `08. Notes/Children/02. Kai/Kai – Vaccine Record.md` ·
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`08. Notes/CapableMind/thinking-mirror/architecture/cold-start-ingestion-…` ·
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`08. Notes/Claudia Grice/05 Taxes/…/Med…` (frontmatter is a string, not a mapping) ·
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`97. Tools and Systems/04. Philosophical Curricula/Zen_Mind_Beginners_Min…` ·
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`…/Ways_of_Seeing_Berger…` · `…/The_Timeless_Way_of_Bu…`
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Both children's People notes are in this list.
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---
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## 7. Variants and near-duplicates
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### 7a. Same key, different spelling
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| normalised | variants (notes, verdict) |
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|---|---|
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| tag | `tags`(698, consumed) · `tag`(3, consumed) |
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| source | `source`(86, orphan) · `sources`(5, orphan) |
|
||||
| last_updated | `last_updated`(38, orphan) · `last-updated`(3, orphan) |
|
||||
| related_note | `related_notes`(20, orphan) · **`related notes`**(1) — *with a space* |
|
||||
| language | `languages`(13, written-not-read) · `language`(6, orphan) |
|
||||
| note | `note`(19) · `notes`(7) |
|
||||
| domain | `domain`(5) · `domains`(2) |
|
||||
| period | `period`(6) · `periods`(1) |
|
||||
| theme | `themes`(6, consumed) · `theme`(1, orphan) |
|
||||
| nif | `nif`(2) · `NIF`(2) |
|
||||
| consumption_kwh | `consumption_kwh`(2) · `consumption_kWh`(1) |
|
||||
| linked_note | `linked_notes`(2) · `linked_note`(1) |
|
||||
| tool | `tools`(1) · `tool`(1) |
|
||||
|
||||
### 7b. Same job, unrelated spelling
|
||||
|
||||
**"When was this touched" — six keys, three read, three not:**
|
||||
`last_reviewed`(123, consumed) · `last_updated`(38, **orphan**) · `updated`(14, consumed) ·
|
||||
`lastUpdated`(11, **orphan**) · `modified`(4, orphan) · `last-updated`(3, orphan).
|
||||
|
||||
**"When was this made" — six keys:** `created`(359, consumed) · `date`(163, consumed) ·
|
||||
`dateAdded`(11, orphan) · `draft_created`(11, consumed) · `created_by`(9, orphan) · `date-created`(3, orphan).
|
||||
|
||||
**Relations — twelve keys, three read:** `related`(120, written-not-read) · `links`(77, written-not-read) ·
|
||||
`related_notes`(20, orphan) · `superseded_by`(18, **consumed**) · `depends_on`(17, orphan) ·
|
||||
`related_real_sources`(11) · `emerged_from`(11) · `related_threads`(9, **consumed**) · `parents`(4) ·
|
||||
`relations`(3) · `linked_to`(3) · `emerged_through`(3).
|
||||
|
||||
**Classification — seven keys, three read:** `type`(416, consumed) · `category`(52, consumed) ·
|
||||
`layout`(33, orphan) · `marker`(23, orphan) · `class`(22, consumed) · `domain`(5) · `document-type`(3).
|
||||
|
||||
**Provenance — eight keys, two read:** `source`(86, **orphan**) · `author`(49, consumed) ·
|
||||
`origin`(34, consumed) · `source_type`(12) · `attributed_to`(12) · `first_cited`(12) · `sources`(5) ·
|
||||
`provenance`(5).
|
||||
|
||||
**Identity:** `title`(610, consumed) · `aliases`(71, written-not-read) · `alias`(10, written-not-read) ·
|
||||
`document-title`(3) · `full_name`(2).
|
||||
|
||||
### 7c. Three naming conventions coexist
|
||||
|
||||
`snake_case` (dominant) · `kebab-case` (`last-updated`, `date-created`, `document-type`,
|
||||
`project-phase`, `executor-action`, `obsidian-folder`) · `camelCase` (`dateAdded`, `lastUpdated`).
|
||||
|
||||
---
|
||||
|
||||
## 8. Fields that are always empty
|
||||
|
||||
`focus` — 24 notes, **null on all 24**. `mood` — 30 notes, null on 26. `virtue`, `practice`, `meaning` —
|
||||
6 notes each, null on all. `change_log` — an empty list on 38 of 89. These are declared and carried but
|
||||
never filled.
|
||||
|
||||
---
|
||||
|
||||
## Instrument caveats
|
||||
|
||||
1. **"Consumed" means read by a Dataview query, a template, or Obsidian config inside this vault.** A key
|
||||
read by an external tool, by an MCP client, by Claude, or by the steward's eye is invisible to this
|
||||
method and would be scored ORPHAN. Every orphan verdict is therefore an **upper** bound on disuse.
|
||||
2. **`08. Notes` and `06. Projects` template-drift rows are proxy artefacts**, marked in §5 as not
|
||||
established.
|
||||
3. **21 notes could not be parsed.** Their keys are in the textual harvest but not the shape analysis, so
|
||||
§2's shape counts are a floor.
|
||||
4. **This is a point-in-time census**, 2026-08-19, of the vault as it stands on disk.
|
||||
|
||||
*Raw data: `fm_inventory.json` (per-key shapes, samples, folders, file lists), `final.json`
|
||||
(per-key consumption verdicts), `templates.json` (per-template declared keys).*
|
||||
Reference in New Issue
Block a user