convert pdf to md, add OVERVIEW and docs

worker-toolkit-stocks-in-the-future/repo/docs/map/_meta/schema.md

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+# Schema — the rules of this map
+
+The closed set of node types, the labels they carry, and the naming they follow. When
+practice and this file disagree, reconcile the same day — schema drift is how maps rot.
+
+## Node types
+
+| `type:` | Lives at | Carries |
+|---|---|---|
+| object | `objects/<cluster>/<slug>.md` | one noun: why / shape / connected to / hits |
+| process | `processes/<slug>.md` | one movement: input → movement → output |
+
+That is the whole set. `effects/CONTEXT.md` is an index, not a node type — it holds no
+facts of its own, only pointers into the two types above.
+
+## Frontmatter
+
+Object cards:
+
+```yaml
+type: object
+cluster: identity | org | gradebook | money | trading | content
+universe: live | leftover | ghost
+status: stub | verified | stale
+entity: app/models/order.rb        # the file that owns the fact
+```
+
+Process cards add `consumes:` and `produces:` as relative links to object cards. Those
+links draw the graph on their own — do not maintain a separate edge list.
+
+## Label rules
+
+- `universe: live` is the default. `leftover` and `ghost` must say why in the card body.
+- `status: verified` requires **a date, a commit, and citations** in the card. A card
+  with no `path:line` may not be `verified`.
+- `status: stale` is allowed and preferred over a confident wrong claim.
+- `entity:` is one path. If a noun is owned by several files, the card's Shape section
+  lists them; `entity:` names the primary one.
+
+## Naming
+
+- Slugs: kebab-case, singular, matching the product word where it differs from the class
+  name (`grade-level.md` owns `Grade`).
+- Clusters are the six above. Adding a seventh requires three nouns that genuinely do not
+  fit — not one that is merely new.
+- `_meta/` and `_templates/` hold rules and blanks. Underscore = about the map, not of it.
+- `AGENTS.md` and `routing.md` are generated from `CLAUDE.md` by `_meta/sync-twins.sh`.
+  Never hand-edited.
+
+## Citation rule
+
+Code is the source of truth. Cite `path:line`. If a comment and the code disagree, the
+code wins and the card says so. Never paste behaviour into a card that the source
+already states — point at it.