research: UseModWiki deep dive (flat-file ancestor); SHARD-WP-0003 done

SHARD-WP-0003 T9 (final). Lineage dive: the flat-file ancestor (Clifford Adams
c.2000, from AtisWiki/CvWiki) that early Wikipedia ran on (MediaWiki Phase I).
No new capability -- reinforces the minimal flat-file floor (UC-82) and
CamelCase linking (UC-25); historical grounding that the file-store floor is
the field's common root. Enrichment-only: UC-01/40/25/36/41. Marks T9 done and
SHARD-WP-0003 complete (9/9). Feeds SHARD-WP-0002 T11.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

research/260614-usemodwiki-deep-dive/README.md

@@ -0,0 +1,14 @@
+# 260614 — UseModWiki deep dive
+
+Deep dive on **UseModWiki**: the **flat-file ancestor** — a Perl CGI wiki (Clifford Adams,
+2000) descended from AtisWiki/CvWiki, **CamelCase** linking, plain flat-file page + history
+storage, and the **engine Wikipedia originally ran on** (MediaWiki Phase I). Origins/lineage
+value: the minimal flat-file page+history model the whole field descends from.
+
+- `findings.md` — the model, lineage, capability profile, INTENT mapping, enrichments (no new
+  UC — reinforces the minimal flat-file baseline UC-82), architecture notes, sources,
+  traceability.
+
+Catalog yield: **enrichment-only** (reinforces UC-82) — enriched UC-01 (open wiki), UC-40
+(flat-file store), UC-25 (CamelCase naming), UC-36/41 (flat-file history). Lineage noted for
+the origins record. Feeds SHARD-WP-0002 T11 (minimal profile lineage).

research/260614-usemodwiki-deep-dive/findings.md

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+# UseModWiki — deep dive (findings)
+
+**Date:** 2026-06-14 · **Source:** SHARD-WP-0003 T9 · **Subject:** UseModWiki, Clifford
+Adams's flat-file Perl wiki — the lineage root of much of the field.
+
+## Why this dive
+
+This is a **lineage** dive, not a new-capability one. UseModWiki is the **ancestor**: the
+minimal flat-file page+history wiki the c2-era engines and **MediaWiki Phase I** descend
+from (Wikipedia ran on UseModWiki, 2001–2002). It pairs with
+`research/260608-c2-wiki-origins/` to record *where the page+history model came from*. It
+adds no new shard capability beyond the minimal flat-file floor (UC-82, Oddmuse) — its value
+is **historical grounding** and confirming the floor is genuinely the field's common root.
+
+## 1. The model
+
+- **Perl CGI** (`wiki.pl`), single-script, descended from AtisWiki → CvWiki → UseModWiki
+  (c. 2000), by Clifford Adams.
+- **Flat-file storage**: each page stored as a text file (under a `db/` data directory),
+  with **page history** kept (older revisions retained as files / in the page record). No
+  database.
+- **Linking**: **CamelCase** (`WikiWord`) auto-links by default; later added **free links**
+  `[[Like This]]`. This is the canonical CamelCase-naming lineage (UC-25).
+- **Open editing**, recent-changes, simple markup — the c2 ethos in a portable script.
+
+## 2. Lineage
+
+- **MediaWiki Phase I** *was* UseModWiki — early Wikipedia ran on it before the PHP rewrite
+  (Phase II/III). So UseModWiki is the **direct ancestor of MediaWiki/Wikibase** (T2) and a
+  sibling-root of the c2 tradition.
+- The **flat-file page+history model** here is the shape Oddmuse (UC-82), TWiki's file store
+  (UC-40), and others elaborate — confirming the **minimal file-store floor** is the field's
+  common origin, not a modern simplification.
+
+## 3. Capability profile
+
+Essentially **identical to the minimal floor** (UC-82, Oddmuse):
+
+| Dimension | UseModWiki |
+|-----------|------------|
+| Attachment mode | **file-store** (flat files under `db/`); CGI, no API |
+| Addressing | page = file; **CamelCase** name = identity |
+| Structure | flat page space; CamelCase link graph |
+| History | flat-file retained revisions (may be limited) |
+| Native query | none |
+| Translation | simple wiki markup → Markdown (lossy) |
+| Write granularity | page (file) |
+| Access | open editing (optional admin password) |
+| Provenance | timestamp, optional username |
+
+## 4. INTENT mapping
+
+- **Reinforces the minimal flat-file baseline** (UC-82): UseModWiki is the *historical*
+  instance of the graceful-degradation floor — attach via its flat files; partial history
+  surfaced honestly.
+- **CamelCase naming** (UC-25): the canonical source of WikiWord auto-linking — the page
+  model's name/identity and link-resolution must accommodate CamelCase-derived identities.
+- **Open wiki** (UC-01): the c2 open-editing ethos at the root.
+- **Lineage grounding**: confirms shard-wiki's "Git-based Markdown" page model descends from
+  (and must remain attach-compatible with) the flat-file ancestor.
+
+**No new UC** — UseModWiki adds historical grounding, not a new orchestration scenario;
+its capabilities are subsumed by UC-82 (minimal flat-file baseline) plus UC-25 (CamelCase).
+
+## 5. Architecture notes for SHARD-WP-0002
+
+- **T11:** UseModWiki = a second instance of the **minimal/floor profile** (with Oddmuse);
+  confirms the floor is the field's common root, so the floor profile is the right baseline.
+- **Naming/identity:** CamelCase-derived page identities (UC-25) are part of the legacy
+  identity surface the adapter must parse (and translate to the page model's identity).
+
+## 6. Open questions
+
+(None new — covered by UC-82 partial-history honesty, catalog open-Q30, and the c2 origins
+record. CamelCase resolution is UC-25.)
+
+## 7. Sources
+
+- UseModWiki — usemod.com/cgi-bin/wiki.pl (the wiki about itself); Wikipedia: *UseModWiki*,
+  *MediaWiki* (Phase I history)
+- prior: `research/260608-c2-wiki-origins/`; `research/260614-oddmuse-deep-dive/` (minimal
+  floor, UC-82)
+
+## 8. Traceability
+
+**No new UC** (reinforces UC-82). Enriched: UC-01, UC-40, UC-25, UC-36, UC-41. Lineage noted
+for the origins record. Architecture cross-ref: SHARD-WP-0002 T11 (minimal-profile lineage).

research/README.md

@@ -35,4 +35,5 @@ when multiple files or sources are involved. Findings here inform `spec/` and
 | 2026-06-14 | `260614-ikiwiki-deep-dive/` | ikiwiki — wiki compiler: git-canonical Markdown source → static HTML (derived publish/projection); git-distributed clone federation + XML-RPC pinger (third federation flavor); UC-79 |
 | 2026-06-14 | `260614-quip-deep-dive/` | Salesforce Quip — closed-SaaS live docs + embedded spreadsheets/live apps; REST + lossy HTML import/export; Salesforce enterprise ACL; external-API payload-format facet + inline-object page model; UC-80 |
 | 2026-06-14 | `260614-mojomojo-deep-dive/` | MojoMojo — Perl Catalyst/DBIx::Class DB-backed wiki; pages + history in SQL tables, no file store/API → direct-DB-read binding; DB version rows as history source; UC-81 |
-| 2026-06-14 | `260614-oddmuse-deep-dive/` | Oddmuse — single Perl CGI, plain-text `page/` files + `keep/` revisions, no DB; the minimal file-store floor / graceful-degradation baseline; partial-history honesty; UC-82 |
+| 2026-06-14 | `260614-oddmuse-deep-dive/` | Oddmuse — single Perl CGI, plain-text `page/` files + `keep/` revisions, no DB; the minimal file-store floor / graceful-degradation baseline; partial-history honesty; UC-82 |
+| 2026-06-14 | `260614-usemodwiki-deep-dive/` | UseModWiki — flat-file ancestor (Wikipedia's MediaWiki Phase I); CamelCase linking; lineage grounding for the minimal file-store floor; enrichment-only (reinforces UC-82, UC-25) |