Follow papa-hq's research convention; the mesh links nothing

Research efforts move from status.md to 00-overview.md with active /
graduated / abandoned, matching papa-hq so the two repositories read the
same way. Playbooks, skills, README and the ledger follow.

Reverses yesterday's withdrawal of the symlink note in GENESIS. The note
was right and the withdrawal was wrong: the intent is that the mesh
creates no symlinks at all, so a founding document listing "symlinks, not
copies" as a design principle does point the opposite way from where this
is going, and that is a contradiction rather than a stale detail.

ADR 0018 records the position, proposed. ADR 0011 stays as it is — it is
the historical decision and the incident behind it is why anyone believes
either record — and is superseded in intent, not edited. Its one
editorial line, which called the wider reading false, is corrected to
state what is actually true: centralising who may link narrowed the
incident class without closing it, because a link the installer makes
resolves exactly like one made by hand.

The argument that kept linking was staleness. ADR 0004 removed it: every
managed file is already derived and reconciled, so a copy is the natural
form and a pointer into source is the shape the mesh's own model forbids
everywhere else. What is not settled, and is marked open, is how
staleness gets detected — which is the decision that makes or breaks it.

.claude/skills/hal-graduate/SKILL.md

@@ -19,7 +19,7 @@ it; this skill adds only the scaffolding.
    not recovered. Record the rejected options.
 3. **Write the design** under `02-DESIGN/01-to-be/` with `layer: to-be`, `status: designed`,
    empty `code:`, today's `updated:`, and `decisions:` pointing at the record.
-4. **Close the effort** — the research `status.md` gets `status: graduated` and `became:`
+4. **Close the effort** — the research `00-overview.md` gets `status: graduated` and `became:`
    pointing at both.
 5. **Add the ledger line** to `DECISIONS.md` under today's heading.
 

.claude/skills/hal-new-research/SKILL.md

@@ -14,12 +14,12 @@ this skill only does the mechanical setup.
 1. Find the next free number: list `01-RESEARCH/NNN-*`, take the highest plus one, zero-padded
    to three digits.
 2. Create `01-RESEARCH/NNN-descriptive-name/` (kebab-case from the topic).
-3. Create `status.md` in it with exactly this frontmatter, then a prose summary of **what** is
+3. Create `00-overview.md` in it with exactly this frontmatter, then a prose summary of **what** is
    being investigated, **why**, and **what it touches**:
 
    ```yaml
    ---
-   status: ongoing
+   status: active
    initiated: YYYY-MM-DD
    touches: []
    became: []

.claude/skills/hal-status/SKILL.md

@@ -13,7 +13,7 @@ generated on demand and never written back to disk.
 
 | Section | Files | Frontmatter |
 |---|---|---|
-| Research | `01-RESEARCH/NNN-*/status.md` | `status` (`ongoing` / `graduated` / `abandoned`), `initiated`, `touches`, `became` |
+| Research | `01-RESEARCH/NNN-*/00-overview.md` | `status` (`active` / `graduated` / `abandoned`), `initiated`, `touches`, `became` |
 | Design | `02-DESIGN/**/*.md` (not READMEs) | `layer` (`as-is` / `to-be`), `status` (`designed` / `in-progress` / `implemented` / `abandoned`), `code`, `updated`, `decisions` |
 | Decisions | `adr/NNNN-*.md` | `status` (`proposed` / `accepted` / `superseded`), `date`, `deciders`, `reconstructed`, `superseded-by`, `extends` |
 | Issues | `04-ISSUES/NNN-*/00-report.md` | `status` (`open` / `diagnosing` / `located` / `resolved` / `wontfix`), `opened`, `located-in`, `fixed-by`, `amended-design` |