docs: the map, a fresh index, and a register of dead ideas and revised claims

docs/CLAUDE.md Phase 1 output, after the reorganisation.

- docs/README.md: rewritten as the map -- where each kind of document
  lives, which one to believe (CLAUDE.md, FABRIC, v4.0.0, reference/,
  BRINGUP, code), how to retire a document.
- docs/INDEX.md: regenerated from the tracked tree, 489 rows, every
  document with a status (the 2026-06-16 snapshot was stale).
- docs/DEAD-AND-REVISED.md (new): what was abandoned (L4Re, the hal_*
  contract, ACL RWT, the Hermes VM, elevation, the knowledge factor, ...)
  and what was corrected (ACL overhead, versions, block rules, parity
  baseline, ...), each with its date and record.
- docs/DELETE-CANDIDATES.md: 12 duplicates, awaiting a ruling; nothing
  deleted.
- CLAUDE.md: versions corrected (3.2.0 / 2.1.0).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/working/archive/README.md

@@ -4,6 +4,20 @@ Historical, superseded, and obsolete records — kept for reference, not for
 current guidance. Each subdirectory carries a provenance comment noting its
 pre-reorg path and already has its own `README.md`.
 
+Since the 2026-10-14 docs triage, three folders sort what is filed here by *why* it is no
+longer current; each file in them starts with a header saying what it is and where to look
+instead (and `docs/DEAD-AND-REVISED.md` keeps the register):
+
+- **[historical/](historical/)** — finished work, accurate for its time: session plans, audits,
+  fix write-ups, the birthing plan, the January architecture draft. Dated names.
+- **[superseded/](superseded/)** — replaced by something named in its header: the Hermes-VM
+  Tripod docs and designs (now FABRIC-3.5/3.6), the StarForth-era roadmap, documents already
+  flagged superseded or obsolete.
+- **[dead/](dead/)** — ideas abandoned or never adopted: the `hal_*` target contract, L4Re,
+  the metrics-and-knobs gap list.
+
+The older folders, from the 2026-06-16 reorganisation:
+
 - **[legacy/](legacy/)** — The former top-level `docs/archive/` tree,
   including `phase-1/` peer-review submission material.
 - **[operations/](operations/)** — The former `docs/05-operations/`: CI/CD,