diff --git a/docs/README.md b/docs/README.md
new file mode 100644
index 0000000..eb2fad1
--- /dev/null
+++ b/docs/README.md
@@ -0,0 +1,38 @@
+---
+created: 2026-05-11
+last_modified: 2026-05-11
+revisions: 0
+doc_type: [REFERENCE]
+---
+
+# m-standard — Documentation Index
+
+> First-pass index generated 2026-05-11. Labels follow the shared vocabulary below; the same vocabulary is used across all m-dev-tools repos.
+
+## Vocabulary
+
+Each doc is labeled `[TYPE · type? · connection · connection?]`.
+
+**Types** — `HISTORY` · `ARCHITECTURE` · `DESIGN` · `ADR` · `SPEC` · `REFERENCE` · `GUIDE` · `TUTORIAL` · `ROADMAP` · `PLAN` · `RESEARCH` · `SURVEY` · `GAP-ANALYSIS` · `STATUS` · `EXPLAINER` · `NOTES` · `WORKED-EXAMPLE` · `SETUP` · `INTEGRATION` · `PROPOSAL` · `BUILD-LOG` · `CHANGELOG` · `POSTMORTEM`
+
+**Repo connections** — `history` · `function` · `design` · `architecture` · `planning` · `implementation`
+
+## Top-level
+
+- **`spec.md`** — `[SPEC · architecture · design]` Formal v0.2 specification of the project: sources reconciled, output contract, repo layout, milestones, success criteria.
+- **`m-standards-guide.md`** — `[GUIDE · REFERENCE · function]` Human-readable narrative reference to M drawn from the integrated layer, with every claim citing a TSV row.
+- **`pragmatic-m-standard.md`** — `[EXPLAINER · REFERENCE · function]` Explains the portable YDB-IRIS intersection subset (81 entries) and why pragmatic differs from operational and wise.
+- **`va-sac-and-pragmatic-standard.md`** — `[EXPLAINER · function · design]` Layers VA SAC, pragmatic, and operational standards, defining the 58-entry intersection a VistA developer can actually use.
+- **`objectscript-analysis.md`** — `[RESEARCH · function]` Opinionated analysis of IRIS ObjectScript as a superset of M, explaining why it sits outside the operational standard.
+- **`m-libraries-survey.md`** — `[SURVEY · GAP-ANALYSIS · function]` Comprehensive descriptive survey of the M-language standard library across ANSI, IRIS, and YottaDB with rank-ordered gaps.
+- **`m-libraries-remediation.md`** — `[PLAN · ROADMAP · planning]` Prioritised build plan turning the survey's gaps into the `m-stdlib` sibling project, with phases and toolchain prerequisites.
+- **`build-log.md`** — `[BUILD-LOG · history · implementation]` Chronological `BL-NNN` log of non-trivial issues, decisions, and surprises encountered while constructing the pipeline.
+
+## `adr/` — Architecture Decision Records governing the reconciliation pipeline
+
+- **`adr/001-two-source-hierarchy.md`** — `[ADR · architecture · design]` Reconcile AnnoStd and YottaDB under a fixed precedence hierarchy, excluding GT.M as no longer pinnable.
+- **`adr/002-normative-vs-annotation-separation.md`** — `[ADR · design · architecture]` Separate AnnoStd's normative standard text from committee annotations so consumers cannot confuse commentary with the standard.
+- **`adr/003-per-source-preservation.md`** — `[ADR · architecture · design]` Preserve raw per-source TSVs as first-class artifacts alongside the reconciled integrated view to keep extraction reproducible.
+- **`adr/004-tsv-plus-json-output.md`** — `[ADR · architecture · function]` Publish every concept family as both flat TSV (for analysts) and structured JSON (for code generators) from a single emitter.
+- **`adr/005-build-time-consumability.md`** — `[ADR · architecture · function]` Treat the integrated layer as a machine-readable interface with pinned `schema_version`, locked column order, and JSON Schema gates.
+- **`adr/006-iris-as-third-source.md`** — `[ADR · architecture · design]` Add InterSystems IRIS as a third primary source in v0.2, revising ADR-001's two-source framing for the VistA use case.
diff --git a/docs/adr/001-two-source-hierarchy.md b/docs/adr/001-two-source-hierarchy.md
index 474fcff..b613192 100644
--- a/docs/adr/001-two-source-hierarchy.md
+++ b/docs/adr/001-two-source-hierarchy.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-001 — Two-source hierarchy with explicit precedence
 
 **Status:** accepted (v0.1)
diff --git a/docs/adr/002-normative-vs-annotation-separation.md b/docs/adr/002-normative-vs-annotation-separation.md
index d6c0522..8d31721 100644
--- a/docs/adr/002-normative-vs-annotation-separation.md
+++ b/docs/adr/002-normative-vs-annotation-separation.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-002 — Separate normative text from annotations
 
 **Status:** accepted (deferred for v1.0; see Implementation status below)
diff --git a/docs/adr/003-per-source-preservation.md b/docs/adr/003-per-source-preservation.md
index 0ca9f41..c677dea 100644
--- a/docs/adr/003-per-source-preservation.md
+++ b/docs/adr/003-per-source-preservation.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-003 — Per-source preservation alongside integrated output
 
 **Status:** accepted (v0.1)
diff --git a/docs/adr/004-tsv-plus-json-output.md b/docs/adr/004-tsv-plus-json-output.md
index 58679f9..0e073e8 100644
--- a/docs/adr/004-tsv-plus-json-output.md
+++ b/docs/adr/004-tsv-plus-json-output.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-004 — Dual output format: TSV flat facts + JSON structured detail
 
 **Status:** accepted (v0.1)
diff --git a/docs/adr/005-build-time-consumability.md b/docs/adr/005-build-time-consumability.md
index e6d806c..fd744c4 100644
--- a/docs/adr/005-build-time-consumability.md
+++ b/docs/adr/005-build-time-consumability.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-005 — Designed to be code-generated against
 
 **Status:** accepted (v0.1)
diff --git a/docs/adr/006-iris-as-third-source.md b/docs/adr/006-iris-as-third-source.md
index 85f860c..51d1cee 100644
--- a/docs/adr/006-iris-as-third-source.md
+++ b/docs/adr/006-iris-as-third-source.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 1
+doc_type: [ADR]
+---
+
 # ADR-006 — Add InterSystems IRIS as a third primary source
 
 **Status:** accepted (v0.2)
diff --git a/docs/build-log.md b/docs/build-log.md
index fb16382..b2feda1 100644
--- a/docs/build-log.md
+++ b/docs/build-log.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-05-09
+revisions: 9
+doc_type: [BUILD-LOG]
+---
+
 # Build log
 
 Chronological record of non-trivial issues encountered during
diff --git a/docs/m-libraries-remediation.md b/docs/m-libraries-remediation.md
index fe4e78c..1cc66cc 100644
--- a/docs/m-libraries-remediation.md
+++ b/docs/m-libraries-remediation.md
@@ -8,6 +8,10 @@ adjacent-projects:
   - tree-sitter-m (grammar, VS Code extension)
   - m-standard (this repo — provenance, schemas, conflicts)
   - m-tools (legacy reference, ^TESTRUN assertion library)
+created: 2026-04-30
+last_modified: 2026-05-09
+revisions: 3
+doc_type: [PLAN, ROADMAP]
 ---
 
 # M libraries — remediation strategy and prioritised roadmap
diff --git a/docs/m-libraries-survey.md b/docs/m-libraries-survey.md
index 6cc8c40..a69576c 100644
--- a/docs/m-libraries-survey.md
+++ b/docs/m-libraries-survey.md
@@ -14,6 +14,10 @@ derived-from:
   - integrated/pattern-codes.tsv
   - integrated/multi-vendor-extensions.tsv
   - integrated/conflicts.tsv
+created: 2026-05-09
+last_modified: 2026-05-09
+revisions: 1
+doc_type: [SURVEY, GAP-ANALYSIS]
 ---
 
 # M libraries — comprehensive survey across ANSI, IRIS, and YottaDB
diff --git a/docs/m-standards-guide.md b/docs/m-standards-guide.md
index 2562772..014fbcc 100644
--- a/docs/m-standards-guide.md
+++ b/docs/m-standards-guide.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 2
+doc_type: [GUIDE, REFERENCE]
+---
+
 # M-Standards-Guide
 
 A human-readable reference to the M (MUMPS) programming language, drawn
diff --git a/docs/objectscript-analysis.md b/docs/objectscript-analysis.md
index fb5c0a2..def90d8 100644
--- a/docs/objectscript-analysis.md
+++ b/docs/objectscript-analysis.md
@@ -3,6 +3,10 @@ title: ObjectScript — what it is, where it stands, and what could replace it
 status: analytical guide (not part of the Operational M Standard)
 last-reviewed: 2026-04-29
 sources: sources/iris/site/ (InterSystems IRIS Data Platform 2026.1 docs)
+created: 2026-05-09
+last_modified: 2026-05-09
+revisions: 1
+doc_type: [RESEARCH]
 ---
 
 # ObjectScript — what it is, where it stands, and what could replace it
diff --git a/docs/pragmatic-m-standard.md b/docs/pragmatic-m-standard.md
index 31eb69c..4a9852e 100644
--- a/docs/pragmatic-m-standard.md
+++ b/docs/pragmatic-m-standard.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 2
+doc_type: [EXPLAINER, REFERENCE]
+---
+
 # The Pragmatic M Standard
 
 > **What "pragmatic" means here.** Strictly: *portable across YottaDB
diff --git a/docs/spec.md b/docs/spec.md
index 730e451..00d51e0 100644
--- a/docs/spec.md
+++ b/docs/spec.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-23
+last_modified: 2026-04-25
+revisions: 6
+doc_type: [SPEC]
+---
+
 # m-standard — Specification v0.2
 
 **Status:** draft for review
diff --git a/docs/va-sac-and-pragmatic-standard.md b/docs/va-sac-and-pragmatic-standard.md
index 648d3b7..d94b9d5 100644
--- a/docs/va-sac-and-pragmatic-standard.md
+++ b/docs/va-sac-and-pragmatic-standard.md
@@ -1,3 +1,10 @@
+---
+created: 2026-04-25
+last_modified: 2026-04-25
+revisions: 3
+doc_type: [EXPLAINER]
+---
+
 # VA SAC, the Pragmatic M Standard, and the Operational Subset
 
 Three M standards layer over each other for VistA development. They