Move field report to docs/history; refresh README repository layout

- docs/history/echo-improvements-prompt.md (ROADMAP-2.0 §5 box ticked)
- README repository layout brought to 1.5.1 reality: root docs
  (CHANGELOG/TODO-1.6/ROADMAP-2.0/docs/history), build.py + dist/
  (gitignored, secret-bearing), current eval harness contents, hooks/,
  and the full scripts/ roster (recall/reflect/triage/queue/
  concurrency/quality/output/doctor/hook modules) with the legacy
  commands/ dir annotated as the TODO-1.6 migration target. Also
  restores the eval-descriptor fix lost in the prior commit (edit was
  applied in memory but never written back).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -62,16 +62,26 @@ Vault paths are addressed **at the root** (e.g. `GET /vault/_agent/context/curre
 
 ```
 echo-v.05/
+├── README.md · CHANGELOG.md        ← this file + per-release change log
+├── TODO-1.6.md · ROADMAP-2.0.md    ← next-minor working list · packaging/structure major plan
+├── docs/history/                   ← historical inputs (e.g. the 1.5.0 frontmatter field report)
+├── build.py                        ← deterministic .plugin builder (--bake-key/--strip-key/--label/--outdir)
 ├── echo-memory.plugin              ← built, installable plugin (zip artifact, rebuilt on version bump)
-├── echo-memory-<version>.plugin    ← versioned build artifacts (history)
+├── echo-memory-<version>.plugin    ← versioned build artifacts (history; moves to Gitea releases in 2.0)
-├── eval/                           ← credential-free A/B eval harness (0.6 vs 0.7); not bundled
+├── dist/                           ← per-user baked artifacts (secret-bearing) — GITIGNORED, never committed
+├── eval/                           ← credential-free eval + test harness; not bundled
 │   ├── mock_olrapi.py              ← deterministic mock of the REST API + fault injection
-│   ├── run_eval.py                 ← orchestrator (runs the real echo.py vs modeled raw curl)
+│   ├── mock_olrapi_hifi.py         ← higher-fidelity mock (real PATCH heading/frontmatter semantics)
+│   ├── run_eval.py                 ← current-version metrics (retrieval / dedup / write-safety / durability)
+│   ├── test_*.py                   ← end-to-end suites (features, reflect, offline queue, PATCH semantics)
+│   ├── results/latest.json         ← machine-readable output of the last eval run
 │   └── README.md
-└── echo-memory.plugin.src/         ← tracked source tree (the plugin)
+└── echo-memory.plugin.src/         ← tracked source tree (the plugin — single canonical tree)
     ├── .claude-plugin/plugin.json  ← manifest (name, version, description)
     ├── README.md                   ← plugin-level README
-    ├── commands/                   ← slash commands: echo-load, echo-save, echo-recall, echo-triage, echo-health, echo-sweep, echo-reflect, echo-doctor
+    ├── hooks/hooks.json            ← session hooks: SessionStart auto-load · Stop reflection nudge
+    ├── commands/                   ← slash commands (legacy format; skills-format migration = TODO-1.6):
+    │                                 echo-load|save|recall|triage|health|sweep|reflect|doctor
     └── skills/echo-memory/
         ├── SKILL.md                ← operating procedure (authoritative)
         ├── references/
@@ -82,18 +92,27 @@ echo-v.05/
         │   ├── api-reference.md        ← REST endpoint patterns + routing map
         │   └── session-log-template.md
         ├── scripts/                    ← executable logic — pure Python (run: python3, or python / py -3)
-        │   ├── echo.py                 ← validated client + high-level CLI (capture/resolve/recall/link/load/scope/lock/config)
+        │   ├── echo.py                 ← validated client + CLI (capture/resolve/recall/link/triage/load/scope/lock/config/reflect/flush/doctor)
-        │   ├── echo_config.py          ← resolves owner/endpoint/key from the machine-local config (env-overridable)
+        │   ├── echo_config.py          ← owner/endpoint/key resolution (baked > env > machine-local config file)
-        │   ├── echo_index.py           ← entity index (registry, resolve, name->path map)
+        │   ├── echo_index.py           ← entity index + kind maps (KIND_STATUS/KIND_REQUIRED_FM) + duplicate-gate scoring
         │   ├── echo_links.py           ← cross-link primitives (Related parsing, bidirectional linking)
-        │   ├── echo_ops.py             ← high-level ops (capture, recall, resolve, link, agent-log)
+        │   ├── echo_ops.py             ← high-level ops (capture with dup-gate, resolve, link, agent-log)
+        │   ├── echo_recall.py          ← hybrid BM25 + graph recall over entities + sessions/journal (freshness/status priors)
+        │   ├── echo_reflect.py         ← session-reflection pipeline (validate/classify/preview/apply)
+        │   ├── echo_triage.py          ← one-tap inbox triage (reflect pipeline + processing-log audit)
+        │   ├── echo_queue.py           ← offline write-ahead outbox + last-known-good read cache
+        │   ├── echo_concurrency.py     ← advisory-lock context manager + atomic index updates
+        │   ├── echo_quality.py         ← auto-link confidence + slug-collision guards
+        │   ├── echo_output.py          ← --json result envelopes
+        │   ├── echo_doctor.py          ← one-call readiness check (/echo-doctor)
+        │   ├── echo_hook_session_start.py · echo_hook_stop.py  ← the session hooks (fail-safe)
         │   ├── routing.json            ← canonical machine-readable route manifest (linter enforces it)
-        │   ├── vault_lint.py           ← read-only invariant + graph-health checker (Vault Health)
+        │   ├── vault_lint.py           ← read-only invariant + graph-health + frontmatter-completeness checker
         │   ├── check_routing.py        ← verifies routing docs stay in sync with routing.json (offline)
-        │   ├── test_echo_client.py     ← offline regression tests + the routing-sync guard
+        │   ├── test_echo_client.py     ← offline unit tests + the routing-sync guard
         │   ├── bootstrap.py            ← deterministic, idempotent vault setup/repair
         │   ├── migrate.py              ← deterministic schema migration (dry-run by default)
-        │   └── sweep.py                ← bring an upgraded vault up to spec (build index + symmetrize links)
+        │   └── sweep.py                ← bring a vault up to spec (indexes + frontmatter backfill + link symmetrize)
         └── scaffold/                   ← verbatim files the bootstrap writes into the vault
             ├── echo-vault.md           ← bootstrap marker
             ├── README.vault.md         ← thin human signpost

ROADMAP-2.0.md

@@ -69,9 +69,8 @@ the README. Re-run it per release and refresh the README table.
 - [x] Retire `ROADMAP-1.0.md` (fully shipped; in git history) — **done 2026-07-03**.
 - [ ] Root README "Repository layout" section updated for the post-2.0 tree
       (no versioned zips, no codex tree, skills-only plugin).
-- [ ] Confirm `echo-improvements-prompt.md` (the 1.5.0 field report) either moves to a
+- [x] `echo-improvements-prompt.md` (the 1.5.0 field report) moved to `docs/history/`
-      `docs/history/` folder or is deleted — its content is preserved in
+      — **done 2026-07-03**.
-      CHANGELOG 1.5.0 and the git history.
 
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