2.0.0 — packaging & structure major: skills-only plugin, release-based artifacts

Memory behavior unchanged; the major signals a distribution/install break.

- Legacy commands/ directory DELETED (skills-only; the 1.6.0 skills were verified
  on desktop + CoWork and already took precedence). Pre-skills clients install
  1.6.0 from the release history.
- Artifact policy: the repo tracks only the echo-memory.plugin pointer; the 15
  historical versioned zips leave the tree (git history retains them); versioned
  builds ship as Gitea release assets, one release per v<version> tag, starting
  v2.0.0. .gitignore: *.plugin except the pointer.
- README: post-2.0 repository layout; "packaging for other agent runtimes" note
  (ports are build targets from the canonical tree, never a second source tree).
- ROADMAP-2.0 items ticked; manifest -> 2.0.0.

All suites green (25/25 unit + 4 e2e suites); artifact rebuilt skills-only
(79 entries, no commands/).

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

ROADMAP-2.0.md

@@ -20,12 +20,12 @@ The repo root tracks every historical build (`echo-memory-0.6.0.plugin` …
 `echo-memory-1.5.1.plugin`) plus the `echo-memory.plugin` pointer. 2.0 changes the
 policy — **breaking for anyone who pulls artifacts straight from the repo**:
 
-- [ ] Track only `echo-memory.plugin` (the current installable); delete the versioned
-      zips from the tree.
-- [ ] Publish versioned builds as **Gitea releases** on `git.alwisp.com/jason/echo`
-      instead (one release per tag, artifact attached).
-- [ ] `.gitignore`: `*.plugin` except the pointer.
-- [ ] Tag releases going forward (`v2.0.0`, …) so the release page is the version
+- [x] Track only `echo-memory.plugin` (the current installable); delete the versioned
+      zips from the tree — **done 2.0.0** (15 zips removed; history keeps them).
+- [x] Publish versioned builds as **Gitea releases** on `git.alwisp.com/jason/echo`
+      instead (one release per tag, artifact attached) — **v2.0.0 onward**.
+- [x] `.gitignore`: `*.plugin` except the pointer — **done 2.0.0**.
+- [x] Tag releases going forward (`v2.0.0`, …) so the release page is the version
       history for artifacts, and the README table stays the narrative history.
 
 ## 2. Complete the skills-format migration (finishes the 1.6 work)
@@ -33,10 +33,11 @@ policy — **breaking for anyone who pulls artifacts straight from the repo**:
 1.6 migrates the eight slash commands to `skills/*/SKILL.md` with both formats
 coexisting (see `TODO-1.6.md`). 2.0 finishes it:
 
-- [ ] **Delete the legacy `commands/` directory** — the packaging break that partly
-      motivates the major bump.
-- [ ] Re-verify desktop + CoWork installs of the skills-only artifact.
-- [ ] Update SKILL.md / README / command docs that reference `commands/`.
+- [x] **Delete the legacy `commands/` directory** — **done 2.0.0** (1.6.0's install
+      verification on both surfaces cleared the gate; skills had precedence anyway).
+- [ ] Re-verify desktop + CoWork installs of the skills-only artifact (operator step,
+      post-2.0.0-install).
+- [x] Update SKILL.md / README / command docs that reference `commands/` — **done 2.0.0**.
 
 ## 3. Codex packaging (from MAINTENANCE › Canonical source tree)
 
@@ -47,9 +48,9 @@ regenerated after 2.0 if needed). What remains for 2.0:
 - [ ] If Codex support returns: implement it as a **build target** generated from the
       canonical `echo-memory.plugin.src/` tree (`build.py --target codex` or similar) —
       never as a second hand-maintained source tree (that's how the drift happened).
-- [ ] Otherwise: a short "packaging for other agent runtimes" note in the README
+- [x] Otherwise: a short "packaging for other agent runtimes" note in the README
       documenting what a Codex/other-runtime port needs (manifest shape, skill entry
-      point, script invocation).
+      point, script invocation) — **done 2.0.0** (README › after Repository layout).
 
 ## 4. Eval refresh — publish current-version metrics (from MAINTENANCE › Docs freshness; ROADMAP-1.0 H4 leftover) — ✅ DONE
 
@@ -67,8 +68,8 @@ the README. Re-run it per release and refresh the README table.
 ## 5. Repo hygiene odds & ends
 
 - [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).
+- [x] Root README "Repository layout" section updated for the post-2.0 tree
+      (no versioned zips, no codex tree, skills-only plugin) — **done 2.0.0**.
 - [x] `echo-improvements-prompt.md` (the 1.5.0 field report) moved to `docs/history/`
       — **done 2026-07-03**.