chore(release): 0.16.0

[MANVENDRA-github]

Why now

$ git rev-list --count v0.15.0..main
19
$ grep -c '^## \[Unreleased\]' CHANGELOG.md
0

Nineteen commits since v0.15.0, none of them in the changelog — which opens by claiming "All notable changes to agentry are documented here" and cites Keep a Changelog.

Two of the nineteen are real defects. Anyone cloning at the v0.15.0 tag still has both:

• syncCursor deletes every file the user keeps in .cursor/, including .cursor/environment.json
• protect-generated-dirs never guarded .opencode/, whose three subdirectories are wiped on every sync

Why minor, not patch

Sync's wipe behavior changed, package.json is now private with derived plugin-manifest metadata, and the suite went 98 → 243.

This bump is one commit — it used to take two

The old flow was chore(release): X (bump package.json) → docs(changelog) → chore(sync): regenerate harness outputs for X, because scripts/sync-harnesses.js held its own copy of the version. Only that last commit was sync-clean, so only that one could be tagged — the trap that made back-filling v0.12–v0.14 fail until each release's true tip was found.

PR #29 made package.json the single source. Bumping it now carries the manifest automatically:

$ node -e "...version='0.16.0'..." && npm run sync
package.json: 0.16.0
plugin.json:  0.16.0   <- followed, no second edit

So the release commit is itself sync-clean, and release.yml's determinism gate passes on it. Verified:

$ npm run sync && git status --porcelain
(empty)

Verification

$ npm run lint   # PASS
$ npm test       # 243 pass, 0 fail
$ npm run sync   # clean, no drift

# release.yml extracts notes with this exact awk — it must find the section:
$ awk -v ver="0.16.0" 'index($0,"## [" ver "]")==1{g=1;print;next} ...' CHANGELOG.md | wc -l
39

README's status line moves to v0.16.0. Its one other mention of 0.15.0 is historical ("the v0.15.0 batch came from auditing the corpus") and stays.

After merge

Tag the merge commit v0.16.0 and push it. release.yml gates on sync-determinism + lint + tests, extracts the section above, and cuts the GitHub Release.