chore(release): 3.4.1

[igorls]

Release 3.4.1

Bumps the version across all six version sources (the five version-guard.yml checks plus the README badge that tests/test_readme_claims.py enforces) and promotes the [Unreleased] changelog to ## [3.4.1].

Supersedes #1808, which was opened on a release/* branch. That name matches a repository ruleset (pull_request + non_fast_forward) that blocks follow-up commits, so the branch couldn't take review fixes. This PR is on an unprotected branch and folds in the review feedback.

Version sources bumped 3.4.0 → 3.4.1

• mempalace/version.py (source of truth)
• pyproject.toml
• .claude-plugin/marketplace.json
• .claude-plugin/plugin.json
• .codex-plugin/plugin.json
• README.md version badge
• uv.lock (editable package entry)

Shipping in 3.4.1

Features

• Cursor IDE plugin (.cursor-plugin/)
• Cursor IDE hook support (stop / preCompact / sessionStart)
• First-class Antigravity IDE support (+ zero-config interpreter resolution)

Bug fixes

• embeddinggemma bulk re-embed OOM fix
• Backup-retention pruning (max_backups)

CHANGELOG link block — fully rebuilt

The compare-link reference block had been abandoned at v3.2.0, leaving the [3.3.0]–[3.3.6] and [3.4.0] headers as broken/unclickable links (flagged in review on #1808). This PR rebuilds the full chain: every version header from [3.0.0] to [3.4.1] now resolves to a compare link, and [Unreleased] points at v3.4.1...HEAD.

Pre-existing issue still open (out of scope)

3.4.0 never got its own CHANGELOG section body — only its compare-link is restored here. The section text remains undocumented; worth a follow-up if you want the history complete.

Validation

• All six version sources agree (replicated version-guard.yml locally — green)
• Entry-point alignment check (RELEASING.md) — mempalace-mcp consistent across manifests
• ruff check + ruff format --check — clean
• Full suite: 2853 passed, 5 skipped

After merge (manual, per docs/RELEASING.md)

Merge develop → main, then draft a GitHub Release targeting main with tag v3.4.1 to trigger publish.yml (PyPI Trusted Publishing, manual approval on the pypi environment).

[gemini-code-assist]

Code Review

This pull request bumps the project version from 3.4.0 to 3.4.1 across multiple configuration files, plugin manifests, the changelog, and documentation. I have no feedback to provide on these changes.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[Copilot]

Pull request overview

This PR prepares the 3.4.1 release by synchronizing the project version across all declared version sources and updating the changelog to publish the previously “Unreleased” notes as 3.4.1, including a rebuilt compare-link reference block.

Changes:

• Bump version from 3.4.0 → 3.4.1 across Python package metadata, lockfile, README badge, and plugin manifests.
• Promote the changelog to ## [3.4.1] — 2026-06-14 and update [Unreleased] to compare from v3.4.1.
• Rebuild/extend the CHANGELOG compare-link reference chain through 3.4.1 (including restoring 3.4.0 and the 3.3.x chain).

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
mempalace/version.py	Updates single-source-of-truth __version__ to 3.4.1.
pyproject.toml	Bumps project version to 3.4.1.
uv.lock	Updates the editable mempalace package entry version to 3.4.1.
README.md	Updates the version badge URL to 3.4.1.
CHANGELOG.md	Promotes release notes to 3.4.1, updates [Unreleased] compare target, and rebuilds compare-link references.
.claude-plugin/plugin.json	Bumps plugin manifest version to 3.4.1.
.claude-plugin/marketplace.json	Bumps marketplace manifest version to 3.4.1.
.codex-plugin/plugin.json	Bumps plugin manifest version to 3.4.1.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.