[MarkusNeusinger]

Summary

• Cuts v4.0.0 — Your data: the release that opens the agent chat ("Use with my data") to every visitor, as an experimental feature (public lane since 2026-11-02).
• Folds the 22 changelog fragments into the section, bumps pyproject.toml, uv.lock and app/package.json to 4.0.0, and adds the two hand-written aggregate lines: the Dependencies bullet (13 Dependabot PRs) and the Catalog line (three funnel-basic regenerations, one stored re-score).
• Major version per the release plan: v4.0.0 was reserved for the public launch of the agent chat.

Plan

agentic/commands/release.md. After the merge: tag v4.0.0 on the merge commit (Your data (2026-11-03)), then the condensed GitHub release.

Test plan

• uv run python -m tools.changelog check --base origin/main
• uv lock --check
• tests/unit/test_version_sync.py
• CI green

[Copilot]

🔵 Needs a closer look

The major public agent-chat launch includes security/IAM and Cloud Run changes while CI remains unchecked, so the release-only diff cannot verify the deploy trigger, generated lockfile, post-deploy smoke checks, or live public lane.

No open issues 🎉

What changed in this PR

This pull request prepares the v4.0.0 “Your data” release, documenting the public experimental agent chat launch, consolidating changelog fragments, and synchronizing project versions.

Changes:

• Adds the v4.0.0 release notes and comparison links.
• Consolidates and removes 22 consumed changelog fragments.
• Bumps versions to 4.0.0 in pyproject.toml, uv.lock, and app/package.json.

This pull request is too complex or risky for automated approval.

File	Description
uv.lock	Synchronizes the locked project version to 4.0.0.
pyproject.toml	Bumps the Python project version to 4.0.0.
CHANGELOG.md	Adds the v4.0.0 release notes, aggregate summaries, and comparison links; two documentation consistency nits remain.
changelog.d/​validator-function-type.md	Removes consumed validator security and CI entries.
changelog.d/​use-my-data-entry.md	Removes consumed agent entry-point entries.
changelog.d/​stale-library-counts.md	Removes consumed documentation correction entries.
changelog.d/​readme-showcase.md	Removes consumed README and project overview entries.
changelog.d/​readme-agent-live.md	Removes consumed public-agent documentation entries.
changelog.d/​legal-page-short.md	Removes consumed legal and transparency entries.
changelog.d/​debug-daily-usage.md	Removes consumed usage and service-budget entries.
changelog.d/​api-dedicated-service-account.md	Removes the consumed API service-account entry.
changelog.d/​agents-warm-instance.md	Removes consumed warm-instance and render-cancellation entries.
changelog.d/​agent-public-page.md	Removes consumed public agent-page and feedback entries.
changelog.d/​agent-public-lane.md	Removes consumed public-lane and feedback-security entries.
changelog.d/​agent-plot-switch-server.md	Removes consumed server-side plot-switching entries.
changelog.d/​agent-plot-switch-page.md	Removes consumed plot-switching UI entries.
changelog.d/​agent-plot-switch-chat.md	Removes consumed chat library-switching entries.
changelog.d/​agent-month-year-dates.md	Removes consumed date-conversion and parsing entries.
changelog.d/​agent-index-column-left.md	Removes consumed row-number and data-view entries.
changelog.d/​agent-example-data.md	Removes consumed generated-example-data entries.
changelog.d/​agent-data-grid.md	Removes the consumed data-grid feature entry.
changelog.d/​agent-combined-requests.md	Removes consumed combined-request entries.
changelog.d/​agent-chat-declutter.md	Removes consumed agent-chat layout entries.
changelog.d/​agent-admin-lane.md	Removes consumed admin-lane and queue entries.
changelog.d/​adk-2-13-pandas-3-1.md	Removes consumed dependency compatibility entries.
app/​package.json	Bumps the frontend version to 4.0.0.

_{Review effort: Lite}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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