Write Release Notes

Produce a concise summary of work merged to origin/main. Two modes:

• Release mode — summarize one Sculptor release (commits between the prior release tag and this release's tag or branch). Use when cutting or promoting a release.
• Date-range mode — summarize work landed in a date window. Use for weekly status updates.

In both modes, produce two outputs in the same message:

1. Internal release notes — the full categorized breakdown (Features, UI Polish, Testing, CI, Cleanup). For engineers and the team.
2. User-facing release notes — a shorter, curated view (What's new, Improvements, Reliability) scoped to changes a typical user will notice.

The user-facing view is derived from the internal one by filtering and regrouping; it is not a separate analysis pass.

Input

Argument: $ARGUMENTS

Mode detection:

• If the argument matches \d+\.\d+(\.\d+)? (optionally prefixed with v), treat it as a release version. Examples: 0.27, 0.27.0, v0.27.
• Otherwise, treat it as a date range.
• If no argument is provided, default to date-range mode with the last 7 days (relative to today's date).

Step 1: Resolve the commit range

Release mode

Normalize the version to X.Y.0 (e.g., 0.27 → 0.27.0).

Fetch tags first:

git fetch origin --tags --quiet

Endpoint (tip of this release):

• If sculptor-v{X.Y.0} tag exists, use it (release was promoted).
• Else if origin/release/sculptor-v{X.Y.0} branch exists, use that (release is still in flight on RCs).
• Else, abort and tell the user the release hasn't been cut yet.

git rev-parse --verify sculptor-v{X.Y.0} 2>/dev/null \
  || git rev-parse --verify origin/release/sculptor-v{X.Y.0} 2>/dev/null

Start point (prior release tag, exclusive):

git tag -l 'sculptor-v*' | grep -v rc | sort -V

Pick the highest tag whose version is strictly less than X.Y.0. That's the prior release. Don't assume X.Y-1 — version numbers can skip (e.g., 0.18 → 0.20, 0.22 → 0.24).

The range is <prev_tag>..<endpoint>. Example for 0.27 in flight: sculptor-v0.26.0..origin/release/sculptor-v0.27.0.

Date-range mode

Parse the argument into a start date and end date (both inclusive). Examples:

• Feb 14-23 means Feb 14 through Feb 23
• Feb 14 - Feb 23 means Feb 14 through Feb 23
• last 7 days means 7 days ago through today
• last week means 7 days ago through today
• 2026-02-14 2026-02-23 means Feb 14 through Feb 23

If the input is ambiguous, ask the user to clarify.

Step 2: Fetch merge commits

What matters for release notes is when work landed on main (became available to users), not when the developer authored the commits. Use merge commits to determine this, since this repo uses a no-fast-forward merge strategy — every MR creates a merge commit.

Release mode

git fetch origin --quiet
git log <prev_tag>..<endpoint> --merges --first-parent --format="%h %s"

--first-parent follows only the main / release-branch spine, so you get exactly the MR-level merge commits that landed (no internal merges from inside any single MR's history).

Then, to get individual commits for context (needed for categorization):

git log <prev_tag>..<endpoint> --no-merges --format="%h %s"

Date-range mode

git fetch origin main --quiet
git log origin/main --merges --after="<start-date>T00:00:00" --before="<end-date>T23:59:59" --format="%h %s"

Use the actual start and end dates with explicit times — T00:00:00 for the start and T23:59:59 for the end — so the range is inclusive on both sides. Do NOT use the "offset by one day" trick with date-only strings; git's approxidate parser handles bare dates inconsistently and will include commits outside the intended range.

For merge commits, the author date equals the merge time, so --after/--before filtering is accurate.

Then, to get the detailed individual commits for each MR (needed for categorization), run:

git log origin/main --no-merges --after="<start-date>T00:00:00" --before="<end-date>T23:59:59" --format="%h %s"

Source-of-truth rule (both modes)

Use the merge commit list as the source of truth for what's included — if individual commits appear in the --no-merges output but their MR's merge commit is outside the chosen range, exclude them. Conversely, if a merge commit is in range but some of its individual commits have author dates outside the range, still include that work.

If the output is very large, save it to a temporary file and read it with the Read tool.

Step 3: Categorize commits

Read every commit message and sort each commit into exactly one of these categories:

Features

New user-facing capabilities, new API endpoints, new UI components, new backend services, new integrations. A feature is something that adds functionality that didn't exist before.

UI Polish

Bug fixes, visual tweaks, UX improvements, performance optimizations, and behavioral fixes to existing features. If a commit fixes, polishes, or improves something that already existed, it goes here — not in Features.

Testing

New test suites, test infrastructure, test migration, flaky test fixes, regression tests, test utilities, test skills. Anything whose primary purpose is improving test coverage or test reliability.

CI

CI pipeline changes, build system changes, CI job additions/removals, CI worker configuration, CI-specific fixes.

Cleanup

Dead code removal, refactoring with no behavior change, dependency removal, code quality sweeps, migration cleanup, removing deprecated features.

Categorization guidelines

• A commit that adds a new feature AND its tests goes in Features (the tests are part of the feature).
• A commit that adds tests for an existing feature goes in Testing.
• New test infrastructure, test tooling, or test frameworks go in Testing — even if built from scratch — because their purpose is testing, not user-facing functionality.
• A commit that fixes a bug goes in UI Polish, not Features.
• A commit that removes a feature entirely goes in Cleanup.
• Design docs and implementation plans go in Features (they're part of a feature's delivery).
• If a commit truly doesn't fit any category, include it in the closest match.

Step 4: Consolidate and summarize

Within each category, group related commits into single line items. For example, 15 commits for "Cmd+F Chat Search" become one bullet point, not 15.

Sort items within each category by significance — most impactful first. Rank by a mix of: (a) how many users it affects daily, (b) whether it's a new capability vs. an incremental improvement, and (c) architectural significance. User-facing workflow changes rank above infrastructure; foundational-but-invisible work ranks last.

Each bullet point must be:

• 10 words or fewer
• Formatted as: • *Label:* concise description
• The label is a short feature/area name (2-4 words)
• The description completes the thought

Good example:

• *Cmd+F Chat Search:* In-chat find with highlighting, navigation, and scroll

Bad example (too long):

• *Cmd+F Chat Search:* Implemented in-chat find functionality with CSS Custom Highlight API for match rendering, next/prev navigation with scroll-to-match, auto-expand of collapsed tool calls, and extensive polish

Step 5: Build the user-facing view

The user-facing view is a curated subset of the internal list, regrouped into three sections. Start from the internal categories you already produced — don't re-analyze the commits.

Sections

What's new Genuinely new capabilities or new default behaviors — things users couldn't do before, or that they now do differently by default. Usually 0–2 bullets per release. Omit the section if nothing qualifies.

Improvements Polish to features that already worked: visible UX wins, performance, clearer interactions, richer rendering. The thing existed; it's now better.

Reliability Bug fixes, stability work, and error-path improvements. Anything that fixes broken behavior. Include both stability work users will perceive (retries, clearer errors on transient failures) and visible defects (incorrect counts, sort order, dark-mode flashes) that now render correctly.

Filter rules

Include an item only if a typical user — not a developer or maintainer — would plausibly notice. Exclude:

• Developer-only tools (devtools panels, in-app debug helpers)
• Internal observability / telemetry (PostHog events, Sentry instrumentation)
• Environment-variable knobs and other unsurfaced configuration (env vars are almost never user-facing — they exist for internal dev or escape-hatch use, not as documented product features)
• Tests, CI, build infrastructure
• Refactors and cleanup with no visible behavior change
• Accessibility tweaks (unless a major a11y initiative for the release)
• Backend internal stability with no user-perceptible effect (subprocess leaks, race fixes deep in the harness)

When uncertain, exclude — the user-facing list should feel curated, not exhaustive.

Keep the user-facing view public-safe: no real people's names, internal hostnames/service/tool names, or customer data — it is world-readable. (The internal notes may keep team-facing detail.) Same scrubbing as CLAUDE.md's "Public Visibility" section.

Mapping from internal categories

• Internal Features → user-facing What's new (only if genuinely new to users; dev-only features are excluded entirely).
• Internal UI Polish → split between Improvements (things that already worked and are now better) and Reliability (visible defects, incorrect behavior, error-path bugs that are now fixed).
• Internal Testing / CI / Cleanup → excluded from the user-facing view unless something there has a direct user impact worth flagging.

Visible bug fixes that look like polish (e.g., a flash on load, wrong sort order, doubled counters) go in Reliability, not Improvements — the defect existed and now it doesn't.

Same formatting rules apply: ≤10 words per bullet, • *Label:* description, sorted by user impact within each section.

Step 6: Output format

Output both reports in the same message, each in its own code fence, internal first, then user-facing. Use Slack-compatible formatting throughout: *text* for bold (single asterisks), • for bullet points, no heading syntax — just bold the section names.

Internal release notes

*Internal release notes for <title>*

*Features*
• *Label:* concise description

*UI Polish*
• *Label:* concise description

*Testing*
• *Label:* concise description

*CI*
• *Label:* concise description

*Cleanup*
• *Label:* concise description

User-facing release notes

*<title heading>*

*What's new*
• *Label:* concise description

*Improvements*
• *Label:* concise description

*Reliability*
• *Label:* concise description

Titles

Internal title:

• Release mode — *Internal release notes for v0.27* (use major.minor only, no patch suffix).
• Date-range mode — *Internal release notes for <human-readable date range>* (e.g., Feb 14–23).

User-facing title:

• Release mode — *Sculptor v0.27*.
• Date-range mode — *Sculptor <human-readable date range>*.

Omit any section that has zero items in either output.

Do not

• Include commit hashes in the output
• Exceed 10 words per bullet point
• Create a bullet point for every individual commit — always consolidate related work
• Include a section header if it has no items
• Pad the user-facing view with internal-only items just to fill a section
• Repeat the user-facing view verbatim — it's a curated subset, not a copy